[libc++] Introduce _LIBCPP_EXTERN_VIS to fix __libcpp_debug_function link errors Summary: On Windows tests that use `_LIBCPP_ASSERT` fail to link because the assertion handler function isn't correctly exported from the libc++ dylib. This patch fixes the dll import/export issues by introducing a new visibility macro `_LIBCPP_EXTERN_VIS` for use on external variables. Reviewers: compnerd, smeenai, EricWF Reviewed By: EricWF Subscribers: cfe-commits Differential Revision: https://reviews.llvm.org/D28728 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@292158 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/__debug b/include/__debug index d95e339..d01bacd 100644 --- a/include/__debug +++ b/include/__debug
@@ -74,7 +74,7 @@ /// __libcpp_debug_function - The handler function called when a _LIBCPP_ASSERT /// fails. -extern __libcpp_debug_function_type __libcpp_debug_function; +extern _LIBCPP_EXTERN_VIS __libcpp_debug_function_type __libcpp_debug_function; /// __libcpp_abort_debug_function - A debug handler that aborts when called. _LIBCPP_NORETURN _LIBCPP_FUNC_VIS
