GCC 11.1 Release Candidate available from gcc.gnu.org

[Jonathan Wakely]

On 21/04/21 10:56 +0200, Jakub Jelinek via Libstdc++ wrote:
>On Tue, Apr 20, 2021 at 10:12:33PM -0700, Thomas Rodgers wrote:
>> I think the attached patch (also in BZ) addresses the issue in
>> bits/semaphore_base.h, but I'm going to defer to Jonathan on why the macro
>> name is being transformed incorrectly in the first place.
>
>Jonathan's call, but for me it looks much better to fix up the
>macro name on the configure side.
>The include/Makefile.am sed is:
>        sed -e 's/HAVE_/_GLIBCXX_HAVE_/g' \
>            -e 's/PACKAGE/_GLIBCXX_PACKAGE/g' \
>            -e 's/VERSION/_GLIBCXX_VERSION/g' \
>            -e 's/WORDS_/_GLIBCXX_WORDS_/g' \
>            -e 's/_DARWIN_USE_64_BIT_INODE/_GLIBCXX_DARWIN_USE_64_BIT_INODE/g' \
>            -e 's/_FILE_OFFSET_BITS/_GLIBCXX_FILE_OFFSET_BITS/g' \
>            -e 's/_LARGE_FILES/_GLIBCXX_LARGE_FILES/g' \
>            -e 's/ICONV_CONST/_GLIBCXX_ICONV_CONST/g' \
>            -e '/[       ]_GLIBCXX_LONG_DOUBLE_COMPAT[   ]/d' \
>            -e '/[       ]_GLIBCXX_LONG_DOUBLE_ALT128_COMPAT[    ]/d' \
>            < ${CONFIG_HEADER} >> $@ ;\
>so for many macros one needs _GLIBCXX_ prefixes already in configure,
>as can be seen in grep AC_DEFINE.*_GLIBCXX configure.ac acinclude.m4
>But _GLIBCXX_HAVE_POSIX_SEMAPHORE is the only one that shouldn't have
>that prefix because the sed is adding that.
>E.g. on i686-linux, I see
>grep _GLIBCXX__GLIBCXX c++config.h
>#define _GLIBCXX__GLIBCXX_HAVE_POSIX_SEMAPHORE 1
>that proves it is the only broken one.
>
>So, I think the right fix is:
>
>2021-04-21  Jakub Jelinek  <jakub@redhat.com>
>
>	PR libstdc++/100164
>	* acinclude.m4: For POSIX semaphores AC_DEFINE HAVE_POSIX_SEMAPHORE
>	rather than _GLIBCXX_HAVE_POSIX_SEMAPHORE.
>	* configure: Regenerated.
>	* config.h.in: Regenerated.
>
>--- libstdc++-v3/acinclude.m4.jj	2020-12-16 14:42:46.501084530 +0100
>+++ libstdc++-v3/acinclude.m4	2021-04-21 10:51:52.450419650 +0200
>@@ -4097,7 +4097,7 @@ AC_DEFUN([GLIBCXX_CHECK_GTHREADS], [
>       [ac_have_posix_semaphore=no])
>
>   if test $ac_have_posix_semaphore = yes ; then
>-    AC_DEFINE(_GLIBCXX_HAVE_POSIX_SEMAPHORE,
>+    AC_DEFINE(HAVE_POSIX_SEMAPHORE,
> 	      1,
> 	      [Define to 1 if POSIX Semaphores with sem_timedwait are available in <semaphore.h>.])
>   fi

Yes, this is correct. Please push.