Initial integration of G77.

Please do a make cleandir before rebuilding gcc!

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diff --git a/gnu/usr.bin/gcc/f/news.texi b/gnu/usr.bin/gcc/f/news.texi
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@@ -0,0 +1,754 @@
+@c Copyright (C) 1995, 1996 Free Software Foundation, Inc.
+@c This is part of the G77 manual.
+@c For copying conditions, see the file g77.texi.
+
+@c The text of this file appears in the file BUGS
+@c in the G77 distribution, as well as in the G77 manual.
+
+@c 1996-04-01
+
+@ifclear NEWSONLY
+@node News
+@chapter News About GNU Fortran
+@end ifclear
+@cindex versions, recent
+@cindex recent versions
+
+@heading In 0.5.18:
+@itemize @bullet
+@item
+Add some rudimentary support for @samp{INTEGER*1},
+@samp{INTEGER*2}, @samp{INTEGER*8},
+and their @samp{LOGICAL} equivalents.
+(This support works on most, maybe all, @code{gcc} targets.)
+
+Thanks to Scott Snyder (@code{snyder@@d0sgif.fnal.gov})
+for providing the patch for this!
+
+Among the missing elements from the support for these
+features are full intrinsic support and constants.
+
+@item
+Add some rudimentary support for the @samp{BYTE} and
+@samp{WORD} type-declaration statements.
+@samp{BYTE} corresponds to @samp{INTEGER*1},
+while @samp{WORD} corresponds to @samp{INTEGER*2}.
+
+Thanks to Scott Snyder (@code{snyder@@d0sgif.fnal.gov})
+for providing the patch for this!
+
+@item
+The compiler code handling intrinsics has been largely
+rewritten to accommodate the new types.
+No new intrinsics or arguments for existing
+intrinsics have been added, so there is, at this
+point, no intrinsic to convert to @samp{INTEGER*8},
+for example.
+
+@item
+Support automatic arrays in procedures.
+
+@item
+Reduce space/time requirements for handling large
+@emph{sparsely} initialized aggregate arrays.
+This improvement applies to only a subset of
+the general problem to be addressed in 0.6.
+
+@item
+Treat initial values of zero as if they weren't
+specified (in DATA and type-declaration statements).
+The initial values will be set to zero anyway, but the amount
+of compile time processing them will be reduced,
+in some cases significantly (though, again, this
+is only a subset of the general problem to be
+addressed in 0.6).
+
+A new option, @samp{-fzeros}, is introduced to
+enable the traditional treatment of zeros as any
+other value.
+
+@item
+With @samp{-ff90} in force, @code{g77} incorrectly
+interpreted @samp{REAL(Z)} as returning a @samp{REAL}
+result, instead of as a @samp{DOUBLE PRECISION}
+result.
+(Here, @samp{Z} is @samp{DOUBLE COMPLEX}.)
+
+With @samp{-fno-f90} in force, the interpretation remains
+unchanged, since this appears to be how at least some
+F77 code using the @samp{DOUBLE COMPLEX} extension expected
+it to work.
+
+Essentially, @samp{REAL(Z)} in F90 is the same as
+@samp{DBLE(Z)}, while in extended F77, it appears to
+be the same as @samp{REAL(REAL(Z))}.
+
+@item
+An expression involving exponentiation, where both operands
+were type @samp{INTEGER} and the right-hand operand
+was negative, was erroneously evaluated.
+
+@item
+Fix bugs involving @samp{DATA} implied-@samp{DO} constructs
+(these involved an errant diagnostic and a crash, both on good
+code, one involving subsequent statement-function definition).
+
+@item
+Close @samp{INCLUDE} files after processing them, so compiling source
+files with lots of @samp{INCLUDE} statements does not result in
+being unable to open @samp{INCLUDE} files after all the available
+file descriptors are used up.
+
+@item
+Speed up compiling, especially of larger programs, and perhaps
+slightly reduce memory utilization while compiling (this is
+@emph{not} the improvement planned for 0.6 involving large aggregate
+areas)---these improvements result from simply turning
+off some low-level code to do self-checking that hasn't been
+triggered in a long time.
