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authorMarc Espie <espie@cvs.openbsd.org>1999-08-23 20:54:55 +0000
committerMarc Espie <espie@cvs.openbsd.org>1999-08-23 20:54:55 +0000
commita847a3a1bfaa5de194ff2edcfe7176d15cfdf694 (patch)
tree9d6c9c53162b21512eef8410cdd150fec0cec24c
parentef233545e6c3dcf885a8b3178a859a23604b359c (diff)
Merge
-rw-r--r--gnu/egcs/gcc/Makefile.in2
-rw-r--r--gnu/egcs/gcc/config/alpha/alpha.c5
-rw-r--r--gnu/egcs/gcc/config/m68k/m68k.c8
-rw-r--r--gnu/egcs/gcc/cp/Makefile.in29
-rw-r--r--gnu/egcs/gcc/cp/decl.c27
-rw-r--r--gnu/egcs/gcc/cp/g++FAQ.texi2423
-rw-r--r--gnu/egcs/gcc/invoke.texi269
7 files changed, 156 insertions, 2607 deletions
diff --git a/gnu/egcs/gcc/Makefile.in b/gnu/egcs/gcc/Makefile.in
index 5386abc9fa3..3796ec9391c 100644
--- a/gnu/egcs/gcc/Makefile.in
+++ b/gnu/egcs/gcc/Makefile.in
@@ -167,7 +167,7 @@ INSTALL_ASSERT_H = install-assert-h
# The GCC to use for compiling libgcc2.a, enquire, and libgcc1-test.
# Usually the one we just built.
# Don't use this as a dependency--use $(GCC_PASSES) or $(GCC_PARTS).
-GCC_FOR_TARGET = ./xgcc -B./ -B$(build_tooldir)/bin/ -I$(build_tooldir)/include
+GCC_FOR_TARGET = ./xgcc -B$(build_tooldir)/bin/ -B./ -I$(build_tooldir)/include
# This is used instead of ALL_CFLAGS when compiling with GCC_FOR_TARGET.
# It omits XCFLAGS, and specifies -B./.
diff --git a/gnu/egcs/gcc/config/alpha/alpha.c b/gnu/egcs/gcc/config/alpha/alpha.c
index 24178f16d2a..2d62693d76b 100644
--- a/gnu/egcs/gcc/config/alpha/alpha.c
+++ b/gnu/egcs/gcc/config/alpha/alpha.c
@@ -230,11 +230,6 @@ override_options ()
alpha_cpu = PROCESSOR_EV6;
target_flags |= MASK_BWX | MASK_MAX | MASK_FIX;
target_flags &= ~ (MASK_CIX);
-
- /* Except for EV6 pass 1 (not released), we always have
- precise arithmetic traps. Which means we can do
- software completion without minding trap shadows. */
- alpha_tp = ALPHA_TP_PROG;
}
else
error ("bad value `%s' for -mcpu switch", alpha_cpu_string);
diff --git a/gnu/egcs/gcc/config/m68k/m68k.c b/gnu/egcs/gcc/config/m68k/m68k.c
index d6618223d3a..9567c9d63a8 100644
--- a/gnu/egcs/gcc/config/m68k/m68k.c
+++ b/gnu/egcs/gcc/config/m68k/m68k.c
@@ -242,10 +242,10 @@ output_function_prologue (stream, size)
/* asm_fprintf() cannot handle %. */
#ifdef MOTOROLA
asm_fprintf (stream, "\tsubq.w %0I8,%Rsp\n\tsubq.w %0I%d,%Rsp\n",
- fsize + 4);
+ fsize + 4 - 8);
#else
asm_fprintf (stream, "\tsubqw %0I8,%Rsp\n\tsubqw %0I%d,%Rsp\n",
- fsize + 4);
+ fsize + 4 - 8);
#endif
}
else
@@ -790,10 +790,10 @@ output_function_epilogue (stream, size)
/* asm_fprintf() cannot handle %. */
#ifdef MOTOROLA
asm_fprintf (stream, "\taddq.w %0I8,%Rsp\n\taddq.w %0I%d,%Rsp\n",
- fsize + 4);
+ fsize + 4 - 8);
#else
asm_fprintf (stream, "\taddqw %0I8,%Rsp\n\taddqw %0I%d,%Rsp\n",
- fsize + 4);
+ fsize + 4 - 8);
#endif
}
else
diff --git a/gnu/egcs/gcc/cp/Makefile.in b/gnu/egcs/gcc/cp/Makefile.in
index fd5434c1539..9f2cd1c3c97 100644
--- a/gnu/egcs/gcc/cp/Makefile.in
+++ b/gnu/egcs/gcc/cp/Makefile.in
@@ -322,32 +322,3 @@ TAGS: force
.PHONY: TAGS
force:
-
-g++FAQ.info: $(srcdir)/g++FAQ.texi
- $(MAKEINFO) --no-split -o ./g++FAQ.info $(srcdir)/g++FAQ.texi
-
-# Preprocess the texi file so that the final document will have
-# hyperlinks.
-# It would be nice if texi2html could do something like this itself.
-
-# Assumption 1: the FAQ puts all http: and ftp: links in a @file{...}.
-# Assumption 2: newsgroups are like @file{comp.foo}
-# Assumption 3: email addresses match the regexp shown.
-
-g++FAQ.html: $(srcdir)/g++FAQ.texi
- mkdir work
- sed -e 's?@file{\([fth]*p://[^}]*\)}?@strong{<A HREF="\1">\1</A>}?' \
- -e 's?@file{\(comp\.[-a-z+.]*\)}?<A HREF="news:\1">\1</A>?' \
- -e 's?@file{\(gnu\.[-a-z+.]*\)}?<A HREF="news:\1">\1</A>?' \
- -e 's?\([.+a-zA-Z0-9-]*@@[.a-zA-Z0-9-]*[a-zA-Z0-9]\)?<A HREF="mailto:\1">\1</A>?' \
- $(srcdir)/g++FAQ.texi > work/g++FAQ.texi
- cd work; texi2html g++FAQ.texi
- mv work/*.html .
- rm -r work
-
-# Make plain-text form.
-
-g++FAQ.txt: $(srcdir)/g++FAQ.texi
- $(MAKEINFO) --no-split --no-headers -o - $(srcdir)/g++FAQ.texi |\
- sed '/^Concept Index/,$$d' > g++FAQ.txt
-
diff --git a/gnu/egcs/gcc/cp/decl.c b/gnu/egcs/gcc/cp/decl.c
index 24968d0a670..c60acc7b80d 100644
--- a/gnu/egcs/gcc/cp/decl.c
+++ b/gnu/egcs/gcc/cp/decl.c
@@ -4154,8 +4154,10 @@ pushdecl (x)
/* Warn if shadowing an argument at the top level of the body. */
else if (oldlocal != NULL_TREE && !DECL_EXTERNAL (x)
- && TREE_CODE (oldlocal) == PARM_DECL
- && TREE_CODE (x) != PARM_DECL)
+ && TREE_CODE (oldlocal) == PARM_DECL
+ /* Don't complain if it's from an enclosing function. */
+ && DECL_CONTEXT (oldlocal) == current_function_decl
+ && TREE_CODE (x) != PARM_DECL)
{
/* Go to where the parms should be and see if we
find them there. */
@@ -5815,6 +5817,7 @@ lookup_name_real (name, prefer_type, nonclass, namespaces_only)
{
struct tree_binding b;
val = binding_init (&b);
+ flags |= LOOKUP_COMPLAIN;
if (!qualified_lookup_using_namespace (name, type, val, flags))
return NULL_TREE;
val = select_decl (val, flags);
@@ -7339,6 +7342,13 @@ start_decl (declarator, declspecs, initialized, attributes, prefix_attributes)
DECL_INITIAL (decl) = error_mark_node;
}
+#ifdef SET_DEFAULT_DECL_ATTRIBUTES
+ SET_DEFAULT_DECL_ATTRIBUTES (decl, attributes);
+#endif
+
+ /* Set attributes here so if duplicate decl, will have proper attributes. */
+ cplus_decl_attributes (decl, attributes, prefix_attributes);
+
if (context && TYPE_SIZE (complete_type (context)) != NULL_TREE)
{
push_nested_class (context, 2);
@@ -7396,13 +7406,6 @@ start_decl (declarator, declspecs, initialized, attributes, prefix_attributes)
decl);
}
-#ifdef SET_DEFAULT_DECL_ATTRIBUTES
- SET_DEFAULT_DECL_ATTRIBUTES (decl, attributes);
-#endif
-
- /* Set attributes here so if duplicate decl, will have proper attributes. */
- cplus_decl_attributes (decl, attributes, prefix_attributes);
-
/* Add this decl to the current binding level, but not if it
comes from another scope, e.g. a static member variable.
TEM may equal DECL or it may be a previous decl of the same name. */
@@ -10387,10 +10390,8 @@ grokdeclarator (declarator, declspecs, decl_context, initialized, attrlist)
size = t;
}
- itype = make_node (INTEGER_TYPE);
- TYPE_MIN_VALUE (itype) = size_zero_node;
- TYPE_MAX_VALUE (itype) = build_min
- (MINUS_EXPR, sizetype, size, integer_one_node);
+ itype = build_index_type (build_min
+ (MINUS_EXPR, sizetype, size, integer_one_node));
goto dont_grok_size;
}
diff --git a/gnu/egcs/gcc/cp/g++FAQ.texi b/gnu/egcs/gcc/cp/g++FAQ.texi
deleted file mode 100644
index 3cbec50459c..00000000000
--- a/gnu/egcs/gcc/cp/g++FAQ.texi
+++ /dev/null
@@ -1,2423 +0,0 @@
-\input texinfo.tex @c -*-texinfo-*-
-@c %**start of header
-@setfilename g++FAQ.info
-@settitle Frequently asked questions about the GNU C++ compiler
-@setchapternewpage off
-@c version: %W% %G%
-@c %**end of header
-
-@iftex
-@finalout
-@end iftex
-@titlepage
-@title G++ FAQ
-@subtitle Frequently asked questions about the GNU C++ compiler
-@subtitle June 8, 1998
-@sp 1
-@author Joe Buck
-@page
-@end titlepage
-
-@ifinfo
-@node Top, basics, (dir), (dir)
-@top
-@unnumbered FAQ for g++ and libg++, by Joe Buck (jbuck@@synopsys.com)
-@end ifinfo
-
-@cindex FAQ for g++, latest version
-@cindex Archive site for FAQ lists
-@cindex rtfm.mit.edu
-@cindex Joe Buck <jbuck@@synopsys.com>
-@cindex FAQ for C++
-
-This is a list of frequently asked questions (FAQ) for g++ users; thanks to
-all those who sent suggestions for improvements. Thanks to Marcus Speh
-for doing the index. A hypertext version is available on the World Wide
-Web at @file{http://www.cygnus.com/misc/g++FAQ_toc.html}.
-
-Please send updates and corrections to the FAQ to
-@code{jbuck@@synopsys.com}. Please do @emph{not} use me as a resource
-to get your questions answered; that's what @file{gnu.g++.help} is for and I
-don't have the time to support the net's use of g++. If you ignore this
-request your message to me may be deleted without a reply. Sorry.
-
-Many FAQs, including this one, are available on the archive site
-``rtfm.mit.edu''; see @*
-@file{ftp://rtfm.mit.edu/pub/usenet/news.answers}.
-This FAQ may be found in the subdirectory g++-FAQ.
-
-@cindex Marshall Cline
-@cindex comp.lang.c++
-@cindex C++ FAQ
-This FAQ is intended to supplement, not replace, Marshall Cline's
-excellent FAQ for the C++ language and for the newsgroup
-@file{comp.lang.c++}. Especially if g++ is the first C++
-compiler you've ever used, the question ``How do I do <X> with g++?''
-is probably really ``How do I do <X> in C++?''.
-You can find this FAQ at
-@file{ftp://rtfm.mit.edu/pub/usenet/comp.lang.c++},
-or in HTML form at @file{http://www.cerfnet.com/~mpcline/On-Line-C++-FAQs/}.
-
-@menu
-* basics:: What is g++? How do I get it?
-* egcs and 2.8.x:: The next generation(s) of g++
-* installation:: How to install, installation problems
-* evolution:: The Evolution of g++
-* User Problems:: Commonly reported problems and bugs
-* legalities:: Lawyer stuff, GPL, LGPL, etc.
-* index:: Index of terms
-
- --- The Detailed Node Listing ---
-
-The basics: what is g++?
-
-* latest versions:: What are the latest versions of g++ and libraries?
-* g++ for Unix:: How do I get g++ for Unix?
-* getting-egcs:: How do I get egcs?
-* g++ for HP::
-* g++ for Solaris 2.x::
-* g++ for other platforms::
-* 1.x vs 2.x versions::
-
-The Next Generation(s) of g++
-
-* new-in-2.8.x:: What's new in gcc 2.8.x?
-* egcs-intro:: What is egcs?
-* egcs-whats-new:: What's new in egcs vs 2.7.2?
-* egcs-bug-fixes:: What was fixed in the latest egcs releases?
-* egcs-linux:: If I install on Linux, will it overwrite my libraries?
-* egcs-run-both:: How can I run both egcs and an FSF release?
-* egcs-vs-2.8.x:: How will egcs affect 2.8.x?
-* egcs-robustness:: How robust is egcs?
-
-Installation Issues and Problems
-
-* gcc-2 + g++-1::
-* what else do I need?::
-* use GNU linker?::
-* Use GNU assembler?::
-* shared libraries::
-* repository::
-* repo bugs::
-* Use GNU C library?::
-* Global constructor problems::
-* Strange assembler errors::
-* Other problems building libg++::
-* More size_t problems::
-* Rebuild libg++?::
-* co-existing versions::
-* Installing on Linux::
-* Linux Slackware 3.0::
-
-The Evolution of g++
-
-* version 2.7.x:: What's changed in 2.7.x from earlier versions
-* libstdc++::
-
-User Problems
-
-* missing virtual table::
-* for scope::
-* const constructor::
-* unused parameter warnings::
-* jump crosses initialization::
-* Demangler::
-* static data members::
-* internal compiler error::
-* bug reports::
-* porting to g++::
-* name mangling::
-* problems linking with other libraries::
-* documentation::
-* templates::
-* undefined templates::
-* redundant templates::
-* Standard Template Library::
-* STL and string::
-* exceptions::
-* namespaces::
-* agreement with standards::
-* compiling standard libraries::
-* debugging on SVR4 systems::
-* debugging problems on Solaris::
-* X11 conflicts with libg++::
-* assignment to streams::
-@end menu
-
-@node basics, egcs and 2.8.x, Top, Top
-@chapter The basics: what is g++?
-
-@cindex Free Software Foundation
-@cindex GNU Public License
-@cindex GPL
-
-g++ is the traditional nickname of GNU C++, a freely redistributable
-C++ compiler produced by the Free Software Foundation plus dozens of
-skilled volunteers. I say ``traditional nickname'' because the GNU
-compiler suite, gcc, bundles together compilers for C, Objective-C,
-and C++ in one package.
-
-While the source code to gcc/g++ can be downloaded for free,
-it is not public domain, but is protected by the GNU Public License,
-or GPL (@pxref{legalities}).
-
-@menu
-* latest versions:: What is the latest version of gcc/g++/libg++?
-* g++ for Unix:: How do I get a copy of g++ for Unix?
-* getting-egcs:: How do I get egcs?
-* g++ for HP:: Getting g++ for the HP precision architecture
-* g++ for Solaris 2.x:: Getting g++ for Solaris
-* g++ for other platforms::
-* 1.x vs 2.x versions::
-@end menu
-
-@node latest versions, g++ for Unix, basics, basics
-@section What is the latest version of gcc, g++, and libg++?
-
-@cindex egcs release
-
-The newest release from the egcs project (on the Web:
-@file{http://www.cygnus.com/egcs/}) is egcs-1.0.3, released May 15,
-1998.
-
-@cindex gcc/g++, version date
-The current version of gcc/g++ is 2.8.1, released March 4, 1998.
-This release fixes some bugs in the 2.8.x release from January.
-It is a huge improvement over the 2.7.x releases.
-
-libg++ has now been deprecated (that is, it is no longer really
-supported), so gcc2.8.1 users need to grab libstdc++-2.8.1 from
-their favorite GNU site (egcs users don't need to get this separately
-as it is bundled with egcs). However, there is an 'add-on' libg++ 2.8.1
-mini-release. If you want to use it, you need to combine it with
-libstdc++ 2.8.1.
-
-I would strongly recommend that anyone using a g++ version earlier
-than 2.7.2 should upgrade if at all possible (@pxref{version 2.7.x}).
-Folks who need modern C++ features should upgrade to 2.8.1 or egcs.
-
-For some non-Unix platforms, the latest port of gcc may be an earlier
-version (2.7.2, say). You'll need to use a version of libg++ that
-has the same first two digits as the compiler version, e.g. use libg++
-2.7.x (for the latest x you can find) with gcc version 2.7.2.1.
-
-From version 2.8.0 on, you don't need libg++, you only need libstdc++
-(again, the latest version with the same two leading digits as the
-version of g++ you use).
-
-The latest "1.x" version of gcc is 1.42, and the latest "1.x" version of
-g++ is 1.42.0.
-While gcc 1.42 is quite usable for C programs, g++ 1.x is only of
-historical interest (since the C++ language has changed so much).
-
-@node g++ for Unix, getting-egcs, latest versions, basics
-@section How do I get a copy of g++ for Unix?
-
-First, you may already have it if you have gcc for your platform;
-g++ and gcc are combined now (as of gcc version 2.0).
-@cindex GNU gcc, version
-@cindex GNU g++ and gcc
-
-You can get g++ from a friend who has a copy, by anonymous FTP or
-UUCP, or by ordering a tape or CD-ROM from the Free Software
-Foundation.
-@cindex g++, ordering
-@cindex g++, getting a copy
-
-The Free Software Foundation is a nonprofit organization that
-distributes software and manuals to raise funds for more GNU
-development. Getting your copy from the FSF contributes directly to
-paying staff to develop GNU software. CD-ROMs cost $400 if an
-organization is buying, or $100 if an individual is buying. Tapes
-cost around $200 depending on media type. I recommend asking for
-version 2, not version 1, of g++.
