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-rw-r--r--m4/wmemchr.m425
1 files changed, 25 insertions, 0 deletions
diff --git a/m4/wmemchr.m4 b/m4/wmemchr.m4
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+# wmemchr.m4 serial 5
+dnl Copyright (C) 2011-2022 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.
+
+AC_DEFUN([gl_FUNC_WMEMCHR],
+[
+ AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
+ dnl We cannot use AC_CHECK_FUNCS here, because the MSVC 9 header files
+ dnl provide this function as an inline function definition.
+ AC_CACHE_CHECK([for wmemchr], [gl_cv_func_wmemchr],
+ [AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <wchar.h>
+ ]],
+ [[return ! wmemchr ((const wchar_t *) 0, (wchar_t) ' ', 0);]])
+ ],
+ [gl_cv_func_wmemchr=yes],
+ [gl_cv_func_wmemchr=no])
+ ])
+ if test $gl_cv_func_wmemchr = no; then
+ HAVE_WMEMCHR=0
+ fi
+])