+
+@item
+Introduce three new options that
+implement optimizations in the @code{gcc} back end (GBE).
+These options are @samp{-fmove-all-movables}, @samp{-freduce-all-givs},
+and @samp{-frerun-loop-opt}, which are enabled, by default,
+for Fortran compilations.
+These optimizations are intended to help toon Fortran programs.
+
+@item
+Patch the GBE to do a better job optimizing certain
+kinds of references to array elements.
+
+@item
+Due to patches to the GBE, the version number of @code{gcc}
+also is patched to make it easier to manage installations,
+especially useful if it turns out a @code{g77} change to the
+GBE has a bug.
+
+The @code{g77}-modified version number is the @code{gcc}
+version number with the string @samp{.f.@var{n}} appended,
+where @samp{f} identifies the version as enhanced for
+Fortran, and @var{n} is @samp{1} for the first Fortran
+patch for that version of @code{gcc}, @samp{2} for the
+second, and so on.
+
+So, this introduces version @samp{2.7.2.f.1} of @code{gcc}.
+
+@item
+Make several improvements and fixes to diagnostics, including
+the removal of two that were inappropriate or inadequate.
+
+@item
+Warning about two successive arithmetic operators, produced
+by @samp{-Wsurprising}, now produced @emph{only} when both
+operators are, indeed, arithmetic (not relational/boolean).
+
+@item
+@samp{-Wsurprising} now warns about the remaining cases
+of using non-integral variables for implied-@code{DO}
+loops, instead of these being rejected unless @samp{-fpedantic}
+or @samp{-fugly} specified.
+
+@item
+Allow @samp{SAVE} of a local variable or array, even after
+it has been given an initial value via @samp{DATA}, for example.
+
+@item
+Introduce an Info version of @code{g77} documentation, which
+supercedes @file{gcc/f/CREDITS}, @file{gcc/f/DOC}, and
+@file{gcc/f/PROJECTS}.
+These files will be removed in a future release.
+The files @file{gcc/f/BUGS}, @file{gcc/f/INSTALL}, and
+@file{gcc/f/NEWS} now are automatically built from
+the texinfo source when distributions are made.
+
+This effort was inspired by a first pass at translating
+@code{g77-0.5.16/f/DOC} that was contributed to Craig by
+David Ronis (@code{ronis@@onsager.chem.mcgill.ca}).
+
+@item
+New @samp{-fno-second-underscore} option to specify
+that, when @samp{-funderscoring} is in effect, a second
+underscore is not to be appended to Fortran names already
+containing an underscore.
+
+@item
+Change the way iterative @code{DO} loops work to follow
+the F90 standard.
+In particular, calculation of the iteration count is
+still done by converting the start, end, and increment
+parameters to the type of the @code{DO} variable, but
+the result of the calculation is always converted to
+the default @samp{INTEGER} type.
+
+(This should have no effect on existing code compiled
+by @code{g77}, but code written to assume that use
+of a @emph{wider} type for the @code{DO} variable
+will result in an iteration count being fully calculated
+using that wider type (wider
+than default @samp{INTEGER}) must be rewritten.)
+
+@item
+Upgrade to @code{libf2c} as of 1996-03-23, and
+fix up some of the build procedures.
+
+Note that the email addresses related to @code{f2c}
+have changed---the distribution site now is
+named @code{netlib.bell-labs.com}, and the
+maintainer's new address is @code{dmg@@bell-labs.com}.
+@end itemize
+
+@heading In 0.5.17:
+@itemize @bullet
+@item
+@strong{Fix serious bug} in @samp{g77 -v} command that can cause removal of a
+system's @file{/dev/null} special file if run by user @samp{root}.
+
+@strong{All users} of version 0.5.16 should ensure that
+they have not removed @file{/dev/null} or replaced it with an ordinary
+file (e.g. by comparing the output of @samp{ls -l /dev/null} with
+@samp{ls -l /dev/zero}.
