-@c Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
+@c Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
+@c Free Software Foundation, Inc.
@c This is part of the G77 manual.
@c For copying conditions, see the file g77.texi.
@c Keep this the same as the dates above, since it's used
@c in the standalone derivations of this file (e.g. NEWS).
-@set copyrights-news 1995,1996,1997,1998,1999,2000,2001
+@set copyrights-news 1995,1996,1997,1998,1999,2000,2001,2002
-@set last-update-news 2001-04-21
+@set last-update-news 2002-07-25
@include root.texi
@cindex changes, user-visible
@cindex user-visible changes
-This chapter describes changes to @code{g77} that are visible
+This chapter describes changes to @command{g77} that are visible
to the programmers who actually write and maintain Fortran
-code they compile with @code{g77}.
+code they compile with @command{g77}.
Information on changes to installation procedures,
changes to the documentation, and bug fixes is
not provided here, unless it is likely to affect how
-users use @code{g77}.
+users use @command{g77}.
@xref{News,,News About GNU Fortran}, for information on
-such changes to @code{g77}.
+such changes to @command{g77}.
@end ifset
@ifclear USERVISONLY
involve a combination of these elements.
@end ifclear
-Note that two variants of @code{g77} are tracked below.
+Note that two variants of @command{g77} are tracked below.
The @code{egcs} variant is described vis-a-vis
previous versions of @code{egcs} and/or
an official FSF version, as appropriate.
somewhat more difficult.
@ifset DOC-G77
-For information on bugs in the @value{which-g77} version of @code{g77},
+For information on bugs in the @value{which-g77} version of @command{g77},
see @ref{Known Bugs,,Known Bugs In GNU Fortran}.
@end ifset
@ifset DOC-BUGS
-For information on bugs in the @value{which-g77} version of @code{g77},
+For information on bugs in the @value{which-g77} version of @command{g77},
see @file{@value{path-g77}/BUGS}.
@end ifset
@ifset DEVELOPMENT
@emph{Warning:} The information below is still under development,
-and might not accurately reflect the @code{g77} code base
+and might not accurately reflect the @command{g77} code base
of which it is a part.
Efforts are made to keep it somewhat up-to-date,
but they are particularly concentrated
on any version of this information
-that is distributed as part of a @emph{released} @code{g77}.
+that is distributed as part of a @emph{released} @command{g77}.
In particular, while this information is intended to apply to
-the @value{which-g77} version of @code{g77},
+the @value{which-g77} version of @command{g77},
only an official @emph{release} of that version
is expected to contain documentation that is
-most consistent with the @code{g77} product in that version.
+most consistent with the @command{g77} product in that version.
-Nevertheless, information on @emph{previous} releases of @code{g77}, below,
+Nevertheless, information on @emph{previous} releases of @command{g77}, below,
is likely to be more up-to-date and accurate
than the equivalent information that accompanied
those releases,
is later than the dates of those releases.
That's due to attempts to keep this development version
-of news about previous @code{g77} versions up-to-date.
+of news about previous @command{g77} versions up-to-date.
@end ifset
@ifclear USERVISONLY
An online, ``live'' version of this document
(derived directly from the mainline, development version
-of @code{g77} within @code{gcc})
+of @command{g77} within @command{gcc})
is available at
-@uref{http://www.gnu.org/software/gcc/onlinedocs/g77_news.html}.
+@uref{http://www.gnu.org/software/gcc/onlinedocs/g77/News.html}.
@end ifclear
The following information was last updated on @value{last-update-news}:
-@heading In development, 0.5.27, @code{GCC} 3.1 versus @code{GCC} 3.0:
+@heading In @code{GCC} 3.3 versus @code{GCC} 3.2:
@itemize @bullet
-@ifclear USERVISONLY
@item
-[ Nothing yet ]
-@end ifclear
+Richard Henderson (@email{rth@@redhat.com}) analysed and improved the handling
+of (no-)aliasing information for dummy arguments and improved the optimization
+of induction variables in unrolled loops.
@end itemize
-@heading In prerelease, 0.5.26, @code{GCC} 3.0 versus @code{GCC} 2.95:
+@heading In @code{GCC} 3.2 versus @code{GCC} 3.1:
+@itemize @bullet
+@item
+Nothing.
+@end itemize
+
+@heading In @code{GCC} 3.1 (formerly known as g77-0.5.27) versus @code{GCC} 3.0:
+@itemize @bullet
+@item
+Problem Reports fixed (in chronological order of submission):
+@table @code
+@item 947
+Data statement initialization with subscript of kind INTEGER*2
+@item 3743
+Reference to intrinsic `ISHFT' invalid
+@item 3807
+Function BESJN(integer,double) problems
+@item 3957
+g77 -pipe -xf77-cpp-input sends output to stdout
+@item 4279
+g77 -h" gives bogus output
+@item 4730
+ICE on valid input using CALL EXIT(%VAL(...))
+@item 4752
+g77 -v -c -xf77-version /dev/null -xnone causes ice
+@item 4885
+BACKSPACE example that doesn't work as of gcc/g77-3.0.x
+@item 5122
+g77 rejects accepted use of INTEGER*2 as type of DATA statement loop index
+@item 5397
+ICE on compiling source with 540 000 000 REAL array
+@item 5473
+ICE on BESJN(integer*8,real)
+@item 5837
+bug in loop unrolling
+@end table
+
+@item
+@command{g77} now has its man page generated from the texinfo documentation,
+to guarantee that it remains up to date.
+
+@item
+@command{g77} used to reject the following program on 32-bit targets:
+@smallexample
+PROGRAM PROG
+DIMENSION A(140 000 000)
+END
+@end smallexample
+with the message:
+@smallexample
+prog.f: In program `prog':
+prog.f:2:
+ DIMENSION A(140 000 000)
+ ^
+Array `a' at (^) is too large to handle
+@end smallexample
+because 140 000 000 REALs is larger than the largest bit-extent that can be
+expressed in 32 bits. However, bit-sizes never play a role after offsets
+have been converted to byte addresses. Therefore this check has been removed,
+and the limit is now 2 Gbyte of memory (around 530 000 000 REALs).
+Note: On GNU/Linux systems one has to compile and link programs that occupy
+more than 1 Gbyte statically, i.e.@: @code{g77 -static ...}.
+
+@item
+Based on work done by Juergen Pfeifer (@email{juergen.pfeifer@@gmx.net})
+libf2c is now a shared library. One can still link in all objects with
+the program by specifying the @option{-static} option.
+
+@item
+Robert Anderson (@email{rwa@@alumni.princeton.edu}) thought up a two
+line change that enables g77 to compile such code as:
+@smallexample
+SUBROUTINE SUB(A, N)
+DIMENSION N(2)
+DIMENSION A(N(1),N(2))
+A(1,1) = 1.
+END
+@end smallexample
+Note the use of array elements in the bounds of the adjustable array A.
+
+@item
+George Helffrich (@email{george@@geo.titech.ac.jp}) implemented a change
+in substring index checking (when specifying @option{-fbounds-check})
+that permits the use of zero length substrings of the form
+@code{string(1:0)}.
+
+@item
+Based on code developed by Pedro Vazquez (@email{vazquez@@penelope.iqm.unicamp.br}),
+the @code{libf2c} library is now able to read and write files larger than
+2 Gbyte on 32-bit target machines, if the operating system supports this.
+@end itemize
+
+@heading In 0.5.26, @code{GCC} 3.0 versus @code{GCC} 2.95:
@itemize @bullet
-@ifclear USERVISONLY
@item
When a REWIND was issued after a WRITE statement on an unformatted
file, the implicit truncation was performed by copying the truncated
file to /tmp and copying the result back. This has been fixed by using
the @code{ftruncate} OS function. Thanks go to the GAMESS developers
for bringing this to our attention.
-@end ifclear
-@ifclear USERVISONLY
@item
-It is not necessary anymore to use the option @code{-femulate-complex}
+Using options @option{-g}, @option{-ggdb} or @option{-gdwarf[-2]} (where
+appropriate for your target) now also enables debugging information
+for COMMON BLOCK and EQUIVALENCE items to be emitted.
+Thanks go to Andrew Vaught (@email{andy@@xena.eas.asu.edu}) and
+George Helffrich (@email{george@@geology.bristol.ac.uk}) for
+fixing this longstanding problem.
+
+@item
+It is not necessary anymore to use the option @option{-femulate-complex}
to compile Fortran code using COMPLEX arithmetic, even on 64-bit machines
(like the Alpha). This will improve code generation.
-@end ifclear
-@ifclear USERVISONLY
@item
INTRINSIC arithmetic functions are now treated as routines that do not
depend on anything but their argument(s). This enables further instruction
scheduling, because it is known that they cannot read or modify arbitrary
locations.
-@end ifclear
@ifclear USERVISONLY
@item
This fixes a bug where a namelist containing initialization of LOGICAL
items and a variable starting with T or F would be read incorrectly.
-@end ifclear
-@ifclear USERVISONLY
-@item
-Using options @code{-g}, @code{-ggdb} or @code{-gdwarf[-2]} (where
-appropriate for your target) now also enables debugging information
-for COMMON BLOCK and EQUIVALENCE items to be emitted.
-@end ifclear
-
-@ifclear USERVISONLY
@item
The @code{TtyNam} intrinsics now set @var{Name} to all spaces (at run time)
if the system has no @code{ttyname} implementation available.
-@end ifclear
-@ifclear USERVISONLY
@item
Upgrade to @code{libf2c} as of 1999-06-28.
