From: Martin Storsjö <martin@martin.st>
Date: Sat, 15 Apr 2023 21:58:51 +0000 (+0000)
Subject: [libcxxabi] Omit dllimport in public headers in MinGW mode
X-Git-Tag: upstream/17.0.6~11103
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=692518d04b2d170b1ae10c50843e7c497c4a9922;p=platform%2Fupstream%2Fllvm.git

[libcxxabi] Omit dllimport in public headers in MinGW mode

This matches the corresponding change to libcxx headers in
dfa88927ae1411ccc3b248b7e624f2acf623d947.

This avoids needing to define _LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS
when building libcxxabi tests, for two reasons:
- It defaults to normal linkage (as opposed to dllimport), fixing
  linking of a static library version of libcxx/libcxxabi
- It avoids issues with using dllimport declarations on symbols when
  including cxxabi implementations into the testcase itself

Differential Revision: https://reviews.llvm.org/D148441
---

diff --git a/libcxxabi/include/__cxxabi_config.h b/libcxxabi/include/__cxxabi_config.h
index c97dd65..e8aa37e 100644
--- a/libcxxabi/include/__cxxabi_config.h
+++ b/libcxxabi/include/__cxxabi_config.h
@@ -32,7 +32,7 @@
 #endif
 
 #if defined(_WIN32)
- #if defined(_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS)
+ #if defined(_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS) || (defined(__MINGW32__) && !defined(_LIBCXXABI_BUILDING_LIBRARY))
   #define _LIBCXXABI_HIDDEN
   #define _LIBCXXABI_DATA_VIS
   #define _LIBCXXABI_FUNC_VIS