fnmatch.m4 to check functions and headers just once

[Paul Eggert]

There's enough overlap with other modules now that we should just
check for this stuff once.  I installed this:

2007-01-24  Paul Eggert  <address@hidden>

        * m4/fnmatch.m4 (_AC_LIBOBJ_FNMATCH): Check for headers and
        functions just once.

--- m4/fnmatch.m4       25 Jan 2007 00:40:06 -0000      1.28
+++ m4/fnmatch.m4       25 Jan 2007 00:43:00 -0000
@@ -83,8 +83,8 @@ AC_DEFUN([_AC_LIBOBJ_FNMATCH],
 [AC_REQUIRE([AC_FUNC_ALLOCA])dnl
 AC_REQUIRE([AC_TYPE_MBSTATE_T])dnl
 AC_CHECK_DECLS([isblank], [], [], [#include <ctype.h>])
-AC_CHECK_FUNCS([btowc iswctype mbsrtowcs mempcpy wmemchr wmemcpy wmempcpy])
-AC_CHECK_HEADERS([wctype.h])
+AC_CHECK_FUNCS_ONCE([btowc iswctype mbsrtowcs mempcpy wmemchr wmemcpy 
wmempcpy])
+AC_CHECK_HEADERS_ONCE([wctype.h])
 AC_LIBOBJ([fnmatch])
 FNMATCH_H=fnmatch.h
 ])# _AC_LIBOBJ_FNMATCH