+If the output isn't basically the
+same, contact your system
+administrator about restoring @file{/dev/null} to its proper status).
+
+This bug is particularly insidious because removing @file{/dev/null} as
+a special file can go undetected for quite a while, aside from
+various applications and programs exhibiting sudden, strange
+behaviors.
+
+I sincerely apologize for not realizing the
+implications of the fact that when @samp{g77 -v} runs the @code{ld} command
+with @samp{-o /dev/null} that @code{ld} tries to @emph{remove} the executable
+it is supposed to build (especially if it reports unresolved
+references, which it should in this case)!
+
+@item
+Fix crash on @samp{CHARACTER*(*) FOO} in a main or block data program unit.
+
+@item
+Fix crash that can occur when diagnostics given outside of any
+program unit (such as when input file contains @samp{@@foo}).
+
+@item
+Fix crashes, infinite loops (hangs), and such involving diagnosed code.
+
+@item
+Fix @samp{ASSIGN}'ed variables so they can be @samp{SAVE}'d or dummy arguments,
+and issue clearer error message in cases where target of @samp{ASSIGN}
+or @samp{ASSIGN}ed @samp{GOTO}/@samp{FORMAT} is too small (which should
+never happen).
+
+@item
+Make @code{libf2c} build procedures work on more systems again by
+eliminating unnecessary invocations of @samp{ld -r -x} and @samp{mv}.
+
+@item
+Fix omission of @samp{-funix-intrinsics-@dots{}} options in list of permitted
+options to compiler.
+
+@item
+Fix failure to always diagnose missing type declaration for
+@samp{IMPLICIT NONE}.
+
+@item
+Fix compile-time performance problem (which could sometimes
+crash the compiler, cause a hang, or whatever, due to a bug
+in the back end) involving exponentiation with a large @samp{INTEGER}
+constant for the right-hand operator (e.g. @samp{I**32767}).
+
+@item
+Fix build procedures so cross-compiling @code{g77} (the @code{fini}
+utility in particular) is properly built using the host compiler.
+
+@item
+Add new @samp{-Wsurprising} option to warn about constructs that are
+interpreted by the Fortran standard (and @code{g77}) in ways that
+are surprising to many programmers.
+
+@item
+Add @samp{ERF()} and @samp{ERFC()} as generic intrinsics mapping to existing
+@samp{ERF}/@samp{DERF} and @samp{ERFC}/@samp{DERFC} specific intrinsics.
+
+@emph{Note:} You should
+specify @samp{INTRINSIC ERF,ERFC} in any code where you might use
+these as generic intrinsics, to improve likelihood of diagnostics
+(instead of subtle run-time bugs) when using a compiler that
+doesn't support these as intrinsics (e.g. @code{f2c}).
+
+@item
+Remove from @samp{-fno-pedantic} the diagnostic about @samp{DO}
+with non-@samp{INTEGER} index variable; issue that under
+@samp{-Wsurprising} instead.
+
+@item
+Clarify some diagnostics that say things like ``ignored'' when that's
+misleading.
+
+@item
+Clarify diagnostic on use of @samp{.EQ.}/@samp{.NE.} on @samp{LOGICAL}
+operands.
+
+@item
+Minor improvements to code generation for various operations on
+@samp{LOGICAL} operands.
+
+@item
+Minor improvement to code generation for some @samp{DO} loops on some
+machines.
+
+@item
+Support @code{gcc} version 2.7.1.
+
+@item
+Upgrade to @code{libf2c} as of 1995-11-15.
+@end itemize
+
+@heading In 0.5.16:
+@itemize @bullet
+@item
+Fix a code-generation bug involving complicated @samp{EQUIVALENCE} statements
+not involving @samp{COMMON}
+
+@item
+Fix code-generation bugs involving invoking ``gratis'' library procedures
+in @code{libf2c} from code compiled with @samp{-fno-f2c} by making these
+procedures known to @code{g77} as intrinsics (not affected by -fno-f2c).
+This is known to fix code invoking @samp{ERF()}, @samp{ERFC()},
+@samp{DERF()}, and @samp{DERFC()}.
