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Diffstat (limited to 'gnu/usr.bin/gcc/README.X11')
| -rw-r--r-- | gnu/usr.bin/gcc/README.X11 | 447 |
1 files changed, 447 insertions, 0 deletions
diff --git a/gnu/usr.bin/gcc/README.X11 b/gnu/usr.bin/gcc/README.X11 new file mode 100644 index 00000000000..359dd5f9603 --- /dev/null +++ b/gnu/usr.bin/gcc/README.X11 @@ -0,0 +1,447 @@ +[This file contains two alternative recipes for compiling X11 with GCC. +The first alternative puts libgcc.a into the shared X library; the second +does not. Neither alternative works on all kinds of systems. +It may be that when using GCC 2.4, both alternatives work okay on +relatively recent Sparc systems. The first alternative is likely +not to work on a Sun 3 without hardware floating point.] + +How to compile X11R5 (patch level 11) with GCC version 2: + +The patches include support for building the shared libraries with GCC +2 on the Sparc and 68k machines. This version includes the necessary +parts of libgcc.a in the shared library for X, in case functions in +that library need it. Thus the default behavior is now to build +everything, including the libraries, with gcc. + +If you build the shared library this way, it may not work with +executables made with older versions of GCC (2.3.3 and earlier). +If that happens, relink those executables with the latest GCC. +IF YOU THINK YOU MIGHT COMPILE X FOR SOLARIS 2, then you really don't +need this patch: get /contrib/R5.SunOS5.patch.tar.Z from +export.lcs.mit.edu instead. It has everything you need to do the +build for Solaris 2, sets you up to everything with GCC, and is +backward compatible with Sunos 4.*. Get the the README +(/contrib/R5.SunOS5.patch.README at export) for more info. + +If you see undefined symbols _dlopen, _dlsym, or _dlclose when linking +with -lX11, compile and link against the file mit/util/misc/dlsym.c in +the MIT X11R5 distribution. Alternatively, do dynamic linking +by using a non-GNU ld. + +mit/config/Imake.tmpl -- Do not set -fstrength-reduce if we have GCC 2. +If -fstrength-reduce (or any other -f option) is a major win, then it +will most likely be turned on by -O2 optimization. + +mit/config/sunLib.rules -- If HasGcc and GccVersion > 1 are true, then +use gcc -fpic to generate PIC code. Make sure that gcc does not use +gas (the GNU assembler) when compiling PIC code; gas does not assemble +it correctly. + +***If you have gas installed where gcc uses it by default, you might have +to add -B/bin/ to the PositionIndependentCFlags.*** + +mit/config/site.def -- Define GccVersion to be 2. + +mit/config/sun.cf -- When compiling with GCC 2, use -O2 optimization. + +mit/config/sunLib.rules -- When compiling with GCC 2, use -fpic for +position independent code generation. + +mit/rgb/Imakefile -- No longer need to compile some modules with +cc on the Sparc since GCC 2 produces proper -fpcc-struct-return code. + +mit/server/os/Imakefile -- Likewise. + +mit/server/ddx/sun/Imakefile -- When compiling with GCC 2, some modules +should be compiled with -fvolatile. + +mit/clients/twm/Imakefile -- Fix bad decls of malloc, realloc in gram.c. + +mit/lib/X/Imakefile -- Make libgcc.a a required lib for libX11.so + +*** mit/clients/twm/Imakefile Mon May 17 22:05:22 1993 +--- new/clients/twm/Imakefile Mon May 17 22:28:46 1993 +*************** +*** 32,41 **** +--- 32,48 ---- + ComplexProgramTarget(twm) + InstallNonExecFile(system.twmrc,$(TWMDIR)) + ++ #if HasGcc && GccVersion > 1 && defined (SunArchitecture) + gram.h gram.c: gram.y + yacc $(YFLAGS) gram.y ++ sed -e 's/^extern char \*malloc(), \*realloc();//g' y.tab.c >gram.c ++ $(MV) y.tab.h gram.h ++ #else ++ gram.h gram.c: gram.y ++ yacc $(YFLAGS) gram.y + $(MV) y.tab.c gram.c + $(MV) y.tab.h gram.h ++ #endif + + clean:: + $(RM) y.tab.h y.tab.c lex.yy.c gram.h gram.c lex.c deftwmrc.c +*** mit/config/Imake.tmpl Mon May 17 22:02:57 1993 +--- new/config/Imake.tmpl Mon May 17 22:15:06 1993 +*************** +*** 500,506 **** +--- 500,510 ---- + #endif + #ifndef CcCmd + #if HasGcc ++ #if GccVersion > 1 ++ #define CcCmd gcc -fpcc-struct-return ++ #else + #define CcCmd gcc -fstrength-reduce -fpcc-struct-return ++ #endif + #else + #define CcCmd cc + #endif +*** mit/config/site.def Mon May 17 22:02:44 1993 +--- new/config/site.def Mon May 17 22:22:28 1993 +*************** +*** 25,31 **** + + #ifdef BeforeVendorCF + +! /* #define HasGcc YES */ + + #endif /* BeforeVendorCF */ + +--- 25,33 ---- + + #ifdef BeforeVendorCF + +! #define HasGcc YES +! /* GccVersion > 1 implies building shared libraries with gcc */ +! #define GccVersion 2 + + #endif /* BeforeVendorCF */ + +*** mit/config/sun.cf Mon May 17 22:03:02 1993 +--- new/config/sun.cf Mon May 17 22:24:55 1993 +*************** +*** 41,49 **** +--- 41,55 ---- + + #if HasGcc + ++ #if GccVersion > 1 ++ #define OptimizedCDebugFlags -O2 ++ #else ++ #define OptimizedCDebugFlags -O + #define SharedLibraryCcCmd cc + #define ExtraLoadFlags -B/usr/bin/ + #define AllocateLocalDefines /**/ ++ #endif ++ + + .c.o: + $(CC) -c $(CFLAGS) $*.c +*** mit/config/sunLib.rules Mon May 17 22:02:46 1993 +--- new/config/sunLib.rules Mon May 17 22:19:06 1993 +*************** +*** 23,29 **** +--- 23,33 ---- + #define SharedLibraryLoadFlags -assert pure-text + #endif + #ifndef PositionIndependentCFlags ++ #if defined(HasGcc) && GccVersion > 1 ++ #define PositionIndependentCFlags -fpic ++ #else + #define PositionIndependentCFlags -pic ++ #endif + #endif + + /* +*** mit/lib/X/Imakefile Mon May 17 22:05:03 1993 +--- new/lib/X/Imakefile Mon May 17 22:32:26 1993 +*************** +*** 9,14 **** +--- 9,31 ---- + #define MotifBC NO + #endif + ++ #if defined(SunArchitecture) ++ #if SystemV4 ++ #if HasGcc ++ REQUIREDLIBS= -lgcc -lc ++ #else ++ REQUIREDLIBS= -lc ++ #endif ++ #else ++ #if HasGcc && GccVersion > 1 ++ XCOMM Hack to fix gcc 2 ``-nostdlib'' deficiency on SunOS 4.x ++ REQUIREDLIBS= `gcc -v 2>&1 | awk '{print $$4}' | sed -e 's/specs$$/libgcc.a/'` ++ #else ++ REQUIREDLIBS= ++ #endif ++ #endif ++ #endif ++ + #ifndef BuildXimp + #define BuildXimp NO + #endif +*** mit/rgb/Imakefile Mon May 17 22:05:31 1993 +--- new/rgb/Imakefile Mon May 17 22:25:30 1993 +*************** +*** 17,23 **** + #if !(defined(SGIArchitecture) || SystemV4) + DBMLIB = -ldbm + #endif +! #if defined(SparcArchitecture) && HasGcc + CC = cc + CCOPTIONS = /**/ + EXTRA_LOAD_FLAGS = /**/ +--- 17,23 ---- + #if !(defined(SGIArchitecture) || SystemV4) + DBMLIB = -ldbm + #endif +! #if defined(SparcArchitecture) && HasGcc && GccVersion <= 1 + CC = cc + CCOPTIONS = /**/ + EXTRA_LOAD_FLAGS = /**/ +*** mit/server/ddx/sun/Imakefile Mon May 17 22:05:57 1993 +--- new/server/ddx/sun/Imakefile Mon May 17 22:27:23 1993 +*************** +*** 43,48 **** +--- 43,53 ---- + LinkFile(sunGX.o,sunGX.o.dist) + #endif + ++ #if HasGcc && GccVersion > 1 ++ SpecialObjectRule(sunCG2C.o,sunCG2C.c,-fvolatile) ++ SpecialObjectRule(sunCG2M.o,sunCG2M.c,-fvolatile) ++ #endif ++ + sunInitExtMono.o: $(ICONFIGFILES) + ObjectFromSpecialSource(sunInitExtMono,../mi/miinitext,-UPEXEXT) + ObjectFromSpecialSource(sunInitMono,sunInit,-DMONO_ONLY) +*** mit/server/os/Imakefile Mon May 17 22:05:46 1993 +--- new/server/os/Imakefile Mon May 17 22:26:02 1993 +*************** +*** 132,138 **** + SpecialObjectRule(osinit.o,$(ICONFIGFILES),$(ADM_DEFINES)) + SpecialObjectRule(WaitFor.o,$(ICONFIGFILES),$(EXT_DEFINES)) + SpecialObjectRule(fonttype.o,$(ICONFIGFILES),$(FONT_DEFINES)) +! #if defined(SparcArchitecture) && HasGcc + oscolor.o: $(ICONFIGFILES) + $(RM) $@ + cc -c $(DBM_DEFINES) $(CDEBUGFLAGS) $(ALLDEFINES) $*.c +--- 132,138 ---- + SpecialObjectRule(osinit.o,$(ICONFIGFILES),$(ADM_DEFINES)) + SpecialObjectRule(WaitFor.o,$(ICONFIGFILES),$(EXT_DEFINES)) + SpecialObjectRule(fonttype.o,$(ICONFIGFILES),$(FONT_DEFINES)) +! #if defined(SparcArchitecture) && HasGcc && GccVersion <= 1 + oscolor.o: $(ICONFIGFILES) + $(RM) $@ + cc -c $(DBM_DEFINES) $(CDEBUGFLAGS) $(ALLDEFINES) $*.c + + +[This is the older version] + +How to compile X11R5 (patch level 11) with GCC version 2: + +The patches include support for building the shared libraries with GCC 2 on +the Sparc and 68k machines. + +NOTE: Such shared libraries built with GCC version 2.3 DID NOT WORK +with executables previously linked using Sun CC! This is because +neither those executables nor the gcc-compiled shared libraries contain +libgcc.a. The shared libraries did work with executables linked using +GCC (running the Sun linker, of course) because GCC tells the linker to +link in libgcc.a. Because of these limitations the default behavior is +to NOT build the shared libraries with gcc. + +Changes in GCC 2.4 seem to have eliminated the problem, and such a +shared library now seems work with all executables. If you want the +gcc-compiled shared libraries turn on "Gcc2BuildLibs" in site.def. If +you try this, please tell bug-gcc@prep.ai.mit.edu whether it works. + +Sun forgot to include a static version of libdl.a with some versions +of SunOS (4.1 mainly). If you see undefined symbols _dlopen, _dlsym, +or _dlclose when linking with -lX11, compile and link against the file +mit/util/misc/dlsym.c in the MIT X11R5 distribution. + +mit/config/Imake.tmpl -- Do not set -fstrength-reduce if we have GCC 2. If +-fstrength-reduce (or any other -f option) is a major win, then it will +most likely be turned on by -O2 optimization. + +mit/config/sunLib.rules -- If HasGcc2 and Gcc2BuildLibs are defined, then +use gcc -fpic to generate PIC code. Make sure that gcc does not use gas (the +GNU assembler) when compiling PIC code; gas does not assemble it correctly. +If you have gas installed where gcc uses it by default, you might have to add +-B/bin/ to the PositionIndependentCFlags. + +mit/config/site.def -- Define HasGcc2 to be YES. + +mit/config/sun.cf -- When compiling with GCC 2, use -O2 optimization. + +mit/rgb/Imakefile -- No longer need to compile some modules with +cc on the Sparc since GCC 2 produces proper -fpcc-struct-return code. + +mit/server/os/Imakefile -- Likewise. + +mit/clients/twm/Imakefile -- fix bad decls of malloc, realloc in gram.c. + +*** mit/config/Imake.tmpl.ORIG Tue Dec 31 11:07:56 1991 +--- mit/config/Imake.tmpl Tue Dec 31 12:30:47 1991 +*************** +*** 499,508 **** +--- 499,512 ---- + #define HasGcc NO + #endif + #ifndef CcCmd ++ #if HasGcc2 ++ #define CcCmd gcc -fpcc-struct-return ++ #else + #if HasGcc + #define CcCmd gcc -fstrength-reduce -fpcc-struct-return + #else + #define CcCmd cc ++ #endif + #endif + #endif + #if HasFortran +*** mit/config/sunLib.rules.ORIG Tue Dec 31 11:11:24 1991 +--- mit/config/sunLib.rules Tue May 5 12:26:12 1992 +*************** +*** 23,30 **** +--- 23,34 ---- + #define SharedLibraryLoadFlags -assert pure-text + #endif + #ifndef PositionIndependentCFlags ++ #if defined(HasGcc2) && defined (Gcc2BuildLibs) ++ #define