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Diffstat (limited to '')
| -rw-r--r-- | gl/m4/wmemchr.m4 | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/gl/m4/wmemchr.m4 b/gl/m4/wmemchr.m4 new file mode 100644 index 0000000..62bd89c --- /dev/null +++ b/gl/m4/wmemchr.m4 @@ -0,0 +1,32 @@ +# wmemchr.m4 serial 4 +dnl Copyright (C) 2011-2020 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([[ +/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before + <wchar.h>. + BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included + before <wchar.h>. */ +#include <stddef.h> +#include <stdio.h> +#include <time.h> +#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 +]) |