[PATCH] [libc++] Fix the CMake build on Mac when setting MACOSX_DEPLOYMENT_TARGET=10.6

[Hans Wennborg]

Hi samsonov,

The build file was trying to use LIBCXX_VERSION, which isn't set
anywhere, and also forgot to split the 'compile_flags' list.

http://reviews.llvm.org/D4860

Files:
  lib/CMakeLists.txt

Index: lib/CMakeLists.txt
===================================================================
--- lib/CMakeLists.txt
+++ lib/CMakeLists.txt
@@ -54,7 +54,7 @@
     list(APPEND compile_flags "-U__STRICT_ANSI__")
     list(APPEND link_flags
       "-compatibility_version 1"
-      "-current_version ${LIBCXX_VERSION}"
+      "-current_version 1"
       "-install_name /usr/lib/libc++.1.dylib"
       "-Wl,-reexport_library,/usr/lib/libc++abi.dylib"
       "-Wl,-unexported_symbols_list,${CMAKE_CURRENT_SOURCE_DIR}/libc++unexp.exp"
@@ -84,6 +84,7 @@
   endif()
 endif()
 
+string(REPLACE ";" " " compile_flags "${compile_flags}")
 string(REPLACE ";" " " link_flags "${link_flags}")
 
 set_target_properties(cxx
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