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33 lines
1.1 KiB
Plaintext
33 lines
1.1 KiB
Plaintext
# wmemcmp.m4 serial 3
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dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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AC_DEFUN([gl_FUNC_WMEMCMP],
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[
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AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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dnl We cannot use AC_CHECK_FUNCS here, because the MSVC 9 header files
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dnl provide this function as an inline function definition.
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AC_CACHE_CHECK([for wmemcmp], [gl_cv_func_wmemcmp],
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[AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM([[
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/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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<wchar.h>.
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BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
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before <wchar.h>. */
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#include <stddef.h>
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#include <stdio.h>
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#include <time.h>
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#include <wchar.h>
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]],
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[[return ! wmemcmp ((const wchar_t *) 0, (const wchar_t *) 0, 0);]])
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],
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[gl_cv_func_wmemcmp=yes],
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[gl_cv_func_wmemcmp=no])
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])
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if test $gl_cv_func_wmemcmp = no; then
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HAVE_WMEMCMP=0
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fi
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])
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