+
+@item
+Update @code{libf2c} to include netlib patches through 1995-08-16, and
+@samp{#define} @samp{WANT_LEAD_0} to 1 to make @code{g77}-compiled code more
+consistent with other Fortran implementations by outputting
+leading zeros in formatted and list-directed output.
+
+@item
+Fix a code-generation bug involving adjustable dummy arrays with high
+bounds whose primaries are changed during procedure execution, and
+which might well improve code-generation performance for such arrays
+compared to @code{f2c} plus @code{gcc} (but apparently only when using
+@file{gcc-2.7.0} or later).
+
+@item
+Fix a code-generation bug involving invocation of @samp{COMPLEX} and
+@samp{DOUBLE COMPLEX} @samp{FUNCTION}s and doing @samp{COMPLEX} and
+@samp{DOUBLE COMPLEX} divides, when the result
+of the invocation or divide is assigned directly to a variable
+that overlaps one or more of the arguments to the invocation or divide.
+
+@item
+Fix crash by not generating new optimal code for @samp{X**I} if @samp{I} is
+nonconstant and the expression is used to dimension a dummy
+array, since the @code{gcc} back end does not support the necessary
+mechanics (and the @code{gcc} front end rejects the equivalent
+construct, as it turns out).
+
+@item
+Fix crash on expressions like @samp{COMPLEX**INTEGER}.
+
+@item
+Fix crash on expressions like @samp{(1D0,2D0)**2}, i.e. raising a
+@samp{DOUBLE COMPLEX} constant to an @samp{INTEGER} constant power.
+
+@item
+Fix crashes and such involving diagnosed code.
+
+@item
+Diagnose, instead of crashing on, statement function definitions
+having duplicate dummy argument names.
+
+@item
+Fix bug causing rejection of good code involving statement function
+definitions.
+
+@item
+Fix bug resulting in debugger not knowing size of local equivalence
+area when any member of area has initial value (via @samp{DATA},
+for example).
+
+@item
+Fix installation bug that prevented installation of @code{g77} driver.
+Provide for easy selection of whether to install copy of @code{g77}
+as @code{f77} to replace the broken code.
+
+@item
+Fix @code{gcc} driver (affects @code{g77} thereby) to not
+gratuitously invoke the
+@code{f771} program (e.g. when @samp{-E} is specified).
+
+@item
+Fix diagnostic to point to correct source line when it immediately
+follows an @samp{INCLUDE} statement.
+
+@item
+Support more compiler options in @code{gcc}/@code{g77} when
+compiling Fortran files.
+These options include @samp{-p}, @samp{-pg}, @samp{-aux-info}, @samp{-P},
+correct setting of version-number macros for preprocessing, full
+recognition of @samp{-O0}, and
+automatic insertion of configuration-specific linker specs.
+
+@item
+Add new intrinsics that interface to existing routines in @code{libf2c}:
+@samp{ABORT}, @samp{DERF}, @samp{DERFC}, @samp{ERF}, @samp{ERFC}, @samp{EXIT},
+@samp{FLUSH}, @samp{GETARG}, @samp{GETENV}, @samp{IARGC},
+@samp{SIGNAL}, and @samp{SYSTEM}.
+Note that @samp{ABORT}, @samp{EXIT}, @samp{FLUSH}, @samp{SIGNAL}, and
+@samp{SYSTEM} are intrinsic subroutines, not functions (since they
+have side effects), so to get the return values from @samp{SIGNAL}
+and @samp{SYSTEM}, append a final argument specifying an @samp{INTEGER}
+variable or array element (e.g. @samp{CALL SYSTEM('rm foo',ISTAT)}).
+
+@item
+Add new intrinsic group named @samp{unix} to contain the new intrinsics,
+and by default enable this new group.
+
+@item
+Move @samp{LOC()} intrinsic out of the @samp{vxt} group to the new
+@samp{unix} group.
