# HG changeset patch
# User Jim Meyering <jim@meyering.net>
# Date 982402405 0
# Node ID 9e312d4334b85812e73698c2f8f4ce55b33b25bd
# Parent  4bf493c1699559cbd85eb7e3546b08ed3e2dff87
New file, defining jm_FUNC_MBRTOWC.

diff --git a/m4/mbrtowc.m4 b/m4/mbrtowc.m4
new file mode 100644
--- /dev/null
+++ b/m4/mbrtowc.m4
@@ -0,0 +1,19 @@
+#serial 1
+
+dnl From Paul Eggert
+
+AC_DEFUN(jm_FUNC_MBRTOWC,
+[
+  AC_MSG_CHECKING([whether mbrtowc and mbstate_t are properly declared])
+  AC_CACHE_VAL(jm_cv_func_mbrtowc,
+    [AC_TRY_LINK(
+       [#include <wchar.h>],
+       [mbstate_t state; return ! (sizeof state && mbrtowc);],
+       [jm_cv_func_mbrtowc=yes],
+       [jm_cv_func_mbrtowc=no])])
+  if test $jm_cv_func_mbrtowc = yes; then
+    AC_MSG_RESULT(yes)
+    AC_DEFINE(HAVE_MBRTOWC, 1,
+      [Define to 1 if mbrtowc and mbstate_t are properly declared.])
+  fi
+])