Make it possible to use a locally augmented gnulib.

[gnulib.git] / m4 / mbchar.m4

diff --git a/m4/mbchar.m4 b/m4/mbchar.m4
index dd613cb..ec4cbab 100644 (file)
--- a/m4/mbchar.m4
+++ b/m4/mbchar.m4
@@ -1,5 +1,5 @@
-# mbchar.m4 serial 1
-dnl Copyright (C) 2005 Free Software Foundation, Inc.
+# mbchar.m4 serial 3
+dnl Copyright (C) 2005-2006 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.
@@ -10,5 +10,13 @@ dnl From Bruno Haible.
 AC_DEFUN([gl_MBCHAR],
 [
   AC_REQUIRE([AC_GNU_SOURCE])
-  :
+  dnl The following line is that so the user can test
+  dnl HAVE_WCHAR_H && HAVE_WCTYPE_H before #include "mbchar.h".
+  AC_CHECK_HEADERS_ONCE(wchar.h wctype.h)
+  dnl Compile mbchar.c only if HAVE_WCHAR_H && HAVE_WCTYPE_H.
+  if test $ac_cv_header_wchar_h = yes && test $ac_cv_header_wctype_h = yes; then
+    AC_LIBOBJ([mbchar])
+    dnl Prerequisites of mbchar.h and mbchar.c.
+    AC_CHECK_FUNCS([iswcntrl])
+  fi
 ])