Modernize AC_TRY_COMPILE invocations.

[gnulib.git] / m4 / lock.m4

diff --git a/m4/lock.m4 b/m4/lock.m4
index 9da8465..f71c664 100644 (file)
--- a/m4/lock.m4
+++ b/m4/lock.m4
@@ -1,4 +1,4 @@
-# lock.m4 serial 10 (gettext-0.18)
+# lock.m4 serial 11 (gettext-0.18.2)
 dnl Copyright (C) 2005-2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -18,13 +18,17 @@ AC_DEFUN([gl_LOCK],
       [],
       [#include <pthread.h>])
     # glibc defines PTHREAD_MUTEX_RECURSIVE as enum, not as a macro.
-    AC_TRY_COMPILE([#include <pthread.h>],
-      [#if __FreeBSD__ == 4
+    AC_COMPILE_IFELSE([
+      AC_LANG_PROGRAM(
+        [[#include <pthread.h>]],
+        [[
+#if __FreeBSD__ == 4
 error "No, in FreeBSD 4.0 recursive mutexes actually don't work."
 #else
 int x = (int)PTHREAD_MUTEX_RECURSIVE;
 return !x;
-#endif],
+#endif
+        ]])],
       [AC_DEFINE([HAVE_PTHREAD_MUTEX_RECURSIVE], [1],
          [Define if the <pthread.h> defines PTHREAD_MUTEX_RECURSIVE.])])
   fi