# HG changeset patch
# User Bruno Haible <bruno@clisp.org>
# Date 1300057161 -3600
# Node ID 1d9adb689c1dcdf14abbd9065d95645bc0e52486
# Parent  37be2241027917c386f3fcd43023c3bf57a9a70e
passfd: Fix link error on AIX 5.2.

* m4/afunix.m4 (gl_SOCKET_AFUNIX): Define _LINUX_SOURCE_COMPAT.

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2011-03-13  Bruno Haible  <bruno@clisp.org>
+
+	passfd: Fix link error on AIX 5.2.
+	* m4/afunix.m4 (gl_SOCKET_AFUNIX): Define _LINUX_SOURCE_COMPAT.
+
 2011-03-13  Bruno Haible  <bruno@clisp.org>
 
 	passfd: Work around bug with CMSG_FIRSTHDR on FreeBSD 6.4.
diff --git a/m4/afunix.m4 b/m4/afunix.m4
--- a/m4/afunix.m4
+++ b/m4/afunix.m4
@@ -1,4 +1,4 @@
-# afunix.m4 serial 4
+# afunix.m4 serial 5
 dnl Copyright (C) 2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -38,6 +38,10 @@
       [Define to 1 if <sys/socket.h> defines SCM_RIGHTS.])
   fi
 
+  dnl Persuade AIX 5.2 <sys/socket.h> to declare CMSG_SPACE, CMSG_LEN.
+  AC_DEFINE([_LINUX_SOURCE_COMPAT], [1],
+    [Define in order to get some macros on AIX systems.])
+
   AC_MSG_CHECKING([for UNIX domain sockets SCM_RIGHTS that behave in BSD4.4 way])
   AC_CACHE_VAL([gl_cv_socket_unix_scm_rights_bsd44_way],
     [AC_COMPILE_IFELSE(