[libdispatch-changes] [32] trunk

[source_changes at macosforge.org]

Revision: 32
          http://trac.macosforge.org/projects/libdispatch/changeset/32
Author:   robert at fledge.watson.org
Date:     2009-09-15 02:53:59 -0700 (Tue, 15 Sep 2009)
Log Message:
-----------
Detect when __private_extern__ isn't present on a platform and use a
compatibility define.  It's not clear "extern" this is the best possible
substitute, so we may want to change it.

Modified Paths:
--------------
    trunk/configure.ac
    trunk/src/internal.h

Added Paths:
-----------
    trunk/compat/private_extern.h

Added: trunk/compat/private_extern.h
===================================================================
--- trunk/compat/private_extern.h	                        (rev 0)
+++ trunk/compat/private_extern.h	2009-09-15 09:53:59 UTC (rev 32)
@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2009 Apple Inc. All rights reserved.
+ *
+ * @APPLE_APACHE_LICENSE_HEADER_START@
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * 
+ * @APPLE_APACHE_LICENSE_HEADER_END@
+ */
+
+#ifndef __APPLE_H__
+#define __APPLE_H__
+
+#define	__private_extern__	extern
+
+#endif /* __APPLE_H__ */

Modified: trunk/configure.ac
===================================================================
--- trunk/configure.ac	2009-09-15 09:43:14 UTC (rev 31)
+++ trunk/configure.ac	2009-09-15 09:53:59 UTC (rev 32)
@@ -152,6 +152,16 @@
 AC_CHECK_FUNCS([pthread_key_init_np mach_absolute_time malloc_create_zone sem_init])
 
 #
+# Does the platform support __private_extern__?  There is surely a better way
+# to check this.
+#
+AC_TRY_LINK([], [
+	__private_extern__ int foo;
+], [
+  AC_DEFINE(HAVE_PRIVATE_EXTERN,, Define if __private_extern__ present)
+])
+
+#
 # Generate Makefiles.
 #
 AC_CONFIG_FILES([Makefile src/Makefile])

Modified: trunk/src/internal.h
===================================================================
--- trunk/src/internal.h	2009-09-15 09:43:14 UTC (rev 31)
+++ trunk/src/internal.h	2009-09-15 09:53:59 UTC (rev 32)
@@ -41,6 +41,9 @@
 #else
 #include <compat/Availability.h>
 #endif
+#ifndef HAVE_PRIVATE_EXTERN
+#include <compat/private_extern.h>
+#endif
 
 #include "dispatch.h"
 #include "base.h"
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