Automatically detect export lists for OS X.
Summary:
Libc++ reexports symbols from the system libc++abi using -reexport_symbols_list. This can cause a linker failure if the list contains symbols not defined in the system libc++abi.
This patch attempts to detect the OS X version and use it to determine the correct symbol list.
It's my understanding that `lib/libc++abi2.exp` should be used on 10.9 and greater. Otherwise 'lib/libc++abi.exp' should be used
This fixes PR25666 (https://llvm.org/bugs/show_bug.cgi?id=25666)
Reviewers: mclow.lists, bcraig, dexonsmith, EricWF
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D20772
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@272723 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 05127bd..1c575cc 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -88,7 +88,21 @@
if ( APPLE AND (LIBCXX_CXX_ABI_LIBNAME STREQUAL "libcxxabi" OR
LIBCXX_CXX_ABI_LIBNAME STREQUAL "none"))
if (NOT DEFINED LIBCXX_LIBCPPABI_VERSION)
- set(LIBCXX_LIBCPPABI_VERSION "2")
+ set(LIBCXX_LIBCPPABI_VERSION "2") # Default value
+ execute_process(
+ COMMAND xcrun --show-sdk-version
+ OUTPUT_VARIABLE sdk_ver
+ RESULT_VARIABLE res
+ OUTPUT_STRIP_TRAILING_WHITESPACE)
+ if (res EQUAL 0)
+ message(STATUS "Found SDK version ${sdk_ver}")
+ string(REPLACE "10." "" sdk_ver "${sdk_ver}")
+ if (sdk_ver LESS 9)
+ set(LIBCXX_LIBCPPABI_VERSION "")
+ else()
+ set(LIBCXX_LIBCPPABI_VERSION "2")
+ endif()
+ endif()
endif()
if ( CMAKE_OSX_DEPLOYMENT_TARGET STREQUAL "10.6" )