@itemize @bullet
@ifclear USERVISONLY
@item
-@code{g77} no longer generates bad code for assignments,
+@command{g77} no longer generates bad code for assignments,
or other conversions,
of @code{REAL} or @code{COMPLEX} constant expressions
to type @code{INTEGER(KIND=2)}
@ifclear USERVISONLY
@item
-@code{g77} no longer truncates @code{INTEGER(KIND=2)}
+@command{g77} no longer truncates @code{INTEGER(KIND=2)}
(usually @code{INTEGER*8})
subscript expressions when evaluating array references
on systems with pointers widers than @code{INTEGER(KIND=1)}
@ifclear USERVISONLY
@item
-@code{g77} no longer generates bad code
+@command{g77} no longer generates bad code
for an assignment to a @code{COMPLEX} variable or array
that partially overlaps one or more of the sources
of the same assignment
@ifclear USERVISONLY
@item
-Fix @code{g77} so it no longer crashes when compiling
+Fix @command{g77} so it no longer crashes when compiling
I/O statements using keywords that define @code{INTEGER} values,
such as @samp{IOSTAT=@var{j}},
where @var{j} is other than default @code{INTEGER}
@ifclear USERVISONLY
@item
-Fix @code{g77} so it properly handles @samp{DATA A/@var{rpt}*@var{val}/},
+Fix @command{g77} so it properly handles @samp{DATA A/@var{rpt}*@var{val}/},
where @var{rpt} is not default @code{INTEGER}, such as @code{INTEGER*2},
instead of producing a spurious diagnostic.
Also fix @samp{DATA (A(I),I=1,N)},
where @samp{N} is not default @code{INTEGER}
-to work instead of crashing @code{g77}.
+to work instead of crashing @command{g77}.
@end ifclear
@ifclear USERVISONLY
@item
-The @samp{-ax} option is now obeyed when compiling Fortran programs.
+The @option{-ax} option is now obeyed when compiling Fortran programs.
(It is passed to the @file{f771} driver.)
@end ifclear
@item
-The new @samp{-fbounds-check} option
-causes @code{g77} to compile run-time bounds checks
+The new @option{-fbounds-check} option
+causes @command{g77} to compile run-time bounds checks
of array subscripts, as well as of substring start and end points.
@item
@code{libg2c} now supports building as multilibbed library,
which provides better support for systems
-that require options such as @samp{-mieee}
+that require options such as @option{-mieee}
to work properly.
@item
Source file names with the suffixes @samp{.FOR} and @samp{.FPP}
-now are recognized by @code{g77}
+now are recognized by @command{g77}
as if they ended in @samp{.for} and @samp{.fpp}, respectively.
@item
of @code{libU77} intrinsics.
@item
-@code{g77} now warns about a reference to an intrinsic
+@command{g77} now warns about a reference to an intrinsic
that has an interface that is not Year 2000 (Y2K) compliant.
Also, @code{libg2c} has been changed to increase the likelihood
of catching references to the implementations of these intrinsics
@ifclear USERVISONLY
@item
-@code{g77} now warns about a reference to a function
+@command{g77} now warns about a reference to a function
when the corresponding @emph{subsequent} function program unit
disagrees with the reference concerning the type of the function.
@end ifclear
@item
-@samp{-fno-emulate-complex} is now the default option.
+@option{-fno-emulate-complex} is now the default option.
This should result in improved performance
of code that uses the @code{COMPLEX} data type.
@cindex double-precision performance
@cindex -malign-double
@item
-The @samp{-malign-double} option
+The @option{-malign-double} option
now reliably aligns @emph{all} double-precision variables and arrays
on Intel x86 targets.
@ifclear USERVISONLY
@item
-Even without the @samp{-malign-double} option,
-@code{g77} reliably aligns local double-precision variables
+Even without the @option{-malign-double} option,
+@command{g77} reliably aligns local double-precision variables
that are not in @code{EQUIVALENCE} areas
and not @code{SAVE}'d.
@end ifclear
@ifclear USERVISONLY
@item
-@code{g77} now open-codes (``inlines'') division of @code{COMPLEX} operands
+@command{g77} now open-codes (``inlines'') division of @code{COMPLEX} operands
instead of generating a run-time call to
the @code{libf2c} routines @code{c_div} or @code{z_div},
-unless the @samp{-Os} option is specified.
+unless the @option{-Os} option is specified.
@end ifclear
@item
-@code{g77} no longer generates code to maintain @code{errno},
+@command{g77} no longer generates code to maintain @code{errno},
a C-language concept,
when performing operations such as the @code{SqRt} intrinsic.
@ifclear USERVISONLY
@item
-@code{g77} developers can temporarily use
-the @samp{-fflatten-arrays} option
+@command{g77} developers can temporarily use
+the @option{-fflatten-arrays} option
to compare how the compiler handles code generation
using C-like constructs as compared to the
Fortran-like method constructs normally used.
@ifclear USERVISONLY
@item
-A substantial portion of the @code{g77} front end's code-generation component
+A substantial portion of the @command{g77} front end's code-generation component
was rewritten.
It now generates code using facilities more robustly supported
-by the @code{gcc} back end.
+by the @command{gcc} back end.
One effect of this rewrite is that some codes no longer produce
a spurious ``label @var{lab} used before containing binding contour''
message.
@end ifclear
@item
-Support for the @samp{-fugly} option has been removed.
+Support for the @option{-fugly} option has been removed.
@ifclear USERVISONLY
@item
@heading In 0.5.24 versus 0.5.23:
-There is no @code{g77} version 0.5.24 at this time,
+There is no @command{g77} version 0.5.24 at this time,
or planned.
0.5.24 is the version number designated for bug fixes and,
perhaps, some new features added,
to 0.5.23.
-Version 0.5.23 requires @code{gcc} 2.8.1,
+Version 0.5.23 requires @command{gcc} 2.8.1,
as 0.5.24 was planned to require.
Due to @code{EGCS} becoming @code{GCC}
there seems to be no need for an actual 0.5.24 release.
To reduce the confusion already resulting from use of 0.5.24
-to designate @code{g77} versions within @code{EGCS} versions 1.0 and 1.1,
-as well as in versions of @code{g77} documentation and notices
+to designate @command{g77} versions within @code{EGCS} versions 1.0 and 1.1,
+as well as in versions of @command{g77} documentation and notices
during that period,
-``mainline'' @code{g77} version numbering resumes
+``mainline'' @command{g77} version numbering resumes
at 0.5.25 with @code{GCC} 2.95 (@code{EGCS} 1.2),
skipping over 0.5.24 as a placeholder version number.
-To repeat, there is no @code{g77} 0.5.24, but there is now a 0.5.25.
+To repeat, there is no @command{g77} 0.5.24, but there is now a 0.5.25.
Please remain calm and return to your keypunch units.
@c 1999-03-15: EGCS 1.1.2 released.
whenever a @code{REWIND} is done.
(This bug was introduced in 0.5.23 and @code{egcs} 1.1 in
-@code{g77}'s version of @code{libf2c}.)
+@command{g77}'s version of @code{libf2c}.)
@item
Fix @code{libg2c} so it no longer crashes with a spurious diagnostic
upon doing any I/O following a direct formatted write.
(This bug was introduced in 0.5.23 and @code{egcs} 1.1 in
-@code{g77}'s version of @code{libf2c}.)
+@command{g77}'s version of @code{libf2c}.)
@item
-Fix @code{g77} so it no longer crashes compiling references
+Fix @command{g77} so it no longer crashes compiling references
to the @code{Rand} intrinsic on some systems.
@item
-Fix @code{g77} portion of installation process so it works
+Fix @command{g77} portion of installation process so it works
better on some systems
(those with shells requiring @samp{else true} clauses
on @code{if} constructs
@item
Assumed arrays with negative bounds
(such as @samp{REAL A(-1:*)})
-no longer elicit spurious diagnostics from @code{g77},
+no longer elicit spurious diagnostics from @command{g77},
even on systems with pointers having
different sizes than integers.
This bug is not known to have existed in any
-recent version of @code{gcc}.
+recent version of @command{gcc}.
It was introduced in an early release of @code{egcs}.
@end ifclear
and, in a subsequent program unit,
referencing that external as
an external function with a different type
-no longer crash @code{g77}.
+no longer crash @command{g77}.
@end ifclear
@ifclear USERVISONLY
@item
-@code{CASE DEFAULT} no longer crashes @code{g77}.
+@code{CASE DEFAULT} no longer crashes @command{g77}.
@end ifclear
@ifclear USERVISONLY
@item
-The @samp{-Wunused} option no longer issues a spurious
+The @option{-Wunused} option no longer issues a spurious
warning about the ``master'' procedure generated by
-@code{g77} for procedures containing @code{ENTRY} statements.
+@command{g77} for procedures containing @code{ENTRY} statements.
@end ifclear
@item
compile-time constant @code{INTEGER} expression.
@item
-Fix @code{g77} @samp{-g} option so procedures that
+Fix @command{g77} @option{-g} option so procedures that
use @code{ENTRY} can be stepped through, line by line,
-in @code{gdb}.
+in @command{gdb}.
@item
Allow any @code{REAL} argument to intrinsics
if present, is used.
@item
-@code{g77}'s version of @code{libf2c} separates out
+@command{g77}'s version of @code{libf2c} separates out
the setting of global state
(such as command-line arguments and signal handling)
from @file{main.o} into distinct, new library
@ifclear USERVISONLY
@item
-@code{g77} no longer installs the @file{f77} command
+@command{g77} no longer installs the @file{f77} command
and @file{f77.1} man page
-in the @file{/usr} or @file{/usr/local} heirarchy,
+in the @file{/usr} or @file{/usr/local} hierarchy,
even if the @file{f77-install-ok} file exists
in the source or build directory.
