35 lines
998 B
Plaintext
35 lines
998 B
Plaintext
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dnl @synopsis AC_CXX_RTTI
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dnl
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dnl If the compiler supports Run-Time Type Identification (typeinfo
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dnl header and typeid keyword), define HAVE_RTTI.
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dnl
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dnl @version $Id: ac_cxx_rtti.m4,v 1.1 2001/06/02 22:29:52 smr99 Exp $
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dnl @author Luc Maisonobe
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dnl
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AC_DEFUN([AC_CXX_RTTI],
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[AC_CACHE_CHECK(whether the compiler supports Run-Time Type Identification,
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ac_cv_cxx_rtti,
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[AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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AC_TRY_COMPILE([#include <typeinfo>
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class Base { public :
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Base () {}
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virtual int f () { return 0; }
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};
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class Derived : public Base { public :
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Derived () {}
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virtual int f () { return 1; }
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};
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],[Derived d;
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Base *ptr = &d;
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return typeid (*ptr) == typeid (Derived);
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],
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ac_cv_cxx_rtti=yes, ac_cv_cxx_rtti=no)
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AC_LANG_RESTORE
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])
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if test "$ac_cv_cxx_rtti" = yes; then
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AC_DEFINE(HAVE_RTTI,1,
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[define if the compiler supports Run-Time Type Identification])
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fi
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])
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