annotate m4/mbstate_t.m4 @ 15857:6b8400199763

New module 'sqrtf'. * lib/math.in.h (sqrtf): New declaration. * lib/sqrtf.c: New file. * m4/sqrtf.m4: New file. * m4/math_h.m4 (gl_MATH_H): Test whether sqrtf is declared. (gl_MATH_H_DEFAULTS): Initialize GNULIB_SQRTF, HAVE_SQRTF. * modules/math (Makefile.am): Substitute GNULIB_SQRTF, HAVE_SQRTF. * modules/sqrtf: New file. * tests/test-math-c++.cc: Check the declaration of sqrtf. * doc/posix-functions/sqrtf.texi: Mention the new module.
author Bruno Haible <bruno@clisp.org>
date Sat, 08 Oct 2011 21:16:48 +0200
parents 97fc9a21a8fb
children 8250f2777afc
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1 # mbstate_t.m4 serial 13
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2 dnl Copyright (C) 2000-2002, 2008-2011 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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7 # From Paul Eggert.
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8
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9 # BeOS 5 has <wchar.h> but does not define mbstate_t,
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10 # so you can't declare an object of that type.
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11 # Check for this incompatibility with Standard C.
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12
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13 # AC_TYPE_MBSTATE_T
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14 # -----------------
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15 AC_DEFUN([AC_TYPE_MBSTATE_T],
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16 [
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17 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) dnl for HP-UX 11.11
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18
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19 AC_CACHE_CHECK([for mbstate_t], [ac_cv_type_mbstate_t],
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20 [AC_COMPILE_IFELSE(
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21 [AC_LANG_PROGRAM(
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22 [AC_INCLUDES_DEFAULT[
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23 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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24 <wchar.h>.
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25 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
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26 included before <wchar.h>. */
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27 #include <stddef.h>
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28 #include <stdio.h>
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29 #include <time.h>
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30 #include <wchar.h>]],
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31 [[mbstate_t x; return sizeof x;]])],
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32 [ac_cv_type_mbstate_t=yes],
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33 [ac_cv_type_mbstate_t=no])])
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34 if test $ac_cv_type_mbstate_t = yes; then
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35 AC_DEFINE([HAVE_MBSTATE_T], [1],
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36 [Define to 1 if <wchar.h> declares mbstate_t.])
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37 else
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38 AC_DEFINE([mbstate_t], [int],
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39 [Define to a type if <wchar.h> does not define.])
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40 fi
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41 ])