+
+@item
+Improve @code{g77} so that @samp{g77 -v} by itself (or with
+certain other options, including @samp{-B}, @samp{-b}, @samp{-i},
+@samp{-nostdlib}, and @samp{-V}) reports lots more useful
+version info, and so that long-form options @code{gcc} accepts are
+understood by @code{g77} as well (even in truncated, unambiguous forms).
+
+@item
+Add new @code{g77} option @samp{--driver=name} to specify driver when
+default, @code{gcc}, isn't appropriate.
+
+@item
+Add support for @samp{#} directives (as output by the preprocessor) in the
+compiler, and enable generation of those directives by the
+preprocessor (when compiling @samp{.F} files) so diagnostics and debugging
+info are more useful to users of the preprocessor.
+
+@item
+Produce better diagnostics, more like @code{gcc}, with info such as
+@samp{In function `foo':} and @samp{In file included from...:}.
+
+@item
+Support @code{gcc}'s @samp{-fident} and @samp{-fno-ident} options.
+
+@item
+When @samp{-Wunused} in effect, don't warn about local variables used as
+statement-function dummy arguments or @samp{DATA} implied-@samp{DO} iteration
+variables, even though, strictly speaking, these are not uses
+of the variables themselves.
+
+@item
+When @samp{-W -Wunused} in effect, don't warn about unused dummy arguments
+at all, since there's no way to turn this off for individual
+cases (@code{g77} might someday start warning about these)---applies
+to @code{gcc} versions 2.7.0 and later, since earlier versions didn't
+warn about unused dummy arguments.
+
+@item
+New option @samp{-fno-underscoring} that inhibits transformation of names
+(by appending one or two underscores) so users may experiment
+with implications of such an environment.
+
+@item
+Minor improvement to @file{gcc/f/info} module to make it easier to build
+@code{g77} using the native (non-@code{gcc}) compiler on certain machines
+(but definitely not all machines nor all non-@code{gcc} compilers).
+Please
+do not report bugs showing problems compilers have with
+macros defined in @file{gcc/f/target.h} and used in places like
+@file{gcc/f/expr.c}.
+
+@item
+Add warning to be printed for each invocation of the compiler
+if the target machine @samp{INTEGER}, REAL, or @samp{LOGICAL} size
+is not 32 bits,
+since @code{g77} is known to not work well for such cases (to be
+fixed in Version 0.6---@pxref{Actual Bugs,,Actual Bugs We Haven't Fixed Yet}).
+
+@item
+Lots of new documentation (though work is still needed to put it into
+canonical GNU format).
+
+@item
+Build @code{libf2c} with @samp{-g0}, not @samp{-g2}, in effect
+(by default), to produce
+smaller library without lots of debugging clutter.
+@end itemize
+
+@heading In 0.5.15:
+@itemize @bullet
+@item
+Fix bad code generation involving @samp{X**I} and temporary, internal variables
+generated by @code{g77} and the back end (such as for @samp{DO} loops).
+
+@item
+Fix crash given @samp{CHARACTER A;DATA A/.TRUE./}.
+
+@item
+Replace crash with diagnostic given @samp{CHARACTER A;DATA A/1.0/}.
+
+@item
+Fix crash or other erratic behavior when null character constant
+(@samp{''}) is encountered.
+
+@item
+Fix crash or other erratic behavior involving diagnosed code.
+
+@item
+Fix code generation for external functions returning type @samp{REAL} when
+the @samp{-ff2c} option is in force (which it is by default) so that
+@code{f2c} compatibility is indeed provided.
+
+@item
+Disallow @samp{COMMON I(10)} if @samp{I} has previously been specified
+with an array declarator.
+
+@item
+New @samp{-ffixed-line-length-@var{n}} option, where @var{n} is the
+maximum length
+of a typical fixed-form line, defaulting to 72 columns, such
+that characters beyond column @var{n} are ignored, or @var{n} is @samp{none},
+meaning no characters are ignored.
+does not affect lines
+with @samp{&} in column 1, which are always processed as if
+@samp{-ffixed-line-length-none} was in effect.