-@cindex FSF [Free Software Foundation]
-@cindex GNU [GNU's not unix]
-
-For more information about ordering from the FSF, contact
-gnu@@prep.ai.mit.edu, phone (617) 542-5942 or anonymous ftp file
-@file{ftp://prep.ai.mit.edu/pub/gnu/GNUinfo/ORDERS} (you can
-also use one of the sites listed below if you can't get into ``prep'').
-
-@cindex FSF, contact <gnu@@prep.ai.mit.edu>
-
-Here is a list of anonymous FTP archive sites for GNU software.
-If no directory is given, look in @file{/pub/gnu}.
-
-@cindex GNUware, anonymous FTP sites
-
-@example
-ASIA: ftp.cs.titech.ac.jp, tron.um.u-tokyo.ac.jp:/pub/GNU/prep
-cair-archive.kaist.ac.kr, ftp.nectec.or.th:/pub/mirrors/gnu
-
-AUSTRALIA: archie.au:/gnu (archie.oz or archie.oz.au for ACSnet)
-
-AFRICA: ftp.sun.ac.za
-
-MIDDLE-EAST: ftp.technion.ac.il:/pub/unsupported/gnu
-
-EUROPE: irisa.irisa.fr, ftp.univ-lyon1.fr,
-ftp.mcc.ac.uk, unix.hensa.ac.uk:/mirrors/uunet/systems/gnu,
-src.doc.ic.ac.uk:/gnu, ftp.ieunet.ie, ftp.eunet.ch,
-nic.switch.ch:/mirror/gnu, ftp.informatik.rwth-aachen.de,
-ftp.informatik.tu-muenchen.de, ftp.win.tue.nl, ftp.nl.net,
-ftp.etsimo.uniovi.es, ftp.funet.fi, ftp.denet.dk,
-ftp.stacken.kth.se, isy.liu.se, ftp.luth.se:/pub/unix/gnu,
-ftp.sunet.se, archive.eu.net
-
-SOUTH AMERICA: ftp.inf.utfsm.cl, ftp.unicamp.br
-
-WESTERN CANADA: ftp.cs.ubc.ca:/mirror2/gnu
-
-USA: wuarchive.wustl.edu:/systems/gnu, labrea.stanford.edu,
-ftp.digex.net, ftp.kpc.com:/pub/mirror/gnu, f.ms.uky.edu:/pub3/gnu,
-jaguar.utah.edu:/gnustuff, ftp.hawaii.edu:/mirrors/gnu,
-uiarchive.cso.uiuc.edu, ftp.cs.columbia.edu:/archives/gnu/prep,
-gatekeeper.dec.com:/pub/GNU, ftp.uu.net:/systems/gnu
-@end example
-
-The ``official site'' is prep.ai.mit.edu, but your transfer will probably
-go faster if you use one of the above machines.
-
-@cindex gzip
-Most GNU utilities are compressed with ``gzip'', the GNU compression
-utility. All GNU archive sites should have a copy of this program,
-which you will need to uncompress the distributions.
-
-@cindex libstdc++
-Don't forget to retrieve libstdc++ as well!
-
-@node getting-egcs, g++ for HP, g++ for Unix, basics
-@section How do I get egcs?
-
-See @xref{egcs-intro} to find out what egcs is.
-
-You can obtain egcs either by FTP or with a Web browser. To do the
-latter, start from @file{http://egcs.cygnus.com/}. The master
-FTP site is @file{ftp://ftp.cygnus.com/pub/egcs/releases}, however
-you'll probably get a faster download if you use a mirror site.
-Mirror sites also have egcs snapshots unless otherwise noted.
-@itemize @bullet
-@item
-US (west coast): @file{ftp://go.cygnus.com/pub/ftp.cygnus.com/egcs/}
-@item
-US (east coast): @file{ftp://ftp.goof.com/pub/pcg/egcs/}
-or (for releases only): @file{ftp://cambridge.cygnus.com/pub/egcs/}
-@item
-US (Arizona): @file{ftp://ftp.ninemoons.com/pub/mirrors/egcs/}
-@item
-UK: @file{ftp://sunsite.doc.ic.ac.uk/Mirrors/egcs.cygnus.com/pub/egcs/}
-@item
-Austria: @file{ftp://gd.tuwien.ac.at/gnu/egcs}
-@item
-France: @file{ftp://ftp.ilog.fr/pub/mirrors/egcs/} or
-@file{ftp://ftp.lip6.fr/pub/egcs}
-@item
-Czech Republic: @file{ftp://sunsite.mff.cuni.cz/pub/GNU/egcs/}
-@item
-Denmark: @file{ftp://sunsite.auc.dk/pub/egcs/}
-@item
-Germany @file{ftp://ftp.fu-berlin.de/unix/languages/egcs/} or
-@file{ftp://ftp.gwdg.de/pub/cygnus/egcs/}
-@item
-Poland: @file{ftp://sunsite.icm.edu.pl/pub/programming/egcs/}
-@item
-Sweden: @file{ftp://ftp.sunet.se/pub/gnu/egcs/}
-@item
-Brasil (releases only, no snapshots):
-@file{ftp://ftp.unicamp.br/pub/gnu/=EXTRA=/cygnus/egcs/}
-@item
-Portugal: @file{ftp://ftp.lca.uevora.pt/pub/egcs/}
-@item
-Romania: @file{ftp://ftp.lbi.ro/pub/egcs/}
-@item
-Australia/NZ (release only): @file{ftp://moshpit.cygnus.com/pub/egcs/}
-@end itemize
-
-@node g++ for HP, g++ for Solaris 2.x, getting-egcs, basics
-@section Getting gcc/g++ for the HP Precision Architecture
-
-@cindex HP Precision Architecture
-@cindex Hewlett-Packard
-@cindex GNU GAS
-@cindex GNU gdb
-
-If you use the HP Precision Architecture (HP-9000/7xx and HP-9000/8xx)
-and you want to use debugging, you'll need to use the GNU assembler, GAS
-(version 2.3 or later). If you build from source, you must tell the
-configure program that you are using GAS or you won't get debugging
-support. A non-standard debug format is used, since until recently HP
-considered their debug format a trade secret. Thanks to the work of
-lots of good folks both inside and outside HP, the company has seen the
-error of its ways and has now released the required information. The
-team at the University of Utah that did the gcc port now has code that
-understands the native HP format.
-
-There are binaries for GNU tools in
-@file{ftp://jaguar.cs.utah.edu/dist/},
-but these are older versions.
-
-Jeff Law has left the University of Utah, so the Utah prebuilt
-binaries may be discontinued.
-
-@node g++ for Solaris 2.x, g++ for other platforms, g++ for HP, basics
-@section Getting gcc/g++ binaries for Solaris 2.x
-
-``Sun took the C compiler out of Solaris 2.x. Am I stuck?''
-
-@cindex Solaris
-@cindex gcc/g++ binaries for Solaris
-
-You can obtain and install prebuilt binaries of gcc.
-
-
-@cindex Solaris pkgadd utility
-The WWW site @file{http://smc.vnet.net/}
-contains various
-GNU and freeware programs for Solaris 2.5 or 2.6, for either the Sparc
-or Intel platforms. These are
-packaged to enable easy installation using the Solaris ``pkgadd'' utility.
-These include GNU emacs, gcc, gdb, perl, and others.
-
-You can find also find prebuilt binaries of many GNU tools, including the
-compiler, at @file{http://sunsite.unc.edu/pub/solaris/}.
-
-@node g++ for other platforms, 1.x vs 2.x versions, g++ for Solaris 2.x, basics
-@section How do I get a copy of g++ for (some other platform)?
-
-@cindex Windows NT support
-As of gcc-2.7.x, there is Windows NT support in gcc. Some special
-utilities are required. See the INSTALL file from the distribution.
-If you're interested in GNU tools on Windows NT, see
-@file{http://www.cygnus.com/misc/gnu-win32/} on the WWW, or the
-anonymous FTP directory
-@file{ftp://ftp.cygnus.com/pub/gnu-win32/}.
-
-@cindex VMS support
-@cindex VAX
-@cindex VMS, g++/libg++ precompiled
-
-The standard gcc/g++ distribution includes VMS support for the Vax.
-Since the FSF people don't use VMS, it's likely to be somewhat less
-solid than the Unix version. Precompiled copies of g++ and libg++ in
-VMS-installable form for the Vax are available by FTP from
-@file{ftp://mango.rsmas.miami.edu/pub/VMS-gcc/}.
-
-@cindex OpenVMS/Alpha
-Klaus Kaempf (kkaempf@@progis.de)
-has done a port to OpenVMS for the Alpha; this is not yet a
-part of the official gcc/g++.
-The port includes g++ and all libraries from the libg++ distribution. See
-@file{http://www.progis.de} for more details.
-
-@cindex MS-DOS support
-@cindex Delorie's gcc/g++
-@cindex DJGPP
-@cindex EMX
-There are two different versions of gcc/g++ for MS-DOS: EMX and DJGPP.
-EMX also works for OS/2 and is described later.
-DJGPP is DJ Delorie's port. It can be found on many FTP archive
-sites; try
-@file{ftp://ftp.coast.net/SimTel/vendors/djgpp/}
-or, for a complete list, see
-@file{http://www.delorie.com/djgpp/getting.html}.
-
-
-The latest version of DJGPP is 2.00. See
-@file{http://www.delorie.com/djgpp/v2/} for information on this version.
-
-FSF sells floppies with DJGPP on them; see above for ordering software
-from the FSF.
-
-DJGPP has its own newsgroup: @file{comp.os.msdos.djgpp}.
-
-@cindex Amiga support
-Development and porting efforts for GNU tools, including gcc/g++, for
-the Amiga are maintained by an initiative named ADE (Amiga Developers
-Environment. More information about ADE is available at
-@file{http://www.ninemoons.com/}.
-
-For more information on Amiga ports of gcc/g++, retrieve the file
-@file{ftp://prep.ai.mit.edu/pub/gnu/MicrosPorts/Amiga}.
-
-@cindex Atari ST support
-A port of gcc to the Atari ST can be found at @*
-@file{ftp://atari.archive.umich.edu/atari/Gnustuff/Tos}
-along with many
-other GNU programs. This version is usually the same as the latest FSF
-release. See the ``Software FAQ'' for the Usenet group
-@file{comp.sys.atari.st} for more information.
-
-@cindex EMX port
-@cindex OS/2 support
-
-EMX is a port of gcc to OS/2; it can also be used on MS-DOS. In addition to
-the compiler port, the EMX port's C library attempts to provide a
-Unix-like environment. For more information ask around on
-@file{comp.os.os2.programmer.porting}. Version 0.9c, based on gcc-2.7.2.1,
-was released in
-November 1996. It is available by FTP and the WWW from, among other
-places
-
-@example
-@file{http://www.os2ss.com/unix/emx09c/}
-@file{ftp://ftp.cdrom.com/pub/os2/emx09c/} (US)
-@file{ftp://ftp.leo.org/pub/comp/os/os2/leo/devtools/emx+gcc/} (Germany)
-@end example
-
-Eberhard Mattes did the EMX port. His address is
-mattes@@azu.informatik.uni-stuttgart.de.
-Read the FAQ file included with the distribution before harrassing the author.
-
-@cindex Apple support
-@cindex Macintosh support
-
-I'm looking for more information on gcc/g++ support on the Apple
-Macintosh. Until recently, this FAQ did not provide such information,
-but FSF is no longer boycotting Apple as the League for Programming
-Freedom boycott has been dropped.
-
-Versions 1.37.1 and 2.3.3 of gcc were ported by Stan Shebs and are available
-at @*
-@file{ftp://ftp.cygnus.com/pub/mac}
-
-They are both interfaced to MPW.
-Stan is working on a version using the current (post-2.7) sources, contact
-him directly (shebs@@cygnus.com) for more information.
-
-@node 1.x vs 2.x versions, , g++ for other platforms, basics
-@section But I can only find g++-1.42!
-
-``I keep hearing people talking about g++ 2.8.1 (or some other number
-starting with 2), but the latest version I can find is g++ 1.42. Where
-is it?''
-
-@cindex Objective-C
-@cindex g++, version number
-As of gcc 2.0, C, C++, and Objective-C as well are all combined into a
-single distribution called gcc. If you get gcc you already have g++. The
-standard installation procedure for any gcc version 2 compiler will
-install the C++ compiler as well.
-
-One could argue that we shouldn't even refer to "g++-2.x.y" but it's a
-convention. It means ``the C++ compiler included with gcc-2.x.y.''
-
-@node egcs and 2.8.x, installation, basics, Top
-@chapter The Next Generation(s) of g++
-
-@menu
-* new-in-2.8.x:: What's new in gcc 2.8.x?
-* egcs-intro:: What is egcs?
-* egcs-whats-new:: What's new in egcs vs 2.7.2?
-* egcs-bug-fixes:: What was fixed in the latest egcs releases?
-* egcs-linux:: If I install on Linux, will it overwrite my libraries?
-* egcs-run-both:: How can I run both egcs and an FSF release?
-* egcs-vs-2.8.x:: How will egcs affect 2.8.x?
-* egcs-robustness:: How robust is egcs?
-@end menu
-
-@node new-in-2.8.x, egcs-intro, egcs and 2.8.x, egcs and 2.8.x
-@section What's new in gcc/g++ 2.8.x?
-
-After a two-year wait, gcc 2.8.0 was released in January 1998, along
-with libstdc++-2.8.0 and libg++-2.8.0. This has been followed up in
-March by the 2.8.1 release of all three packages, though libg++-2.8.1
-is an "add-on" (it does not contain libstdc++ anymore). Note that
-libstdc++ is required.
-
-For those familiar with egcs, the most obvious difference between
-gcc-2.8.x and egcs is the packaging: egcs is bundled with
-libstdc++, and gcc-2.8.x does not contain the class library. Otherwise,
-except for the lack of the @code{-frepo} option and some bug fixes
-that have not yet made it into gcc-2.8.x, C++ users will find the
-two compilers to be almost the same at this stage, other than that 2.8.x
-users may get more bogus warnings with -Wall and optimization because
-some fixes to flow analysis in the presence of exceptions that egcs made
-are not yet present in gcc 2.8.x (as of 2.8.1).
-
-The flow analysis problem in 2.8.1 produces bad code in some cases, not
-just spurious errors. It only affects code that actually throws an
-exception, and only the path corresponding to a thrown exception gets
-misoptimized. If this happens, you can try reducing the level of
-optimization.
-
-Because the new feature lists for egcs and gcc 2.8 are almost the same,
-please see @xref{egcs-whats-new} for a list of new features. It is a
-fairly long list.
-
-@node egcs-intro, egcs-whats-new, new-in-2.8.x, egcs and 2.8.x
-@section What is egcs?
-
-egcs is the experimental GNU compiler system (see
-@file{http://www.cygnus.com/egcs} on the Web). It is an effort to
-accelerate development of new gcc features by providing a more open
-development model than gcc has traditionally used.
-
-The first egcs release, egcs-1.0, came out on December 3, 1997.
-The current release is egcs-1.0.3, released May 15, 1998.
-
-Questions not addressed here may be answered in the egcs FAQ
-(@file{http://www.cygnus.com/egcs/faq.html}).
-
-@node egcs-whats-new, egcs-bug-fixes, egcs-intro, egcs and 2.8.x
-@section What new C++ features are in egcs?
-
-@strong{Note}: unless indicated otherwise, these features are also
-present in g++ 2.8.x.
-
-@itemize @bullet
-@item
-@cindex integrated libstdc++
-
-The standard C++ classes are integrated with the egcs release (but
-@strong{not} for gcc-2.8.x, which does not include the class libraries).
-libg++ is not being
-supported, though an add-on version that will work with egcs can be found at
-@file{ftp://ftp.yggdrasil.com/private/hjl/libg++-2.8.0b6.6.tar.gz},
-thanks to H.J. Lu. The compiler and library are configured and built
-in one step.
-
-@item
-@cindex new template implementation
-A completely new template implementation, much closer to the draft
-standard. Limitations in 2.7.2.x concerning inlining template functions
-are eliminated. Static template data members, template class member
-functions, partial specification, and default template arguments are
-supported. An instantiation method resembling that used in Borland C++
-(instantiating functions possibly in multiple .o files and using weak
-symbols to link correctly) is provided, in addition to other
-options. The SGI version of STL is shipped verbatim with libstdc++
-(libstdc++ is included with egcs, separate with gcc-2.8.x).
-
-@item
-@cindex redundant template elimination
-@cindex templates: removing redundancy
-On ELF platforms (Linux/ELF, Solaris, SVR4), if the GNU linker is used,
-duplicated template functions and virtual function tables are eliminated
-at link time.
-
-@item
-@cindex repository
-@cindex -frepo
-The @code{-frepo} flag is supported in egcs (it is not in 2.8.x).
-However, because of the previous item, I don't recommend its use on ELF
-systems, as the default method is better.
-
-@item
-@cindex new exception implementation
-Exception handling has been re-worked; exceptions will work together
-with optimization.
-Actually, there are two separate implementations: one based on setjmp/longjmp
-and designed to be highly portable, and one designed to be more efficient but
-requiring more processor-specific support (getting exceptions right has proven
-to be extremely difficult and has been the chief obstacle to getting a new
-release out).
-
-@item
-@cindex RTTI
-RTTI has been re-done to work correctly and is on by default.
-
-@item
-@cindex overloading
-Overloading has been re-worked to conform to the latest draft of the
-standard.
-
-@item
-There are many more changes: see @file{http://www.cygnus.com/egcs/c++features.html} for a list.
-@end itemize
-
-Features that are still missing include namespaces and templates as
-template arguments, though there is support for the latter feature
-in the egcs snapshots (which has not yet made it into a release).
-
-@node egcs-bug-fixes, egcs-linux, egcs-whats-new, egcs and 2.8.x
-@section What was fixed in the latest egcs releases?
-
-@itemize @bullet
-
-@item
-Add support for Red Hat 5.0 Linux and better support for Linux
-systems using glibc2. (1.0.3 was specifically done to fix some
-remaining problems detected when building Red Hat 5.1).
-
-@item
-Compatibility with both egcs-1.0 and gcc-2.8 libgcc exception handling
-interfaces (see below).
