summaryrefslogtreecommitdiff
path: root/m4/ax_cxx_const_cast.m4
blob: eebb041291c01f8e445de1810fd6a619a3b8696c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
# ===========================================================================
#        http://www.nongnu.org/autoconf-archive/ax_cxx_const_cast.html
# ===========================================================================
#
# SYNOPSIS
#
#   AX_CXX_CONST_CAST
#
# DESCRIPTION
#
#   If the compiler supports const_cast<>, define HAVE_CONST_CAST.
#
# LICENSE
#
#   Copyright (c) 2008 Todd Veldhuizen
#   Copyright (c) 2008 Luc Maisonobe <luc@spaceroots.org>
#
#   Copying and distribution of this file, with or without modification, are
#   permitted in any medium without royalty provided the copyright notice
#   and this notice are preserved.

AU_ALIAS([AC_CXX_CONST_CAST], [AX_CXX_CONST_CAST])
AC_DEFUN([AX_CXX_CONST_CAST],
[AC_CACHE_CHECK(whether the compiler supports const_cast<>,
ax_cv_cxx_const_cast,
[AC_LANG_SAVE
 AC_LANG_CPLUSPLUS
 AC_TRY_COMPILE(,[int x = 0;const int& y = x;int& z = const_cast<int&>(y);return z;],
 ax_cv_cxx_const_cast=yes, ax_cv_cxx_const_cast=no)
 AC_LANG_RESTORE
])
if test "$ax_cv_cxx_const_cast" = yes; then
  AC_DEFINE(HAVE_CONST_CAST,,[define if the compiler supports const_cast<>])
fi
])