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
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_cxx_rtti.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_CXX_RTTI
#
# DESCRIPTION
#
# If the compiler supports Run-Time Type Identification (typeinfo header
# and typeid keyword), define HAVE_RTTI.
#
# 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. This file is offered as-is, without any
# warranty.
#serial 8
AU_ALIAS([AC_CXX_RTTI], [AX_CXX_RTTI])
AC_DEFUN([AX_CXX_RTTI],
[AC_CACHE_CHECK(whether the compiler supports Run-Time Type Identification,
ax_cv_cxx_rtti,
[AC_LANG_PUSH([C++])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <typeinfo>
class Base { public :
Base () {}
virtual int f () { return 0; }
};
class Derived : public Base { public :
Derived () {}
virtual int f () { return 1; }
};
]], [[Derived d;
Base *ptr = &d;
return typeid (*ptr) == typeid (Derived);
]])],
[ax_cv_cxx_rtti=yes], [ax_cv_cxx_rtti=no])
AC_LANG_POP([C++])
])
if test "$ax_cv_cxx_rtti" = yes; then
AC_DEFINE(HAVE_RTTI,,
[define if the compiler supports Run-Time Type Identification])
fi
])
|
