From c9ad18a7e3b147c95c8b9132831259722aa95c18 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 02:08:29 +0200
Subject: Rewrite CC_PTHREAD_RECURSIVE_MUTEX to use M4sh and AC_CACHE_CHECK.

---
 m4/pthreads.m4 | 34 ++++++++++++++++++----------------
 1 file changed, 18 insertions(+), 16 deletions(-)

(limited to 'm4')

diff --git a/m4/pthreads.m4 b/m4/pthreads.m4
index facac076f..653a496da 100644
--- a/m4/pthreads.m4
+++ b/m4/pthreads.m4
@@ -75,26 +75,28 @@ AC_DEFUN([CC_PTHREAD_FLAGS], [
 ])
 
 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 $PTHREAD_LIBS"
-    AC_COMPILE_IFELSE(AC_LANG_SOURCE([#include <pthread.h>
-
+  AC_REQUIRE([CC_PTHREAD_FLAGS])
+  AC_CACHE_CHECK(
+    [for recursive mutex support in pthread],
+    [cc_cv_pthread_recursive_mutex],
+    [ac_save_LIBS="$LIBS"
+     LIBS="$LIBS $PTHREAD_LIBS"
+     AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM([
+#include <pthread.h>
+          ], [
 int main() {
     pthread_mutexattr_t attr;
     pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
     return 0;
 }
-        ]), [have_recursive_mutex=yes], [have_recursive_mutex=no])
-    LIBS="$ac_save_LIBS"
-
-    AC_MSG_RESULT([$have_recursive_mutex])
+           ])
+	  ],
+	  [cc_cv_pthread_recursive_mutex=yes],
+	  [cc_cv_pthread_recursive_mutex=no])
+     LIBS="$ac_save_LIBS"
+    ])
 
-    if test x"$have_recursive_mutex" = x"yes"; then
-        ifelse([$1], , [:], [$1])
-    else
-        ifelse([$2], , [:], [$2])
-    fi
+  AS_IF([test x"$cc_cv_pthread_recursive_mutex" = x"yes"],
+    [$1], [$2])
 ])
-- 
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