-
-@item
-Various bugfixes in the x86, hppa, mips, and rs6000/ppc backends.
-
-@item
-A few machine independent bugfixes, mostly to fix code generation bugs
-when building Linux kernels or glibc.
-
-@item
-Fix a few critical exception handling and template bugs in the C++
-compiler.
-
-@item
-Fix build problems on x86-solaris systems.
-@end itemize
-
-To avoid future compatibility problems, we strongly urge anyone who is
-planning on distributing shared libraries that contain C++ code to
-upgrade to at least egcs-1.0.1 first (and preferably to 1.0.3). See
-@file{http://www.cygnus.com/egcs/egcs-1.0.1.html} for details about the
-compatibility issues as well as additional information about the
-bugfixes since the egcs-1.0 release.
-
-@node egcs-linux, egcs-run-both, egcs-bug-fixes, egcs and 2.8.x
-@section If I install egcs on Linux, will it overwrite my libraries?
-
-No. If you build from sources, by default, egcs installs executables in
-@code{/usr/local/bin} and libraries in @code{/usr/local/lib}, and you
-can change this default if desired (see next section).
-
-If, however, you install a package (e.g. Debian or Red Hat) that wants
-to put egcs in @code{/usr/bin} and @code{/usr/lib}, then yes, you are
-replacing your system compiler and C++ library (I don't know if anyone
-has provided such packages yet -- proceed with caution).
-
-@node egcs-run-both, egcs-vs-2.8.x, egcs-linux, egcs and 2.8.x
-@section How can I run both egcs and an FSF release of g++ on the same machine?
-
-The recommended approach is to provide a different argument to the
-@code{--prefix} flag when you configure egcs. For example, say
-@code{--prefix=/usr/local/egcs} and then, after installation, you
-can make symbolic links from @file{/usr/local/egcs/bin} to whereever
-you want, for example
-
-@example
-ln -s /usr/local/egcs/bin/gcc /usr/local/bin/egcc
-ln -s /usr/local/egcs/bin/g++ /usr/local/bin/eg++
-@end example
-
-@node egcs-vs-2.8.x, egcs-robustness, egcs-run-both, egcs and 2.8.x
-@section What about 2.8.x? How does egcs affect the 2.8.x development?
-
-2.8.0 has now been released (followed up by 2.8.1), with essentially the
-same C++ front end as egcs.
-
-Bug fixes generated in egcs will be passed to the 2.8.x releases for
-inclusion; the reverse is also taking place, though a bug fix may
-appear in one before it does in the other. egcs development is currently
-proceeding much more quickly than gcc 2.8.x development. However, there
-is essentially only one C++ front end, which is shared by the two
-distinct compiler back ends (however, since egcs-1.0.3 is newer than
-gcc 2.8.1, it has more bug fixes).
-
-@node egcs-robustness, , egcs-vs-2.8.x, egcs and 2.8.x
-@section How robust is egcs?
-
-While the 'e' stands for 'experimental', egcs has been tested thoroughly
-and should be of high quality. The author considers egcs 1.0.3 the
-most robust GNU C++ compiler ever produced.
-
-@node installation, evolution, egcs and 2.8.x, Top
-@chapter Installation Issues and Problems
-
-@menu
-* gcc-2 + g++-1::
-* what else do I need?::
-* use GNU linker?::
-* Use GNU assembler?::
-* shared libraries::
-* repository::
-* repo bugs::
-* Use GNU C library?::
-* Global constructor problems::
-* Strange assembler errors::
-* Other problems building libg++::
-* More size_t problems::
-* Rebuild libg++?::
-* co-existing versions::
-* Installing on Linux::
-* Linux Slackware 3.0::
-@end menu
-
-@node gcc-2 + g++-1, what else do I need?, installation, installation
-@section I can't build g++ 1.x.y with gcc-2.x.y!
-
-``I obtained gcc-2.x.y and g++ 1.x.y and I'm trying to build it, but
-I'm having major problems. What's going on?''
-
-@cindex g++, building
-If you wish to build g++-1.42, you must obtain gcc-1.42 first. The
-installation instructions for g++ version 1 leave a lot to be desired,
-unfortunately, and I would recommend that, unless you have a special
-reason for needing the 1.x compiler, that C++ users use the latest
-g++-2.x version, as it
-is the version that is being actively maintained.
-
-@cindex g++, template support
-@cindex Templates
-@cindex ANSI draft standard
-There is no template support in g++-1.x, and it is generally much further
-away from the ANSI draft standard than g++-2.x is.
-
-@node what else do I need?, use GNU linker?, gcc-2 + g++-1, installation
-@section OK, I've obtained gcc; what else do I need?
-
-@cindex libg++
-First off, you'll want libg++ as you can do almost nothing without it
-(unless you replace it with some other class library).
-
-@cindex GNU GAS
-@cindex GNU GAS [assembler]
-Second, depending on your platform, you may need "GAS", the GNU assembler,
-or the GNU linker (see next question).
-
-@cindex GNU gdb
-Finally, while it is not required, you'll almost certainly want the GNU
-debugger, gdb. The latest version is
-4.17, released April 27, 1997.
-Other debuggers (like dbx, for example) will normally not be able to
-understand at least some of the debug information produced by g++.
-
-@node use GNU linker?, Use GNU assembler?, what else do I need?, installation
-@section Should I use the GNU linker, or should I use "collect"?
-
-@cindex Linker
-@cindex System VR3, linker
-@cindex System VR4, linker
-First off, for novices: special measures must be taken with C++ to arrange
-for the calling of constructors for global or static objects before the
-execution of your program, and for the calling of destructors at the end.
-(Exception: System VR3 and System VR4 linkers, Linux/ELF, and some other
-systems support user-defined
-segments; g++ on these systems requires neither the GNU linker nor
-collect. So if you have such a system, the answer is that you don't
-need either one, though using GNU ld does have some advantages over
-the native linker in some cases).
-
-@cindex AT&T cfront
-@cindex Cfront-end
-@cindex collect program
-@cindex GNU linker
-@cindex GNU binutils
-If you have experience with AT&T's "cfront", this function is performed
-there by programs named "patch" or "munch". With GNU C++, it is performed
-either by the GNU linker or by a program known as "collect". The collect
-program is part of the gcc-2.x distribution; you can obtain the GNU linker
-separately as part of the "binutils" package. The latest version of
-binutils is 2.9.1, released May 1, 1998.
-
-Note that if you want to use exceptions on Intel-like platforms and use
-gas (e.g. you run Linux), you need binutils version 2.8.1 or newer for
-exceptions to work correctly!
-
-(To be technical, it's "collect2"; there were originally several
-alternative versions of collect, and this is the one that survived).
-
-There are advantages and disadvantages to either choice.
-
-Advantages of the GNU linker:
-@cindex GNU linker, advantages
-@cindex GNU ld
-@cindex ld [GNU linker]
-
-It's faster than using collect -- collect basically runs the standard Unix
-linker on your program twice, inserting some extra code after the first
-pass to call the constructors. This is a sizable time penalty for large
-programs. The GNU linker does not require this extra pass.
-
-GNU ld reports undefined symbols using their true names, not the mangled
-names (but as of 2.7.0 so does collect).
-
-If there are undefined symbols, GNU ld reports which object file(s) refer to
-the undefined symbol(s). On some OSes (e.g. SunOS, Solaris) the native
-linker does not do this, so you have to track down who's referring to
-the missing symbols yourself.
-
-As of binutils version 2.2, on systems that use the so-called "a.out"
-debug format (e.g. Suns running SunOS 4.x), the GNU linker compresses
-the debug symbol table considerably. The 2.7 version adds some symbol
-table compression for ELF and Solaris targets.
-
-Users of egcs or 2.8.x on ELF systems should definitely
-use GNU ld (2.8 or later), as it will automatically remove duplicate
-instantiations of templates, virtual function tables, or ``outlined''
-copies of inline functions.
-
-@cindex collect linker, advantages
-Advantages of collect:
-
-@cindex Shared libraries
-If your native linker supports shared libraries, you can use shared
-libraries with collect. This used to be a strong reason @emph{not}
-to use the GNU linker, but recent versions of GNU ld support linking
-with shared libraries on many platforms, and creating shared libraries
-on a few (such as Intel x86 systems that use ELF object format as well
-as SunOS and Solaris).
-
-@xref{shared libraries}
-
-@cindex GNU linker, porting
-The GNU linker has not been ported to as many platforms as g++ has, so you
-may be forced to use collect.
-
-If you use collect, you don't need to get something extra and figure out
-how to install it; the standard gcc installation procedure will do it for you.
-
-I used to say at this point that I don't see a clear win for either
-linking alternative, but with all the improvements in the GNU linker
-I think that it is now the better choice. Take your pick.
-
-If you run Linux, the only available linker is the GNU linker.
-
-@node Use GNU assembler?, shared libraries, use GNU linker?, installation
-@section Should I use the GNU assembler, or my vendor's assembler?
-
-@cindex Assembler
-@cindex GNU GAS
-This depends on your platform and your decision about the GNU linker. For
-most platforms, you'll need to use GAS if you use the GNU linker. For
-some platforms, you have no choice; check the gcc installation notes to
-see whether you must use GAS. But you can usually use the vendor's
-assembler if you don't use the GNU linker.
-
-The GNU assembler assembles faster than many native assemblers; however,
-on many platforms it cannot support the local debugging format.
-
-It used to be that the GNU assembler couldn't handle
-position-independent code on SunOS. This is no longer true if you
-have version 2.6 or newer.
-
-On HPUX or IRIX, you must use GAS (and configure gcc with the
-@code{--with-gnu-as} option) to debug your programs. GAS is
-strongly recommended particularly on the HP platform because of
-limitations in the HP assembler.
-
-The GNU assembler has been merged with the binutils
-distribution, so the GNU assembler and linker are now together in
-this package (as of binutils version 2.5.1).
-
-On Linux the assembler is the GNU assembler.
-
-@node shared libraries, repository, Use GNU assembler?, installation
-@section How do I build shared libraries with g++?
-
-For gcc-2.7.0 and later, building C++ shared libraries should work fine
-on supported platforms (HPUX 9+, IRIX 5+, DEC UNIX (formerly OSF/1),
-SGI/IRIX, AIX, SunOS 4, Linux/ELF and all targets using SVR4-style ELF shared
-libraries). There are two separate issues: building libg++ as a shared
-library, and making your own shared libraries. For libg++ it is simply
-a matter of giving the @code{--enable-shared} option to the configure
-program. When compiling your own code for shared libraries you
-generally
-must use the @code{-fPIC} flag to get position-independent code.
-
-@cindex -shared flag of gcc
-
-If your shared library contains global or static objects with
-constructors, then make sure to use @code{gcc -shared}, not
-@code{ld}, to create the shared library. This will make sure
-that any processor-specific magic needed to execute the constructors
-is included.
-
-In theory, constructors for objects in your shared library should be
-called when the library is opened (by dlopen or equivalent). This
-does not work on some platforms (e.g. SunOS4; it does work on Solaris
-and ELF systems such as Linux): on the broken platforms, the
-constructors are not called correctly.
-
-David Nilsen has suggested the following workaround:
-
-The thing to realize is that if you link your dynamic module with the
-@code{-shared} flag, the collect program nicely groups all the static
-ctors/dtors for you into a list and sets up a function that will call
-them (Note: this means that this trick won't work if you use the GNU
-linker without collect (@pxref{use GNU linker?}).
-
-The magic is knowing these function names. Currently, they're called:
-
-@example
-_GLOBAL__DI <-- calls all module constructors
-_GLOBAL__DD <-- calls all module destructors
-@end example
-
-[ possibly the leading underscore will differ between platforms: jbuck ]
-
-Therefore, if you make a wrapper around dlopen that looks up the
-symbol @code{_GLOBAL__DI} (or @code{__GLOBAL__DI} on SunOS4 machines), and
-calls it, you'll simulate getting the constructors called.
-
-You also need to set up the destructors to be called as well, so you
-need to put a wrapper around dlclose, which will call the
-@code{_GLOBAL__DD} function in the module when/if it's unloaded.
-
-Lastly, to get things 100% correct, you need to set up the destructors
-to also be called if the module is not unloaded, but the main program
-exits. I do this by registering a single function with @code{atexit()} that
-calls all the destructors left in dynamically loaded modules.
-
-@cindex Shared version of libg++
-Check the file @file{README.SHLIB} from the libg++ distribution for more
-about making and using shared libraries.
-
-@cindex Shared libraries with HP
-
-A patch is needed to build shared versions of version 2.7.2 of libg++
-and libstdc++ on the HP-PA architecture. You can find the patch at
-@file{ftp://ftp.cygnus.com/pub/g++/libg++-2.7.2-hppa-gcc-fix}.
-
-@node repository, repo bugs, shared libraries, installation
-@section How do I use the new repository code?
-
-@cindex repo patch
-Because there is some disagreement about the details of the template
-repository mechanism, you'll need to obtain a patch from Cygnus Support
-to enable the 2.7.2 repository code. You can obtain the patch by
-anonymous FTP: @file{ftp://ftp.cygnus.com/pub/g++/gcc-2.7.2-repo.gz}.
-
-There are patches for 2.7.0 and 2.7.1 in the same directory, though
-if you're going to rebuild the compiler you should use the latest one.
-
-@cindex repo patch for BSD
-If you're running NetBSD or BSDI, the Cygnus repo patch is not quite
-correct. Tim Liddelow has made an alternate version available at
-@file{ftp://ftp.cst.com.au/pub/gcc-2.7.2-repo-bsd.gz}.
-
-After you've applied the patch, the @code{-frepo} flag will enable the
-repository mechanism. The flag works much like the existing
-@code{-fno-implicit-templates} flag, except that auxiliary files, with
-an @file{.rpo} extension, are built that specify what template
-expansions are needed. At link time, the (patched) collect program
-detects missing templates and recompiles some of the object files
-so that the required templates are expanded.
-
-Note that the mechanism differs from that of cfront in that template
-definitions still must be visible at the point where they are to be
-expanded. No assumption is made that @file{foo.C} contains template
-definitions corresponding to template declarations in @file{foo.h}.
-
-@cindex closure with repo
-@cindex template closure
-Jason Merrill writes: ``To perform closure on a set of objects, just try
-to link them together. It will fail, but as a side effect all needed
-instances will be generated in the objects.''
-
-@node repo bugs, Use GNU C library?, repository, installation
-@section Known bugs and problems with the repo patch
-
-``The @code{-frepo} won't expand templated friend functions!''
-
-This is a known bug; currently you'll have to explicitly instantiate
-friend functions when using @code{-frepo} due to this bug (in 2.7.0
-through 2.7.2 at least).
-
-With earlier versions of the repo patch, there was a bug that happens
-when you have given a quoted command line switch, something like
-
-@example
--D'MESSAGE="hello there"'
-@end example
-
-The repo code tries to recompile files using the same flags you
-originally specified, but doesn't quote arguments that need quoting,
-resulting in failures in some cases. This is no longer a problem
-with the 2.7.2 patch.
-
-@node Use GNU C library?, Global constructor problems, repo bugs, installation
-@section Should I use the GNU C library?
-
-@cindex GNU C library
-@cindex libg++
-At this point in time, no (unless you are running Linux or the GNU Hurd
-system). The GNU C library is still very young, and
-libg++ still conflicts with it in some places. Use your native C library
-unless you know a lot about the gory details of libg++ and gnu-libc. This
-will probably change in the future.
-
-@node Global constructor problems, Strange assembler errors, Use GNU C library?, installation
-@section Global constructors aren't being called
-
-@cindex global constructors
-``I've installed gcc and it almost works, but constructors and
-destructors for global objects and objects at file scope aren't being
-called. What did I do wrong?''
-
-@cindex collect program
-It appears that you are running on a platform that requires you to
-install either "collect2" or the GNU linker, and you have done neither.
-For more information, see the section discussing the GNU linker
-(@pxref{use GNU linker?}).
-
-@cindex constructor problems on Solaris
-@cindex Solaris, constructor problems
-On Solaris 2.x, you shouldn't need a collect program and GNU ld doesn't run.
-If your global constructors aren't being called, you may need to install
-a patch, available from Sun, to fix your linker. The number of the
-``jumbo patch'' that applies is 101409-03. Thanks to Russell Street
-(r.street@@auckland.ac.nz) for this info.
-
-@cindex IRIX, installing collect
-It appears that on IRIX, the collect2 program is not being installed
-by default during the installation process, though it is required;
-you can install it manually by executing
-
-@example
-make install-collect2
-@end example
-
-from the gcc source directory after installing the compiler. (I'm
-not certain for which versions of gcc this problem occurs, and whether
-it is still present).
-
-@node Strange assembler errors, Other problems building libg++, Global constructor problems, installation
-@section Strange assembler errors when linking C++ programs
-
-``I've installed gcc and it seemed to go OK, but when I attempt to link
-any C++ program, I'm getting strange errors from the assembler! How
-can that be?''
-
-The messages in question might look something like
-
-@example
-as: "/usr/tmp/cca14605.s", line 8: error: statement syntax
-as: "/usr/tmp/cca14605.s", line 14: error: statement syntax
-@end example
-
-(on a Sun, different on other platforms). The important thing is that
-the errors come out at the link step, @emph{not} when a C++ file is
-being compiled.
-
-@cindex nm program
-@cindex GNU nm program
-Here's what's going on: the collect2 program uses the Unix ``nm''
-program to obtain a list of symbols for the global constructors and
-destructors, and it builds a little assembly language module that
-will permit them all to be called. If you're seeing this symptom,
-you have an old version of GNU nm somewhere on your path. This old
-version prints out symbol names in a format that the collect2 program
-does not expect, so bad assembly code is generated.
-
-The solution is either to remove the old version of GNU nm from your
-path (and that of everyone else who uses g++), or to install a newer
-version (it is part of the GNU "binutils" package). Recent versions
-of GNU nm do not have this problem.
-
-@node Other problems building libg++, More size_t problems, Strange assembler errors, installation
-@section Other problems building libg++
-@cindex libg++ on Ultrix
-@cindex libg++ on SunOS
-
-``I am having trouble building libg++. Help!''
-
-On some platforms (for example, Ultrix), you may see errors complaining
-about being unable to open dummy.o. On other platforms (for example,
-SunOS), you may see problems having to do with the type of size_t.
