[libcxxabi] Add "install-libcxxabi" target.

Summary:
Currently you can't install libc++abi from within the LLVM tree without installing all of LLVM. This patch adds an install rule for libc++abi.


Reviewers: danalbert, compnerd, rengolin, beanz

Subscribers: martell, beanz, jroelofs, cfe-commits

Differential Revision: http://reviews.llvm.org/D11682

llvm-svn: 245461

libcxxabi/src/CMakeLists.txt

@@ -119,6 +119,14 @@ endif()
 add_custom_target(cxxabi DEPENDS ${LIBCXXABI_TARGETS})
 
 install(TARGETS ${LIBCXXABI_TARGETS}
-  LIBRARY DESTINATION lib${LIBCXXABI_LIBDIR_SUFFIX}
-  ARCHIVE DESTINATION lib${LIBCXXABI_LIBDIR_SUFFIX}
+  LIBRARY DESTINATION lib${LIBCXXABI_LIBDIR_SUFFIX} COMPONENT libcxxabi
+  ARCHIVE DESTINATION lib${LIBCXXABI_LIBDIR_SUFFIX} COMPONENT libcxxabi
   )
+
+if (NOT CMAKE_CONFIGURATION_TYPES)
+  add_custom_target(install-libcxxabi
+    DEPENDS cxxabi
+    COMMAND "${CMAKE_COMMAND}"
+            -DCMAKE_INSTALL_COMPONENT=libcxxabi
+            -P "${LIBCXXABI_BINARY_DIR}/cmake_install.cmake")
+endif()