X-Git-Url: https://git.dogcows.com/gitweb?a=blobdiff_plain;f=m4%2Fmbrtowc.m4;h=f15bb2214c8db7e478b2cb8be0842c0aa686b368;hb=a349bd80b9eb714f67d7f4174add54ea4fbe04d8;hp=3e2269cd15cf08aed984dbff77d2c983e63d01a3;hpb=27addf0e3f2222974148137ae4255e74dc70f434;p=chaz%2Ftar

diff --git a/m4/mbrtowc.m4 b/m4/mbrtowc.m4
index 3e2269c..f15bb22 100644
--- a/m4/mbrtowc.m4
+++ b/m4/mbrtowc.m4
@@ -4,16 +4,16 @@ dnl From Paul Eggert
 
 AC_DEFUN(jm_FUNC_MBRTOWC,
 [
-  AC_MSG_CHECKING([whether mbrtowc is declared])
+  AC_MSG_CHECKING([whether mbrtowc and mbstate_t are properly declared])
   AC_CACHE_VAL(jm_cv_func_mbrtowc,
     [AC_TRY_LINK(
        [#include <wchar.h>],
-       [return !mbrtowc;],
+       [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 exists and is properly declared.])
+      [Define to 1 if mbrtowc and mbstate_t are properly declared.])
   fi
 ])