-The fix for these problems is to make libg++ by saying "make CC=gcc".
-According to Per Bothner, it should no longer be necessary to specify
-"CC=gcc" for libg++-2.3.1 or later.
-
-``I built and installed libg++, but g++ can't find it. Help!''
-
-The string given to @file{configure} that identifies your system must
-be the same when you install libg++ as it was when you installed gcc.
-Also, if you used the @code{--prefix} option to install gcc somewhere
-other than @file{/usr/local}, you must use the same value for
-@code{--prefix} when installing libg++, or else g++ will not be able
-to find libg++.
-
-@cindex patch for libg++-2.6.2
-
-The toplevel Makefile in the libg++ 2.6.2 distribution is broken, which
-along with a bug in g++ 2.6.3 causes problems linking programs that use the
-libstdc++ complex classes. A patch for this is available from
-@file{ftp://ftp.cygnus.com//pub/g++/libg++-2.6.2-fix.gz}.
-
-@node More size_t problems, Rebuild libg++?, Other problems building libg++, installation
-@section But I'm @emph{still} having problems with @code{size_t}!
-
-@cindex Type of size_t
-``I did all that, and I'm @emph{still} having problems with disagreeing
-definitions of size_t, SIZE_TYPE, and the type of functions like
-@code{strlen}.''
-
-@cindex _G_config.h
-The problem may be that you have an old version of @file{_G_config.h}
-lying around. As of libg++ version 2.4, @file{_G_config.h}, since it is
-platform-specific, is inserted into a different directory; most include
-files are in @file{$prefix/lib/g++-include}, but this file now lives in
-@file{$prefix/$arch/include}. If, after upgrading your libg++, you find that
-there is an old copy of @file{_G_config.h} left around, remove it,
-otherwise g++ will find the old one first.
-
-@node Rebuild libg++?, co-existing versions, More size_t problems, installation
-@section Do I need to rebuild libg++ to go with my new g++?
-
-``After I upgraded g++ to the latest version, I'm seeing undefined
-symbols.''
-
-or
-
-``If I upgrade to a new version of g++, do I need to reinstall libg++?''
-
-@cindex Incompatibilities between g++ versions
-
-As a rule, the first two digits of your g++ and libg++ should be the
-same. Normally when you do an upgrade in the ``minor version number''
-(2.5.7 to 2.5.8, say) there isn't a need to rebuild libg++, but there
-have been a couple of exceptions in the past.
-
-@node co-existing versions, Installing on Linux, Rebuild libg++?, installation
-@section I want several versions of g++ and libg++ to co-exist.
-
-I recommend against using the @code{-V} flag to make multiple versions
-of gcc/g++ co-exist, unless they are different minor releases that can use
-the same compiled version of libg++. The reason is that all these
-versions will try to use the same libg++ version, which usually will
-not work.
-
-Instead, use the @code{--prefix} flag when configuring gcc. Use a
-different value of @code{--prefix} for each gcc version. Use the
-same value of @code{--prefix} when configuring libg++. You can then
-have any number of co-existing gcc/libg++ pairs. Symbolic links can
-be used so that users don't need to put all these different directories
-on their paths.
-
-One possible system to use is to set @code{--prefix} to
-@file{/usr/local/gcc-2.x.y} for version 2.x.y of gcc, and to link
-whichever version of gcc you wish to be the default into
-@file{/usr/local/bin/gcc} and @file{/usr/local/bin/g++}.
-
-@node Installing on Linux, Linux Slackware 3.0, co-existing versions, installation
-@section Trouble installing g++ and libg++ on Linux
-
-``I've downloaded the latest g++ and libg++ and I'm trying to install
-them on Linux, and I'm having lots of problems.''
-
-@cindex Linux
-FSF releases of libg++ won't install on Linux unchanged, since Linux
-uses are part of the libio library from libg++ for its standard C
-library, only this is changed in a way that it clashes with libg++.
-This means that you'll need a patched version of libg++ for it to
-work.
-
-If you want to upgrade to a new gcc/libg++ combination, the easiest
-thing to do is to grab the prebuilt versions of gcc and libg++ for Linux
-from @file{ftp://tsx-11.mit.edu/pub/linux/packages/GCC}. Follow the
-directions carefully. If you want to build from source, you'll need
-a patch for libg++; the Linux developers have named the patched libg++
-version libg++-2.7.1.3 and there is a patch file in the above-named
-directory.
-
-See @file{http://sunsite.unc.edu/LDP/HOWTO/GCC-HOWTO.html},
-the Linux GCC HOWTO, for more on gcc/g++ and Linux.
-
-Linux is in the process of switching over to the GNU C library, version
-2, which will become Linux libc version 6. Once this process is
-complete, there's a good chance that the installation process on Linux
-will be smoother, but only experts should try making this new library
-work at this point.
-
-@node Linux Slackware 3.0, , Installing on Linux, installation
-@section Problems with g++ on Linux Slackware 3.0
-
-@cindex Slackware
-@cindex Linux Slackware
-``When I try to compile the traditional Hello, world program on Linux,
-the compiler can't find @file{iostream.h}. What's the deal?''
-
-You probably have the Slackware 3.0 release. There's an error in the
-setup. It's easy to fix, though; log in as root, and make a symbolic
-link:
-
-@example
-ln -s /usr/lib/g++-include /usr/include/g++
-@end example
-
-@node evolution, User Problems, installation, Top
-@chapter The Evolution of g++
-
-This chapter discusses the evolution of g++ and describes what can be expected
-in the future.
-
-@menu
-* version 2.7.x:: What's changed in 2.7.x from earlier versions
-* libstdc++::
-@end menu
-
-@node version 2.7.x, libstdc++, evolution, evolution
-@section What's new in version 2.7.x of gcc/g++
-
-[ This section is old now, since 2.8.x/egcs is the new stuff ] The
-latest 2.7.x version was 2.7.2.2, released February 10, 1997. The only
-change between 2.7.2.1 and 2.7.2.2 is that support was added for using
-the GNU C library, version 2, on Linux; users not interested in that
-functionality have no reason to upgrade. The previous version of
-gcc/g++ was 2.7.2.1, released August 14, 1996. The libg++ version that
-should be used with any 2.7.x gcc/g++ is 2.7.2, released July 4, 1996.
-
-Note that gcc 2.7.2.1 just consists of several small patches to
-gcc-2.7.2. The release is mainly
-intended to fix platform-specific bugs and does not affect the C++
-``front end'' of the compiler (the part that parses your C++ code).
-
-The 2.7.x releases represent a great deal of work on the part of the g++
-maintainers to fix outstanding bugs and move the compiler closer to the
-current ANSI/ISO standards committee's working paper, including
-supporting many of the new features that have been added to the
-language. I recommend that everyone read the NEWS file contained in the
-distribution (and that system administrators make the file available to
-their users). I've borrowed liberally from this file here.
-
-@cindex C++ working paper
-If any features seem unfamiliar, you will probably want to
-look at the recently-released public review copy of the C++ Working
-Paper. A new draft, dated 2 December 1996, has been released for
-public comment. You can find it on the web at
-@file{http://www.cygnus.com/misc/wp/} or
-@file{http://www.maths.warwick.ac.uk/c++/pub/wp/html/cd2/}.
-See
-@file{http://www.setech.com/x3.html}
-or
-@file{http://www.maths.warwick.ac.uk/c++/pub/} to download the
-document in PostScript, PDF (Adobe Acrobat), HTML, or ASCII
-form.
-
-Here are the main points:
-
-@itemize @bullet
-@item
-@cindex for scope
-As described above, the scope of variables declared in the
-initialization part of a for statement has been changed; such variables
-are now visible only in the loop body. Use @code{-fno-for-scope} to get
-the old behavior. You'll need this flag to build groff version 1.09,
-Ptolemy, and many other free software packages.
-
-@item
-@cindex vtable duplication
-Code that does not use #pragma interface/implementation will most
-likely shrink dramatically, as g++ now only emits the vtable for a
-class in the translation unit where its first non-inline, non-abstract
-virtual function is defined.
-
-@item
-@cindex automatic template instantiation
-Support for automatic template instantiation has @emph{not} been enabled
-in the official distribution, due to a disagreement over design philosophies.
-But you can get a patch from Cygnus to turn it on; retrieve the patch
-from @file{ftp://ftp.cygnus.com/pub/g++/gcc-2.7.2-repo.gz} to patch
-gcc-2.7.2 (there are also patches for earlier gcc versions).
-
-@item
-@cindex exception handling, 2.7.0
-
-@xref{exceptions}
-
-@item
-@cindex run-time type identification
-Support for Run-Time Type Identification has been added with @code{-frtti}.
-This support is still in alpha; one major restriction is that any file
-compiled with @code{-frtti} must include @code{<typeinfo>} (@emph{not}
-@code{typeinfo.h} as the NEWS file says).
-Also, all C++ code you link with (including libg++) has to be built with
-@code{-frtti}, so it's still tricky to use.
-
-@item
-@cindex compiler-generated operators
-Synthesis of compiler-generated constructors, destructors and
-assignment operators is now deferred until the functions are used.
-
-@item
-@cindex assignment in conditional expressions
-The parsing of expressions such as @code{a ? b : c = 1}
-has changed from
-@code{(a ? b : c) = 1} to @code{a ? b : (c = 1)}. This is a new C/C++
-incompatibility brought to you by the ANSI/ISO standards committee.
-
-@item
-@cindex new operator keywords
-The operator keywords and, and_eq, bitand, bitor, compl, not, not_eq,
-or, or_eq, xor and xor_eq are now supported. Use @code{-ansi} or
-@code{-foperator-names} to enable them.
-
-@item
-@cindex explicit keyword
-The @code{explicit} keyword is now supported. @code{explicit} is used to mark
-constructors and type conversion operators that should not be used
-implicitly.
-
-@item
-@cindex user-defined type conversion
-Handling of user-defined type conversion has been improved.
-
-@item
-@cindex explicit template instantiation
-Explicit instantiation of template methods is now supported. Also,
-@code{inline template class foo<int>;}
-can be used to emit only the vtable
-for a template class.
-
-@item
-@cindex -fcheck-new
-With -fcheck-new, g++ will check the return value of all calls to
-operator new, and not attempt to modify a returned null pointer.
-
-@item
-collect2 now demangles linker output, and c++filt has become part of
-the gcc distribution.
-
-@item
-Improvements to template instantiation: only members actually used
-are instantiated. (Actually this is not quite true: some inline
-templates that are not successfully inlined may be expanded even
-though they are not needed).
-
-@end itemize
-
-@node libstdc++, , version 2.7.x, evolution
-@section The GNU Standard C++ Library
-
-The GNU Standard C++ Library (also called the ``GNU ANSI C++ Library''
-in places in the code) is not libg++, though it is included in the
-libg++ distribution. Rather, it contains classes and functions
-required by the ANSI/ISO standard. The copyright conditions are the
-same as those for for the iostreams classes; the LGPL is not used
-(@pxref{legalities}).
-
-This library, libstdc++, is in the libg++ distribution in versions 2.6.2
-and later. It requires at least gcc 2.6.3 to build the libg++-2.6.2
-version; use at least gcc 2.7.0 to build the libg++ 2.7.0 version. It
-contains a hacked-up version of HP's implementation of the Standard
-Template Library (@pxref{Standard Template Library}). I've
-successfully used this Standard Template Library version to build
-a number of the demos you'll see on various web pages.
-
-As of version 2.7.0, the streams classes are now in libstdc++ instead of
-libg++, and libiostream is being phased out (don't use it). The g++
-program searches this library.
-
-The maintainers of libg++ have de-emphasized work on the older libg++ classes
-in favor of enhancing libstdc++ to cover the full language, so while libg++
-will always be available, enhancements to it should not be expected.
-
-@node User Problems, legalities, evolution, Top
-@chapter User Problems
-
-@menu
-* missing virtual table::
-* for scope::
-* const constructor::
-* unused parameter warnings::
-* jump crosses initialization::
-* Demangler::
-* static data members::
-* internal compiler error::
-* bug reports::
-* porting to g++::
-* name mangling::
-* problems linking with other libraries::
-* documentation::
-* templates::
-* undefined templates::
-* redundant templates::
-* Standard Template Library::
-* STL and string::
-* exceptions::
-* namespaces::
-* agreement with standards::
-* compiling standard libraries::
-* debugging on SVR4 systems::
-* debugging problems on Solaris::
-* X11 conflicts with libg++::
-* assignment to streams::
-@end menu
-
-@node missing virtual table, for scope, User Problems, User Problems
-@section Linker complains about missing virtual table
-
-``I'm getting a message complaining about an undefined virtual table. Is
-this a compiler bug?''
-
-(On platforms that run neither collect nor the GNU linker, like Solaris,
-you may see an odd undefined symbol like "_vt.3foo", where foo is a
-class name).
-
-This is probably because you are missing a definition for the first
-(non-inline) virtual function of the class. Since gcc-2.7.0, g++ uses
-a trick borrowed from cfront: the .o file containing the definition for
-the first non-inline virtual function for the class will also contain
-the virtual function table.
-
-@node for scope, const constructor, missing virtual table, User Problems
-@section gcc-2.7.0 breaks declarations in "for" statements!
-
-@cindex declarations in for statements
-@cindex for statements: declarations
-
-gcc-2.7.0 implements the new ANSI/ISO rule on the scope of variables
-declared in for loops.
-
-@example
-for (int i = 1; i <= 10; i++) @{
- // do something here
-@}
-foo(i);
-@end example
-
-In the above example, most existing C++ compilers would pass the
-value 11 to the function @code{foo}. In gcc 2.7 and in the ANSI/ISO
-working paper, the scope of @code{i} is only the for loop body, so
-this is an error. So that old code can be compiled, the new gcc has
-a flag @code{-fno-for-scope} that causes the old rule to be used.
-@cindex -fno-for-scope
-
-As of 2.7.1, the compiler attempts to issue warnings about code that
-has different meanings under the two sets of rules, but the code is
-not perfect: the intent was that code that has valid, but different,
-meanings under the ARM rules and the working paper rules would give
-warnings but have the new behavior, and this doesn't seem to happen.
-
-The @code{-ffor-scope} flag under 2.7.1 and 2.7.2 gives the 2.7.0 behavior.
-
-@node const constructor, unused parameter warnings, for scope, User Problems
-@section g++ seems to want a const constructor. What's that?
-
-gcc-2.7.1 introduced a bug that causes the compiler to ask for a
-const constructor (there's no such thing in C++) in certain situations
-where a const object appears in a template class. Most cases have been
-fixed in gcc-2.7.2, but unfortunately not all. Still, if you're running
-gcc-2.7.1 and have this problem, upgrade to 2.7.2; it is a vast improvement.
-
-@cindex ObjectSpace<STL>
-
-The default constructor for the template @code{pair} in ObjectSpace's
-implementation of STL triggers the bug in one place, for gcc 2.7.2. If
-you're using ObjectSpace<STL> and having this problem, simply
-change the default constructor from
-
-@example
-os_pair () : first (T1 ()), second (T2 ()) @{@}
-@end example
-
-to just
-
-@example
-os_pair () @{@}
-@end example
-
-Once this is done, ObjectSpace<STL> works fairly well.
-
-@node unused parameter warnings, jump crosses initialization, const constructor, User Problems
-@section How to silence ``unused parameter'' warnings
-
-@cindex -Wall
-@cindex -Wunused
-
-``When I use @code{-Wall} (or @code{-Wunused}), g++ warns about
-unused parameters. But the parameters have to be there, for use
-in derived class functions. How do I get g++ to stop complaining?''
-
-The answer is to simply omit the names of the unused parameters when
-defining the function. This makes clear, both to g++ and to readers
-of your code, that the parameter is unused. For example:
-
-@example
-int Foo::bar(int arg) @{ return 0; @}
-@end example
-
-will give a warning for the unused parameter @code{arg}. To suppress
-the warning write
-
-@example
-int Foo::bar(int) @{ return 0; @}
-@end example
-
-@node jump crosses initialization, Demangler, unused parameter warnings, User Problems
-@section g++ objects to a declaration in a case statement
-
-``The compiler objects to my declaring a variable in one of the branches
-of a case statement. Earlier versions used to accept this code. Why?''
-
-The draft standard does not allow a goto or a jump to a case label to
-skip over an initialization of a variable or a class object. For
-example:
-
-@example
-switch ( i ) @{
- case 1:
- Object obj(0);
- ...
- break;
- case 2:
- ...
- break;
-@}
-@end example
-
-The reason is that @code{obj} is also in scope in the rest of the switch
-statement.
-
-As of version 2.7.0, the compiler will object that the jump to the
-second case level crosses the initialization of @code{obj}. Older
-compiler versions would object only if class Object has a destructor.
-In either case, the solution is to add a set of curly braces around
-the case branch:
-
-@example
- case 1:
- @{
- Object obj(0);
- ...
- break;
- @}
-@end example
-
-@node Demangler, static data members, jump crosses initialization, User Problems
-@section Where can I find a demangler?
-
-@cindex demangler program
-A g++-compatible demangler named @code{c++filt} can be found in the
-@file{binutils} distribution. This distribution (which also contains
-the GNU linker) can be found at any GNU archive site.
-
-As of version 2.7.0, @code{c++filt} is included with gcc and is
-installed automatically. Even better, it is used by the @code{collect}
-linker, so you don't see mangled symbols anymore (except on platforms
-that use neither collect nor the GNU linker, like Solaris).
-
-@node static data members, internal compiler error, Demangler, User Problems
-@section Linker reports undefined symbols for static data members
-
-@cindex Static data members
-``g++ reports undefined symbols for all my static data members when I link,
-even though the program works correctly for compiler XYZ. What's going on?''
-
-The problem is almost certainly that you don't give definitions for
-your static data members. If you have
-
-@example
-class Foo @{
- ...
- void method();
- static int bar;
-@};
-@end example
-
-you have only declared that there is an int named Foo::bar and a member
-function named Foo::method that is defined somewhere. You still need to
-define @emph{both} method() and bar in some source file. According to
-the draft ANSI standard, you must supply an initializer, such as
-
-@example
-int Foo::bar = 0;
-@end example
-
-@noindent
-in one (and only one) source file.
