openat: Work around compilation error with OSF/1 5.1 DTK cc.

[gnulib.git] / m4 / wcpcpy.m4

diff --git a/m4/wcpcpy.m4 b/m4/wcpcpy.m4
index 5ffe1a1..0d84e84 100644 (file)
--- a/m4/wcpcpy.m4
+++ b/m4/wcpcpy.m4
@@ -1,4 +1,4 @@
-# wcpcpy.m4 serial 1
+# wcpcpy.m4 serial 3
 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,
@@ -7,9 +7,12 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_WCPCPY],
 [
   AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+
+  dnl Persuade glibc <wchar.h> to declare wcpcpy().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
   AC_CHECK_FUNCS_ONCE([wcpcpy])
   if test $ac_cv_func_wcpcpy = no; then
     HAVE_WCPCPY=0
-    AC_LIBOBJ([wcpcpy])
   fi
 ])