23 lines
877 B
Plaintext
23 lines
877 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_reinterpret_cast.html
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dnl
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AC_DEFUN([AC_CXX_REINTERPRET_CAST],
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[AC_CACHE_CHECK(whether the compiler supports reinterpret_cast<>,
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ac_cv_cxx_reinterpret_cast,
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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 : Base () {} virtual void f () = 0;};
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class Derived : public Base { public : Derived () {} virtual void f () {} };
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class Unrelated { public : Unrelated () {} };
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int g (Unrelated&) { return 0; }],[
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Derived d;Base& b=d;Unrelated& e=reinterpret_cast<Unrelated&>(b);return g(e);],
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ac_cv_cxx_reinterpret_cast=yes, ac_cv_cxx_reinterpret_cast=no)
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AC_LANG_RESTORE
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])
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if test "$ac_cv_cxx_reinterpret_cast" = yes; then
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AC_DEFINE(HAVE_REINTERPRET_CAST,,
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[define if the compiler supports reinterpret_cast<>])
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fi
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])
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