See the installation documentation for more information.
@ifclear USERVISONLY
@item
-@code{g77} no longer installs the @file{libf2c.a} library
+@command{g77} no longer installs the @file{libf2c.a} library
and @file{f2c.h} include file
-in the @file{/usr} or @file{/usr/local} heirarchy,
+in the @file{/usr} or @file{/usr/local} hierarchy,
even if the @file{f2c-install-ok} or @file{f2c-exists-ok} files exist
in the source or build directory.
See the installation documentation for more information.
@ifclear USERVISONLY
@item
-The @file{libf2c.a} library produced by @code{g77} has been
+The @file{libf2c.a} library produced by @command{g77} has been
renamed to @file{libg2c.a}.
-It is installed only in the @code{gcc} ``private''
-directory heirarchy, @file{gcc-lib}.
+It is installed only in the @command{gcc} ``private''
+directory hierarchy, @file{gcc-lib}.
This allows system administrators and users to choose which
version of the @code{libf2c} library from @code{netlib} they
wish to use on a case-by-case basis.
@ifclear USERVISONLY
@item
-The @file{f2c.h} include (header) file produced by @code{g77}
+The @file{f2c.h} include (header) file produced by @command{g77}
has been renamed to @file{g2c.h}.
-It is installed only in the @code{gcc} ``private''
-directory heirarchy, @file{gcc-lib}.
+It is installed only in the @command{gcc} ``private''
+directory hierarchy, @file{gcc-lib}.
This allows system administrators and users to choose which
version of the include file from @code{netlib} they
wish to use on a case-by-case basis.
@end ifclear
@item
-The @code{g77} command now expects the run-time library
+The @command{g77} command now expects the run-time library
to be named @code{libg2c.a} instead of @code{libf2c.a},
to ensure that a version other than the one built and
-installed as part of the same @code{g77} version is picked up.
+installed as part of the same @command{g77} version is picked up.
@ifclear USERVISONLY
@item
During the configuration and build process,
-@code{g77} creates subdirectories it needs only as it
+@command{g77} creates subdirectories it needs only as it
needs them.
Other cleaning up of the configuration and build process
has been performed as well.
@ifclear USERVISONLY
@item
@code{install-info} now used to update the directory of
-Info documentation to contain an entry for @code{g77}
+Info documentation to contain an entry for @command{g77}
(during installation).
@end ifclear
@end itemize
@c 1998-09-03: EGCS 1.1 released.
-@heading In @code{EGCS} 1.1 versus @code{g77} 0.5.23:
+@heading In @code{EGCS} 1.1 versus @command{g77} 0.5.23:
@itemize @bullet
@ifclear USERVISONLY
@cindex DNRM2
@cindex -O2
@item
Fix a code-generation bug that afflicted
-Intel x86 targets when @samp{-O2} was specified
+Intel x86 targets when @option{-O2} was specified
compiling, for example, an old version of
the @code{DNRM2} routine.
@ifclear USERVISONLY
@item
-@code{g77} no longer produces incorrect code
+@command{g77} no longer produces incorrect code
and initial values
for @code{EQUIVALENCE} and @code{COMMON}
aggregates that, due to ``unnatural'' ordering of members
@ifclear USERVISONLY
@item
-Fix @code{g77} crash compiling code
+Fix @command{g77} crash compiling code
containing the construct @samp{CMPLX(0.)} or similar.
@end ifclear
@ifclear USERVISONLY
@item
-@code{g77} no longer crashes when compiling code
+@command{g77} no longer crashes when compiling code
containing specification statements such as
@samp{INTEGER(KIND=7) PTR}.
@end ifclear
@ifclear USERVISONLY
@item
-@code{g77} no longer crashes when compiling code
+@command{g77} no longer crashes when compiling code
such as @samp{J = SIGNAL(1, 2)}.
@end ifclear
@item
-@code{g77} now treats @samp{%LOC(@var{expr})} and
+@command{g77} now treats @samp{%LOC(@var{expr})} and
@samp{LOC(@var{expr})} as ``ordinary'' expressions
when they are used as arguments in procedure calls.
This change applies only to global (filewide) analysis,
making it consistent with
-how @code{g77} actually generates code
+how @command{g77} actually generates code
for these cases.
-Previously, @code{g77} treated these expressions
+Previously, @command{g77} treated these expressions
as denoting special ``pointer'' arguments
for the purposes of filewide analysis.
@ifclear USERVISONLY
@item
-Fix @code{g77} crash
+Fix @command{g77} crash
(or apparently infinite run-time)
when compiling certain complicated expressions
involving @code{COMPLEX} arithmetic
@item
Align static double-precision variables and arrays
on Intel x86 targets
-regardless of whether @samp{-malign-double} is specified.
+regardless of whether @option{-malign-double} is specified.
Generally, this affects only local variables and arrays
having the @code{SAVE} attribute
or given initial values via @code{DATA}.
@item
-The @code{g77} driver now ensures that @samp{-lg2c}
+The @command{g77} driver now ensures that @option{-lg2c}
is specified in the link phase prior to any
-occurrence of @samp{-lm}.
+occurrence of @option{-lm}.
This prevents accidentally linking to a routine
-in the SunOS4 @samp{-lm} library
+in the SunOS4 @option{-lm} library
when the generated code wants to link to the one
in @code{libf2c} (@code{libg2c}).
@item
-@code{g77} emits more debugging information when
-@samp{-g} is used.
+@command{g77} emits more debugging information when
+@option{-g} is used.
This new information allows, for example,
-@kbd{which __g77_length_a} to be used in @code{gdb}
+@kbd{which __g77_length_a} to be used in @command{gdb}
to determine the type of the phantom length argument
supplied with @code{CHARACTER} variables.
@itemize @bullet
@item
This release contains several regressions against
-version 0.5.22 of @code{g77}, due to using the
-``vanilla'' @code{gcc} back end instead of patching
+version 0.5.22 of @command{g77}, due to using the
+``vanilla'' @command{gcc} back end instead of patching
it to fix a few bugs and improve performance in a
few cases.
Features that have been dropped from this version
-of @code{g77} due to their being implemented
-via @code{g77}-specific patches to the @code{gcc}
+of @command{g77} due to their being implemented
+via @command{g77}-specific patches to the @command{gcc}
back end in previous releases include:
@itemize @minus
@item
Support for @code{__restrict__} keyword,
-the options @samp{-fargument-alias}, @samp{-fargument-noalias},
-and @samp{-fargument-noalias-global},
+the options @option{-fargument-alias}, @option{-fargument-noalias},
+and @option{-fargument-noalias-global},
and the corresponding alias-analysis code.
(@code{egcs} has the alias-analysis
code, but not the @code{__restrict__} keyword.
-@code{egcs} @code{g77} users benefit from the alias-analysis
+@code{egcs} @command{g77} users benefit from the alias-analysis
code despite the lack of the @code{__restrict__} keyword,
which is a C-language construct.)
@item
Support for the GNU compiler options
-@samp{-fmove-all-movables},
-@samp{-freduce-all-givs},
-and @samp{-frerun-loop-opt}.
+@option{-fmove-all-movables},
+@option{-freduce-all-givs},
+and @option{-frerun-loop-opt}.
(@code{egcs} supports these options.
-@code{g77} users of @code{egcs} benefit from them even if
+@command{g77} users of @code{egcs} benefit from them even if
they are not explicitly specified,
-because the defaults are optimized for @code{g77} users.)
+because the defaults are optimized for @command{g77} users.)
@item
-Support for the @samp{-W} option warning about
+Support for the @option{-W} option warning about
integer division by zero.
@item
-The Intel x86-specific option @samp{-malign-double}
+The Intel x86-specific option @option{-malign-double}
applying to stack-allocated data
as well as statically-allocate data.
@end itemize
@ifclear USERVISONLY
Note that the @file{gcc/f/gbe/} subdirectory has been removed
-from this distribution as a result of @code{g77} no longer
-including patches for the @code{gcc} back end.
+from this distribution as a result of @command{g77} no longer
+including patches for the @command{gcc} back end.
@end ifclear
@ifclear USERVISONLY
@end ifclear
@item
-Support @code{gcc} version 2.8,
-and remove support for prior versions of @code{gcc}.
+Support @command{gcc} version 2.8,
+and remove support for prior versions of @command{gcc}.
@cindex -@w{}-driver option
-@cindex @code{g77} options, -@w{}-driver
+@cindex @command{g77} options, -@w{}-driver
@cindex options, -@w{}-driver
@item
-Remove support for the @samp{--driver} option,
-as @code{g77} now does all the driving,
-just like @code{gcc}.
+Remove support for the @option{--driver} option,
+as @command{g77} now does all the driving,
+just like @command{gcc}.
@ifclear USERVISONLY
@item
-@code{CASE DEFAULT} no longer crashes @code{g77}.
+@code{CASE DEFAULT} no longer crashes @command{g77}.
@end ifclear
@ifclear USERVISONLY
and, in a subsequent program unit,
referencing that external as
an external function with a different type
-no longer crash @code{g77}.
+no longer crash @command{g77}.
@end ifclear
@ifclear USERVISONLY
@item
-@code{g77} no longer installs the @file{f77} command
+@command{g77} no longer installs the @file{f77} command
and @file{f77.1} man page
-in the @file{/usr} or @file{/usr/local} heirarchy,
+in the @file{/usr} or @file{/usr/local} hierarchy,
even if the @file{f77-install-ok} file exists
in the source or build directory.
See the installation documentation for more information.
