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Fix pthreads version detection

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Howard Chu 2002-09-11 07:43:20 +00:00
parent dfa8bdec60
commit 97b98783c3
1 changed files with 16 additions and 21 deletions
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build/openldap.m4
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@ -629,48 +629,43 @@ dnl or that pthreads.h does exist. Existence of pthreads.h
dnl should be tested separately.
dnl
dnl tests:
dnl pthread_yield() was renamed to sched_yield() in Draft 10, so
dnl only a Draft 10 library will define this
dnl PTHREAD_INTR_ENABLE was introduced in Draft 6, and renamed to
dnl PTHREAD_CANCEL_ENABLE in Draft 7. Draft 7-10 has _CANCEL_,
dnl only Draft 6 has _INTR_
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_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 after Draft 4.
dnl Draft 6-10 has _init, Draft 4 has _create. (dunno about 5)
dnl
dnl Besides the use of sched_yield vs pthread_yield, differences from
dnl Draft 7 thru Draft 10 don't appear significant for our purposes.
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(sched_yield,pthread.h,
ol_cv_pthread_version=10, [
AC_EGREP_HEADER(pthread_yield,pthread.h,[
AC_EGREP_HEADER(pthread_detach,pthread.h,[
AC_EGREP_CPP(draft7,[
# include <pthread.h>
# ifdef PTHREAD_CANCEL_ENABLE
# ifdef PTHREAD_CREATE_JOINABLE
draft7
# endif
], ol_cv_pthread_version=7, [
AC_EGREP_CPP(draft6,[
# include <pthread.h>
#ifdef PTHREAD_INTR_ENABLE
draft6
#endif
], ol_cv_pthread_version=6, [
AC_EGREP_HEADER(pthread_attr_default,pthread.h,[
AC_EGREP_CPP(draft5,[
# include <pthread.h>
#ifdef PTHREAD_MUTEX_INITIALIZER
draft5
#endif
], ol_cv_pthread_version=5, [
AC_EGREP_HEADER(pthread_attr_create,pthread.h,
ol_cv_pthread_version=4, ol_cv_pthread_version=0) ]) ]) ]) ])
ol_cv_pthread_version=4, ol_cv_pthread_version=0) ]) ],
ol_cv_pthread_version=6) ]) ],
ol_cv_pthread_version=8) ],
ol_cv_pthread_version=10)
])
])dnl
dnl