-
-@node internal compiler error, bug reports, static data members, User Problems
-@section What does ``Internal compiler error'' mean?
-
-It means that the compiler has detected a bug in itself. Unfortunately,
-g++ still has many bugs, though it is a lot better than it used to be.
-If you see this message, please send in a complete bug report (see next
-section).
-
-@node bug reports, porting to g++, internal compiler error, User Problems
-@section I think I have found a bug in g++.
-
-@cindex Bug in g++, newly found
-``I think I have found a bug in g++, but I'm not sure. How do I know,
-and who should I tell?''
-
-@cindex Manual, for gcc
-First, see the excellent section on bugs and bug reports in the gcc manual
-(which is included in the gcc distribution). As a short summary of that
-section: if the compiler gets a fatal signal, for any input, it's a bug
-(newer versions of g++ will ask you to send in a bug report when they
-detect an error in themselves). Same thing for producing invalid
-assembly code.
-
-When you report a bug, make sure to describe your platform (the type of
-computer, and the version of the operating system it is running) and the
-version of the compiler that you are running. See the output of the
-command @code{g++ -v} if you aren't sure. Also provide enough code
-so that the g++ maintainers can duplicate your bug. Remember that the
-maintainers won't have your header files; one possibility is to send
-the output of the preprocessor (use @code{g++ -E} to get this). This
-is what a ``complete bug report'' means.
-
-I will add some extra notes that are C++-specific, since the notes from
-the gcc documentation are generally C-specific.
-
-@cindex g++ bug report
-First, mail your bug report to "bug-g++@@prep.ai.mit.edu". You may also
-post to @file{gnu.g++.bug}, but it's better to use mail, particularly if you
-have any doubt as to whether your news software generates correct reply
-addresses. Don't mail C++ bugs to bug-gcc@@prep.ai.mit.edu.
-
-@strong{News:} as I write this (late February 1996) the gateway
-connecting the bug-g++ mailing list and the @file{gnu.g++.bug} newsgroup
-is (temporarily?) broken. Please mail, do not post bug reports.
-
-@cindex libg++ bug report
-If your bug involves libg++ rather than the compiler, mail to
-bug-lib-g++@@prep.ai.mit.edu. If you're not sure, choose one, and if you
-guessed wrong, the maintainers will forward it to the other list.
-
-@cindex C++, reference books
-@cindex ARM [Annotated C++ Ref Manual]
-Second, if your program does one thing, and you think it should do
-something else, it is best to consult a good reference if in doubt.
-The standard reference is the draft working paper from the ANSI/ISO
-C++ standardization committee, which you can get on the net.
-For PostScript and PDF (Adobe Acrobat) versions, see the
-archive at @file{ftp://research.att.com/dist/stdc++/WP}. For HTML and ASCII
-versions, see @file{ftp://ftp.cygnus.com/pub/g++}. On the World Wide Web, see
-@file{http://www.cygnus.com/misc/wp/}.
-
-An older
-standard reference is "The Annotated C++ Reference Manual", by Ellis and
-Stroustrup (copyright 1990, ISBN #0-201-51459-1). This is what they're
-talking about on the net when they refer to ``the ARM''. But you should
-know that vast changes have been made to the language since then.
-
-The ANSI/ISO C++ standards committee have adopted some changes to the
-C++ language since the publication of the original ARM, and newer
-versions of g++ (2.5.x and later) support some of these changes, notably
-the mutable keyword (added in 2.5.0), the bool type (added in 2.6.0),
-and changes in the scope of variables defined in for statements (added
-in 2.7.0).
-You can obtain an addendum to the ARM explaining many of these changes by FTP
-from @file{ftp://ftp.std.com/AW/stroustrup2e/new_iso.ps}.
-
-@cindex AT&T cfront
-Note that the behavior of (any version of) AT&T's "cfront" compiler is
-NOT the standard for the language.
-
-@node porting to g++, name mangling, bug reports, User Problems
-@section Porting programs from other compilers to g++
-
-``I have a program that runs on <some other C++ compiler>, and I want
-to get it running under g++. Is there anything I should watch out
-for?''
-
-@cindex Porting to g++
-
-Note that g++ supports many of the newer keywords that have recently
-been added to the language. Your other C++ compiler may not support
-them, so you may need to rename variables and members that conflict
-with these keywords.
-
-There are two other reasons why a program that worked under one compiler
-might fail under another: your program may depend on the order of
-evaluation of side effects in an expression, or it may depend on the
-lifetime of a temporary (you may be assuming that a temporary object
-"lives" longer than the standard guarantees). As an example of the
-first:
-
-@example
-void func(int,int);
-
-int i = 3;
-func(i++,i++);
-@end example
-
-@cindex Order of evaluation, problems in porting
-Novice programmers think that the increments will be evaluated in strict
-left-to-right order. Neither C nor C++ guarantees this; the second
-increment might happen first, for example. func might get 3,4, or it
-might get 4,3.
-
-@cindex Classes, problems in porting
-@cindex Problems in porting, class
-The second problem often happens with classes like the libg++ String
-class. Let's say I have
-
-@example
-String func1();
-void func2(const char*);
-@end example
-
-and I say
-
-@example
-func2(func1());
-@end example
-
-because I know that class String has an "operator const char*". So what
-really happens is
-
-@example
-func2(func1().convert());
-@end example
-
-@cindex temporaries
-where I'm pretending I have a convert() method that is the same as the
-cast. This is unsafe in g++ versions before 2.6.0, because the
-temporary String object may be deleted after its last use (the call to
-the conversion function), leaving the pointer pointing to garbage, so by
-the time func2 is called, it gets an invalid argument.
-
-@cindex ANSI draft standard
-Both the cfront and the old g++ behaviors are legal according to the ARM,
-but the powers that be have decided that compiler writers were given
-too much freedom here.
-
-The ANSI C++ committee has now come to a resolution of the lifetime of
-temporaries problem: they specify that temporaries should be deleted at
-end-of-statement (and at a couple of other points). This means that g++
-versions before 2.6.0 now delete temporaries too early, and cfront
-deletes temporaries too late. As of version 2.6.0, g++ does things
-according to the new standard.
-
-@cindex Scope, problems in porting
-@cindex Problems in porting, scope
-For now, the safe way to write such code is to give the temporary a name,
-which forces it to live until the end of the scope of the name. For
-example:
-
-@example
-String& tmp = func1();
-func2(tmp);
-@end example
-
-Finally, like all compilers (but especially C++ compilers, it seems),
-g++ has bugs, and you may have tweaked one. If so, please file a bug
-report (after checking the above issues).
-
-@node name mangling, problems linking with other libraries, porting to g++, User Problems
-@section Why does g++ mangle names differently from other C++ compilers?
-
-See the answer to the next question.
-@cindex Mangling names
-
-@node problems linking with other libraries, documentation, name mangling, User Problems
-@section Why can't g++ code link with code from other C++ compilers?
-
-``Why can't I link g++-compiled programs against libraries compiled by
-some other C++ compiler?''
-
-@cindex Mangling names
-@cindex Cygnus Support
-Some people think that,
-if only the FSF and Cygnus Support folks would stop being
-stubborn and mangle names the same way that, say, cfront does, then any
-g++-compiled program would link successfully against any cfront-compiled
-library and vice versa. Name mangling is the least of the problems.
-Compilers differ as to how objects are laid out, how multiple inheritance
-is implemented, how virtual function calls are handled, and so on, so if
-the name mangling were made the same, your programs would link against
-libraries provided from other compilers but then crash when run. For this
-reason, the ARM @emph{encourages} compiler writers to make their name mangling
-different from that of other compilers for the same platform.
-Incompatible libraries are then detected at link time, rather than at run
-time.
-@cindex ARM [Annotated C++ Ref Manual]
-@cindex Compiler differences
-
-@node documentation, templates, problems linking with other libraries, User Problems
-@section What documentation exists for g++ 2.x?
-
-@cindex g++, documentation
-Relatively little.
-While the gcc manual that comes with the distribution has some coverage
-of the C++ part of the compiler, it focuses mainly on the C compiler
-(though the information on the ``back end'' pertains to C++ as well).
-Still, there is useful information on the command line options and the
-#pragma interface and #pragma implementation directives in the manual,
-and there is a useful section on template instantiation in the 2.6 version.
-There is a Unix-style manual entry, "g++.1", in the gcc-2.x
-distribution; the information here is a subset of what is in the manual.
-
-You can buy a nicely printed and bound copy of this manual from the FSF;
-see above for ordering information.
-
-A draft of a document describing the g++ internals appears in the gcc
-distribution (called g++int.texi); it is incomplete but gives lots of
-information.
-
-For class libraries, there are several resources available:
-
-@itemize @bullet
-@item
-The libg++ distribution has a manual
-@file{libg++/libg++.texi} describing the old libg++ classes, and
-another manual @file{libio/iostream.texi} describing the iostreams
-implementation.
-@item
-While there is no libg++-specific document describing the STL
-implementation, SGI's web site, at
-@file{http://www.sgi.com/Technology/STL/}, is an excellent resource.
-Note that the SGI version of STL is the one that is included with the
-egcs and 2.8.x releases of g++/libstdc++.
-
-@end itemize
-
-@node templates, undefined templates, documentation, User Problems
-@section Problems with the template implementation
-
-@cindex g++, template support
-@cindex Templates
-
-g++ does not implement a separate pass to instantiate template functions
-and classes at this point; for this reason, it will not work, for the most
-part, to declare your template functions in one file and define them in
-another. The compiler will need to see the entire definition of the
-function, and will generate a static copy of the function in each file
-in which it is used.
-
-(The experimental template repository code (@pxref{repository}) that
-can be added to 2.7.0 or later does implement a separate pass, but there
-is still no searching of files that the compiler never saw).
-
-As of 2.8.x and egcs-1.0.x, the template implementation has most
-of the features specified in the draft standard. Still missing are
-template arguments that are themselves templates; however, template
-class member functions work, and most of the limitations of the older
-g++ versions are fixed.
-
-I think that given this new implementation, it should not be necessary
-for users to mess around with switches like @code{-fno-implicit-templates}
-and @code{#pragma} directives; most of the time, the default behavior
-will work OK. Users of older versions might want to read on.
-
-@cindex -fno-implicit-templates
-For version 2.6.0, however, a new switch @code{-fno-implicit-templates}
-was added; with this switch, templates are expanded only under user
-control. I recommend that all g++ users that use templates read the
-section ``Template Instantiation'' in the gcc manual (version 2.6.x
-and newer). g++ now supports explicit template expansion using the
-syntax from the latest C++ working paper:
-
-@example
-template class A<int>;
-template ostream& operator << (ostream&, const A<int>&);
-@end example
-
-@cindex template limitations
-As of version 2.7.2, there are still a few limitations in the template
-implementation besides the above (thanks to Jason Merrill for this info):
-
-@strong{Note}: these problems are eliminated in egcs and in gcc-2.8.x.
-
-@enumerate 1
-@item
-Static data member templates are not supported in compiler versions older
-than 2.8.0. You can work around
-this by explicitly declaring the static variable for each template
-specialization:
-
-@example
-template <class T> struct A @{
- static T t;
-@};
-
-template <class T> T A<T>::t = 0; // gets bogus error
-int A<int>::t = 0; // OK (workaround)
-@end example
-
-@item
-Template member names are not available when defining member function
-templates.
-
-@example
-template <class T> struct A @{
- typedef T foo;
- void f (foo);
- void g (foo arg) @{ ... @}; // this works
-@};
-
-template <class T> void A<T>::f (foo) @{ @} // gets bogus error
-@end example
-
-@item
-Templates are instantiated using the parser. This results in two
-problems (again, these problems are fixed in 2.8.0 and egcs):
-
-a) Class templates are instantiated in some situations where such
-instantiation should not occur.
-
-@example
-template <class T> class A @{ @};
-A<int> *aip = 0; // should not instantiate A<int> (but does)
-@end example
-
-b) Function templates cannot be inlined at the site of their
-instantiation.
-
-@example
-template <class T> inline T min (T a, T b) @{ return a < b ? a : b; @}
-
-void f () @{
- int i = min (1, 0); // not inlined
-@}
-
-void g () @{
- int j = min (1, 0); // inlined
-@}
-@end example
-
-A workaround that works in version 2.6.1 through 2.7.2.x is to specify
-
-@example
-extern template int min (int, int);
-@end example
-
-before @code{f()}; this will force it to be instantiated (though not
-emitted).
-
-@strong{Note:} this kind of ``guiding declaration'' is not standard and
-isn't supported by egcs or gcc-2.8.x, as the standard says that this
-declares a ``normal'' @code{min} function which has no relation to
-the template function @code{min<int>(int,int)}. But then the new
-compilers have no problem inlining template functions.
-
-@item
-Member function templates are always instantiated when their containing
-class is. This is wrong (fixed in egcs/2.8).
-@end enumerate
-
-@node undefined templates, redundant templates, templates, User Problems
-@section I get undefined symbols when using templates
-
-(Thanks to Jason Merrill for this section).
-
-@cindex template instantiation
-g++ does not automatically instantiate templates defined in other files.
-Because of this, code written for cfront will often produce undefined
-symbol errors when compiled with g++. You need to tell g++ which template
-instances you want, by explicitly instantiating them in the file where they
-are defined. For instance, given the files
-
-@file{templates.h}:
-@example
-template <class T>
-class A @{
-public:
- void f ();
- T t;
-@};
-
-template <class T> void g (T a);
-@end example
-
-@file{templates.cc}:
-@example
-#include "templates.h"
-
-template <class T>
-void A<T>::f () @{ @}
-
-template <class T>
-void g (T a) @{ @}
-@end example
-
-
-main.cc:
-@example
-#include "templates.h"
-
-main ()
-@{
- A<int> a;
- a.f ();
- g (a);
-@}
-@end example
-
-compiling everything with @code{g++ main.cc templates.cc} will result in
-undefined symbol errors for @samp{A<int>::f ()} and @samp{g (A<int>)}. To
-fix these errors, add the lines
-
-@example
-template class A<int>;
-template void g (A<int>);
-@end example
-
-to the bottom of @samp{templates.cc} and recompile.
-
-@node redundant templates, Standard Template Library, undefined templates, User Problems
-@section I get multiply defined symbols using templates
-
-You may be running into a bug that was introduced in version 2.6.1
-(and is still present in 2.6.3) that generated external linkage
-for templates even when neither @code{-fexternal-templates} nor
-@code{-fno-implicit-templates} is specified. There is a patch for
-this problem at @*
-@file{ftp://ftp.cygnus.com/pub/g++/gcc-2.6.3-template-fix}.
-
-I recommend either applying the patch or
-using @code{-fno-implicit-templates}
-together with explicit template instantiation as described in previous
-sections.
-
-This bug is fixed in 2.7.0.
-
-@node Standard Template Library, STL and string, redundant templates, User Problems
-@section Does g++ support the Standard Template Library?
-
-If you want to use the Standard Template Library, do not pass go,
-upgrade immediately to gcc-2.8.x or to egcs. The new C++ front end
-handles STL very well, and the high-quality implementation of STL
-from SGI is included verbatim as part of the libstdc++ class library.
-
-If for some reason you must use 2.7.2, you can probably get by with
-the hacked-up version of the old implementation from HP that is
-included with libg++-2.7.2, but it is definitely inferior and has more
-problems. Alternatively, g++ 2.7.2.x users might try the following:
-a group at the Moscow Center for Sparc Technology has
-a port of the SGI STL implementation that mostly works with gcc-2.7.2.
-See
-@file{http://www.ipmce.su/people/fbp/stl/stlport.html}.
-
-Mumit Khan has produced an ``STL newbie guide'' with lots of information
-on using STL with gcc. See
-
-@file{http://www.xraylith.wisc.edu/~khan/software/stl/STL.newbie.html}
-
-@node STL and string, exceptions, Standard Template Library, User Problems
-@section I'm having problems mixing STL and the standard string class
-
-[ This section is for g++ 2.7.2.x users only ]
-
-This is due to a bug in g++ version 2.7.2 and 2.7.2.1; the compiler
-is confused by the operator declarations. There is an easy workaround,
-however; just make sure that the @code{<string>} header is included
-before any STL headers. That is, just say
-
-@example
-#include <string>
-@end example
-
-before any other @code{#include} directives.
-
-Unfortunately, this doesn't solve all problems; you may still have
-difficulty with the relational operators !=, <=, >, and >=, thanks
-to a conflict with the very general definition of these operators
-in function.h. One trick that sometimes works is to try to use ==
-and < in your code instead of the other operators. Another is to
-use a derived class of <string>. The only completely satisfactory
-solution, I'm afraid, is to wait for the new release.
-
-@node exceptions, namespaces, STL and string, User Problems
-@section Problems and limitations with exceptions
-
-The first really usable exceptions implementations are in 2.8.x and
-egcs. With these versions, exceptions are enabled by default; use
--fno-exceptions to disable exceptions.
-
-However, 2.8.1 still has not integrated egcs work that computes an
-accurate control flow graph in the presence of exceptions. For this
-reason, you will sometimes get bogus warnings when compiling with 2.8.1,
--O, and -Wall, about uninitialized variables and the like.
-
-2.7.2.x has very limited and partially broken support for exceptions.
-With that compiler, you must
-provide the @code{-fhandle-exceptions} flag to enable exception
-handling. In version 2.7.2 and older, exceptions may not work properly
-(and you may get odd error messages when compiling) if you turn
-on optimization (the @code{-O} flag). If you care about exceptions,
-please upgrade to a newer compiler!
-
-In 2.7.2, you must give the @code{-frtti} switch to enable catching
-of derived exception objects with handlers for the base exception class;
-if @code{-frtti} is not given, only exact type matching works.
-
-For exception handling to work with 2.7.0 your CPU must be a SPARC,
-RS6000/PowerPC, 386/486/Pentium, or ARM. Release 2.7.1 added support
-for the Alpha, and ``m68k is rumored to work on some platforms''
-and ``VAX may also work'' (according to Mike Stump).
-@emph{It still doesn't work on HP-PA or MIPS platforms.}
-
-Exception handling adds space overhead (the size of the executable
-grows); the problem is worse on the ix86 (Intel-like) architecture
-than on RISC architectures. The extra exceptions code is generated
-in a separate program section and is only paged in if an exception
-is thrown, so the cost is in disk, not in RAM or CPU.
