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* [Bug c/59749] New: unused warning not emited for unused static struct unles -save-temps is used @ 2014-01-10 9:19 martin at netbsd dot org 2014-01-10 9:20 ` [Bug c/59749] " martin at netbsd dot org ` (5 more replies) 0 siblings, 6 replies; 7+ messages in thread From: martin at netbsd dot org @ 2014-01-10 9:19 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59749 Bug ID: 59749 Summary: unused warning not emited for unused static struct unles -save-temps is used Product: gcc Version: 4.8.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: martin at netbsd dot org Created attachment 31793 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31793&action=edit original source file exhibiting the problem I have a program (for the atf testing framework) that is supposed to warn about an unused variable and (due to -Werror) fail compilation. This works fine with gcc 4.5.4. But with 4.8.2 I get: $ /usr/pkg/gcc48/bin/cc -O2 -c -Wall -Werror /usr/tests/atf/atf-c/unused_test.c $ The code (after macro expansion) declares a struct and initialize it: static atfu_this_is_unused_tc_pack = { .m_ident = .... }; and there is no reference to this struct anywhere in the file. Interestingly when preparing for this ticket I did: $ /usr/pkg/gcc48/bin/cc -O2 -save-temps -c -Wall -Werror /usr/tests/atf/atf-c/unused_test.c /usr/tests/atf/atf-c/unused_test.c:41:123: error: 'atfu_this_is_unused_tc' defined but not used [-Werror=unused-variable] ATF_TC(this_is_unused); ^ cc1: all warnings being treated as errors $ /usr/pkg/gcc48/bin/cc -v Using built-in specs. COLLECT_GCC=/usr/pkg/gcc48/bin/cc COLLECT_LTO_WRAPPER=/usr/pkg/gcc48/libexec/gcc/sparc64--netbsd/4.8.2/lto-wrapper Target: sparc64--netbsd Configured with: ../gcc-4.8.2/configure --enable-languages='c c++' --enable-shared --enable-long-long --with-local-prefix=/usr/pkg/gcc48 --enable-libssp --enable-threads=posix --with-boot-ldflags='-static-libstdc++ -static-libgcc -Wl,-R/usr/pkg/lib ' --with-gnu-ld --with-ld=/usr/bin/ld --with-gnu-as --with-as=/usr/bin/as --disable-nls --with-gmp=/usr/pkg --with-mpc=/usr/pkg --with-mpfr=/usr/pkg --enable-__cxa_atexit --with-gxx-include-dir=/usr/pkg/gcc48/include/c++/ --prefix=/usr/pkg/gcc48 --build=sparc64--netbsd --host=sparc64--netbsd --infodir=/usr/pkg/gcc48/info --mandir=/usr/pkg/gcc48/man Thread model: posix gcc version 4.8.2 (GCC) ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c/59749] unused warning not emited for unused static struct unles -save-temps is used 2014-01-10 9:19 [Bug c/59749] New: unused warning not emited for unused static struct unles -save-temps is used martin at netbsd dot org @ 2014-01-10 9:20 ` martin at netbsd dot org 2014-01-14 11:34 ` martin at netbsd dot org ` (4 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: martin at netbsd dot org @ 2014-01-10 9:20 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59749 --- Comment #1 from Martin Husemann <martin at netbsd dot org> --- Created attachment 31794 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31794&action=edit unused_test.i file from -save-temps ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c/59749] unused warning not emited for unused static struct unles -save-temps is used 2014-01-10 9:19 [Bug c/59749] New: unused warning not emited for unused static struct unles -save-temps is used martin at netbsd dot org 2014-01-10 9:20 ` [Bug c/59749] " martin at netbsd dot org @ 2014-01-14 11:34 ` martin at netbsd dot org 2014-03-19 13:46 ` mpolacek at gcc dot gnu.org ` (3 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: martin at netbsd dot org @ 2014-01-14 11:34 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59749 --- Comment #2 from Martin Husemann <martin at netbsd dot org> --- Unfortunately I can not reproduce the issue with the .i file generated with -save-temps (but still with the original .c file). ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c/59749] unused warning not emited for unused static struct unles -save-temps is used 2014-01-10 9:19 [Bug c/59749] New: unused warning not emited for unused static struct unles -save-temps is used martin at netbsd dot org 2014-01-10 9:20 ` [Bug c/59749] " martin at netbsd dot org 2014-01-14 11:34 ` martin at netbsd dot org @ 2014-03-19 13:46 ` mpolacek at gcc dot gnu.org 2014-03-19 15:01 ` martin at netbsd dot org ` (2 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: mpolacek at gcc dot gnu.org @ 2014-03-19 13:46 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59749 Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mpolacek at gcc dot gnu.org --- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> --- If the warning is present with .i but not with .c, then we can't do much about it without the .c file with its headers. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c/59749] unused warning not emited for unused static struct unles -save-temps is used 2014-01-10 9:19 [Bug c/59749] New: unused warning not emited for unused static struct unles -save-temps is used martin at netbsd dot org ` (2 preceding siblings ...) 2014-03-19 13:46 ` mpolacek at gcc dot gnu.org @ 2014-03-19 15:01 ` martin at netbsd dot org 2014-03-24 10:47 ` mpolacek at gcc dot gnu.org 2014-03-26 7:40 ` mpolacek at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: martin at netbsd dot org @ 2014-03-19 15:01 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59749 --- Comment #4 from Martin Husemann <martin at netbsd dot org> --- Yes - I'm still trying to reduce it to a reasonable test case, but in general it works - so I am confused big time. Also Julio (the ATF author) claims the same test works on FreeBSD with a very similar compiler version. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c/59749] unused warning not emited for unused static struct unles -save-temps is used 2014-01-10 9:19 [Bug c/59749] New: unused warning not emited for unused static struct unles -save-temps is used martin at netbsd dot org ` (3 preceding siblings ...) 2014-03-19 15:01 ` martin at netbsd dot org @ 2014-03-24 10:47 ` mpolacek at gcc dot gnu.org 2014-03-26 7:40 ` mpolacek at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: mpolacek at gcc dot gnu.org @ 2014-03-24 10:47 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59749 Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |WAITING Last reconfirmed| |2014-03-24 Ever confirmed|0 |1 --- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Waiting for a test case. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug c/59749] unused warning not emited for unused static struct unles -save-temps is used 2014-01-10 9:19 [Bug c/59749] New: unused warning not emited for unused static struct unles -save-temps is used martin at netbsd dot org ` (4 preceding siblings ...) 2014-03-24 10:47 ` mpolacek at gcc dot gnu.org @ 2014-03-26 7:40 ` mpolacek at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: mpolacek at gcc dot gnu.org @ 2014-03-26 7:40 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59749 Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|WAITING |RESOLVED Resolution|--- |DUPLICATE --- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Actually I think this is a dup. *** This bug has been marked as a duplicate of bug 57201 *** ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2014-03-26 7:40 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2014-01-10 9:19 [Bug c/59749] New: unused warning not emited for unused static struct unles -save-temps is used martin at netbsd dot org 2014-01-10 9:20 ` [Bug c/59749] " martin at netbsd dot org 2014-01-14 11:34 ` martin at netbsd dot org 2014-03-19 13:46 ` mpolacek at gcc dot gnu.org 2014-03-19 15:01 ` martin at netbsd dot org 2014-03-24 10:47 ` mpolacek at gcc dot gnu.org 2014-03-26 7:40 ` mpolacek at gcc dot gnu.org
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