@ifclear USERVISONLY
@item
-@code{g77} no longer installs the @file{libf2c.a} library
+@command{g77} no longer installs the @file{libf2c.a} library
and @file{f2c.h} include file
-in the @file{/usr} or @file{/usr/local} heirarchy,
+in the @file{/usr} or @file{/usr/local} hierarchy,
even if the @file{f2c-install-ok} or @file{f2c-exists-ok} files exist
in the source or build directory.
See the installation documentation for more information.
@ifclear USERVISONLY
@item
-The @file{libf2c.a} library produced by @code{g77} has been
+The @file{libf2c.a} library produced by @command{g77} has been
renamed to @file{libg2c.a}.
-It is installed only in the @code{gcc} ``private''
-directory heirarchy, @file{gcc-lib}.
+It is installed only in the @command{gcc} ``private''
+directory hierarchy, @file{gcc-lib}.
This allows system administrators and users to choose which
version of the @code{libf2c} library from @code{netlib} they
wish to use on a case-by-case basis.
@ifclear USERVISONLY
@item
-The @file{f2c.h} include (header) file produced by @code{g77}
+The @file{f2c.h} include (header) file produced by @command{g77}
has been renamed to @file{g2c.h}.
-It is installed only in the @code{gcc} ``private''
-directory heirarchy, @file{gcc-lib}.
+It is installed only in the @command{gcc} ``private''
+directory hierarchy, @file{gcc-lib}.
This allows system administrators and users to choose which
version of the include file from @code{netlib} they
wish to use on a case-by-case basis.
@end ifclear
@item
-The @code{g77} command now expects the run-time library
+The @command{g77} command now expects the run-time library
to be named @code{libg2c.a} instead of @code{libf2c.a},
to ensure that a version other than the one built and
-installed as part of the same @code{g77} version is picked up.
+installed as part of the same @command{g77} version is picked up.
@ifclear USERVISONLY
@item
-The @samp{-Wunused} option no longer issues a spurious
+The @option{-Wunused} option no longer issues a spurious
warning about the ``master'' procedure generated by
-@code{g77} for procedures containing @code{ENTRY} statements.
+@command{g77} for procedures containing @code{ENTRY} statements.
@end ifclear
@item
-@code{g77}'s version of @code{libf2c} separates out
+@command{g77}'s version of @code{libf2c} separates out
the setting of global state
(such as command-line arguments and signal handling)
from @file{main.o} into distinct, new library
@ifclear USERVISONLY
@item
During the configuration and build process,
-@code{g77} creates subdirectories it needs only as it
+@command{g77} creates subdirectories it needs only as it
needs them, thus avoiding unnecessary creation of, for example,
@file{stage1/f/runtime} when doing a non-bootstrap build.
Other cleaning up of the configuration and build process
@ifclear USERVISONLY
@item
@code{install-info} now used to update the directory of
-Info documentation to contain an entry for @code{g77}
+Info documentation to contain an entry for @command{g77}
(during installation).
@end ifclear
@cindex -O2
@item
Fix a code-generation bug that afflicted
-Intel x86 targets when @samp{-O2} was specified
+Intel x86 targets when @option{-O2} was specified
compiling, for example, an old version of
the @code{DNRM2} routine.
@ifclear USERVISONLY
@item
-Fix @code{g77} version of @code{libf2c} so it no longer
+Fix @command{g77} version of @code{libf2c} so it no longer
produces a spurious @samp{I/O recursion} diagnostic at run time
when an I/O operation (such as @samp{READ *,I}) is interrupted
in a manner that causes the program to be terminated
@ifclear USERVISONLY
@item
-Fix @code{g77} crash triggered by @code{CASE} statement with
+Fix @command{g77} crash triggered by @code{CASE} statement with
an omitted lower or upper bound.
@end ifclear
@ifclear USERVISONLY
@item
-Fix @code{g77} crash compiling references to @code{CPU_Time}
+Fix @command{g77} crash compiling references to @code{CPU_Time}
intrinsic.
@end ifclear
@ifclear USERVISONLY
@item
-Fix @code{g77} crash
+Fix @command{g77} crash
(or apparently infinite run-time)
when compiling certain complicated expressions
involving @code{COMPLEX} arithmetic
@ifclear USERVISONLY
@item
-Fix @code{g77} crash on statements such as
+Fix @command{g77} crash on statements such as
@samp{PRINT *, (REAL(Z(I)),I=1,2)}, where
@samp{Z} is @code{DOUBLE COMPLEX}.
@end ifclear
@ifclear USERVISONLY
@item
-Fix a @code{g++} crash.
+Fix a @command{g++} crash.
@end ifclear
@item
compile-time constant @code{INTEGER} expression.
@item
-Fix @code{g77} @samp{-g} option so procedures that
+Fix @command{g77} @option{-g} option so procedures that
use @code{ENTRY} can be stepped through, line by line,
-in @code{gdb}.
+in @command{gdb}.
@ifclear USERVISONLY
@item
-Fix a profiling-related bug in @code{gcc} back end for
+Fix a profiling-related bug in @command{gcc} back end for
Intel x86 architecture.
@end ifclear
if present, is used.
@item
-Rename the @code{gcc} keyword @code{restrict} to
+Rename the @command{gcc} keyword @code{restrict} to
@code{__restrict__}, to avoid rejecting valid, existing,
C programs.
Support for @code{restrict} is now more like support
@ifclear USERVISONLY
@item
-Fix @samp{-fpedantic} to not reject procedure invocations
+Fix @option{-fpedantic} to not reject procedure invocations
such as @samp{I=J()} and @samp{CALL FOO()}.
@end ifclear
@item
-Fix @samp{-fugly-comma} to affect invocations of
+Fix @option{-fugly-comma} to affect invocations of
only external procedures.
Restore rejection of gratuitous trailing omitted
arguments to intrinsics, as in @samp{I=MAX(3,4,,)}.
@item
-Fix compiler so it accepts @samp{-fgnu-intrinsics-*} and
-@samp{-fbadu77-intrinsics-*} options.
+Fix compiler so it accepts @option{-fgnu-intrinsics-*} and
+@option{-fbadu77-intrinsics-*} options.
@ifclear USERVISONLY
@item
active format string is limited to the string,
with no trailing garbage being printed.
-(Unlike @code{f2c}, @code{g77} did not append
+(Unlike @command{f2c}, @command{g77} did not append
a null byte to its compiled form of every
format string specified via a @code{FORMAT} statement.
-However, @code{f2c} would exhibit the problem
+However, @command{f2c} would exhibit the problem
anyway for a statement like @samp{PRINT '(I)garbage', 1}
by printing @samp{(I)garbage} as the format string.)
@end ifclear
@itemize @bullet
@ifclear USERVISONLY
@item
-Fix @code{g77} crash triggered by @code{CASE} statement with
+Fix @command{g77} crash triggered by @code{CASE} statement with
an omitted lower or upper bound.
@end ifclear
@ifclear USERVISONLY
@item
-Fix @code{g77} crash on statements such as
+Fix @command{g77} crash on statements such as
@samp{PRINT *, (REAL(Z(I)),I=1,2)}, where
@samp{Z} is @code{DOUBLE COMPLEX}.
@end ifclear
@cindex -fPIC option
@cindex options, -fPIC
@item
-Fix @samp{-fPIC} (such as compiling for ELF targets)
+Fix @option{-fPIC} (such as compiling for ELF targets)
on the Intel x86 architecture target
so invalid assembler code is no longer produced.
@end ifclear
@ifclear USERVISONLY
@item
-Fix @samp{-fpedantic} to not reject procedure invocations
+Fix @option{-fpedantic} to not reject procedure invocations
such as @samp{I=J()} and @samp{CALL FOO()}.
@end ifclear
@ifclear USERVISONLY
@item
-Fix @samp{-fugly-comma} to affect invocations of
+Fix @option{-fugly-comma} to affect invocations of
only external procedures.
Restore rejection of gratuitous trailing omitted
arguments to intrinsics, as in @samp{I=MAX(3,4,,)}.
@end ifclear
@item
-Fix compiler so it accepts @samp{-fgnu-intrinsics-*} and
-@samp{-fbadu77-intrinsics-*} options.
+Fix compiler so it accepts @option{-fgnu-intrinsics-*} and
+@option{-fbadu77-intrinsics-*} options.
@end itemize
@c 1998-01-06: EGCS 1.0.1 released.
@end ifclear
@c 1997-12-03: EGCS 1.0 released.
-@heading In @code{EGCS} 1.0 versus @code{g77} 0.5.21:
+@heading In @code{EGCS} 1.0 versus @command{g77} 0.5.21:
@itemize @bullet
@item
Version 1.0 of @code{egcs}
contains several regressions against
-version 0.5.21 of @code{g77},
+version 0.5.21 of @command{g77},
due to using the
-``vanilla'' @code{gcc} back end instead of patching
+``vanilla'' @command{gcc} back end instead of patching
it to fix a few bugs and improve performance in a
few cases.
Features that have been dropped from this version
-of @code{g77} due to their being implemented
-via @code{g77}-specific patches to the @code{gcc}
+of @command{g77} due to their being implemented
+via @command{g77}-specific patches to the @command{gcc}
back end in previous releases include:
@itemize @minus
Support for the C-language @code{restrict} keyword.
@item
-Support for the @samp{-W} option warning about
+Support for the @option{-W} option warning about
integer division by zero.
@item
-The Intel x86-specific option @samp{-malign-double}
+The Intel x86-specific option @option{-malign-double}
applying to stack-allocated data
as well as statically-allocate data.
@end itemize
@ifclear USERVISONLY
Note that the @file{gcc/f/gbe/} subdirectory has been removed
-from this distribution as a result of @code{g77}
+from this distribution as a result of @command{g77}
being fully integrated with
-the @code{egcs} variant of the @code{gcc} back end.
