Merge pull request open-source-parsers#94 from Gachapen/cmake_target_include

CMake: Add include directory to jsoncpp_lib target

Well-researched. Passes Travis CI.

Author: cdunn2001

src/lib_json/CMakeLists.txt

@@ -43,6 +43,12 @@ ADD_LIBRARY( jsoncpp_lib ${JSONCPP_LIB_TYPE}
 SET_TARGET_PROPERTIES( jsoncpp_lib PROPERTIES OUTPUT_NAME jsoncpp )
 SET_TARGET_PROPERTIES( jsoncpp_lib PROPERTIES VERSION ${JSONCPP_VERSION} SOVERSION ${JSONCPP_VERSION_MAJOR} )
 
+IF(CMAKE_VERSION VERSION_EQUAL 2.8.11 OR CMAKE_VERSION VERSION_GREATER 2.8.11)
+    TARGET_INCLUDE_DIRECTORIES( jsoncpp_lib
+                                PUBLIC ${JSONCPP_INCLUDE_DIR}
+                                )
+ENDIF(CMAKE_VERSION VERSION_EQUAL 2.8.11 OR CMAKE_VERSION VERSION_GREATER 2.8.11)
+
 # Install instructions for this target
 IF(JSONCPP_WITH_CMAKE_PACKAGE)
     TARGET_INCLUDE_DIRECTORIES( jsoncpp_lib