Bug#367657: marked as done ([PR28322] GCC new warnings and compatibility)
Your message dated Tue, 26 Feb 2008 15:32:12 +0000
with message-id <E1JU1mu-0003V6-9r@ries.debian.org>
and subject line Bug#367657: fixed in gcc-4.2 4.2.3-2
has caused the Debian Bug report #367657,
regarding [PR28322] GCC new warnings and compatibility
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
(NB: If you are a system administrator and have no idea what this
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--
367657: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=367657
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message ---
Package: gcc
Version: 4:4.0.2-2
Summary:
GCC should be more tolerant of
gcc -Wno-this-is-not-a-recognised-warning
as specified in detail below.
Discussion:
Occasionally, GCC introduces new warnings. For example, GCC 4 has
introduced warnings about discrepancies in signedness of integers
pointed to by otherwise-compatible pointers.
Furthermore, because GCC has traditionally had such good warnings, and
such good configurability of warnings, and because no-one looks at
warnings that don't cause build failures, many people (myself
included) use -Werror in nearly all of their projects.
However, when new warnings are introduced, there is a problem with the
configurability: Like any warning, whether or not you want it enabled
depends on your coding style and practices and on other rather
subjective details. This means that there can be no universally
correct default for a new warning; turning it on by default is
sometimes a reasonable value judgement on the part of the compiler
authors.
When a new warning is introduced and enabled by default, then the
author of a project whose coding style warrants disabling that warning
is faced with a difficult choice:
* they can set the build system to say -Wno-new-warning (for whatever
value of `new-warning' is relevant) so that it builds on new
compilers but so that users of older GCC's need to override the
build system to remove -Wno-new-warning (which the older GCC
doesn't understand);
* they can turn off -Werror, leaving themselves open to the massive
bugs which are often hidden by warnings which are ignored (perhaps
bugs which don't show up and aren't warned about on the developer's
system, because of the various type differences between systems);
* they can leave things as they are and require users of the new
compiler to override the build system.
* they can add complexity to the build system to try to autodetect
the available compiler options; this usually works but it makes the
build system more complex - note that in some projects this might
be the only reason why something like autoconf might be required.
None of these are the right answer.
I would like to propose a straightforward answer which can easily be
implemented in GCC and leaves everything correct. With this change,
it is much easier to make portable packages which still make good and
strict use of GCC's excellent warnings system.
Specification of the proposed new behaviour:
1. GCC should ignore unknown -Wno-* options if no other warnings are to
be issued. This is always correct since the only effect of such an
option would be to suppress warnings which might otherwise be
issued. If no warnings are to be issued at all then treating even
an unknown suppression as a no-op is clearly correct.
2. If some other warnings are to be issued, then it is necessary to
report on stderr if any unknown (and therefore unheeded)
suppressions were in force, in case the user intended for one of
the relevant suppressions to apply to the warning(s) in question.
This will alert the user to the lack of support for that
suppression in this gcc (ie, either to the user's typo or the wrong
gcc version). The combination of (1) and (2) will minimise stderr
noise about unknown suppressions as far as I think is reasonably
possible.
3. Obviously unknown suppressions ignored according to (1) should not
count as errors for -Werror. Whether unknown suppressions reported
according to (2) should count as as errors for -Werror is not
important because the actual warning will count as an error for
-Werror. So the diagnostic from (2) above can be a real `warning',
or simply an appropriate message issued to stderr the first time a
warning is to be issued despite the presence of unknown -Wno-*
options.
4. Whenever a new GCC warning is introduced, or the scope of an
existing warning significantly extended, a corresponding -Wno-*
option should be introduced at the same time. (AFAIAA current GCC
development practice seems to abide by this principle.)
5. The changes to implement (1) and (2) should be backported to
earlier GCCs and earlier Debian branches insofar as practical.
Ian.
