X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fgetdate.m4;h=67f9c6566da136f77dc1f5592a62271c75ff9114;hb=2f23fbb2ce253697930e8f769e13134f9be81363;hp=febcfac4ca9fbc6176db11be86abfd310e677ff2;hpb=842cb4686c65185e128d92cd84afa1fc77d8ec81;p=gnulib.git

diff --git a/m4/getdate.m4 b/m4/getdate.m4
index febcfac4c..67f9c6566 100644
--- a/m4/getdate.m4
+++ b/m4/getdate.m4
@@ -1,18 +1,25 @@
-# getdate.m4 serial 11
-dnl Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+# getdate.m4 serial 14
+dnl Copyright (C) 2002-2006, 2008, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 
+dnl Define HAVE_COMPOUND_LITERALS if the C compiler supports compound literals
+dnl as in ISO C99.
+dnl Note that compound literals such as (struct s) { 3, 4 } can be used for
+dnl initialization of stack-allocated variables, but are not constant
+dnl expressions and therefore cannot be used as initializer for global or
+dnl static variables (even though gcc supports this in pre-C99 mode).
 AC_DEFUN([gl_C_COMPOUND_LITERALS],
 [
-  AC_CACHE_CHECK([for compound literals], gl_cv_compound_literals,
-  [AC_TRY_COMPILE([struct s { int i, j; }; struct s s = (struct s) { 1, 2 };],
-    [struct s t = (struct s) { 3, 4 };],
+  AC_CACHE_CHECK([for compound literals], [gl_cv_compound_literals],
+  [AC_TRY_COMPILE([struct s { int i, j; };],
+    [struct s t = (struct s) { 3, 4 };
+     if (t.i != 0) return 0;],
     gl_cv_compound_literals=yes,
     gl_cv_compound_literals=no)])
   if test $gl_cv_compound_literals = yes; then
-    AC_DEFINE(HAVE_COMPOUND_LITERALS, 1,
+    AC_DEFINE([HAVE_COMPOUND_LITERALS], [1],
       [Define if you have compound literals.])
   fi
 ])