source: branches/fscctrl_safety_limits/.macro_dir/ax_cxx_compile_stdcxx_0x.m4

Last change on this file was 12767, checked in by tbretz, 13 years ago
Taken the latest version from teh archive to get it working with gcc 4.5
File size: 2.9 KB
Line 
1# ============================================================================
2# http://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx_0x.html
3# ============================================================================
4#
5# SYNOPSIS
6#
7# AX_CXX_COMPILE_STDCXX_0X
8#
9# DESCRIPTION
10#
11# Check for baseline language coverage in the compiler for the C++0x
12# standard.
13#
14# LICENSE
15#
16# Copyright (c) 2008 Benjamin Kosnik <bkoz@redhat.com>
17#
18# Copying and distribution of this file, with or without modification, are
19# permitted in any medium without royalty provided the copyright notice
20# and this notice are preserved. This file is offered as-is, without any
21# warranty.
22
23#serial 7
24
25AU_ALIAS([AC_CXX_COMPILE_STDCXX_0X], [AX_CXX_COMPILE_STDCXX_0X])
26AC_DEFUN([AX_CXX_COMPILE_STDCXX_0X], [
27 AC_CACHE_CHECK(if g++ supports C++0x features without additional flags,
28 ax_cv_cxx_compile_cxx0x_native,
29 [AC_LANG_SAVE
30 AC_LANG_CPLUSPLUS
31 AC_TRY_COMPILE([
32 template <typename T>
33 struct check
34 {
35 static_assert(sizeof(int) <= sizeof(T), "not big enough");
36 };
37
38 typedef check<check<bool>> right_angle_brackets;
39
40 int a;
41 decltype(a) b;
42
43 typedef check<int> check_type;
44 check_type c;
45 check_type&& cr = static_cast<check_type&&>(c);],,
46 ax_cv_cxx_compile_cxx0x_native=yes, ax_cv_cxx_compile_cxx0x_native=no)
47 AC_LANG_RESTORE
48 ])
49
50 AC_CACHE_CHECK(if g++ supports C++0x features with -std=c++0x,
51 ax_cv_cxx_compile_cxx0x_cxx,
52 [AC_LANG_SAVE
53 AC_LANG_CPLUSPLUS
54 ac_save_CXXFLAGS="$CXXFLAGS"
55 CXXFLAGS="$CXXFLAGS -std=c++0x"
56 AC_TRY_COMPILE([
57 template <typename T>
58 struct check
59 {
60 static_assert(sizeof(int) <= sizeof(T), "not big enough");
61 };
62
63 typedef check<check<bool>> right_angle_brackets;
64
65 int a;
66 decltype(a) b;
67
68 typedef check<int> check_type;
69 check_type c;
70 check_type&& cr = static_cast<check_type&&>(c);],,
71 ax_cv_cxx_compile_cxx0x_cxx=yes, ax_cv_cxx_compile_cxx0x_cxx=no)
72 CXXFLAGS="$ac_save_CXXFLAGS"
73 AC_LANG_RESTORE
74 ])
75
76 AC_CACHE_CHECK(if g++ supports C++0x features with -std=gnu++0x,
77 ax_cv_cxx_compile_cxx0x_gxx,
78 [AC_LANG_SAVE
79 AC_LANG_CPLUSPLUS
80 ac_save_CXXFLAGS="$CXXFLAGS"
81 CXXFLAGS="$CXXFLAGS -std=gnu++0x"
82 AC_TRY_COMPILE([
83 template <typename T>
84 struct check
85 {
86 static_assert(sizeof(int) <= sizeof(T), "not big enough");
87 };
88
89 typedef check<check<bool>> right_angle_brackets;
90
91 int a;
92 decltype(a) b;
93
94 typedef check<int> check_type;
95 check_type c;
96 check_type&& cr = static_cast<check_type&&>(c);],,
97 ax_cv_cxx_compile_cxx0x_gxx=yes, ax_cv_cxx_compile_cxx0x_gxx=no)
98 CXXFLAGS="$ac_save_CXXFLAGS"
99 AC_LANG_RESTORE
100 ])
101
102 if test "$ax_cv_cxx_compile_cxx0x_native" = yes ||
103 test "$ax_cv_cxx_compile_cxx0x_cxx" = yes ||
104 test "$ax_cv_cxx_compile_cxx0x_gxx" = yes; then
105 AC_DEFINE(HAVE_STDCXX_0X,,[Define if g++ supports C++0x features. ])
106 fi
107])
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