PositionIndependentCFlags -fpic ++ #else + #define PositionIndependentCFlags -pic + #endif ++ #endif + + /* + * InstallSharedLibrary - generate rules to install the shared library. +*** mit/config/site.def.ORIG Tue Dec 31 11:13:49 1991 +--- mit/config/site.def Tue Dec 31 12:02:59 1991 +*************** +*** 25,31 **** + + #ifdef BeforeVendorCF + +! /* #define HasGcc YES */ + + #endif /* BeforeVendorCF */ + +--- 25,33 ---- + + #ifdef BeforeVendorCF + +! #define HasGcc YES +! #define HasGcc2 YES +! /* #define Gcc2BuildLibs YES */ + + #endif /* BeforeVendorCF */ + +*** mit/config/sun.cf.ORIG Tue Dec 31 11:13:57 1991 +--- mit/config/sun.cf Tue May 5 12:29:50 1992 +*************** +*** 34,42 **** +--- 41,61 ---- + + #if HasGcc + ++ #if defined(HasGcc2) ++ #define OptimizedCDebugFlags -O2 ++ /* Leave Alone XXX */ ++ #else ++ #define OptimizedCDebugFlags -O + #define SharedLibraryCcCmd cc + #define ExtraLoadFlags -B/usr/bin/ + #define AllocateLocalDefines /**/ ++ #endif ++ ++ #if !defined(Gcc2BuildLibs) ++ #define SharedLibraryCcCmd cc ++ #define ExtraLoadFlags -B/usr/bin/ ++ #define AllocateLocalDefines /**/ ++ #endif + + .c.o: + $(CC) -c $(CFLAGS) $*.c +*** mit/rgb/Imakefile.ORIG Wed Jan 15 16:43:18 1992 +--- mit/rgb/Imakefile Thu Jan 2 13:34:09 1992 +*************** +*** 17,23 **** + #if !(defined(SGIArchitecture) || SystemV4) + DBMLIB = -ldbm + #endif +! #if defined(SparcArchitecture) && HasGcc + CC = cc + CCOPTIONS = /**/ + EXTRA_LOAD_FLAGS = /**/ +--- 17,23 ---- + #if !(defined(SGIArchitecture) || SystemV4) + DBMLIB = -ldbm + #endif +! #if defined(SparcArchitecture) && HasGcc && !defined(HasGcc2) + CC = cc + CCOPTIONS = /**/ + EXTRA_LOAD_FLAGS = /**/ +*** mit/server/os/Imakefile.ORIG Wed Jan 15 16:46:23 1992 +--- mit/server/os/Imakefile Wed Jan 15 16:46:48 1992 +*************** +*** 132,138 **** + SpecialObjectRule(osinit.o,$(ICONFIGFILES),$(ADM_DEFINES)) + SpecialObjectRule(WaitFor.o,$(ICONFIGFILES),$(EXT_DEFINES)) + SpecialObjectRule(fonttype.o,$(ICONFIGFILES),$(FONT_DEFINES)) +! #if defined(SparcArchitecture) && HasGcc + oscolor.o: $(ICONFIGFILES) + $(RM) $@ + cc -c $(DBM_DEFINES) $(CDEBUGFLAGS) $(ALLDEFINES) $*.c +--- 132,138 ---- + SpecialObjectRule(osinit.o,$(ICONFIGFILES),$(ADM_DEFINES)) + SpecialObjectRule(WaitFor.o,$(ICONFIGFILES),$(EXT_DEFINES)) + SpecialObjectRule(fonttype.o,$(ICONFIGFILES),$(FONT_DEFINES)) +! #if defined(SparcArchitecture) && HasGcc && !defined(HasGcc2) + oscolor.o: $(ICONFIGFILES) + $(RM) $@ + cc -c $(DBM_DEFINES) $(CDEBUGFLAGS) $(ALLDEFINES) $*.c +*** 1.1 1992/09/08 19:52:07 +--- mit/server/ddx/sun/Imakefile 1992/09/08 21:10:22 +*************** +*** 43,48 **** +--- 43,53 ---- + LinkFile(sunGX.o,sunGX.o.dist) + #endif + ++ #if HasGcc2 ++ SpecialObjectRule(sunCG2C.o,sunCG2C.c,-fvolatile) ++ SpecialObjectRule(sunCG2M.o,sunCG2M.c,-fvolatile) ++ #endif ++ + sunInitExtMono.o: $(ICONFIGFILES) + ObjectFromSpecialSource(sunInitExtMono,../mi/miinitext,-UPEXEXT) + ObjectFromSpecialSource(sunInitMono,sunInit,-DMONO_ONLY) + +*** /tmp/RCSAa24446 Tue Sep 15 12:23:32 1992 +--- mit/clients/twm/Imakefile Thu Aug 13 18:18:07 1992 +*************** +*** 32,41 **** +--- 32,48 ---- + ComplexProgramTarget(twm) + InstallNonExecFile(system.twmrc,$(TWMDIR)) + ++ #if HasGcc2 && defined (SunArchitecture) + gram.h gram.c: gram.y + yacc $(YFLAGS) gram.y ++ sed -e 's/^extern char \*malloc(), \*realloc();//g' y.tab.c >gram.c ++ $(MV) y.tab.h gram.h ++ #else ++ gram.h gram.c: gram.y ++ yacc $(YFLAGS) gram.y + $(MV) y.tab.c gram.c + $(MV) y.tab.h gram.h ++ #endif + + clean:: + $(RM) y.tab.h y.tab.c lex.yy.c gram.h gram.c lex.c deftwmrc.c + |