+
+@item
+No longer generate better code for some kinds of array references,
+as @code{gcc} back end is to be fixed to do this even better, and it
+turned out to slow down some code in some cases after all.
+
+@item
+In @samp{COMMON} and @samp{EQUIVALENCE} areas with any members given initial
+values (e.g. via @samp{DATA}), uninitialized members now always
+initialized to binary zeros (though this is not required by
+the standard, and might not be done in future versions
+of @code{g77}).
+Previously, in some @samp{COMMON}/@samp{EQUIVALENCE} areas
+(essentially those with members of more than one type), the
+uninitialized members were initialized to spaces, to
+cater to @samp{CHARACTER} types, but it seems no existing code expects
+that, while much existing code expects binary zeros.
+@end itemize
+
+@heading In 0.5.14:
+@itemize @bullet
+@item
+Don't emit bad code when low bound of adjustable array is nonconstant
+and thus might vary as an expression at run time.
+
+@item
+Emit correct code for calculation of number of trips in @samp{DO} loops
+for cases
+where the loop should not execute at all.
+(This bug affected cases
+where the difference between the begin and end values was less
+than the step count, though probably not for floating-point cases.)
+
+@item
+Fix crash when extra parentheses surround item in
+@samp{DATA} implied-@samp{DO} list.
+
+@item
+Fix crash over minor internal inconsistencies in handling diagnostics,
+just substitute dummy strings where necessary.
+
+@item
+Fix crash on some systems when compiling call to @samp{MVBITS()} intrinsic.
+
+@item
+Fix crash on array assignment @samp{TYPE@var{ddd}(...)=...}, where @var{ddd}
+is a string of one or more digits.
+
+@item
+Fix crash on @samp{DCMPLX()} with a single @samp{INTEGER} argument.
+
+@item
+Fix various crashes involving code with diagnosed errors.
+
+@item
+Support @samp{-I} option for @samp{INCLUDE} statement, plus @code{gcc}'s
+@file{header.gcc} facility for handling systems like MS-DOS.
+
+@item
+Allow @samp{INCLUDE} statement to be continued across multiple lines,
+even allow it to coexist with other statements on the same line.
+
+@item
+Incorporate Bellcore fixes to @code{libf2c} through 1995-03-15---this
+fixes a bug involving infinite loops reading EOF with empty list-directed
+I/O list.
+
+@item
+Remove all the @code{g77}-specific auto-configuration scripts, code,
+and so on,
+except for temporary substitutes for bsearch() and strtoul(), as
+too many configure/build problems were reported in these areas.
+People will have to fix their systems' problems themselves, or at
+least somewhere other than @code{g77}, which expects a working ANSI C
+environment (and, for now, a GNU C compiler to compile @code{g77} itself).
+
+@item
+Complain if initialized common redeclared as larger in subsequent program
+unit.
+
+@item
+Warn if blank common initialized, since its size can vary and hence
+related warnings that might be helpful won't be seen.
+
+@item
+New @samp{-fbackslash} option, on by default, that causes @samp{\}
+within @samp{CHARACTER}
+and Hollerith constants to be interpreted a la GNU C.
+Note that
+this behavior is somewhat different from @samp{f2c}'s, which supports only
+a limited subset of backslash (escape) sequences.
+
+@item
+Make @samp{-fugly-args} the default.
+
+@item
+New @samp{-fugly-init} option, on by default, that allows typeless/Hollerith
+to be specified as initial values for variables or named constants
+(@samp{PARAMETER}), and also allows character<->numeric conversion in
+those contexts---turn off via @samp{-fno-ugly-init}.
+
+@item
+New @samp{-finit-local-zero} option to initialize
+local variables to binary zeros.
+This does not affect whether they are @samp{SAVE}d, i.e. made
+automatic or static.
+
+@item
+New @samp{-Wimplicit} option to warn about implicitly typed variables, arrays,
+and functions.
+(Basically causes all program units to default to @samp{IMPLICIT NONE}.)
