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annotate m4/wmemset.m4 @ 40057:b06060465f09

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maint: Run 'make update-copyright'
author Paul Eggert <eggert@cs.ucla.edu>
date Tue, 01 Jan 2019 00:25:11 +0100
parents 10eb9086bea0
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # wmemset.m4 serial 3
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2 dnl Copyright (C) 2011-2019 Free Software Foundation, Inc.
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3 dnl This file is free software; the Free Software Foundation
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4 dnl gives unlimited permission to copy and/or distribute it,
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5 dnl with or without modifications, as long as this notice is preserved.
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6
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7 AC_DEFUN([gl_FUNC_WMEMSET],
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8 [
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9 AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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10 dnl We cannot use AC_CHECK_FUNCS here, because the MSVC 9 header files
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11 dnl provide this function as an inline function definition.
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12 AC_CACHE_CHECK([for wmemset], [gl_cv_func_wmemset],
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13 [AC_COMPILE_IFELSE(
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14 [AC_LANG_PROGRAM([[
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15 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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16 <wchar.h>.
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17 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
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18 before <wchar.h>. */
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19 #include <stddef.h>
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20 #include <stdio.h>
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21 #include <time.h>
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22 #include <wchar.h>
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23 ]],
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24 [[return ! wmemset ((wchar_t *) 0, (wchar_t) ' ', 0);]])
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25 ],
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26 [gl_cv_func_wmemset=yes],
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27 [gl_cv_func_wmemset=no])
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28 ])
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29 if test $gl_cv_func_wmemset = no; then
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30 HAVE_WMEMSET=0
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31 fi
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32 ])