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[libcxxabi] Define _LIBCXXABI_WEAK properly for mingw compilers

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Copy over the compiler detection structure from libcxx, and set
_LIBCXXABI_WEAK like _LIBCPP_WEAK is set in libcxx.

This allows users to override operator new/delete, if using those
operators from libcxxabi instead of from libcxx.

Differential Revision: https://reviews.llvm.org/D89863
This commit is contained in:
Martin Storsjö 2020-10-21 09:11:31 +03:00
parent 8e8cc587a5
commit 5449ea9f90
1 changed files with 14 additions and 1 deletions
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15
libcxxabi/include/__cxxabi_config.h
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@ -18,6 +18,19 @@
#define __has_attribute(_attribute_) 0
#endif
#if defined(__clang__)
# define _LIBCXXABI_COMPILER_CLANG
# ifndef __apple_build_version__
# define _LIBCXXABI_CLANG_VER (__clang_major__ * 100 + __clang_minor__)
# endif
#elif defined(__GNUC__)
# define _LIBCXXABI_COMPILER_GCC
#elif defined(_MSC_VER)
# define _LIBCXXABI_COMPILER_MSVC
#elif defined(__IBMCPP__)
# define _LIBCXXABI_COMPILER_IBM
#endif
#if defined(_WIN32)
#if defined(_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS)
#define _LIBCXXABI_HIDDEN
@ -53,7 +66,7 @@
#endif
#endif
#if defined(_WIN32)
#if defined(_LIBCXXABI_COMPILER_MSVC)
#define _LIBCXXABI_WEAK
#else
#define _LIBCXXABI_WEAK __attribute__((__weak__))