include dirs for benchmark

CMakeLists.txt

@@ -1,6 +1,8 @@
 cmake_minimum_required(VERSION 3.0.2)
 project(mstch)
-option (WITH_UNIT_TESTS "enable building unit test executable" OFF)
+
+option(WITH_UNIT_TESTS "enable building unit test executable" OFF)
+option(WITH_BENCHMARK "enable building benchmark executable" OFF)
 
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 set(CMAKE_INCLUDE_CURRENT_DIR_IN_INTERFACE ON)
@@ -16,15 +18,10 @@ add_subdirectory(src)
 
 if(WITH_UNIT_TESTS)
   enable_testing()
-  include_directories(
-      vendor/Catch/single_include
-      vendor/json.hpp/include)
   add_subdirectory(test)
 endif()
 
 if(WITH_BENCHMARK)
-  include_directories(
-      vendor/benchmark/include)
   add_subdirectory(vendor/benchmark)
   add_subdirectory(benchmark)
 endif()

benchmark/CMakeLists.txt

@@ -1,2 +1,6 @@
+include_directories(
+  ${CMAKE_SOURCE_DIR}/include
+  ${CMAKE_SOURCE_DIR}/vendor/benchmark/include)
+
 add_executable(mstch_benchmark benchmark_main.cpp)
 target_link_libraries(mstch_benchmark mstch benchmark)

test/CMakeLists.txt

@@ -2,6 +2,8 @@ find_package(Boost 1.54 COMPONENTS program_options REQUIRED)
 
 include_directories(
   ${CMAKE_SOURCE_DIR}/include
+  ${CMAKE_SOURCE_DIR}/vendor/Catch/single_include
+  ${CMAKE_SOURCE_DIR}/vendor/json.hpp/include
   ${Boost_INCLUDE_DIR})
 
 add_executable(headerize headerize.cpp)