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G M: Fix libcxx's detection of rtti disablement for g++.exe and cl.exe. When RTTI is NOT enabled, _LIBCPP_NO_RTTI is defined.

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git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@191981 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Howard Hinnant 2013-10-04 21:24:21 +00:00
parent f7555069ab
commit f677bc4165
1 changed files with 12 additions and 0 deletions
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12
include/__config
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@ -590,4 +590,16 @@ template <unsigned> struct __static_assert_check {};
#define _LIBCPP_DEPRECATED_AFTER_CXX11 [[deprecated]]
#endif
// Try to find out if RTTI is disabled.
// g++ and cl.exe have RTTI on by default and define a macro when it is.
// g++ only defines the macro in 4.3.2 and onwards.
#if !defined(_LIBCPP_NO_RTTI)
# if defined(__GNUG__) && (__GNUC__ >= 4 && \
(__GNUC_MINOR__ >= 3 || __GNUC_PATCHLEVEL__ >= 2)) && !defined(__GXX_RTTI)
# define _LIBCPP_NO_RTTI
# elif (defined(_MSC_VER) && !defined(__clang__)) && !defined(_CPPRTTI)
# define _LIBCPP_NO_RTTI
# endif
#endif
#endif // _LIBCPP_CONFIG