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| author | Jonathan Wakely <jwakely@redhat.com> | 2020-11-23 17:17:09 +0000 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2020-11-23 18:12:39 +0000 |
| commit | 92b47a321e14f98c524f6e67e7ecabad5afa7886 (patch) | |
| tree | 10cdaf5fed7b640620d001b92c0ed8aef9195a29 /libstdc++-v3/config.h.in | |
| parent | 183ae52b226898cc34aa51d4153cf0c006212a8a (diff) | |
| download | gcc-92b47a321e14f98c524f6e67e7ecabad5afa7886.zip gcc-92b47a321e14f98c524f6e67e7ecabad5afa7886.tar.gz gcc-92b47a321e14f98c524f6e67e7ecabad5afa7886.tar.bz2 | |
libstdc++: Add configure checks for semaphores
This moves the checks for POSIX semaphores to configure time. As well as
requiring <semaphore.h> and SEM_VALUE_MAX, we also require the
sem_timedwait function. That was only optional in POSIX 2001 (and is
absent on Darwin).
libstdc++-v3/ChangeLog:
* acinclude.m4 (GLIBCXX_CHECK_GTHREADS): Check for
* config.h.in: Regenerate.
* configure: Regenerate.
* include/bits/semaphore_base.h (_GLIBCXX_HAVE_POSIX_SEMAPHORE):
Check autoconf macro instead of defining it here.
Diffstat (limited to 'libstdc++-v3/config.h.in')
| -rw-r--r-- | libstdc++-v3/config.h.in | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libstdc++-v3/config.h.in b/libstdc++-v3/config.h.in index 8ae3e0f..72faabf 100644 --- a/libstdc++-v3/config.h.in +++ b/libstdc++-v3/config.h.in @@ -872,6 +872,10 @@ /* Define if gthreads library is available. */ #undef _GLIBCXX_HAS_GTHREADS +/* Define to 1 if POSIX Semaphores with sem_timedwait are available in + <semaphore.h>. */ +#undef _GLIBCXX_HAVE_POSIX_SEMAPHORE + /* Define to 1 if a full hosted library is built, or 0 if freestanding. */ #undef _GLIBCXX_HOSTED |