+the @code{egcs} variant of the @command{gcc} back end.
@end ifclear
@ifclear USERVISONLY
@item
@c Toon Moene discovered these.
Some Fortran code, miscompiled
-by @code{g77} built on @code{gcc} version 2.8.1
+by @command{g77} built on @command{gcc} version 2.8.1
on m68k-next-nextstep3 configurations
-when using the @samp{-O2} option,
+when using the @option{-O2} option,
is now compiled correctly.
It is believed that a C function known to miscompile
on that configuration
@ifclear USERVISONLY
@item
-Remove support for non-@code{egcs} versions of @code{gcc}.
+Remove support for non-@code{egcs} versions of @command{gcc}.
@end ifclear
@cindex -@w{}-driver option
-@cindex @code{g77} options, -@w{}-driver
+@cindex @command{g77} options, -@w{}-driver
@cindex options, -@w{}-driver
@item
-Remove support for the @samp{--driver} option,
-as @code{g77} now does all the driving,
-just like @code{gcc}.
+Remove support for the @option{--driver} option,
+as @command{g77} now does all the driving,
+just like @command{gcc}.
@item
Allow any numeric argument to intrinsics
active format string is limited to the string,
with no trailing garbage being printed.
-(Unlike @code{f2c}, @code{g77} did not append
+(Unlike @command{f2c}, @command{g77} did not append
a null byte to its compiled form of every
format string specified via a @code{FORMAT} statement.
However, @code{f2c} would exhibit the problem
@item
Fix a code-generation bug introduced by 0.5.20
caused by loop unrolling (by specifying
-@samp{-funroll-loops} or similar).
+@option{-funroll-loops} or similar).
This bug afflicted all code compiled by
-version 2.7.2.2.f.2 of @code{gcc} (C, C++,
+version 2.7.2.2.f.2 of @command{gcc} (C, C++,
Fortran, and so on).
@end ifclear
@code{DATA} statement that follows
the first executable statement (or is
treated as an executable-context statement
-as a result of using the @samp{-fpedantic}
+as a result of using the @option{-fpedantic}
option).
@end ifclear
@ifclear USERVISONLY
@item
-Fix a compiler crash that occured when an
+Fix a compiler crash that occurred when an
integer division by a constant zero is detected.
-Instead, when the @samp{-W} option is specified,
-the @code{gcc} back end issues a warning about such a case.
+Instead, when the @option{-W} option is specified,
+the @command{gcc} back end issues a warning about such a case.
This bug afflicted all code compiled by
-version 2.7.2.2.f.2 of @code{gcc} (C, C++,
+version 2.7.2.2.f.2 of @command{gcc} (C, C++,
Fortran, and so on).
@end ifclear
@ifset USERVISONLY
@item
-When the @samp{-W} option is specified, @code{gcc}, @code{g77},
-and other GNU compilers that incorporate the @code{gcc}
-back end as modified by @code{g77}, issue
+When the @option{-W} option is specified, @command{gcc}, @command{g77},
+and other GNU compilers that incorporate the @command{gcc}
+back end as modified by @command{g77}, issue
a warning about integer division by constant zero.
@end ifset
the standard.
@end ifclear
-@c @code{g77}'s version of @code{libf2c} has been modified
+@c @command{g77}'s version of @code{libf2c} has been modified
@c so that the external names of library's procedures do not
@c conflict with names used for Fortran procedures compiled
-@c by @code{g77}.
+@c by @command{g77}.
@c An additional layer of jacket procedures has been added
@c to @code{libf2c} to map the old names to the new names,
@c for automatic use by programs that interface to the
@c library procedures via the external-procedure mechanism.
@c
@c For example, the intrinsic @code{FPUTC} previously was
-@c implemented by @code{g77} as a call to the @code{libf2c}
+@c implemented by @command{g77} as a call to the @code{libf2c}
@c routine @code{fputc_}.
@c This would conflict with a Fortran procedure named @code{FPUTC}
@c (using default compiler options), and this conflict
@ifclear USERVISONLY
@item
Place automatic arrays on the stack, even if
-@code{SAVE} or the @samp{-fno-automatic} option
+@code{SAVE} or the @option{-fno-automatic} option
is in effect.
This avoids a compiler crash in some cases.
@end ifclear
@ifclear USERVISONLY
@item
-The @samp{-malign-double} option now reliably aligns
+The @option{-malign-double} option now reliably aligns
@code{DOUBLE PRECISION} optimally on Pentium and
-Pentium Pro architectures (586 and 686 in @code{gcc}).
+Pentium Pro architectures (586 and 686 in @command{gcc}).
@end ifclear
@item
-New option @samp{-Wno-globals} disables warnings
+New option @option{-Wno-globals} disables warnings
about ``suspicious'' use of a name both as a global
name and as the implicit name of an intrinsic, and
warnings about disagreements over the number or natures of
natures of the procedures themselves.
The default is to issue such warnings, which are
-new as of this version of @code{g77}.
+new as of this version of @command{g77}.
@item
-New option @samp{-fno-globals} disables diagnostics
+New option @option{-fno-globals} disables diagnostics
about potentially fatal disagreements
analysis problems, such as disagreements over the
number or natures of arguments passed to global
The default is to issue such diagnostics and flag
the compilation as unsuccessful.
With this option, the diagnostics are issued as
-warnings, or, if @samp{-Wno-globals} is specified,
+warnings, or, if @option{-Wno-globals} is specified,
are not issued at all.
This option also disables inlining of global procedures,
@ifclear USERVISONLY
@item
-Fix parsing bug whereby @code{g77} rejected a
+Fix parsing bug whereby @command{g77} rejected a
second initialization specification immediately
following the first's closing @samp{/} without
an intervening comma in a @code{DATA} statement,
@ifclear USERVISONLY
@item
-Improve performance of the @code{gcc} back end so
+Improve performance of the @command{gcc} back end so
certain complicated expressions involving @code{COMPLEX}
arithmetic (especially multiplication) don't appear to
take forever to compile.
@ifclear USERVISONLY
@item
-Fix a couple of profiling-related bugs in @code{gcc}
+Fix a couple of profiling-related bugs in @command{gcc}
back end.
@end ifclear
@ifclear USERVISONLY
@item
-Include some other @code{gcc} fixes that seem useful in
-@code{g77}'s version of @code{gcc}.
+Include some other @command{gcc} fixes that seem useful in
+@command{g77}'s version of @command{gcc}.
(See @file{gcc/ChangeLog} for details---compare it
to that file in the vanilla @code{gcc-2.7.2.3.tar.gz}
distribution.)
@end ifclear
@item
-Add options @samp{-fbadu77-intrinsics-delete},
-@samp{-fbadu77-intrinsics-hide}, and so on.
+Add options @option{-fbadu77-intrinsics-delete},
+@option{-fbadu77-intrinsics-hide}, and so on.
@ifclear USERVISONLY
@item
@ifclear USERVISONLY
@item
-@code{g77} and @code{gcc} now do a somewhat better
+@command{g77} and @command{gcc} now do a somewhat better
job detecting and diagnosing arrays that are too
large to handle before these cause diagnostics
during the assembler or linker phase, a compiler
@ifclear USERVISONLY
@item
-Add support for @code{restrict} keyword in @code{gcc}
+Add support for @code{restrict} keyword in @command{gcc}
front end.
@end ifclear
@ifclear USERVISONLY
@item
-Support @code{gcc} version 2.7.2.3
-(modified by @code{g77} into version 2.7.2.3.f.1),
+Support @command{gcc} version 2.7.2.3
+(modified by @command{g77} into version 2.7.2.3.f.1),
and remove
-support for prior versions of @code{gcc}.
+support for prior versions of @command{gcc}.
@end ifclear
@ifclear USERVISONLY
@item
-Incorporate GNAT's patches to the @code{gcc} back
-end into @code{g77}'s, so GNAT users do not need
-to apply GNAT's patches to build both GNAT and @code{g77}
+Incorporate GNAT's patches to the @command{gcc} back
+end into @command{g77}'s, so GNAT users do not need
+to apply GNAT's patches to build both GNAT and @command{g77}
from the same source tree.
@end ifclear
@ifclear USERVISONLY
@item
-Modify @code{make} rules and related code so that
+Modify @command{make} rules and related code so that
generation of Info documentation doesn't require
-compilation using @code{gcc}.
+compilation using @command{gcc}.
Now, any ANSI C compiler should be adequate to
-produce the @code{g77} documentation (in particular,
+produce the @command{g77} documentation (in particular,
the tables of intrinsics) from scratch.
@end ifclear
@ifclear USERVISONLY
@item
-Support @samp{*f771} entry in @code{gcc} @file{specs} file.
+Support @samp{*f771} entry in @command{gcc} @file{specs} file.
@end ifclear
@ifclear USERVISONLY
@item
-Fix typo in @code{make} rule @code{g77-cross}, used only for
+Fix typo in @command{make} rule @command{g77-cross}, used only for
cross-compiling.
@end ifclear
@ifclear USERVISONLY
@item
-Change @code{gcc} to unroll loops only during the last
+Change @command{gcc} to unroll loops only during the last
invocation (of as many as two invocations) of loop
optimization.
@end ifclear
@ifclear USERVISONLY
@item
-Improve handling of @samp{-fno-f2c} so that code that
+Improve handling of @option{-fno-f2c} so that code that
attempts to pass an intrinsic as an actual argument,
such as @samp{CALL FOO(ABS)}, is rejected due to the fact
that the run-time-library routine is, effectively,
-compiled with @samp{-ff2c} in effect.
