Do not run add_compile_options when libclangmm is a sub-project

CMakeLists.txt

@@ -2,8 +2,6 @@ cmake_minimum_required(VERSION 2.8)
 
 project(clangmm)
 
-add_compile_options(-std=c++11 -Wall -Wextra)
-
 if(APPLE)
   set(CMAKE_MACOSX_RPATH 1)
 endif()
@@ -15,14 +13,15 @@ endif()
 list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake_modules")
 find_package(LibClang REQUIRED)
 
-add_subdirectory(src)
-
 option(BUILD_TESTING OFF)
 
 if(${NOT_SUB_PROJECT})
+  add_compile_options(-std=c++11 -Wall -Wextra)
   set(BUILD_TESTING ON)
 endif()
 
+add_subdirectory(src)
+
 if(BUILD_TESTING)
   enable_testing()
   add_subdirectory(tests)

src/CMakeLists.txt

@@ -15,7 +15,6 @@ add_library(clangmm
   utility.cpp
 )
 
-include_directories(${LIBCLANG_INCLUDE_DIRS})
 target_link_libraries(clangmm ${LIBCLANG_LIBRARIES})
 target_include_directories(clangmm PUBLIC ${LIBCLANG_INCLUDE_DIRS} .)