--- End Message ---
--- Begin Message ---
Source: gcc-4.2
Source-Version: 4.2.3-2
We believe that the bug you reported is fixed in the latest version of
gcc-4.2, which is due to be installed in the Debian FTP archive:
cpp-4.2_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/cpp-4.2_4.2.3-2_i386.deb
cpp-4.2_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/cpp-4.2_4.2.3-2_powerpc.deb
g++-4.2-multilib_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/g++-4.2-multilib_4.2.3-2_i386.deb
g++-4.2-multilib_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/g++-4.2-multilib_4.2.3-2_powerpc.deb
g++-4.2_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/g++-4.2_4.2.3-2_i386.deb
g++-4.2_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/g++-4.2_4.2.3-2_powerpc.deb
gcc-4.2-base_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/gcc-4.2-base_4.2.3-2_i386.deb
gcc-4.2-base_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/gcc-4.2-base_4.2.3-2_powerpc.deb
gcc-4.2-locales_4.2.3-2_all.deb
to pool/main/g/gcc-4.2/gcc-4.2-locales_4.2.3-2_all.deb
gcc-4.2-multilib_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/gcc-4.2-multilib_4.2.3-2_i386.deb
gcc-4.2-multilib_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/gcc-4.2-multilib_4.2.3-2_powerpc.deb
gcc-4.2-source_4.2.3-2_all.deb
to pool/main/g/gcc-4.2/gcc-4.2-source_4.2.3-2_all.deb
gcc-4.2_4.2.3-2.diff.gz
to pool/main/g/gcc-4.2/gcc-4.2_4.2.3-2.diff.gz
gcc-4.2_4.2.3-2.dsc
to pool/main/g/gcc-4.2/gcc-4.2_4.2.3-2.dsc
gcc-4.2_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/gcc-4.2_4.2.3-2_i386.deb
gcc-4.2_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/gcc-4.2_4.2.3-2_powerpc.deb
gfortran-4.2-multilib_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/gfortran-4.2-multilib_4.2.3-2_i386.deb
gfortran-4.2-multilib_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/gfortran-4.2-multilib_4.2.3-2_powerpc.deb
gfortran-4.2_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/gfortran-4.2_4.2.3-2_i386.deb
gfortran-4.2_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/gfortran-4.2_4.2.3-2_powerpc.deb
gobjc++-4.2-multilib_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/gobjc++-4.2-multilib_4.2.3-2_i386.deb
gobjc++-4.2-multilib_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/gobjc++-4.2-multilib_4.2.3-2_powerpc.deb
gobjc++-4.2_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/gobjc++-4.2_4.2.3-2_i386.deb
gobjc++-4.2_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/gobjc++-4.2_4.2.3-2_powerpc.deb
gobjc-4.2-multilib_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/gobjc-4.2-multilib_4.2.3-2_i386.deb
gobjc-4.2-multilib_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/gobjc-4.2-multilib_4.2.3-2_powerpc.deb
gobjc-4.2_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/gobjc-4.2_4.2.3-2_i386.deb
gobjc-4.2_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/gobjc-4.2_4.2.3-2_powerpc.deb
lib64gfortran2-dbg_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/lib64gfortran2-dbg_4.2.3-2_i386.deb
lib64gfortran2-dbg_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/lib64gfortran2-dbg_4.2.3-2_powerpc.deb
lib64gfortran2_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/lib64gfortran2_4.2.3-2_i386.deb
lib64gfortran2_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/lib64gfortran2_4.2.3-2_powerpc.deb
lib64stdc++6-4.2-dbg_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/lib64stdc++6-4.2-dbg_4.2.3-2_i386.deb
lib64stdc++6-4.2-dbg_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/lib64stdc++6-4.2-dbg_4.2.3-2_powerpc.deb
libgfortran2-dbg_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/libgfortran2-dbg_4.2.3-2_i386.deb
libgfortran2-dbg_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/libgfortran2-dbg_4.2.3-2_powerpc.deb
libgfortran2_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/libgfortran2_4.2.3-2_i386.deb
libgfortran2_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/libgfortran2_4.2.3-2_powerpc.deb
libstdc++6-4.2-dbg_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/libstdc++6-4.2-dbg_4.2.3-2_i386.deb
libstdc++6-4.2-dbg_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/libstdc++6-4.2-dbg_4.2.3-2_powerpc.deb
libstdc++6-4.2-dev_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/libstdc++6-4.2-dev_4.2.3-2_i386.deb
libstdc++6-4.2-dev_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/libstdc++6-4.2-dev_4.2.3-2_powerpc.deb
libstdc++6-4.2-doc_4.2.3-2_all.deb
to pool/main/g/gcc-4.2/libstdc++6-4.2-doc_4.2.3-2_all.deb
