X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fwcpcpy.m4;h=b23c0ef9ba01725abe9853b58316f891e53e6977;hb=264aa350f10afaedbd96ca64f232c8b4498a37f4;hp=5ffe1a12e0b2b92cef74aaeae3796069f37135c8;hpb=0fd07686f8cf0e1f3e025f3598090d938dbf4e80;p=gnulib.git

diff --git a/m4/wcpcpy.m4 b/m4/wcpcpy.m4
index 5ffe1a12e..b23c0ef9b 100644
--- a/m4/wcpcpy.m4
+++ b/m4/wcpcpy.m4
@@ -1,4 +1,4 @@
-# wcpcpy.m4 serial 1
+# wcpcpy.m4 serial 2
 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,
@@ -7,6 +7,10 @@ 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