+compiled with @option{-ff2c} in effect.
@end ifclear
@ifclear USERVISONLY
@item
-Fix @code{g77} driver to recognize @samp{-fsyntax-only}
-as an option that inhibits linking, just like @samp{-c} or
-@samp{-S}, and to recognize and properly handle the
-@samp{-nostdlib}, @samp{-M}, @samp{-MM}, @samp{-nodefaultlibs},
-and @samp{-Xlinker} options.
+Fix @command{g77} driver to recognize @option{-fsyntax-only}
+as an option that inhibits linking, just like @option{-c} or
+@option{-S}, and to recognize and properly handle the
+@option{-nostdlib}, @option{-M}, @option{-MM}, @option{-nodefaultlibs},
+and @option{-Xlinker} options.
@end ifclear
@ifclear USERVISONLY
@end ifclear
@item
-@code{g77} driver now prints version information (such as produced
+@command{g77} driver now prints version information (such as produced
by @kbd{g77 -v}) to @code{stderr} instead of @code{stdout}.
@item
The @samp{.r} suffix now designates a Ratfor source file,
-to be preprocessed via the @code{ratfor} command, available
+to be preprocessed via the @command{ratfor} command, available
separately.
@ifclear USERVISONLY
@item
-Fix some aspects of how @code{gcc} determines what kind of
+Fix some aspects of how @command{gcc} determines what kind of
system is being configured and what kinds are supported.
For example, GNU Linux/Alpha ELF systems now are directly
supported.
@item
Include all pertinent files for @code{libf2c} that come
from @code{netlib.bell-labs.com}; give any such files
-that aren't quite accurate in @code{g77}'s version of
+that aren't quite accurate in @command{g77}'s version of
@code{libf2c} the suffix @samp{.netlib}.
@end ifclear
@heading In 0.5.20:
@itemize @bullet
@item
-The @samp{-fno-typeless-boz} option is now the default.
+The @option{-fno-typeless-boz} option is now the default.
This option specifies that non-decimal-radix
constants using the prefixed-radix form (such as @samp{Z'1234'})
are to be interpreted as @code{INTEGER(KIND=1)} constants.
-Specify @samp{-ftypeless-boz} to cause such
+Specify @option{-ftypeless-boz} to cause such
constants to be interpreted as typeless.
-(Version 0.5.19 introduced @samp{-fno-typeless-boz} and
+(Version 0.5.19 introduced @option{-fno-typeless-boz} and
its inverse.)
@ifset DOC-G77
@xref{Fortran Dialect Options,,Options Controlling Fortran Dialect},
-for information on the @samp{-ftypeless-boz} option.
+for information on the @option{-ftypeless-boz} option.
@end ifset
@item
-Options @samp{-ff90-intrinsics-enable} and
-@samp{-fvxt-intrinsics-enable} now are the
+Options @option{-ff90-intrinsics-enable} and
+@option{-fvxt-intrinsics-enable} now are the
defaults.
Some programs might use names that clash with
intrinsic names defined (and now enabled) by these
options or by the new @code{libU77} intrinsics.
Users of such programs might need to compile them
-differently (using, for example, @samp{-ff90-intrinsics-disable})
+differently (using, for example, @option{-ff90-intrinsics-disable})
or, better yet, insert appropriate @code{EXTERNAL}
statements specifying that these names are not intended
to be names of intrinsics.
@emph{Note:} If you have code that depends on the behavior
of @code{libf2c} when built with @code{ALWAYS_FLUSH} defined,
you will have to modify @code{libf2c} accordingly before
-building it from this and future versions of @code{g77}.
+building it from this and future versions of @command{g77}.
@ifset DOC-G77
@xref{Output Assumed To Flush}, for more information.
@item
Dave Love's implementation of @code{libU77} has been
added to the version of @code{libf2c} distributed with
-and built as part of @code{g77}.
-@code{g77} now knows about the routines in this library
+and built as part of @command{g77}.
+@command{g77} now knows about the routines in this library
as intrinsics.
@item
-New option @samp{-fvxt} specifies that the
+New option @option{-fvxt} specifies that the
source file is written in VXT Fortran, instead of GNU Fortran.
@ifset DOC-G77
@xref{VXT Fortran}, for more information on the constructs
-recognized when the @samp{-fvxt} option is specified.
+recognized when the @option{-fvxt} option is specified.
@end ifset
@item
-The @samp{-fvxt-not-f90} option has been deleted,
-along with its inverse, @samp{-ff90-not-vxt}.
+The @option{-fvxt-not-f90} option has been deleted,
+along with its inverse, @option{-ff90-not-vxt}.
If you used one of these deleted options, you should
re-read the pertinent documentation to determine which
options, if any, are appropriate for compiling your
-code with this version of @code{g77}.
+code with this version of @command{g77}.
@ifset DOC-G77
@xref{Other Dialects}, for more information.
@end ifset
@item
-The @samp{-fugly} option now issues a warning, as it
+The @option{-fugly} option now issues a warning, as it
likely will be removed in a future version.
-(Enabling all the @samp{-fugly-*} options is unlikely
+(Enabling all the @option{-fugly-*} options is unlikely
to be feasible, or sensible, in the future,
so users should learn to specify only those
-@samp{-fugly-*} options they really need for a
+@option{-fugly-*} options they really need for a
particular source file.)
@item
-The @samp{-fugly-assumed} option, introduced in
+The @option{-fugly-assumed} option, introduced in
version 0.5.19, has been changed to
better accommodate old and new code.
@ifclear USERVISONLY
@item
-Make a number of fixes to the @code{g77} front end and
-the @code{gcc} back end to better support Alpha (AXP)
+Make a number of fixes to the @command{g77} front end and
+the @command{gcc} back end to better support Alpha (AXP)
machines.
This includes providing at least one bug-fix to the
-@code{gcc} back end for Alphas.
+@command{gcc} back end for Alphas.
@end ifclear
@item
(often referred to as @code{INTEGER*4}).
@item
-Emulate @code{COMPLEX} arithmetic in the @code{g77} front
+Emulate @code{COMPLEX} arithmetic in the @command{g77} front
end, to avoid bugs in @code{complex} support in the
-@code{gcc} back end.
-New option @samp{-fno-emulate-complex}
-causes @code{g77} to revert the 0.5.19 behavior.
+@command{gcc} back end.
+New option @option{-fno-emulate-complex}
+causes @command{g77} to revert the 0.5.19 behavior.
@ifclear USERVISONLY
@item
Fix bug whereby @samp{REAL A(1)}, for example, caused
-a compiler crash if @samp{-fugly-assumed} was in effect
+a compiler crash if @option{-fugly-assumed} was in effect
and @var{A} was a local (automatic) array.
That case is no longer affected by the new
-handling of @samp{-fugly-assumed}.
+handling of @option{-fugly-assumed}.
@end ifclear
@ifclear USERVISONLY
@item
-Fix @code{g77} command driver so that @samp{g77 -o foo.f}
+Fix @command{g77} command driver so that @samp{g77 -o foo.f}
no longer deletes @file{foo.f} before issuing other
-diagnostics, and so the @samp{-x} option is properly
+diagnostics, and so the @option{-x} option is properly
handled.
@end ifclear
@ifclear USERVISONLY
@item
-Enable inlining of subroutines and functions by the @code{gcc}
+Enable inlining of subroutines and functions by the @command{gcc}
back end.
-This works as it does for @code{gcc} itself---program units
+This works as it does for @command{gcc} itself---program units
may be inlined for invocations that follow them in the same
program unit, as long as the appropriate compile-time
options are specified.
This can result in faster and/or smaller programs when
compiling with optimization enabled, though on some
-systems this effect is observed only when @samp{-fforce-addr}
+systems this effect is observed only when @option{-fforce-addr}
also is specified.
-New options @samp{-falias-check}, @samp{-fargument-alias},
-@samp{-fargument-noalias},
-and @samp{-fno-argument-noalias-global} control the
-way @code{g77} handles potential aliasing.
+New options @option{-falias-check}, @option{-fargument-alias},
+@option{-fargument-noalias},
+and @option{-fno-argument-noalias-global} control the
+way @command{g77} handles potential aliasing.
@ifset DOC-G77
@xref{Aliasing Assumed To Work}, for detailed information on why the
new defaults might result in some programs no longer working the way they
-did when compiled by previous versions of @code{g77}.
+did when compiled by previous versions of @command{g77}.
@end ifset
@ifclear USERVISONLY
@ifclear USERVISONLY
@item
The bug-fix for 0.5.19.1 has been re-done.
-The @code{g77} compiler has been changed back to
+The @command{g77} compiler has been changed back to
assume @code{libf2c} has no aliasing problems in
its implementations of the @code{COMPLEX} (and
@code{DOUBLE COMPLEX}) intrinsics.
@emph{Note:} This change requires version 0.5.20 of
@code{libf2c}, at least, when linking code produced
-by any versions of @code{g77} other than 0.5.19.1.
+by any versions of @command{g77} other than 0.5.19.1.
Use @samp{g77 -v} to determine the version numbers
of the @code{libF77}, @code{libI77}, and @code{libU77}
components of the @code{libf2c} library.
@end ifclear
@item
-New option @samp{-fugly-assign} specifies that the
+New option @option{-fugly-assign} specifies that the
same memory locations are to be used to hold the
values assigned by both statements @samp{I = 3} and
@samp{ASSIGN 10 TO I}, for example.
-(Normally, @code{g77} uses a separate memory location
+(Normally, @command{g77} uses a separate memory location
to hold assigned statement labels.)
