30 lines
870 B
Plaintext
30 lines
870 B
Plaintext
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dnl Available from the GNU Autoconf Macro Archive at:
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dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_rtti.html
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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,,
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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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