Refactor CMake listfile to define an interface imported library

CMakeLists.txt

@@ -2,24 +2,17 @@ cmake_minimum_required(VERSION 2.8)
 
 project(json CXX)
 
-add_executable(json_unit
-    src/json.hpp test/catch.hpp test/unit.cpp
-)
+add_library(${PROJECT_NAME} INTERFACE IMPORTED GLOBAL)
+set_target_properties(${PROJECT_NAME} PROPERTIES
+    INTERFACE_INCLUDE_DIRECTORIES "${CMAKE_CURRENT_SOURCE_DIR}/src")
 
-if(MSVC)
-    set(CMAKE_CXX_FLAGS
-        "/EHsc"
-    )
-
-    STRING(REPLACE "/O2" "/Od" CMAKE_CXX_FLAGS_RELEASE ${CMAKE_CXX_FLAGS_RELEASE})
-
-    add_definitions(-D_SCL_SECURE_NO_WARNINGS)
-else(MSVC)
-    set(CMAKE_CXX_FLAGS
-        "-std=c++11"
-    )
-endif(MSVC)
-
-include_directories(
-    src test
-)
+set(UNIT_TEST_NAME "json_unit")
+add_executable(${UNIT_TEST_NAME}
+    "test/catch.hpp" "test/unit.cpp")
+set_target_properties(${UNIT_TEST_NAME} PROPERTIES
+    CXX_STANDARD 11
+    CXX_STANDARD_REQUIRED ON
+    COMPILE_DEFINITIONS "$<$<CXX_COMPILER_ID:MSVC>:_SCL_SECURE_NO_WARNINGS>"
+    COMPILE_OPTIONS "$<$<CXX_COMPILER_ID:MSVC>:/EHsc;$<$<CONFIG:Release>:/Od>>")
+target_include_directories(${UNIT_TEST_NAME} PRIVATE "test")
+target_link_libraries(${UNIT_TEST_NAME} ${PROJECT_NAME})