From a66a7b30ce3624a849867ad39ac62fb8944eb141 Mon Sep 17 00:00:00 2001
From: Evgeniy Stepanov <eugeni.stepanov@gmail.com>
Date: Tue, 13 Oct 2015 23:48:28 +0000
Subject: ABI versioning macros for libc++.

C++ macros and CMake options that specify the default ABI version of
the library, and can be overridden to pick up new ABI-changing
features.

llvm-svn: 250254
---
 libcxx/cmake/Modules/HandleLibcxxFlags.cmake | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'libcxx/cmake')

diff --git a/libcxx/cmake/Modules/HandleLibcxxFlags.cmake b/libcxx/cmake/Modules/HandleLibcxxFlags.cmake
index a9e43eaece9..320650513b6 100644
--- a/libcxx/cmake/Modules/HandleLibcxxFlags.cmake
+++ b/libcxx/cmake/Modules/HandleLibcxxFlags.cmake
@@ -65,6 +65,12 @@ macro(config_define_if_not condition def)
   endif()
 endmacro()
 
+macro(config_define value def)
+  set(${def} ${value})
+  add_definitions(-D${def}=${value})
+  set(LIBCXX_NEEDS_SITE_CONFIG ON)
+endmacro()
+
 # Add a specified list of flags to both 'LIBCXX_COMPILE_FLAGS' and
 # 'LIBCXX_LINK_FLAGS'.
 macro(add_flags)
-- 
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