From 702411fc298032a2e700907cc3d6136d5b46afe7 Mon Sep 17 00:00:00 2001
From: Louis Dionne <ldionne@apple.com>
Date: Thu, 14 Mar 2019 17:15:47 +0000
Subject: [PATCH] [libc++][CMake] Do not define `cxx_shared_EXPORTS` when
 building the shared library

CMake will define -Dcxx_shared_EXPORTS when building the shared library
by default. In theory, this is used to signal to the library that we're
building a shared library and that dllimport/dllexport should be used.
However, we already have our own way of doing that, so I'm removing this
define to avoid meaningless command line arguments in the build.

llvm-svn: 356167
---
 libcxx/lib/CMakeLists.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libcxx/lib/CMakeLists.txt b/libcxx/lib/CMakeLists.txt
index 91924f4..fd493d4 100644
--- a/libcxx/lib/CMakeLists.txt
+++ b/libcxx/lib/CMakeLists.txt
@@ -207,6 +207,7 @@ if (LIBCXX_ENABLE_SHARED)
       OUTPUT_NAME   "c++"
       VERSION       "${LIBCXX_ABI_VERSION}.0"
       SOVERSION     "${LIBCXX_ABI_VERSION}"
+      DEFINE_SYMBOL ""
   )
   cxx_set_common_defines(cxx_shared)
 
-- 
2.7.4