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Test if need braces around PTHREAD_ONCE_INIT, set

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AC_OUTPUT of SCM_I_GSC_NEED_BRACES_ON_PTHREAD_ONCE_INIT.
This commit is contained in:
Kevin Ryde 2006-08-21 23:26:32 +00:00
parent 82843d5c26
commit 33f9e79b8c
1 changed files with 26 additions and 2 deletions
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28
configure.in
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@ -1021,13 +1021,37 @@ case "$with_threads" in
with_threads="pthreads",
with_threads="null")
old_CFLAGS="$CFLAGS"
CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
# Reasons for testing:
# pthread_getattr_np - "np" meaning "non portable" says it
# all; not present on MacOS X or Solaris 10
#
old_CFLAGS="$CFLAGS"
CFLAGS="$PTHREAD_CFLAGS $CFLAGS"
AC_CHECK_FUNCS(pthread_attr_getstack pthread_getattr_np)
# On past versions of Solaris, believe 8 through 10 at least, you
# had to write "pthread_once_t foo = { PTHREAD_ONCE_INIT };".
# This is contrary to posix:
# http://www.opengroup.org/onlinepubs/000095399/functions/pthread_once.html
# Check here if this style is required.
#
# glibc (2.3.6 at least) works both with or without braces, so the
# test checks whether it works without.
#
AC_CACHE_CHECK([whether PTHREAD_ONCE_INIT needs braces],
guile_cv_need_braces_on_pthread_once_init,
[AC_TRY_COMPILE([#include <pthread.h>],
[pthread_once_t foo = PTHREAD_ONCE_INIT;],
[guile_cv_need_braces_on_pthread_once_init=no],
[guile_cv_need_braces_on_pthread_once_init=yes])])
if test "$guile_cv_need_braces_on_pthread_once_init" = yes; then
SCM_I_GSC_NEED_BRACES_ON_PTHREAD_ONCE_INIT=1
else
SCM_I_GSC_NEED_BRACES_ON_PTHREAD_ONCE_INIT=0
fi
AC_SUBST(SCM_I_GSC_NEED_BRACES_ON_PTHREAD_ONCE_INIT)
CFLAGS="$old_CFLAGS"
# On Solaris, sched_yield lives in -lrt.