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Fix pthread version check again

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Howard Chu 2002-09-18 00:11:53 +00:00
parent 043e5c5a13
commit 9c80832e08
1 changed files with 14 additions and 13 deletions
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@ -621,47 +621,48 @@ dnl
dnl ====================================================================
dnl Check POSIX Thread version
dnl
dnl defines ol_cv_pthread_version to 4, 5, 6, 7, 10, depending on the
dnl defines ol_cv_pthread_version to 4, 5, 6, 7, 8, 10, depending on the
dnl version of the POSIX.4a Draft that is implemented.
dnl 10 == POSIX.4a Final == POSIX.1c-1996 for our purposes.
dnl Existence of pthreads.h should be tested separately.
dnl Existence of pthread.h should be tested separately.
dnl
dnl tests:
dnl pthread_yield() was dropped in Draft 9, so
dnl only a Draft <= 8 library will define this
dnl pthread_detach() was dropped in Draft 8, it is present
dnl in every other version
dnl PTHREAD_CREATE_UNDETACHED is only in Draft 7, it was called
dnl PTHREAD_CREATE_JOINABLE after that
dnl pthread_attr_create was renamed to pthread_attr_init in Draft 6.
dnl Draft 6-10 has _init, Draft 4-5 has _create.
dnl pthread_attr_default was dropped in Draft 6, only 4 and 5 have it
dnl PTHREAD_MUTEX_INITIALIZER was introduced in Draft 5. It's not
dnl interesting to us because we don't try to statically
dnl initialize mutexes. 5-10 has it.
dnl pthread_attr_create was renamed to pthread_attr_init in Draft 6.
dnl Draft 6-10 has _init, Draft 4-5 has _create.
dnl
dnl Draft 9 and 10 are equivalent for our purposes.
dnl
AC_DEFUN([OL_POSIX_THREAD_VERSION],
[AC_CACHE_CHECK([POSIX thread version],[ol_cv_pthread_version],[
AC_EGREP_HEADER(pthread_yield,pthread.h,[
AC_EGREP_HEADER(pthread_detach,pthread.h,[
AC_TRY_COMPILE([
# include <pthread.h>
],[
int i = PTHREAD_CREATE_JOINABLE;
],[
AC_EGREP_HEADER(pthread_detach,pthread.h,
ol_cv_pthread_version=10, ol_cv_pthread_version=8)],[
AC_EGREP_CPP(draft7,[
# include <pthread.h>
# ifdef PTHREAD_CREATE_UNDETACHED
draft7
# endif
], ol_cv_pthread_version=7, [
AC_EGREP_HEADER(pthread_attr_default,pthread.h,[
AC_EGREP_HEADER(pthread_attr_init,pthread.h,
ol_cv_pthread_version=6, [
AC_EGREP_CPP(draft5,[
# include <pthread.h>
#ifdef PTHREAD_MUTEX_INITIALIZER
draft5
#endif
], ol_cv_pthread_version=5, ol_cv_pthread_version=4) ],
ol_cv_pthread_version=6) ]) ],
ol_cv_pthread_version=8) ],
ol_cv_pthread_version=10)
], ol_cv_pthread_version=5, ol_cv_pthread_version=4) ]) ]) ])
])
])dnl
dnl