Mercurial > hg > octave-lyh > gnulib-hg
changeset 15818:5153214d4eaa
wmemcmp: Support for MSVC.
* m4/wmemcmp.m4 (gl_FUNC_WMEMCMP): Use a small test program to test
whether wmemcmp() exists.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Tue, 04 Oct 2011 01:49:09 +0200 |
parents | 5d2a7ba94045 |
children | d6ada339c261 |
files | ChangeLog m4/wmemcmp.m4 |
diffstat | 2 files changed, 27 insertions(+), 3 deletions(-) [+] |
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--- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,9 @@ +2011-10-03 Bruno Haible <bruno@clisp.org> + + wmemcmp: Support for MSVC. + * m4/wmemcmp.m4 (gl_FUNC_WMEMCMP): Use a small test program to test + whether wmemcmp() exists. + 2011-10-03 Bruno Haible <bruno@clisp.org> wmemchr: Support for MSVC.
--- a/m4/wmemcmp.m4 +++ b/m4/wmemcmp.m4 @@ -1,4 +1,4 @@ -# wmemcmp.m4 serial 2 +# wmemcmp.m4 serial 3 dnl Copyright (C) 2011 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -7,8 +7,26 @@ AC_DEFUN([gl_FUNC_WMEMCMP], [ AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) - AC_CHECK_FUNCS_ONCE([wmemcmp]) - if test $ac_cv_func_wmemcmp = no; then + 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 wmemcmp], [gl_cv_func_wmemcmp], + [AC_COMPILE_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 ! wmemcmp ((const wchar_t *) 0, (const wchar_t *) 0, 0);]]) + ], + [gl_cv_func_wmemcmp=yes], + [gl_cv_func_wmemcmp=no]) + ]) + if test $gl_cv_func_wmemcmp = no; then HAVE_WMEMCMP=0 fi ])