[CMake] Fix c++ abi library configuration on Linux.
You can now configure from the command line using:
-DLIBCXX_CXX_ABI=libsupc++
-DLIBCXX_LIBSUPCXX_INCLUDE_PATHS="path;path
Also documents how to build on Linux.
llvm-svn: 171316
diff --git a/libcxx/lib/CMakeLists.txt b/libcxx/lib/CMakeLists.txt
index e0f94ca..4ee1f4d 100644
--- a/libcxx/lib/CMakeLists.txt
+++ b/libcxx/lib/CMakeLists.txt
@@ -31,7 +31,9 @@
)
endif()
-add_dependencies(cxx ${LIBCXX_CXX_ABI_DEPS})
+if (DEFINED LIBCXX_CXX_ABI_DEPS)
+ add_dependencies(cxx ${LIBCXX_CXX_ABI_DEPS})
+endif()
# Generate library list.
set(libraries ${LIBCXX_CXX_ABI_LIBRARIES})
