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Introduce _LIBCPP_DEPRECATED_ABI_EXTERNAL_ERROR_CATEGORY_CONSTRUCTOR ABI option.

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Currently libc++ compiles a special version of error_category()
into the dylib. This definition is no longer needed, and doesn't
work on Windows due to dllimport/dllexport semantics.

For those reasons this patch introduces an option to
disable/enable this definition. By default the definition
is provided in ABI v1 except on windows. This patch
also addresses D28210.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@290840 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Fiselier
2017-01-02 22:17:51 +00:00
parent ea38cde827
commit 4b07f98816
3 changed files with 8 additions and 1 deletions
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3
include/system_error
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@@ -384,7 +384,8 @@ class _LIBCPP_TYPE_VIS error_category
public:
virtual ~error_category() _NOEXCEPT;
#ifdef _LIBCPP_BUILDING_SYSTEM_ERROR
#if defined(_LIBCPP_BUILDING_SYSTEM_ERROR) && \
defined(_LIBCPP_DEPRECATED_ABI_EXTERNAL_ERROR_CATEGORY_CONSTRUCTOR)
error_category() _NOEXCEPT;
#else
_LIBCPP_ALWAYS_INLINE