+
+@item
+@samp{-Wall} now implies @samp{-Wuninitialized} as with @code{gcc}
+(i.e. unless @samp{-O} not specified, since @samp{-Wuninitialized}
+requires @samp{-O}), and implies @samp{-Wunused} as well.
+
+@item
+@samp{-Wunused} no longer gives spurious messages for unused
+@samp{EXTERNAL} names (since they are assumed to refer to block data
+program units, to make use of libraries more reliable).
+
+@item
+Support @samp{%LOC()} and @samp{LOC()} of character arguments.
+
+@item
+Support null (zero-length) character constants and expressions.
+
+@item
+Support @code{f2c}'s @samp{IMAG()} generic intrinsic.
+
+@item
+Support @samp{ICHAR()}, @samp{IACHAR()}, and @samp{LEN()} of
+character expressions that are valid in assignments but
+not normally as actual arguments.
+
+@item
+Support @code{f2c}-style @samp{&} in column 1 to mean continuation line.
+
+@item
+Allow @samp{NAMELIST}, @samp{EXTERNAL}, @samp{INTRINSIC}, and @samp{VOLATILE}
+in @samp{BLOCK DATA}, even though these are not allowed by the standard.
+
+@item
+Allow @samp{RETURN} in main program unit.
+
+@item
+Changes to Hollerith-constant support to obey Appendix C of the
+standard:
+
+@itemize --
+@item
+Now padded on the right with zeros, not spaces.
+
+@item
+Hollerith ``format specifications'' in the form of arrays of
+non-character allowed.
+
+@item
+Warnings issued when non-blank truncation occurs when converting
+to another type.
+
+@item
+When specified as actual argument, now passed
+by reference to @samp{INTEGER} (padded on right with spaces if constant
+too small, otherwise fully intact if constant wider the @samp{INTEGER}
+type) instead of by value.
+@end itemize
+
+@strong{Warning:} @code{f2c} differs on the
+interpretation of @samp{CALL FOO(1HX)}, which it treats exactly the
+same as @samp{CALL FOO('X')}, but which the standard and @code{g77} treat
+as @samp{CALL FOO(%REF('X   '))} (padded with as many blanks as necessary
+to widen to @samp{INTEGER}), essentially.
+
+@item
+Changes and fixes to typeless-constant support:
+
+@itemize --
+@item
+Now treated as a typeless double-length @samp{INTEGER} value.
+
+@item
+Warnings issued when overflow occurs.
+
+@item
+Padded on the left with zeros when converting
+to a larger type.
+
+@item
+Should be properly aligned and ordered on
+the target machine for whatever type it is turned into.
+
+@item
+When specified as actual argument, now passed as reference to
+a default @samp{INTEGER} constant.
+@end itemize
+
+@item
+@samp{%DESCR()} of a non-@samp{CHARACTER} expression now passes a pointer to
+the expression plus a length for the expression just as if
+it were a @samp{CHARACTER} expression.
+For example, @samp{CALL FOO(%DESCR(D))}, where
+@samp{D} is @samp{REAL*8}, is the same as @samp{CALL FOO(D,%VAL(8)))}.
+
+@item
+Name of multi-entrypoint master function changed to incorporate
+the name of the primary entry point instead of a decimal
+value, so the name of the master function for @samp{SUBROUTINE X}
+with alternate entry points is now @samp{__g77_masterfun_x}.
+
+@item
+Remove redundant message about zero-step-count @samp{DO} loops.
+
+@item
+Clean up diagnostic messages, shortening many of them.
+
+@item
+Fix typo in @code{g77} man page.
+
+@item
+Clarify implications of constant-handling bugs in @file{f/BUGS}.
+
+@item
+Generate better code for @samp{**} operator with a right-hand operand of
+type @samp{INTEGER}.
+
+@item
+Generate better code for @samp{SQRT()} and @samp{DSQRT()},
+also when @samp{-ffast-math}
+specified, enable better code generation for @samp{SIN()} and @samp{COS()}.
+
+@item
+Generate better code for some kinds of array references.
+
+@item
+Speed up lexing somewhat (this makes the compilation phase noticably
+faster).
+@end itemize