From 0cb95cb5ae7e494f0ba776eeeceec3225ff15a28 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Diego=20=27Flameeyes=27=20Petten=C3=B2?=
 <flameeyes@gmail.com>
Date: Sat, 24 May 2008 02:04:27 +0200
Subject: Backport pthreads.m4 from 1.2.

Both attributes.m4 and pthread.m4 are two reusable M4 macro files,
which can eaily be shared between different projects. For this reason
it's better if they are kept identical between branches.
---
 m4/pthreads.m4 | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

(limited to 'm4')

diff --git a/m4/pthreads.m4 b/m4/pthreads.m4
index fb1adaab8..facac076f 100644
--- a/m4/pthreads.m4
+++ b/m4/pthreads.m4
@@ -73,3 +73,28 @@ AC_DEFUN([CC_PTHREAD_FLAGS], [
     ifelse([$2], , [:], [$2])
   fi
 ])
+
+AC_DEFUN([CC_PTHREAD_RECURSIVE_MUTEX], [
+    AC_REQUIRE([CC_PTHREAD_FLAGS])
+    AC_MSG_CHECKING([for recursive mutex support in pthread])
+
+    ac_save_LIBS="$LIBS"
+    LIBS="$LIBS $PTHREAD_LIBS"
+    AC_COMPILE_IFELSE(AC_LANG_SOURCE([#include <pthread.h>
+
+int main() {
+    pthread_mutexattr_t attr;
+    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+    return 0;
+}
+        ]), [have_recursive_mutex=yes], [have_recursive_mutex=no])
+    LIBS="$ac_save_LIBS"
+
+    AC_MSG_RESULT([$have_recursive_mutex])
+
+    if test x"$have_recursive_mutex" = x"yes"; then
+        ifelse([$1], , [:], [$1])
+    else
+        ifelse([$2], , [:], [$2])
+    fi
+])
-- 
cgit v1.2.3