-
-Exception overhead is much lower on ix86 if you use binutils 2.9 or
-later, as gas (the GNU assembler) can now compress the information.
-
-@node namespaces, agreement with standards, exceptions, User Problems
-@section Does g++ support namespaces?
-
-As of version 2.7.2, g++ recognizes the keywords @code{namespace} and
-@code{using}, and there is some rudimentary code present, but almost
-nothing connected with namespaces works yet.
-The new versions (2.8.x/egcs) still lack namespace support, but to help
-compile standard programs they make
-
-@example
-using namespace std;
-@end example
-
-a no-op. There is namespace implementation work going on in the egcs
-snapshots (but it hasn't been released yet).
-
-@node agreement with standards, compiling standard libraries, namespaces, User Problems
-@section What are the differences between g++ and the ARM specification of C++?
-
-@cindex ARM [Annotated C++ Ref Manual]
-@cindex exceptions
-
-Up until recently, there was no really usable exception support. If you
-need exceptions, you want gcc-2.8.x or egcs. The implementation works
-fairly well. The 2.7.x version was strictly alpha quality and quite
-fragile.
-
-@cindex mutable
-Some features that the ANSI/ISO standardization committee has voted in
-that don't appear in the ARM are supported, notably the @code{mutable}
-keyword, in version 2.5.x. 2.6.x added support for the built-in boolean
-type @code{bool}, with constants @code{true} and @code{false}. Run-time
-type identification was rudimentary in 2.7.x but is fully supported in
-2.8.x, so there are
-more reserved words: @code{typeid}, @code{static_cast},
-@code{reinterpret_cast}, @code{const_cast}, and @code{dynamic_cast}.
-
-@cindex g++ bugs
-As with any beta-test compiler, there are bugs. You can help improve
-the compiler by submitting detailed bug reports.
-
-[ This paragraph obsoleted by 2.8.x/egcs: ]
-One of the weakest areas of g++ other than templates is the resolution
-of overloaded functions and operators in complex cases. The usual
-symptom is that in a case where the ARM says that it is ambiguous which
-function should be chosen, g++ chooses one (often the first one
-declared). This is usually not a problem when porting C++ code from
-other compilers to g++, but shows up as errors when code developed under
-g++ is ported to other compilers. (I believe this is no longer a
-significant problem in 2.7.0 or later).
-
-[A full bug list would be very long indeed, so I won't put one here;
-the sheer complexity of the C++ language means that every compiler I've
-tried has some problems. 2.8.x and egcs are a big improvement]
-
-@node compiling standard libraries, debugging on SVR4 systems, agreement with standards, User Problems
-@section Will g++ compile InterViews? The NIH class library? Rogue Wave?
-
-@cindex NIH class library
-@cindex NIHCL with g++
-The NIH class library uses a non-portable, compiler-dependent hack
-to initialize itself, which makes life difficult for g++ users.
-It will not work without modification, and I don't know what modifications
-are required or whether anyone has done them successfully.
-
-In short, it's not going to happen any time soon (previous FAQs referred
-to patches that a new NIHCL release would hopefully contain, but this
-hasn't happened).
-
-@strong{Note:} I thought I saw an item indicating that someone
-@emph{had} patched NIHCL to work with g++. Any pointers?
-
-@cindex InterViews
-I think that as of version 2.5.6, the standard g++ will compile the
-standard 3.1 InterViews completely successfully.
-Note that you'll need the @code{-fno-for-scope} flag
-if you use gcc-2.7.0; with 2.7.2 you may be able to omit this flag
-but you'll get warnings.
-
-@cindex Rogue Wave
-According to Jason Merrill, gcc-2.7.0 and newer works with Rogue
-Wave's @code{tools.h++} class library, but you may want to grab
-@file{ftp://ftp.cygnus.com/pub/g++/Tools.h++-6.1-patch}. Again,
-you'll need the @code{-fno-for-scope} flag since Rogue Wave hasn't
-fixed their code to comply with the new standard yet.
-
-@node debugging on SVR4 systems, debugging problems on Solaris, compiling standard libraries, User Problems
-@section Debugging on SVR4 systems
-@cindex System VR4, debugging
-
-``How do I get debugging to work on my System V Release 4 system?''
-
-@cindex DWARF debug format
-
-Most systems based on System V Release 4 (except Solaris) encode symbolic
-debugging information in a format known as `DWARF'. There are two forms
-of DWARF, DWARF 1 and DWARF 2. The default is often DWARF 1, which is
-not really expressive enough to do C++ correctly.
-
-Now that we have gdb 4.17, DWARF debugging is finally supported (if
-you use gcc 2.8.1 or egcs-1.0.x or newer).
-
-@cindex stabs
-@cindex --with-stabs
-
-For users of older versions of the tools, you @emph{can} get g++ debugging under SVR4 systems by
-configuring gcc with the @code{--with-stabs} option. This causes gcc to
-use an alternate debugging format, one more like that used under SunOS4.
-You won't need to do anything special to GDB; it will always understand
-the ``stabs'' format.
-
-To specify DWARF 2 output on Unixware, you can give the @code{-ggdb}
-switch; alternatively, @code{-gstabs} produces ``stabs'' format.
-
-@node debugging problems on Solaris, X11 conflicts with libg++, debugging on SVR4 systems, User Problems
-@section debugging problems on Solaris
-
-``I'm on Solaris, and gdb says it doesn't know about some of my local
-symbols. Help!''
-
-This problem was introduced in gcc 2.7.2; debug symbols for
-locals that aren't declared at the beginning of a block come out in the
-wrong order, and gdb can't find such symbols.
-
-This problem is fixed in gcc-2.7.2.1.
-
-@node X11 conflicts with libg++, assignment to streams, debugging problems on Solaris, User Problems
-@section X11 conflicts with libg++ in definition of String
-@cindex String, conflicts in definition
-
-``X11 and Motif define String, and this conflicts with the String class
-in libg++. How can I use both together?''
-
-One possible method is the following:
-
-@example
-#define String XString
-#include <X11/Intrinsic.h>
-/* include other X11 and Motif headers */
-#undef String
-@end example
-
-and remember to use the correct @code{String} or @code{XString} when
-you declare things later.
-
-@node assignment to streams, , X11 conflicts with libg++, User Problems
-@section Why can't I assign one stream to another?
-
-[ Thanks to Per Bothner and Jerry Schwarz for this section. ]
-
-Assigning one stream to another seems like a reasonable thing to do, but
-it's a bad idea. Usually, this comes up because people want to assign
-to @code{cout}. This is poor style, especially for libraries, and is
-contrary to good object-oriented design. (Libraries that write directly
-to @code{cout} are less flexible, modular, and object-oriented).
-
-The iostream classes do not allow assigning to arbitrary streams, because
-this can violate typing:
-
-@example
-ifstream foo ("foo");
-istrstream str(...);
-foo = str;
-foo->close (); /* Oops! Not defined for istrstream! */
-@end example
-
-@cindex assignment to cout
-
-The original cfront implementation of iostreams by Jerry Schwarz allows
-you to assign to @code{cin}, @code{cout}, @code{cerr}, and @code{clog},
-but this is not part of the draft standard for iostreams and generally
-isn't considered a good idea, so standard-conforming code shouldn't use
-this technique.
-
-The GNU implementation of iostream did not support assigning to
-@code{cin}, @code{cout}, @code{cerr}, and @code{clog}
-for quite a while, but it now does, for backward
-compatibility with cfront iostream (versions 2.6.1 and later of libg++).
-
-The ANSI/ISO C++ Working Paper does provide ways of changing the
-streambuf associated with a stream. Assignment isn't allowed;
-there is an explicit named member that must be used.
-
-However, it is not wise to do this, and the results are confusing. For
-example: @code{fstream::rdbuf} is supposed to return the @emph{original}
-filebuf, not the one you assigned. (This is not yet implemented in GNU
-iostream.) This must be so because @code{fstream::rdbuf} is defined to
-return a @code{filebuf *}.
-
-@node legalities, index, User Problems, Top
-@chapter What are the rules for shipping code built with g++ and libg++?
-@cindex Shipping rules
-@cindex GPL [GNU Public License]
-
-``Is it is possible to distribute programs for profit that are created
-with g++ and use the g++ libraries?''
-
-I am not a lawyer, and this is not legal advice. In any case, I have
-little interest in telling people how to violate the spirit of the
-GNU licenses without violating the letter. This section tells you
-how to comply with the intention of the GNU licenses as best I understand
-them.
-
-@cindex FSF [Free Software Foundation]
-The FSF has no objection to your making money. Its only interest is that
-source code to their programs, and libraries, and to modified versions of
-their programs and libraries, is always available.
-
-The short answer is that you do not need to release the source to
-your program, but you can't just ship a stripped executable either,
-unless you use only the subset of libg++ that includes the iostreams
-classes (see discussion below) or the new libstdc++ library (available
-in libg++ 2.6.2 and later).
-
-Compiling your code with a GNU compiler does not affect its copyright;
-it is still yours. However, in order to ship code that links in a GNU
-library such as libg++ there are certain rules you must follow. The
-rules are described in the file COPYING.LIB that accompanies gcc
-distributions; it is also included in the libg++ distribution.
-See that file for the exact rules. The agreement is called the
-Library GNU Public License or LGPL. It is much "looser" than the
-GNU Public License, or GPL, that covers must GNU programs.
-
-@cindex libg++, shipping code
-Here's the deal: let's say that you use some version of libg++,
-completely unchanged, in your software, and you want to ship only
-a binary form of your code. You can do this, but there are several
-special requirements. If you want to use libg++ but ship only object
-code for your code, you have to ship source for libg++ (or ensure
-somehow that your customer already has the source for the exact
-version you are using), and ship your application in linkable form.
-You cannot forbid your customer from reverse-engineering or extending
-your program by exploiting its linkable form.
-
-@cindex libg++, modifying
-Furthermore, if you modify libg++ itself, you must provide source
-for your modifications (making a derived class does not count as
-modifying the library -- that is "a work that uses the library").
-
-@cindex special copying conditions for iostreams
-For certain portions of libg++ that implement required parts of the C++
-language (such as iostreams and other standard classes), the FSF has
-loosened the copyright requirement still more by adding the ``special
-exception'' clause, which reads as follows:
-
-@quotation
-As a special exception, if you link this library with files
-compiled with GCC to produce an executable, this does not cause
-the resulting executable to be covered by the GNU General Public License.
-This exception does not however invalidate any other reasons why
-the executable file might be covered by the GNU General Public License.
-@end quotation
-
-If your only use of libg++ uses code with this exception, you may ship
-stripped executables or license your executables under different
-conditions without fear of violating an FSF copyright. It is the intent
-of FSF and Cygnus that, as the other classes required by the ANSI/ISO
-draft standard are developed, these will also be placed under this
-``special exception'' license.
-The code in the new libstdc++ library, intended to implement standard
-classes as defined by ANSI/ISO, is also licensed this way.
-
-To avoid coming under the influence of the LGPL, you can link with
-@file{-liostream} rather than @file{-lg++} (for version 2.6.x and
-earlier), or @file{-lstdc++} now that it is available. In version 2.7.0
-all the standard classes are in @file{-lstdc++}; you can do the link
-step with @code{c++} instead of @code{g++} to search only the
-@file{-lstdc++} library and avoid the LGPL'ed code in @file{-lg++}.
-
-Note that in egcs and in gcc-2.8.x, if you do not
-specify any libraries the @code{g++} command will only link in
-@file{-lstdc++}, so your executable will not be affected by the LGPL
-(unless you link in some other LGPLed library: the GNU C library used
-on GNU/Linux systems is one such library).
-
-If you wish to discuss legal issues connected with GNU software on the
-net, please use @file{gnu.misc.discuss}, not the technical newsgroups.
-
-@node index, , legalities, Top
-@comment node-name, next, previous, up
-@appendix Concept Index
-
-@printindex cp
-
-@page
-@contents
-@bye
diff --git a/gnu/egcs/gcc/invoke.texi b/gnu/egcs/gcc/invoke.texi
index 3f9c45ed31b..b93acd808fc 100644
--- a/gnu/egcs/gcc/invoke.texi
+++ b/gnu/egcs/gcc/invoke.texi
@@ -3,12 +3,12 @@
@c For copying conditions, see the file gcc.texi.
@node Invoking GCC
-@chapter GNU CC Command Options
-@cindex GNU CC command options
+@chapter GCC Command Options
+@cindex GCC command options
@cindex command options
-@cindex options, GNU CC command
+@cindex options, GCC command
-When you invoke GNU CC, it normally does preprocessing, compilation,
+When you invoke GCC, it normally does preprocessing, compilation,
assembly and linking. The ``overall options'' allow you to stop this
process at an intermediate stage. For example, the @samp{-c} option
says not to run the linker. Then the output consists of object files
@@ -20,7 +20,7 @@ options control the assembler and linker; most of these are not
documented here, since you rarely need to use any of them.
@cindex C compilation options
-Most of the command line options that you can use with GNU CC are useful
+Most of the command line options that you can use with GCC are useful
for C programs; when an option is only useful with another language
(usually C++), the explanation says so explicitly. If the description
for a particular option does not mention a source language, you can use
@@ -68,12 +68,12 @@ only one of these two forms, whichever one is not the default.
* Link Options:: Specifying libraries and so on.
* Directory Options:: Where to find header files and libraries.
Where to find the compiler executable files.
-* Target Options:: Running a cross-compiler, or an old version of GNU CC.
+* Target Options:: Running a cross-compiler, or an old version of GCC.
* Submodel Options:: Specifying minor hardware or convention variations,
such as 68010 vs 68020.
* Code Gen Options:: Specifying conventions for function calls, data layout
and register usage.
-* Environment Variables:: Env vars that affect GNU CC.
+* Environment Variables:: Env vars that affect GCC.
* Running Protoize:: Automatically adding or removing function prototypes.
@end menu
@@ -443,7 +443,7 @@ in the following sections.
* Link Options:: Specifying libraries and so on.
* Directory Options:: Where to find header files and libraries.
Where to find the compiler executable files.
-* Target Options:: Running a cross-compiler, or an old version of GNU CC.
+* Target Options:: Running a cross-compiler, or an old version of GCC.
@end menu
@node Overall Options
@@ -593,7 +593,7 @@ be displayed.
@cindex C++ source file suffixes
C++ source files conventionally use one of the suffixes @samp{.C},
@samp{.cc}, @samp{.cpp}, @samp{.c++}, @samp{.cp}, or @samp{.cxx};
-preprocessed C++ files use the suffix @samp{.ii}. GNU CC recognizes
+preprocessed C++ files use the suffix @samp{.ii}. GCC recognizes
files with these names and compiles them as C++ programs even if you
call the compiler the same way as for compiling C programs (usually with
the name @code{gcc}).
@@ -604,7 +604,7 @@ However, C++ programs often require class libraries as well as a
compiler that understands the C++ language---and under some
circumstances, you might want to compile programs from standard input,
or otherwise without a suffix that flags them as C++ programs.
-@code{g++} is a program that calls GNU CC with the default language
+@code{g++} is a program that calls GCC with the default language
set to C++, and automatically specifies linking against the C++
library. On many systems, the script @code{g++} is also
installed with the name @code{c++}.
@@ -631,14 +631,20 @@ from C, such as C++ and Objective C) that the compiler accepts:
@table @code
@cindex ANSI support
@item -ansi
-Support all ANSI standard C programs.
+In C mode, support all ANSI standard C programs. In C++ mode,
+remove GNU extensions that conflict with ANSI C++.
+@c shouldn't we be saying "ISO"?
-This turns off certain features of GNU C that are incompatible with ANSI
-C, such as the @code{asm}, @code{inline} and @code{typeof} keywords, and
+This turns off certain features of GCC that are incompatible with ANSI
+C (when compiling C code), or of ANSI standard C++ (when compiling C++ code),
+such as the @code{asm} and @code{typeof} keywords, and
predefined macros such as @code{unix} and @code{vax} that identify the
type of system you are using. It also enables the undesirable and
-rarely used ANSI trigraph feature, and it disables recognition of C++
-style @samp{//} comments.
+rarely used ANSI trigraph feature. For the C compiler,
+it disables recognition of C++ style @samp{//} comments as well as
+the @code{inline} keyword. For the C++ compiler,
+@samp{-foperator-names} is enabled as well.
+
The alternate keywords @code{__asm__}, @code{__extension__},
@code{__inline__} and @code{__typeof__} continue to work despite
@@ -936,7 +942,7 @@ g++ -g -frepo -O -c firstClass.C
@noindent
In this example, only @samp{-frepo} is an option meant
only for C++ programs; you can use the other options with any
-language supported by GNU CC.
+language supported by GCC.
Here is a list of options that are @emph{only} for compiling C++ programs:
@@ -1312,8 +1318,7 @@ negative form beginning @samp{-Wno-} to turn off warnings;
for example, @samp{-Wno-implicit}. This manual lists only one of the
two forms, whichever is not the default.
-These options control the amount and kinds of warnings produced by GNU
-CC:
+These options control the amount and kinds of warnings produced by GCC:
@table @code
@cindex syntax checking
@@ -1337,7 +1342,7 @@ these escape routes; application programs should avoid them.
@xref{Alternate Keywords}.
This option is not intended to be @i{useful}; it exists only to satisfy
-pedants who would otherwise claim that GNU CC fails to support the ANSI
+pedants who would otherwise claim that GCC fails to support the ANSI
standard.
Some users try to use @samp{-pedantic} to check programs for strict ANSI
@@ -1484,7 +1489,7 @@ to compute a value that itself is never used, because such
computations may be deleted by data flow analysis before the warnings
are printed.
-These warnings are made optional because GNU CC is not smart
+These warnings are made optional because GCC is not smart
enough to see all the reasons why the code might be correct
despite appearing to have an error. Here is one example of how
this can happen:
@@ -1506,7 +1511,7 @@ this can happen:
@noindent
If the value of @code{y} is always 1, 2 or 3, then @code{x} is
-always initialized, but GNU CC doesn't know this. Here is
+always initialized, but GCC doesn't know this. Here is
another common case:
@smallexample
@@ -1770,11 +1775,11 @@ Make all warnings into errors.