@ifset DOC-G77
Change approach to building @code{libf2c} archive
(@file{libf2c.a}) so that members are added to it
only when truly necessary, so the user that installs
-an already-built @code{g77} doesn't need to have write
+an already-built @command{g77} doesn't need to have write
access to the build tree (whereas the user doing the
build might not have access to install new software
on the system).
@ifclear USERVISONLY
@item
-Support @code{gcc} version 2.7.2.2
-(modified by @code{g77} into version 2.7.2.2.f.2),
+Support @command{gcc} version 2.7.2.2
+(modified by @command{g77} into version 2.7.2.2.f.2),
and remove
-support for prior versions of @code{gcc}.
+support for prior versions of @command{gcc}.
@end ifclear
@ifclear USERVISONLY
@ifclear USERVISONLY
@item
-Improve general build procedures for @code{g77},
+Improve general build procedures for @command{g77},
fixing minor bugs (such as deletion of any file
named @file{f771} in the parent directory of @code{gcc/}).
@end ifclear
Enable full support of @code{INTEGER(KIND=2)}
(often referred to as @code{INTEGER*8})
available in
-@code{libf2c} and @file{f2c.h} so that @code{f2c} users
-may make full use of its features via the @code{g77}
+@code{libf2c} and @file{f2c.h} so that @command{f2c} users
+may make full use of its features via the @command{g77}
version of @file{f2c.h} and the @code{INTEGER(KIND=2)}
-support routines in the @code{g77} version of @code{libf2c}.
+support routines in the @command{g77} version of @code{libf2c}.
@item
-Improve @code{g77} driver and @code{libf2c} so that @samp{g77 -v}
+Improve @command{g77} driver and @code{libf2c} so that @samp{g77 -v}
yields version information on the library.
@item
@samp{REAL(@var{expr})} and @samp{AIMAG(@var{expr})},
where @var{expr} is @code{DOUBLE COMPLEX} (or any
complex type other than @code{COMPLEX}), unless
-@samp{-ff90} option specifies Fortran 90 interpretation
-or new @samp{-fugly-complex} option, in conjunction with
-@samp{-fnot-f90}, specifies @code{f2c} interpretation.
+@option{-ff90} option specifies Fortran 90 interpretation
+or new @option{-fugly-complex} option, in conjunction with
+@option{-fnot-f90}, specifies @command{f2c} interpretation.
@ifclear USERVISONLY
@item
@code{COMMON} and @code{EQUIVALENCE} members at debug time.
@item
-New @samp{-fonetrip} option specifies FORTRAN-66-style
+New @option{-fonetrip} option specifies FORTRAN-66-style
one-trip @code{DO} loops.
@item
-New @samp{-fno-silent} option causes names of program units
+New @option{-fno-silent} option causes names of program units
to be printed as they are compiled, in a fashion similar to
-UNIX @code{f77} and @code{f2c}.
+UNIX @command{f77} and @command{f2c}.
@item
-New @samp{-fugly-assumed} option specifies that arrays
+New @option{-fugly-assumed} option specifies that arrays
dimensioned via @samp{DIMENSION X(1)}, for example, are to be
treated as assumed-size.
@item
-New @samp{-fno-typeless-boz} option specifies that non-decimal-radix
+New @option{-fno-typeless-boz} option specifies that non-decimal-radix
constants using the prefixed-radix form (such as @samp{Z'1234'})
are to be interpreted as @code{INTEGER} constants.
@item
-New @samp{-ff66} option is a ``shorthand'' option that specifies
+New @option{-ff66} option is a ``shorthand'' option that specifies
behaviors considered appropriate for FORTRAN 66 programs.
@item
-New @samp{-ff77} option is a ``shorthand'' option that specifies
-behaviors considered appropriate for UNIX @code{f77} programs.
+New @option{-ff77} option is a ``shorthand'' option that specifies
+behaviors considered appropriate for UNIX @command{f77} programs.
@item
-New @samp{-fugly-comma} and @samp{-fugly-logint} options provided
-to perform some of what @samp{-fugly} used to do.
-@samp{-fugly} and @samp{-fno-ugly} are now ``shorthand'' options,
+New @option{-fugly-comma} and @option{-fugly-logint} options provided
+to perform some of what @option{-fugly} used to do.
+@option{-fugly} and @option{-fno-ugly} are now ``shorthand'' options,
in that they do nothing more than enable (or disable) other
-@samp{-fugly-*} options.
+@option{-fugly-*} options.
@item
Fix parsing of assignment statements involving targets that
extending the area backwards.
@item
-Support @code{gcc} version 2.7.2.1.
+Support @command{gcc} version 2.7.2.1.
@item
Upgrade to @code{libf2c} as of 1996-09-26, and
matters) and to catch invalid @code{whence} arguments.
@item
-Some useless warnings from the @samp{-Wunused} option have
+Some useless warnings from the @option{-Wunused} option have
been eliminated.
@item
Fix a problem building the @file{f771} executable
-on AIX systems by linking with the @samp{-bbigtoc} option.
+on AIX systems by linking with the @option{-bbigtoc} option.
@item
-Abort configuration if @code{gcc} has not been patched
+Abort configuration if @command{gcc} has not been patched
using the patch file provided in the @file{gcc/f/gbe/}
subdirectory.
@item
-Add options @samp{--help} and @samp{--version} to the
-@code{g77} command, to conform to GNU coding guidelines.
-Also add printing of @code{g77} version number when
-the @samp{--verbose} (@samp{-v}) option is used.
+Add options @option{--help} and @option{--version} to the
+@command{g77} command, to conform to GNU coding guidelines.
+Also add printing of @command{g77} version number when
+the @option{--verbose} (@option{-v}) option is used.
@item
Change internally generated name for local @code{EQUIVALENCE}
Add some rudimentary support for @code{INTEGER*1},
@code{INTEGER*2}, @code{INTEGER*8},
and their @code{LOGICAL} equivalents.
-(This support works on most, maybe all, @code{gcc} targets.)
+(This support works on most, maybe all, @command{gcc} targets.)
Thanks to Scott Snyder (@email{snyder@@d0sgif.fnal.gov})
for providing the patch for this!
is only a subset of the general problem to be
addressed in 0.6).
-A new option, @samp{-fzeros}, is introduced to
+A new option, @option{-fzeros}, is introduced to
enable the traditional treatment of zeros as any
other value.
@item
-With @samp{-ff90} in force, @code{g77} incorrectly
+With @option{-ff90} in force, @command{g77} incorrectly
interpreted @samp{REAL(Z)} as returning a @code{REAL}
result, instead of as a @code{DOUBLE PRECISION}
result.
(Here, @samp{Z} is @code{DOUBLE COMPLEX}.)
-With @samp{-fno-f90} in force, the interpretation remains
+With @option{-fno-f90} in force, the interpretation remains
unchanged, since this appears to be how at least some
F77 code using the @code{DOUBLE COMPLEX} extension expected
it to work.
@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,
+implement optimizations in the @command{gcc} back end (GBE).
+These options are @option{-fmove-all-movables}, @option{-freduce-all-givs},
+and @option{-frerun-loop-opt}, which are enabled, by default,
for Fortran compilations.
These optimizations are intended to help toon Fortran programs.
kinds of references to array elements.
@item
-Due to patches to the GBE, the version number of @code{gcc}
+Due to patches to the GBE, the version number of @command{gcc}
also is patched to make it easier to manage installations,
-especially useful if it turns out a @code{g77} change to the
+especially useful if it turns out a @command{g77} change to the
GBE has a bug.
-The @code{g77}-modified version number is the @code{gcc}
+The @command{g77}-modified version number is the @command{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
+patch for that version of @command{gcc}, @samp{2} for the
second, and so on.
-So, this introduces version 2.7.2.f.1 of @code{gcc}.
+So, this introduces version 2.7.2.f.1 of @command{gcc}.
@item
Make several improvements and fixes to diagnostics, including
@item
Warning about two successive arithmetic operators, produced
-by @samp{-Wsurprising}, now produced @emph{only} when both
+by @option{-Wsurprising}, now produced @emph{only} when both
operators are, indeed, arithmetic (not relational/boolean).
@item
-@samp{-Wsurprising} now warns about the remaining cases
+@option{-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.
+loops, instead of these being rejected unless @option{-fpedantic}
+or @option{-fugly} specified.
@item
Allow @code{SAVE} of a local variable or array, even after
it has been given an initial value via @code{DATA}, for example.
@item
-Introduce an Info version of @code{g77} documentation, which
-supercedes @file{gcc/f/CREDITS}, @file{gcc/f/DOC}, and
+Introduce an Info version of @command{g77} documentation, which
+supersedes @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
David Ronis (@email{ronis@@onsager.chem.mcgill.ca}).
@item
-New @samp{-fno-second-underscore} option to specify
-that, when @samp{-funderscoring} is in effect, a second
+New @option{-fno-second-underscore} option to specify
+that, when @option{-funderscoring} is in effect, a second
underscore is not to be appended to Fortran names already
containing an underscore.
the default @code{INTEGER} type.
(This should have no effect on existing code compiled
-by @code{g77}, but code written to assume that use
+by @command{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 @code{INTEGER}) must be rewritten.)
@item
-Support @code{gcc} version 2.7.2.
+Support @command{gcc} version 2.7.2.
@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}
+Note that the email addresses related to @command{f2c}
have changed---the distribution site now is
named @code{netlib.bell-labs.com}, and the
maintainer's new address is @email{dmg@@bell-labs.com}.
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
+implications of the fact that when @samp{g77 -v} runs the @command{ld} command
+with @samp{-o /dev/null} that @command{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
Make @code{libf2c} build procedures work on more systems again by
-eliminating unnecessary invocations of @samp{ld -r -x} and @code{mv}.
