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Date: Sat, 23 May 1998 06:18:57 -0400 (EDT)
From: Craig Burley <burley@gnu.org>
To: info-gnu-fortran@gnu.org
Subject: GNU Fortran (g77) Version 0.5.23 Released
This release includes many changes since 0.5.22. A list is included
below.
The primary focus of this release is to upgrade to gcc 2.8, and to
fix some bugs in 0.5.22. 0.5.23 is *not* intended as a drop-in
replacement for 0.5.22 -- anyone installing this version should
definitely read the new installation instructions. For end users,
however, 0.5.23 should appear generally similar to 0.5.22, though
they should review the "Changes" node of the Info documentation
to see what changes might affect them.
See the .plan file for g77 <ftp://alpha.gnu.org/g77.plan; for
information on plans for future releases.
g77-0.5.22-0.5.23.diff.gz -- Patch file to apply to 0.5.22
g77-0.5.23.tar.gz -- Complete 0.5.23 distribution
NOTE: The patch file does not include patches to the Info documentation,
which is derived from the texinfo sources in the distribution (and
updated via the patch). This is to reduce the size of the patch file.
If you don't have makeinfo version 1.68 (or more recent) installed
(distributed as texinfo-3.11.tar.gz), obtain and use the full distribution
instead. However, it is definitely worthwhile having texinfo installed
and making full use of GNU Info documentation! Similar, the patch
file does not include patches to autoconf-produced files, so users
of the patch file will need to have autoconf installed.
Please report any bugs or questions to <fortran@gnu.org>,
after first reviewing the documentation and the .plan file.
(GNU Fortran is a free replacement for the UNIX f77 Fortran compiler,
and is currently in beta testing. To build it requires the GNU CC
source distribution, Version 2.8.1, which you can obtain as
gcc-2.8.1.tar.gz from a GNU distribution site.)
tq vm, (burley)
* This release contains several regressions against version 0.5.22
of `g77', due to using the "vanilla" `gcc' back end instead of
patching it to fix a few bugs and improve performance in a few
cases.
*Note Actual Bugs We Haven't Fixed Yet: Actual Bugs, available in
plain-text format in `gcc/f/BUGS', for information on the known
bugs in this version, including the regressions.
Features that have been dropped from this version of `g77' due to
their being implemented via `g77'-specific patches to the `gcc'
back end in previous releases include:
- Support for `__restrict__' keyword, the options
`-fargument-alias', `-fargument-noalias', and
`-fargument-noalias-global', and the corresponding
alias-analysis code.
(Version 1.0.1 of `egcs' has the alias-analysis code, but not
the `__restrict__' keyword. `egcs' `g77' users benefit from
the alias-analysis code despite the lack of the
`__restrict__' keyword, which is a C-language construct.)
- Support for the GNU compiler options `-fmove-all-movables',
`-freduce-all-givs', and `-frerun-loop-opt'.
(Version 1.0.1 of `egcs' supports these options. `g77' users
of `egcs' benefit from them even if they are not explicitly
specified, because the defaults are optimized for `g77'
users.)
- Support for the `-W' option warning about integer division by
zero.
- The Intel x86-specific option `-malign-double' applying to
stack-allocated data as well as statically-allocate data.
Note that the `gcc/f/gbe/' subdirectory has been removed from this
distribution as a result of `g77' no longer including patches for
the `gcc' back end.
* Fix bugs in the `libU77' intrinsic `HostNm' that wrote one byte
beyond the end of its `CHARACTER' argument, and in the `libU77'
intrinsics `GMTime' and `LTime' that overwrote their arguments.
* Support `gcc' version 2.8, and remove support for prior versions
of `gcc'.
* Remove support for the `--driver' option, as `g77' now does all
the driving, just like `gcc'.
* `CASE DEFAULT' no longer crashes `g77'.
* Valid combinations of `EXTERNAL', passing that external as a dummy
argument without explicitly giving it a type, and, in a subsequent
program unit, referencing that external as an external function
with a different type no longer crash `g77'.
* `g77' no longer installs the `f77' command and `f77.1' man page in
the `/usr' or `/usr/local' heirarchy, even if the `f77-install-ok'
file exists in the source or build directory. See the
installation documentation for more information.
* `g77' no longer installs the `libf2c.a' library and `f2c.h'
include file in the `/usr' or `/usr/local' heirarchy, even if the
`f2c-install-ok' or `f2c-exists-ok' files exist in the source or
build directory. See the installation documentation for more
information.
* The `libf2c.a' library produced by `g77' has been renamed to
`libg2c.a'. It is installed only in the `gcc' "private" directory
heirarchy, `gcc-lib'. This allows system administrators and users
to choose which version of the `libf2c' library from `netlib' they
wish to use on a case-by-case basis. See the installation
documentation for more information.
* The `f2c.h' include (header) file produced by `g77' has been
renamed to `g2c.h'. It is installed only in the `gcc' "private"
directory heirarchy, `gcc-lib'. This allows system administrators
and users to choose which version of the include file from
`netlib' they wish to use on a case-by-case basis. See the
installation documentation for more information.
* The `g77' command now expects the run-time library to be named
`libg2c.a' instead of `libf2c.a', to ensure that a version other
than the one built and installed as part of the same `g77' version
is picked up.
* The `-Wunused' option no longer issues a spurious warning about
the "master" procedure generated by `g77' for procedures
containing `ENTRY' statements.
* `g77''s version of `libf2c' separates out the setting of global
state (such as command-line arguments and signal handling) from
`main.o' into distinct, new library archive members.
This should make it easier to write portable applications that
have their own (non-Fortran) `main()' routine properly set up the
`libf2c' environment, even when `libf2c' (now `libg2c') is a
shared library.
* During the configuration and build process, `g77' creates
subdirectories it needs only as it needs them, thus avoiding
unnecessary creation of, for example, `stage1/f/runtime' when
doing a non-bootstrap build. Other cleaning up of the
configuration and build process has been performed as well.
* `install-info' now used to update the directory of Info
documentation to contain an entry for `g77' (during installation).
* Some diagnostics have been changed from warnings to errors, to
prevent inadvertent use of the resulting, probably buggy, programs.
These mostly include diagnostics about use of unsupported features
in the `OPEN', `INQUIRE', `READ', and `WRITE' statements, and
about truncations of various sorts of constants.
* Improve documentation and indexing.
* Upgrade to `libf2c' as of 1998-04-20.
This should fix a variety of problems, including those involving
some uses of the `T' format specifier, and perhaps some build
(porting) problems as well.
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