@end table
@node Debugging Options
-@section Options for Debugging Your Program or GNU CC
+@section Options for Debugging Your Program or GCC
@cindex options, debugging
@cindex debugging information options
-GNU CC has various special options that are used for debugging
+GCC has various special options that are used for debugging
either your program or GCC:
@table @code
@@ -1792,7 +1797,7 @@ to generate the extra information, use @samp{-gstabs+}, @samp{-gstabs},
@samp{-gxcoff+}, @samp{-gxcoff}, @samp{-gdwarf-1+}, or @samp{-gdwarf-1}
(see below).
-Unlike most other C compilers, GNU CC allows you to use @samp{-g} with
+Unlike most other C compilers, GCC allows you to use @samp{-g} with
@samp{-O}. The shortcuts taken by optimized code may occasionally
produce surprising results: some variables you declared may not exist
at all; flow of control may briefly move where you did not expect it;
@@ -1803,7 +1808,7 @@ execute in different places because they were moved out of loops.
Nevertheless it proves possible to debug optimized output. This makes
it reasonable to use the optimizer for programs that might have bugs.
-The following options are useful when GNU CC is generated with the
+The following options are useful when GCC is generated with the
capability for more than one debugging format.
@item -ggdb
@@ -1981,7 +1986,7 @@ frequencies.
@item -fprofile-arcs
Instrument @dfn{arcs} during compilation. For each function of your
-program, GNU CC creates a program flow graph, then finds a spanning tree
+program, GCC creates a program flow graph, then finds a spanning tree
for the graph. Only arcs that are not on the spanning tree have to be
instrumented: the compiler adds code to count the number of times that these
arcs are executed. When an arc is the only exit or only entrance to a
@@ -2011,7 +2016,7 @@ branch probabilities.
@need 2000
@item -ftest-coverage
Create data files for the @code{gcov} code-coverage utility
-(@pxref{Gcov,, @code{gcov}: a GNU CC Test Coverage Program}).
+(@pxref{Gcov,, @code{gcov}: a GCC Test Coverage Program}).
The data file names begin with the name of your source file:
@table @code
@@ -2115,7 +2120,7 @@ options, in particular with and without -g.
When running a cross-compiler, pretend that the target machine uses the
same floating point format as the host machine. This causes incorrect
output of the actual floating constants, but the actual instruction
-sequence will probably be the same as GNU CC would make when running on
+sequence will probably be the same as GCC would make when running on
the target machine.
@item -save-temps
@@ -2127,7 +2132,7 @@ compiling @file{foo.c} with @samp{-c -save-temps} would produce files
@item -print-file-name=@var{library}
Print the full absolute name of the library file @var{library} that
would be used when linking---and don't do anything else. With this
-option, GNU CC does not compile or link anything; it just prints the
+option, GCC does not compile or link anything; it just prints the
file name.
@item -print-prog-name=@var{program}
@@ -2191,7 +2196,7 @@ without a frame pointer. On some machines the compiler also turns
on other flags.@refill
@item -O2
-Optimize even more. GNU CC performs nearly all supported optimizations
+Optimize even more. GCC performs nearly all supported optimizations
that do not involve a space-speed tradeoff. The compiler does not
perform loop unrolling or function inlining when you specify @samp{-O2}.
As compared to @samp{-O}, this option increases both compilation time
@@ -2330,7 +2335,7 @@ callable version of the function. This switch does not affect
Emit variables declared @code{static const} when optimization isn't turned
on, even if the variables aren't referenced.
-GNU CC enables this option by default. If you want to force the compiler to
+GCC enables this option by default. If you want to force the compiler to
check if the variable was referenced, regardless of whether or not
optimization is turned on, use the @samp{-fno-keep-static-consts} option.
@@ -2411,7 +2416,7 @@ Perform a number of minor optimizations that are relatively expensive.
Attempt to reassign register numbers in move instructions and as
operands of other simple instructions in order to maximize the amount of
register tying. This is especially helpful on machines with two-operand
-instructions. GNU CC enables this optimization by default with @samp{-O2}
+instructions. GCC enables this optimization by default with @samp{-O2}
or higher.
Note @code{-fregmove} and @code{-foptimize-register-moves} are the same
@@ -2497,7 +2502,7 @@ These two options are intended to be removed someday, once
they have helped determine the efficacy of various
approaches to improving loop optimizations.
-Please let us (@code{egcs@@egcs.cygnus.com} and @code{fortran@@gnu.org})
+Please let us (@code{gcc@@gcc.gnu.org} and @code{fortran@@gnu.org})
know how use of these options affects
the performance of your production code.
We're very interested in code that runs @emph{slower}
@@ -2842,20 +2847,20 @@ mechanism when this option is specified.
@cindex unresolved references and @code{-nodefaultlibs}
One of the standard libraries bypassed by @samp{-nostdlib} and
@samp{-nodefaultlibs} is @file{libgcc.a}, a library of internal subroutines
-that GNU CC uses to overcome shortcomings of particular machines, or special
+that GCC uses to overcome shortcomings of particular machines, or special
needs for some languages.
@ifset INTERNALS
-(@xref{Interface,,Interfacing to GNU CC Output}, for more discussion of
+(@xref{Interface,,Interfacing to GCC Output}, for more discussion of
@file{libgcc.a}.)
@end ifset
@ifclear INTERNALS
-(@xref{Interface,,Interfacing to GNU CC Output,gcc.info,Porting GNU CC},
+(@xref{Interface,,Interfacing to GCC Output,gcc.info,Porting GCC},
for more discussion of @file{libgcc.a}.)
@end ifclear
In most cases, you need @file{libgcc.a} even when you want to avoid
other standard libraries. In other words, when you specify @samp{-nostdlib}
or @samp{-nodefaultlibs} you should usually specify @samp{-lgcc} as well.
-This ensures that you have no unresolved references to internal GNU CC
+This ensures that you have no unresolved references to internal GCC
library subroutines. (For example, @samp{__main}, used to ensure C++
constructors will be called; @pxref{Collect2,,@code{collect2}}.)
@@ -2880,7 +2885,7 @@ this option.
@item -Xlinker @var{option}
Pass @var{option} as an option to the linker. You can use this to
-supply system-specific linker options which GNU CC does not know how to
+supply system-specific linker options which GCC does not know how to
recognize.
If you want to pass an option that takes an argument, you must use
@@ -2995,24 +3000,24 @@ are processed in order, from left to right.
@cindex compiler version, specifying
@cindex target machine, specifying
-By default, GNU CC compiles code for the same type of machine that you
+By default, GCC compiles code for the same type of machine that you
are using. However, it can also be installed as a cross-compiler, to
compile for some other type of machine. In fact, several different
-configurations of GNU CC, for different target machines, can be
+configurations of GCC, for different target machines, can be
installed side by side. Then you specify which one to use with the
@samp{-b} option.
-In addition, older and newer versions of GNU CC can be installed side
+In addition, older and newer versions of GCC can be installed side
by side. One of them (probably the newest) will be the default, but
you may sometimes wish to use another.
@table @code
@item -b @var{machine}
The argument @var{machine} specifies the target machine for compilation.
-This is useful when you have installed GNU CC as a cross-compiler.
+This is useful when you have installed GCC as a cross-compiler.
The value to use for @var{machine} is the same as was specified as the
-machine type when configuring GNU CC as a cross-compiler. For
+machine type when configuring GCC as a cross-compiler. For
example, if a cross-compiler was configured with @samp{configure
i386v}, meaning to compile for an 80386 running System V, then you
would specify @samp{-b i386v} to run that cross compiler.
@@ -3021,17 +3026,17 @@ When you do not specify @samp{-b}, it normally means to compile for
the same type of machine that you are using.
@item -V @var{version}
-The argument @var{version} specifies which version of GNU CC to run.
+The argument @var{version} specifies which version of GCC to run.
This is useful when multiple versions are installed. For example,
-@var{version} might be @samp{2.0}, meaning to run GNU CC version 2.0.
+@var{version} might be @samp{2.0}, meaning to run GCC version 2.0.
The default version, when you do not specify @samp{-V}, is the last
-version of GNU CC that you installed.
+version of GCC that you installed.
@end table
The @samp{-b} and @samp{-V} options actually work by controlling part of
the file name used for the executable files and libraries used for
-compilation. A given version of GNU CC, for a given target machine, is
+compilation. A given version of GCC, for a given target machine, is
normally kept in the directory @file{/usr/local/lib/gcc-lib/@var{machine}/@var{version}}.@refill
Thus, sites can customize the effect of @samp{-b} or @samp{-V} either by
@@ -3248,13 +3253,13 @@ The @code{rtd} instruction is supported by the 68010, 68020, 68030,
@item -malign-int
@itemx -mno-align-int
-Control whether GNU CC aligns @code{int}, @code{long}, @code{long long},
+Control whether GCC aligns @code{int}, @code{long}, @code{long long},
@code{float}, @code{double}, and @code{long double} variables on a 32-bit
boundary (@samp{-malign-int}) or a 16-bit boundary (@samp{-mno-align-int}).
Aligning variables on 32-bit boundaries produces code that runs somewhat
faster on processors with 32-bit busses at the expense of more memory.
-@strong{Warning:} if you use the @samp{-malign-int} switch, GNU CC will
+@strong{Warning:} if you use the @samp{-malign-int} switch, GCC will
align structures containing the above types differently than
most published application binary interface specifications for the m68k.
@@ -3315,7 +3320,7 @@ cross-compilation. The embedded targets @samp{sparc-*-aout} and
@samp{-msoft-float} changes the calling convention in the output file;
therefore, it is only useful if you compile @emph{all} of a program with
this option. In particular, you need to compile @file{libgcc.a}, the
-library that comes with GNU CC, with @samp{-msoft-float} in order for
+library that comes with GCC, with @samp{-msoft-float} in order for
this to work.
@item -mhard-quad-float
@@ -3360,7 +3365,7 @@ instructions (except for leaf functions) and is the normal mode of operation.
@itemx -munaligned-doubles
Assume that doubles have 8 byte alignment. This is the default.
-With @samp{-munaligned-doubles}, GNU CC assumes that doubles have 8 byte
+With @samp{-munaligned-doubles}, GCC assumes that doubles have 8 byte
alignment only if they are contained in another type, or if they have an
absolute address. Otherwise, it assumes they have 4 byte alignment.
Specifying this option avoids some rare compatibility problems with code
@@ -3382,7 +3387,7 @@ divide instructions which exist in SPARC v8 but not in SPARC v7.
multiply, integer divide step and scan (@code{ffs}) instructions which
exist in SPARClite but not in SPARC v7.
-These options are deprecated and will be deleted in GNU CC 2.9.
+These options are deprecated and will be deleted in a future GCC release.
They have been replaced with @samp{-mcpu=xxx}.
@item -mcypress
@@ -3397,7 +3402,7 @@ With @samp{-msupersparc} the compiler optimizes code for the SuperSparc cpu, as
used in the SparcStation 10, 1000 and 2000 series. This flag also enables use
of the full SPARC v8 instruction set.
-These options are deprecated and will be deleted in GNU CC 2.9.
+These options are deprecated and will be deleted in a future GCC release.
They have been replaced with @samp{-mcpu=xxx}.
@item -mcpu=@var{cpu_type}
@@ -3511,7 +3516,7 @@ Programs are statically linked, PIC is not supported.
@item -mstack-bias
@itemx -mno-stack-bias
-With @samp{-mstack-bias}, GNU CC assumes that the stack pointer, and
+With @samp{-mstack-bias}, GCC assumes that the stack pointer, and
frame pointer if present, are offset by -2047 which must be added back
when making stack frame references.
Otherwise, assume no such offset is present.
@@ -3678,7 +3683,7 @@ not pass @samp{-assert pure-text} to the linker when linking a shared object.
@item -msoft-float
@kindex -msoft-float
Generate output containing library calls for floating point.
-@strong{Warning:} the requisite libraries are not part of GNU CC.
+@strong{Warning:} the requisite libraries are not part of GCC.
Normally the facilities of the machine's usual C compiler are used, but
this can't be done directly in cross-compilation. You must make your
own arrangements to provide suitable library functions for
@@ -3787,7 +3792,7 @@ cross-compilation.
@samp{-msoft-float} changes the calling convention in the output file;
therefore, it is only useful if you compile @emph{all} of a program with
this option. In particular, you need to compile @file{libgcc.a}, the
-library that comes with GNU CC, with @samp{-msoft-float} in order for
+library that comes with GCC, with @samp{-msoft-float} in order for
this to work.
@item -mlittle-endian
@@ -4130,7 +4135,7 @@ Control how function arguments are stored in stack frames.
@samp{-moptimize-arg-area} saves space by optimizing them, but this
conflicts with the 88open specifications. The opposite alternative,
@samp{-mno-optimize-arg-area}, agrees with 88open standards. By default
-GNU CC does not optimize the argument area.
+GCC does not optimize the argument area.
@item -mshort-data-@var{num}
@kindex -mshort-data-@var{num}
@@ -4190,7 +4195,7 @@ Which variant of the assembler syntax to emit.
@samp{-msvr4} makes the C preprocessor recognize @samp{#pragma weak}
that is used on System V release 4.
@item
-@samp{-msvr4} makes GNU CC issue additional declaration directives used in
+@samp{-msvr4} makes GCC issue additional declaration directives used in
SVr4.
@end enumerate
@@ -4261,7 +4266,7 @@ particular, the behavior of such a division with and without
@cindex bit shift overflow (88k)
@cindex large bit shifts (88k)
Include code to detect bit-shifts of more than 31 bits; respectively,
-trap such shifts or emit code to handle them properly. By default GNU CC
+trap such shifts or emit code to handle them properly. By default GCC
makes no special provision for large bit shifts.
@item -mwarn-passed-structs
@@ -4270,7 +4275,7 @@ makes no special provision for large bit shifts.
Warn when a function passes a struct as an argument or result.
Structure-passing conventions have changed during the evolution of the C
language, and are often the source of portability problems. By default,
-GNU CC issues no such warning.
+GCC issues no such warning.
@end table
@node RS/6000 and PowerPC Options
@@ -4298,7 +4303,7 @@ These @samp{-m} options are defined for the IBM RS/6000 and PowerPC:
@kindex -mpowerpc-gpopt
@kindex -mpowerpc-gfxopt
@kindex -mpowerpc64
-GNU CC supports two related instruction set architectures for the
+GCC supports two related instruction set architectures for the
RS/6000 and PowerPC. The @dfn{POWER} instruction set are those
instructions supported by the @samp{rios} chip set used in the original
RS/6000 systems and the @dfn{PowerPC} instruction set is the
@@ -4311,36 +4316,36 @@ register is included in processors supporting the POWER architecture.
You use these options to specify which instructions are available on the
processor you are using. The default value of these options is
-determined when configuring GNU CC. Specifying the
+determined when configuring GCC. Specifying the
@samp{-mcpu=@var{cpu_type}} overrides the specification of these
options. We recommend you use the @samp{-mcpu=@var{cpu_type}} option
rather than the options listed above.
-The @samp{-mpower} option allows GNU CC to generate instructions that
+The @samp{-mpower} option allows GCC to generate instructions that
are found only in the POWER architecture and to use the MQ register.
-Specifying @samp{-mpower2} implies @samp{-power} and also allows GNU CC
+Specifying @samp{-mpower2} implies @samp{-power} and also allows GCC
to generate instructions that are present in the POWER2 architecture but
not the original POWER architecture.
-The @samp{-mpowerpc} option allows GNU CC to generate instructions that
+The @samp{-mpowerpc} option allows GCC to generate instructions that
are found only in the 32-bit subset of the PowerPC architecture.
Specifying @samp{-mpowerpc-gpopt} implies @samp{-mpowerpc} and also allows
-GNU CC to use the optional PowerPC architecture instructions in the
+GCC to use the optional PowerPC architecture instructions in the
General Purpose group, including floating-point square root. Specifying
-@samp{-mpowerpc-gfxopt} implies @samp{-mpowerpc} and also allows GNU CC to
+@samp{-mpowerpc-gfxopt} implies @samp{-mpowerpc} and also allows GCC to
use the optional PowerPC architecture instructions in the Graphics
group, including floating-point select.
-The @samp{-mpowerpc64} option allows GNU CC to generate the additional
+The @samp{-mpowerpc64} option allows GCC to generate the additional
64-bit instructions that are found in the full PowerPC64 architecture
-and to treat GPRs as 64-bit, doubleword quantities. GNU CC defaults to
+and to treat GPRs as 64-bit, doubleword quantities. GCC defaults to
@samp{-mno-powerpc64}.
-If you specify both @samp{-mno-power} and @samp{-mno-powerpc}, GNU CC
+If you specify both @samp{-mno-power} and @samp{-mno-powerpc}, GCC
will use only the instructions in the common subset of both
architectures plus some special AIX common-mode calls, and will not use
the MQ register. Specifying both @samp{-mpower} and @samp{-mpowerpc}
-permits GNU CC to use any instruction from either architecture and to
+permits GCC to use any instruction from either architecture and to
allow use of the MQ register; specify this for the Motorola MPC601.
@item -mnew-mnemonics
@@ -4352,10 +4357,10 @@ Select which mnemonics to use in the generated assembler code.
defined for the PowerPC architecture, while @samp{-mold-mnemonics}
requests the assembler mnemonics defined for the POWER architecture.
Instructions defined in only one architecture have only one mnemonic;
-GNU CC uses that mnemonic irrespective of which of these options is
+GCC uses that mnemonic irrespective of which of these options is
specified.
-GNU CC defaults to the mnemonics appropriate for the architecture in
+GCC defaults to the mnemonics appropriate for the architecture in
use. Specifying @samp{-mcpu=@var{cpu_type}} sometimes overrides the
value of these option. Unless you are building a cross-compiler, you
should normally not specify either @samp{-mnew-mnemonics} or
@@ -4408,9 +4413,9 @@ enable the @samp{-mpowerpc} option and disable the @samp{-mpower} option.
AIX versions 4 or greater selects @samp{-mcpu=common} by default, so
that code will operate on all members of the RS/6000 and PowerPC
-families. In that case, GNU CC will use only the instructions in the
+families. In that case, GCC will use only the instructions in the
common subset of both architectures plus some special AIX common-mode
-calls, and will not use the MQ register. GNU CC assumes a generic
+calls, and will not use the MQ register. GCC assumes a generic
processor model for scheduling purposes.