+eliminating unnecessary invocations of @samp{ld -r -x} and @command{mv}.
@item
-Fix omission of @samp{-funix-intrinsics-@dots{}} options in list of permitted
+Fix omission of @option{-funix-intrinsics-@dots{}} options in list of permitted
options to compiler.
@item
constant for the right-hand operator (e.g. @samp{I**32767}).
@item
-Fix build procedures so cross-compiling @code{g77} (the @code{fini}
+Fix build procedures so cross-compiling @command{g77} (the @command{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
+Add new @option{-Wsurprising} option to warn about constructs that are
+interpreted by the Fortran standard (and @command{g77}) in ways that
are surprising to many programmers.
@item
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}).
+doesn't support these as intrinsics (e.g. @command{f2c}).
@item
-Remove from @samp{-fno-pedantic} the diagnostic about @code{DO}
+Remove from @option{-fno-pedantic} the diagnostic about @code{DO}
with non-@code{INTEGER} index variable; issue that under
-@samp{-Wsurprising} instead.
+@option{-Wsurprising} instead.
@item
Clarify some diagnostics that say things like ``ignored'' when that's
machines.
@item
-Support @code{gcc} version 2.7.1.
+Support @command{gcc} version 2.7.1.
@item
Upgrade to @code{libf2c} as of 1995-11-15.
@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).
+in @code{libf2c} from code compiled with @option{-fno-f2c} by making these
+procedures known to @command{g77} as intrinsics (not affected by -fno-f2c).
This is known to fix code invoking @code{ERF()}, @code{ERFC()},
@code{DERF()}, and @code{DERFC()}.
@item
Update @code{libf2c} to include netlib patches through 1995-08-16, and
-@code{#define} @code{WANT_LEAD_0} to 1 to make @code{g77}-compiled code more
+@code{#define} @code{WANT_LEAD_0} to 1 to make @command{g77}-compiled code more
consistent with other Fortran implementations by outputting
leading zeros in formatted and list-directed output.
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
+compared to @command{f2c} plus @command{gcc} (but apparently only when using
@file{gcc-2.7.0} or later).
@item
@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
+array, since the @command{gcc} back end does not support the necessary
+mechanics (and the @command{gcc} front end rejects the equivalent
construct, as it turns out).
@item
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.
+Fix installation bug that prevented installation of @command{g77} driver.
+Provide for easy selection of whether to install copy of @command{g77}
+as @command{f77} to replace the broken code.
@item
-Fix @code{gcc} driver (affects @code{g77} thereby) to not
+Fix @command{gcc} driver (affects @command{g77} thereby) to not
gratuitously invoke the
-@code{f771} program (e.g. when @samp{-E} is specified).
+@code{f771} program (e.g. when @option{-E} is specified).
@item
Fix diagnostic to point to correct source line when it immediately
follows an @code{INCLUDE} statement.
@item
-Support more compiler options in @code{gcc}/@code{g77} when
+Support more compiler options in @command{gcc}/@command{g77} when
compiling Fortran files.
-These options include @samp{-p}, @samp{-pg}, @samp{-aux-info}, @samp{-P},
+These options include @option{-p}, @option{-pg}, @option{-aux-info}, @option{-P},
correct setting of version-number macros for preprocessing, full
-recognition of @samp{-O0}, and
+recognition of @option{-O0}, and
automatic insertion of configuration-specific linker specs.
@item
@code{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).
+Improve @command{g77} so that @samp{g77 -v} by itself (or with
+certain other options, including @option{-B}, @option{-b}, @option{-i},
+@option{-nostdlib}, and @option{-V}) reports lots more useful
+version info, and so that long-form options @command{gcc} accepts are
+understood by @command{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.
+Add new @command{g77} option @option{--driver=name} to specify driver when
+default, @command{gcc}, isn't appropriate.
@item
Add support for @samp{#} directives (as output by the preprocessor) in the
info are more useful to users of the preprocessor.
@item
-Produce better diagnostics, more like @code{gcc}, with info such as
+Produce better diagnostics, more like @command{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.
+Support @command{gcc}'s @option{-fident} and @option{-fno-ident} options.
@item
-When @samp{-Wunused} in effect, don't warn about local variables used as
+When @option{-Wunused} in effect, don't warn about local variables used as
statement-function dummy arguments or @code{DATA} implied-@code{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
+cases (@command{g77} might someday start warning about these)---applies
+to @command{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
+New option @option{-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).
+@command{g77} using the native (non-@command{gcc}) compiler on certain machines
+(but definitely not all machines nor all non-@command{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
Add warning to be printed for each invocation of the compiler
if the target machine @code{INTEGER}, @code{REAL}, or @code{LOGICAL} size
is not 32 bits,
-since @code{g77} is known to not work well for such cases.
+since @command{g77} is known to not work well for such cases.
@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
+Build @code{libf2c} with @option{-g0}, not @option{-g2}, in effect
(by default), to produce
smaller library without lots of debugging clutter.
@end itemize
@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 @code{DO} loops).
+generated by @command{g77} and the back end (such as for @code{DO} loops).
@item
Fix crash given @samp{CHARACTER A;DATA A/.TRUE./}.
@item
Fix code generation for external functions returning type @code{REAL} when
-the @samp{-ff2c} option is in force (which it is by default) so that
-@code{f2c} compatibility is indeed provided.
+the @option{-ff2c} option is in force (which it is by default) so that
+@command{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
+New @option{-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.
+@option{-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
+as @command{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
values (e.g. via @code{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}).
+of @command{g77}).
Previously, in some @code{COMMON}/@code{EQUIVALENCE} areas
(essentially those with members of more than one type), the
uninitialized members were initialized to spaces, to
Fix various crashes involving code with diagnosed errors.
@item
-Support @samp{-I} option for @code{INCLUDE} statement, plus @code{gcc}'s
+Support @option{-I} option for @code{INCLUDE} statement, plus @command{gcc}'s
@file{header.gcc} facility for handling systems like MS-DOS.
@item
I/O list.
@item
-Remove all the @code{g77}-specific auto-configuration scripts, code,
+Remove all the @command{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).
+least somewhere other than @command{g77}, which expects a working ANSI C
+environment (and, for now, a GNU C compiler to compile @command{g77} itself).
@item
Complain if initialized common redeclared as larger in subsequent program
related warnings that might be helpful won't be seen.
@item
-New @samp{-fbackslash} option, on by default, that causes @samp{\}
+New @option{-fbackslash} option, on by default, that causes @samp{\}
within @code{CHARACTER}
and Hollerith constants to be interpreted a la GNU C.
Note that
-this behavior is somewhat different from @code{f2c}'s, which supports only
+this behavior is somewhat different from @command{f2c}'s, which supports only
a limited subset of backslash (escape) sequences.
@item
-Make @samp{-fugly-args} the default.
+Make @option{-fugly-args} the default.
@item
-New @samp{-fugly-init} option, on by default, that allows typeless/Hollerith
+New @option{-fugly-init} option, on by default, that allows typeless/Hollerith
to be specified as initial values for variables or named constants
(@code{PARAMETER}), and also allows character<->numeric conversion in
-those contexts---turn off via @samp{-fno-ugly-init}.
+those contexts---turn off via @option{-fno-ugly-init}.
@item
-New @samp{-finit-local-zero} option to initialize
+New @option{-finit-local-zero} option to initialize
local variables to binary zeros.
This does not affect whether they are @code{SAVE}d, i.e. made
automatic or static.
@item
-New @samp{-Wimplicit} option to warn about implicitly typed variables, arrays,
+New @option{-Wimplicit} option to warn about implicitly typed variables, arrays,
and functions.
(Basically causes all program units to default to @code{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.
+@option{-Wall} now implies @option{-Wuninitialized} as with @command{gcc}
+(i.e. unless @option{-O} not specified, since @option{-Wuninitialized}
+requires @option{-O}), and implies @option{-Wunused} as well.
@item
-@samp{-Wunused} no longer gives spurious messages for unused
+@option{-Wunused} no longer gives spurious messages for unused
@code{EXTERNAL} names (since they are assumed to refer to block data
program units, to make use of libraries more reliable).
Support null (zero-length) character constants and expressions.
@item
-Support @code{f2c}'s @code{IMAG()} generic intrinsic.
+Support @command{f2c}'s @code{IMAG()} generic intrinsic.
@item
Support @code{ICHAR()}, @code{IACHAR()}, and @code{LEN()} of
not normally as actual arguments.
@item
-Support @code{f2c}-style @samp{&} in column 1 to mean continuation line.
+Support @command{f2c}-style @samp{&} in column 1 to mean continuation line.
@item
Allow @code{NAMELIST}, @code{EXTERNAL}, @code{INTRINSIC}, and @code{VOLATILE}
type) instead of by value.
@end itemize
-@strong{Warning:} @code{f2c} differs on the
+@strong{Warning:} @command{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
+same as @samp{CALL FOO('X')}, but which the standard and @command{g77} treat
as @samp{CALL FOO(%REF('X '))} (padded with as many spaces as necessary
to widen to @code{INTEGER}), essentially.
Clean up diagnostic messages, shortening many of them.
@item
-Fix typo in @code{g77} man page.
+Fix typo in @command{g77} man page.
@item
Clarify implications of constant-handling bugs in @file{f/BUGS}.
@item
Generate better code for @code{SQRT()} and @code{DSQRT()},
-also when @samp{-ffast-math}
+also when @option{-ffast-math}
specified, enable better code generation for @code{SIN()} and @code{COS()}.
@item
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