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authorHolger Weiss <holger@zedat.fu-berlin.de>2013-08-19 21:27:12 (GMT)
committerHolger Weiss <holger@zedat.fu-berlin.de>2013-08-19 21:27:12 (GMT)
commit26fbe7f1e68bb0c96da32491efcf3696fe6c299b (patch)
treec4d95289187a64e9c7517bf73d8208026c3d2fb3 /gl/m4/mode_t.m4
parent5f79e3e9f62ca5487d9881973149136ba1d19d3e (diff)
downloadmonitoring-plugins-26fbe7f1e68bb0c96da32491efcf3696fe6c299b.tar.gz
Sync with the latest Gnulib code (6f2d632)
Diffstat (limited to 'gl/m4/mode_t.m4')
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1# mode_t.m4 serial 2
2dnl Copyright (C) 2009-2010 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7# For using mode_t, it's sufficient to use AC_TYPE_MODE_T and
8# include <sys/types.h>.
9
10# Define PROMOTED_MODE_T to the type that is the result of "default argument
11# promotion" (ISO C 6.5.2.2.(6)) of the type mode_t.
12AC_DEFUN([gl_PROMOTED_TYPE_MODE_T],
13[
14 AC_REQUIRE([AC_TYPE_MODE_T])
15 AC_CACHE_CHECK([for promoted mode_t type], [gl_cv_promoted_mode_t], [
16 dnl Assume mode_t promotes to 'int' if and only if it is smaller than 'int',
17 dnl and to itself otherwise. This assumption is not guaranteed by the ISO C
18 dnl standard, but we don't know of any real-world counterexamples.
19 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>]],
20 [[typedef int array[2 * (sizeof (mode_t) < sizeof (int)) - 1];]])],
21 [gl_cv_promoted_mode_t='int'],
22 [gl_cv_promoted_mode_t='mode_t'])
23 ])
24 AC_DEFINE_UNQUOTED([PROMOTED_MODE_T], [$gl_cv_promoted_mode_t],
25 [Define to the type that is the result of default argument promotions of type mode_t.])
26])