(jm_PREREQ_MBSWIDTH): Check for wcwidth declaration.

diff --git a/m4/mbswidth.m4 b/m4/mbswidth.m4
index d18b26dc58b323682214b8bdcd9a2bcd2a61e410..d750c871d0180e436eb946d533e968332b15eee6 100644 (file)
--- a/m4/mbswidth.m4
+++ b/m4/mbswidth.m4
@@ -1,4 +1,4 @@
-#serial 1
+#serial 2
 
 dnl autoconf tests required for use of mbswidth.c
 dnl From Bruno Haible.
@@ -9,5 +9,11 @@ AC_DEFUN(jm_PREREQ_MBSWIDTH,
   AC_REQUIRE([AM_C_PROTOTYPES])
   AC_CHECK_HEADERS(limits.h stdlib.h string.h wchar.h wctype.h)
   AC_CHECK_FUNCS(isascii iswprint mbrtowc wcwidth)
+  headers='
+#     if HAVE_WCHAR_H
+#      include <wchar.h>
+#     endif
+'
+  AC_CHECK_DECLS([wcwidth], , , $headers)
   AC_MBSTATE_T
 ])