libstdc++6-4.2-pic_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/libstdc++6-4.2-pic_4.2.3-2_i386.deb
libstdc++6-4.2-pic_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/libstdc++6-4.2-pic_4.2.3-2_powerpc.deb
treelang-4.2_4.2.3-2_i386.deb
to pool/main/g/gcc-4.2/treelang-4.2_4.2.3-2_i386.deb
treelang-4.2_4.2.3-2_powerpc.deb
to pool/main/g/gcc-4.2/treelang-4.2_4.2.3-2_powerpc.deb
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to 367657@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Matthias Klose <doko@debian.org> (supplier of updated gcc-4.2 package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@debian.org)
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Format: 1.7
Date: Tue, 26 Feb 2008 01:59:27 +0100
Source: gcc-4.2
Binary: gcc-4.2-base gcc-4.2 gcc-4.2-multilib gcc-4.2-hppa64 cpp-4.2 gcc-4.2-locales g++-4.2 g++-4.2-multilib gobjc++-4.2 gobjc++-4.2-multilib gobjc-4.2 gobjc-4.2-multilib gfortran-4.2 gfortran-4.2-multilib libgfortran2 libgfortran2-dbg lib64gfortran2 lib64gfortran2-dbg lib32gfortran2 lib32gfortran2-dbg libstdc++6-4.2-dev libstdc++6-4.2-pic libstdc++6-4.2-dbg lib32stdc++6-4.2-dbg lib64stdc++6-4.2-dbg libstdc++6-4.2-doc treelang-4.2 gcc-4.2-soft-float gcc-4.2-source
Architecture: all i386 powerpc source
Version: 4.2.3-2
Distribution: unstable
Urgency: low
Maintainer: Debian GCC Maintainers <debian-gcc@lists.debian.org>
Changed-By: Matthias Klose <doko@debian.org>
Description:
cpp-4.2 - The GNU C preprocessor
g++-4.2 - The GNU C++ compiler
g++-4.2-multilib - The GNU C++ compiler (multilib files)
gcc-4.2 - The GNU C compiler
gcc-4.2-base - The GNU Compiler Collection (base package)
gcc-4.2-locales - The GNU C compiler (native language support files)
gcc-4.2-multilib - The GNU C compiler (multilib files)
gcc-4.2-source - Source of the GNU Compiler Collection
gfortran-4.2 - The GNU Fortran 95 compiler
gfortran-4.2-multilib - The GNU Fortran 95 compiler (multilib files)
gobjc++-4.2 - The GNU Objective-C++ compiler
gobjc++-4.2-multilib - The GNU Objective-C++ compiler (multilib files)
gobjc-4.2 - The GNU Objective-C compiler
gobjc-4.2-multilib - The GNU Objective-C compiler (multilib files)
lib64gfortran2 - Runtime library for GNU Fortran applications (64bit)
lib64gfortran2-dbg - Runtime library for GNU Fortran applications (64bit debug symbols
lib64stdc++6-4.2-dbg - The GNU Standard C++ Library v3 (debugging files)
libgfortran2 - Runtime library for GNU Fortran applications
libgfortran2-dbg - Runtime library for GNU Fortran applications (debug symbols)
libstdc++6-4.2-dbg - The GNU Standard C++ Library v3 (debugging files)
libstdc++6-4.2-dev - The GNU Standard C++ Library v3 (development files)
libstdc++6-4.2-doc - The GNU Standard C++ Library v3 (documentation files)
libstdc++6-4.2-pic - The GNU Standard C++ Library v3 (shared library subset kit)
treelang-4.2 - The GNU Treelang compiler
Closes: 367657 427677 442036 464365
Changes:
gcc-4.2 (4.2.3-2) unstable; urgency=low
.
[Matthias Klose]
* Update to SVN 20080225 from the ubuntu/gcc-4_2-branch.
- gcj: Install rmic template files. Closes: #427677.
- Fix PR rtl-optimization/33410, ICE in iv_analyze_expr.
Closes: #442036.
- debian/patches/pr31868.dpatch: Remove, applied upstream.
* Require 4.2.3-1 as a minimum dependency for the binary packages.
* libgcj8-dev: Don't claim that the package contains the static
libraries. LP: #163231.
* libjava-xulrunner1.9.dpatch: Add configure check for xulrunner-1.9,
configure with xulrunner-1.9-dev if available (Alexander Sack).
* libgcj-doc: Don't include the examples; these cannot be built
with the existing Makefile anyway. Addresses: #449608.
* Manpages for gc-analyze and grmic are GFDL. Don't include these when
building DFSG compliant packages.
* Fix build failure building amd64 cross-target libstdc++ packages
(Tim Bagot). Closes: #464365.
* Fix typos in rename-info-files patch.
* Fix PR libgcj/24170.
* Apply proposed patch to fix root cause for PR middle-end/32889.
* Fix PR other/28322, GCC new warnings and compatibility.
Closes: #367657.
.
[Arthur Loiret]
* gdc updates:
- Use a new lzma-compressed tarball.
- debian/rules.patch: Disable svn-gdc-updates.dpatch.
- gdc-4.2-build.dpatch: Update, support gcc-4.3 as well.
- gdc-4.2.dpatch: Update, re-enable builtin assert support.
- gdc-driver-defaultlib.dpatch: Update.
- gdc-fix-build.dpatch: Fix FTBFS on powerpc.
.
[Aurelien Jarno]
* kbsd-gnu-ada.dpatch: update from upstream to enable ZCX on
GNU/kFreeBSD.
Files:
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