Specifying any of the options @samp{-mcpu=rios1}, @samp{-mcpu=rios2},
@@ -4439,25 +4444,25 @@ instruction scheduling parameters.
@kindex -mminimal-toc
Modify generation of the TOC (Table Of Contents), which is created for
every executable file. The @samp{-mfull-toc} option is selected by
-default. In that case, GNU CC will allocate at least one TOC entry for
-each unique non-automatic variable reference in your program. GNU CC
+default. In that case, GCC will allocate at least one TOC entry for
+each unique non-automatic variable reference in your program. GCC
will also place floating-point constants in the TOC. However, only
16,384 entries are available in the TOC.
If you receive a linker error message that saying you have overflowed
the available TOC space, you can reduce the amount of TOC space used
with the @samp{-mno-fp-in-toc} and @samp{-mno-sum-in-toc} options.
-@samp{-mno-fp-in-toc} prevents GNU CC from putting floating-point
-constants in the TOC and @samp{-mno-sum-in-toc} forces GNU CC to
+@samp{-mno-fp-in-toc} prevents GCC from putting floating-point
+constants in the TOC and @samp{-mno-sum-in-toc} forces GCC to
generate code to calculate the sum of an address and a constant at
run-time instead of putting that sum into the TOC. You may specify one
-or both of these options. Each causes GNU CC to produce very slightly
+or both of these options. Each causes GCC to produce very slightly
slower and larger code at the expense of conserving TOC space.
If you still run out of space in the TOC even when you specify both of
these options, specify @samp{-mminimal-toc} instead. This option causes
-GNU CC to make only one TOC entry for every file. When you specify this
-option, GNU CC will produce code that is slower and larger but which
+GCC to make only one TOC entry for every file. When you specify this
+option, GCC will produce code that is slower and larger but which
uses extremely little TOC space. You may wish to use this option
only on files that contain less frequently executed code. @refill
@@ -4469,7 +4474,7 @@ Enable AIX 64-bit ABI and calling convention: 64-bit pointers, 64-bit
@code{long} type, and the infrastructure needed to support them.
Specifying @samp{-maix64} implies @samp{-mpowerpc64} and
@samp{-mpowerpc}, while @samp{-maix32} disables the 64-bit ABI and
-implies @samp{-mno-powerpc64}. GNU CC defaults to @samp{-maix32}.
+implies @samp{-mno-powerpc64}. GCC defaults to @samp{-maix32}.
@item -mxl-call
@itemx -mno-xl-call
@@ -4508,7 +4513,7 @@ option are incompatible.
@kindex -msoft-float
Generate code that does not use (uses) the floating-point register set.
Software floating point emulation is provided if you use the
-@samp{-msoft-float} option, and pass the option to GNU CC when linking.
+@samp{-msoft-float} option, and pass the option to GCC when linking.
@item -mmultiple
@itemx -mno-multiple
@@ -4932,7 +4937,7 @@ prevents compilation.
@item -msoft-float
Generate output containing library calls for floating point.
-@strong{Warning:} the requisite libraries are not part of GNU CC.
+@strong{Warning:} the requisite libraries are not part of GCC.
Normally the facilities of the machine's usual C compiler are used, but
this can't be done directly in cross-compilation. You must make your
own arrangements to provide suitable library functions for
@@ -5076,7 +5081,7 @@ comparison is unordered.
@item -msoft-float
Generate output containing library calls for floating point.
-@strong{Warning:} the requisite libraries are not part of GNU CC.
+@strong{Warning:} the requisite libraries are not part of GCC.
Normally the facilities of the machine's usual C compiler are used, but
this can't be done directly in cross-compilation. You must make your
own arrangements to provide suitable library functions for
@@ -5106,7 +5111,7 @@ also use the @samp{-ffast-math} switch.
@item -malign-double
@itemx -mno-align-double
-Control whether GNU CC aligns @code{double}, @code{long double}, and
+Control whether GCC aligns @code{double}, @code{long double}, and
@code{long long} variables on a two word boundary or a one word
boundary. Aligning @code{double} variables on a two word boundary will
produce code that runs somewhat faster on a @samp{Pentium} at the
@@ -5118,13 +5123,13 @@ the published application binary interface specifications for the 386.
@item -msvr3-shlib
@itemx -mno-svr3-shlib
-Control whether GNU CC places uninitialized locals into @code{bss} or
+Control whether GCC places uninitialized locals into @code{bss} or
@code{data}. @samp{-msvr3-shlib} places these locals into @code{bss}.
These options are meaningful only on System V Release 3.
@item -mno-wide-multiply
@itemx -mwide-multiply
-Control whether GNU CC uses the @code{mul} and @code{imul} that produce
+Control whether GCC uses the @code{mul} and @code{imul} that produce
64 bit results in @code{eax:edx} from 32 bit operands to do @code{long
long} multiplies and 32-bit division by constants.
@@ -5316,7 +5321,7 @@ does provide software floating point support.
@samp{-msoft-float} changes the calling convention in the output file;
therefore, it is only useful if you compile @emph{all} of a program with
this option. In particular, you need to compile @file{libgcc.a}, the
-library that comes with GNU CC, with @samp{-msoft-float} in order for
+library that comes with GCC, with @samp{-msoft-float} in order for
this to work.
@end table
@@ -5535,7 +5540,7 @@ rounding towards plus infinity. Thus, unless your program modifies the
In the Alpha architecture, floating point traps are imprecise. This
means without software assistance it is impossible to recover from a
floating trap and program execution normally needs to be terminated.
-GNU CC can generate code that can assist operating system trap handlers
+GCC can generate code that can assist operating system trap handlers
in determining the exact location that caused a floating point trap.
Depending on the requirements of an application, different levels of
precisions can be selected:
@@ -5566,12 +5571,12 @@ generated assembly file. Under DEC Unix, this has the effect that
IEEE-conformant math library routines will be linked in.
@item -mbuild-constants
-Normally GNU CC examines a 32- or 64-bit integer constant to
+Normally GCC examines a 32- or 64-bit integer constant to
see if it can construct it from smaller constants in two or three
instructions. If it cannot, it will output the constant as a literal and
generate code to load it from the data segment at runtime.
-Use this option to require GNU CC to construct @emph{all} integer constants
+Use this option to require GCC to construct @emph{all} integer constants
using code, even if it takes more instructions (the maximum is six).
You would typically use this option to build a shared library dynamic
@@ -5589,19 +5594,19 @@ assembler (@samp{-malpha-as}) or by the GNU assembler @samp{-mgas}.
@itemx -mno-cix
@itemx -mmax
@itemx -mno-max
-Indicate whether GNU CC should generate code to use the optional BWX,
+Indicate whether GCC should generate code to use the optional BWX,
CIX, and MAX instruction sets. The default is to use the instruction sets
supported by the CPU type specified via @samp{-mcpu=} option or that
-of the CPU on which GNU CC was built if none was specified.
+of the CPU on which GCC was built if none was specified.
@item -mcpu=@var{cpu_type}
Set the instruction set, register set, and instruction scheduling
parameters for machine type @var{cpu_type}. You can specify either the
-@samp{EV} style name or the corresponding chip number. GNU CC
+@samp{EV} style name or the corresponding chip number. GCC
supports scheduling parameters for the EV4 and EV5 family of processors
and will choose the default values for the instruction set from
the processor you specify. If you do not specify a processor type,
-GNU CC will default to the processor on which the compiler was built.
+GCC will default to the processor on which the compiler was built.
Supported values for @var{cpu_type} are
@@ -6122,7 +6127,7 @@ programs that don't use exception handling.
Return ``short'' @code{struct} and @code{union} values in memory like
longer ones, rather than in registers. This convention is less
efficient, but it has the advantage of allowing intercallability between
-GNU CC-compiled files and files compiled with other compilers.
+GCC-compiled files and files compiled with other compilers.
The precise convention for returning structures in memory depends
on the target configuration macros.
@@ -6136,9 +6141,9 @@ returned in registers when possible. This is more efficient for small
structures than @samp{-fpcc-struct-return}.
If you specify neither @samp{-fpcc-struct-return} nor its contrary
-@samp{-freg-struct-return}, GNU CC defaults to whichever convention is
-standard for the target. If there is no standard convention, GNU CC
-defaults to @samp{-fpcc-struct-return}, except on targets where GNU CC
+@samp{-freg-struct-return}, GCC defaults to whichever convention is
+standard for the target. If there is no standard convention, GCC
+defaults to @samp{-fpcc-struct-return}, except on targets where GCC
is the principal compiler. In those cases, we can choose the standard,
and we chose the more efficient register return alternative.
@@ -6174,7 +6179,7 @@ destructors) in the form used by the GNU linker (on systems where the GNU
linker is the standard method of handling them). Use this option when
you want to use a non-GNU linker, which also requires using the
@code{collect2} program to make sure the system linker includes
-constructors and destructors. (@code{collect2} is included in the GNU CC
+constructors and destructors. (@code{collect2} is included in the GCC
distribution.) For systems which @emph{must} use @code{collect2}, the
compiler driver @code{gcc} is configured to do this automatically.
@@ -6200,7 +6205,7 @@ Consider all memory references through pointers to be volatile.
@item -fvolatile-global
Consider all memory references to extern and global data items to
-be volatile. GNU CC does not consider static data items to be volatile
+be volatile. GCC does not consider static data items to be volatile
because of this switch.
@item -fvolatile-static
@@ -6213,7 +6218,7 @@ Generate position-independent code (PIC) suitable for use in a shared
library, if supported for the target machine. Such code accesses all
constant addresses through a global offset table (GOT). The dynamic
loader resolves the GOT entries when the program starts (the dynamic
-loader is not part of GNU CC; it is part of the operating system). If
+loader is not part of GCC; it is part of the operating system). If
the GOT size for the linked executable exceeds a machine-specific
maximum size, you get an error message from the linker indicating that
@samp{-fpic} does not work; in that case, recompile with @samp{-fPIC}
@@ -6221,7 +6226,7 @@ instead. (These maximums are 16k on the m88k, 8k on the Sparc, and 32k
on the m68k and RS/6000. The 386 has no such limit.)
Position-independent code requires special support, and therefore works
-only on certain machines. For the 386, GNU CC supports PIC for System V
+only on certain machines. For the 386, GCC supports PIC for System V
but not for the Sun 386i. Code generated for the IBM RS/6000 is always
position-independent.
@@ -6281,7 +6286,7 @@ not want to use this option, since it makes the code suboptimal, and
the offsets of structure members won't agree with system libraries.
@item -fcheck-memory-usage
-Generate extra code to check each memory access. GNU CC will generate
+Generate extra code to check each memory access. GCC will generate
code that is suitable for a detector of bad memory accesses such as
@file{Checker}.
@@ -6296,7 +6301,7 @@ If you do not, you might get erroneous messages from the detector.
If you use functions from a library that have side-effects (such as
@code{read}), you might not be able to recompile the library and
specify this option. In that case, you can enable the
-@samp{-fprefix-function-name} option, which requests GNU CC to encapsulate
+@samp{-fprefix-function-name} option, which requests GCC to encapsulate
your code and make other functions look as if they were compiled with
@samp{-fcheck-memory-usage}. This is done by calling ``stubs'',
which are provided by the detector. If you cannot find or build
@@ -6322,8 +6327,8 @@ These calls would be similar to those done in the stubs described above.
@c should be documented!
@item -fprefix-function-name
-Request GNU CC to add a prefix to the symbols generated for function names.
-GNU CC adds a prefix to the names of functions defined as well as
+Request GCC to add a prefix to the symbols generated for function names.
+GCC adds a prefix to the names of functions defined as well as
functions called. Code compiled with this option and code compiled
without the option can't be linked together, unless stubs are used.
@@ -6338,7 +6343,7 @@ foo (int a)
@end example
@noindent
-GNU CC will compile the code as if it was written:
+GCC will compile the code as if it was written:
@example
extern void prefix_bar (int);
void
@@ -6419,11 +6424,11 @@ option, and that not all targets provide complete support for it.
@end table
@node Environment Variables
-@section Environment Variables Affecting GNU CC
+@section Environment Variables Affecting GCC
@cindex environment variables
-This section describes several environment variables that affect how GNU
-CC operates. Some of them work by specifying directories or prefixes to use
+This section describes several environment variables that affect how GCC
+operates. Some of them work by specifying directories or prefixes to use
when searching for various kinds of files. Some are used to specify other
aspects of the compilation environment.
@@ -6431,15 +6436,15 @@ aspects of the compilation environment.
Note that you can also specify places to search using options such as
@samp{-B}, @samp{-I} and @samp{-L} (@pxref{Directory Options}). These
take precedence over places specified using environment variables, which
-in turn take precedence over those specified by the configuration of GNU
-CC.
+in turn take precedence over those specified by the configuration of GCC.
+
@end ifclear
@ifset INTERNALS
Note that you can also specify places to search using options such as
@samp{-B}, @samp{-I} and @samp{-L} (@pxref{Directory Options}). These
take precedence over places specified using environment variables, which
-in turn take precedence over those specified by the configuration of GNU
-CC. @xref{Driver}.
+in turn take precedence over those specified by the configuration of GCC.
+@xref{Driver}.
@end ifset
@table @code
@@ -6460,16 +6465,16 @@ CC. @xref{Driver}.
@c @findex LC_TIME
@findex LC_ALL
@cindex locale
-These environment variables control the way that GNU CC uses
-localization information that allow GNU CC to work with different
-national conventions. GNU CC inspects the locale categories
+These environment variables control the way that GCC uses
+localization information that allow GCC to work with different
+national conventions. GCC inspects the locale categories
@code{LC_CTYPE} and @code{LC_MESSAGES} if it has been configured to do
so. These locale categories can be set to any value supported by your
installation. A typical value is @samp{en_UK} for English in the United
Kingdom.
The @code{LC_CTYPE} environment variable specifies character
-classification. GNU CC uses it to determine the character boundaries in
+classification. GCC uses it to determine the character boundaries in
a string; this is needed for some multibyte encodings that contain quote
and escape characters that would otherwise be interpreted as a string
end or escape.
@@ -6480,13 +6485,13 @@ use in diagnostic messages.
If the @code{LC_ALL} environment variable is set, it overrides the value
of @code{LC_CTYPE} and @code{LC_MESSAGES}; otherwise, @code{LC_CTYPE}
and @code{LC_MESSAGES} default to the value of the @code{LANG}
-environment variable. If none of these variables are set, GNU CC
+environment variable. If none of these variables are set, GCC
defaults to traditional C English behavior.
@item TMPDIR
@findex TMPDIR
If @code{TMPDIR} is set, it specifies the directory to use for temporary
-files. GNU CC uses temporary files to hold the output of one stage of
+files. GCC uses temporary files to hold the output of one stage of
compilation which is to be used as input to the next stage: for example,
the output of the preprocessor, which is the input to the compiler
proper.
@@ -6498,7 +6503,7 @@ names of the subprograms executed by the compiler. No slash is added
when this prefix is combined with the name of a subprogram, but you can
specify a prefix that ends with a slash if you wish.
-If GNU CC cannot find the subprogram using the specified prefix, it
+If GCC cannot find the subprogram using the specified prefix, it
tries looking in the usual places for the subprogram.
The default value of @code{GCC_EXEC_PREFIX} is
@@ -6513,9 +6518,9 @@ used for linking.
In addition, the prefix is used in an unusual way in finding the
directories to search for header files. For each of the standard
directories whose name normally begins with @samp{/usr/local/lib/gcc-lib}
-(more precisely, with the value of @code{GCC_INCLUDE_DIR}), GNU CC tries
+(more precisely, with the value of @code{GCC_INCLUDE_DIR}), GCC tries
replacing that beginning with the specified prefix to produce an
-alternate directory name. Thus, with @samp{-Bfoo/}, GNU CC will search
+alternate directory name. Thus, with @samp{-Bfoo/}, GCC will search
@file{foo/bar} where it would normally search @file{/usr/local/lib/bar}.
These alternate directories are searched first; the standard directories
come next.
@@ -6523,7 +6528,7 @@ come next.
@item COMPILER_PATH
@findex COMPILER_PATH
The value of @code{COMPILER_PATH} is a colon-separated list of
-directories, much like @code{PATH}. GNU CC tries the directories thus
+directories, much like @code{PATH}. GCC tries the directories thus
specified when searching for subprograms, if it can't find the
subprograms using @code{GCC_EXEC_PREFIX}.
@@ -6531,9 +6536,9 @@ subprograms using @code{GCC_EXEC_PREFIX}.
@findex LIBRARY_PATH
The value of @code{LIBRARY_PATH} is a colon-separated list of
directories, much like @code{PATH}. When configured as a native compiler,
-GNU CC tries the directories thus specified when searching for special
+GCC tries the directories thus specified when searching for special
linker files, if it can't find them using @code{GCC_EXEC_PREFIX}. Linking
-using GNU CC also uses these directories when searching for ordinary
+using GCC also uses these directories when searching for ordinary
libraries for the @samp{-l} option (but directories specified with
@samp{-L} come first).
@@ -6546,7 +6551,7 @@ libraries for the @samp{-l} option (but directories specified with
@c @itemx OBJCPLUS_INCLUDE_PATH
These environment variables pertain to particular languages. Each
variable's value is a colon-separated list of directories, much like
-@code{PATH}. When GNU CC searches for header files, it tries the
+@code{PATH}. When GCC searches for header files, it tries the
directories listed in the variable for the language you are using, after
the directories specified with @samp{-I} but before the standard header
file directories.
@@ -6639,9 +6644,9 @@ original source file. The original file is renamed to a name ending
with @samp{.save}. If the @samp{.save} file already exists, then
the source file is simply discarded.
-@code{protoize} and @code{unprotoize} both depend on GNU CC itself to
+@code{protoize} and @code{unprotoize} both depend on GCC itself to
scan the program and collect information about the functions it uses.
-So neither of these programs will work until GNU CC is installed.
+So neither of these programs will work until GCC is installed.
Here is a table of the options you can use with @code{protoize} and
@code{unprotoize}. Each option works with both programs unless