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# We define, separately, PTHREAD_CFLAGS, _LDFLAGS and _LIBS
# even though currently we don't set them very separately.
# This means that the makefiles will not need to change in
# the future if we make the test more sophisticated.
AC_DEFUN([AX_PTHREAD_CV2VARS],[
PTHREAD_CFLAGS="$ax_cv_pthread_flags"
PTHREAD_LDFLAGS="$ax_cv_pthread_flags"
PTHREAD_LIBS=""
])
# We invoke AX_PTHREAD_VARS with the name of another macro
# which is then expanded once for each variable.
AC_DEFUN([AX_PTHREAD_VARS],[$1(CFLAGS) $1(LDFLAGS) $1(LIBS)])
AC_DEFUN([AX_PTHREAD_VAR_APPLY],[
$1="$$1 $PTHREAD_$1"
])
AC_DEFUN([AX_PTHREAD_VAR_SUBST],[AC_SUBST(PTHREAD_$1)])
AC_DEFUN([AX_CHECK_PTHREAD],[
AC_CACHE_CHECK([for pthread flag], [ax_cv_pthread_flags], [
ax_cv_pthread_flags=-pthread
AX_PTHREAD_CV2VARS
AX_PTHREAD_VARS([AX_SAVEVAR_SAVE])
AX_PTHREAD_VARS([AX_PTHREAD_VAR_APPLY])
AC_LINK_IFELSE([AC_LANG_SOURCE([
#include <pthread.h>
int main(void) {
pthread_atfork(0,0,0);
pthread_create(0,0,0,0);
}
])],[],[ax_cv_pthread_flags=failed])
AX_PTHREAD_VARS([AX_SAVEVAR_RESTORE])
])
if test "x$ax_cv_pthread_flags" = xfailed; then
AC_MSG_ERROR([-pthread does not work])
fi
AX_PTHREAD_CV2VARS
AX_PTHREAD_VARS([AX_PTHREAD_VAR_SUBST])
])
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