[CMake] find TinyXML with the submodule

CMakeLists.txt

@@ -52,7 +52,8 @@ SET(${PROJECT_NAME}_HEADERS
 # Add Boost path to include directories.
 INCLUDE_DIRECTORIES(${Boost_INCLUDE_DIRS})
 
-ADD_REQUIRED_DEPENDENCY("tinyxml >= 2.6")
+SET(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake/find-external/TinyXML)
+FIND_PACKAGE(TinyXML REQUIRED)
 
 ADD_SUBDIRECTORY(src)
 ADD_SUBDIRECTORY(tests)

src/CMakeLists.txt

@@ -49,6 +49,7 @@ SET_TARGET_PROPERTIES(hpp-util PROPERTIES SOVERSION ${PROJECT_VERSION})
 # Link against Boost libraries.
 TARGET_LINK_LIBRARIES(hpp-util ${Boost_LIBRARIES})
 
-PKG_CONFIG_USE_DEPENDENCY(hpp-util tinyxml)
+TARGET_INCLUDE_DIRECTORIES(hpp-util PRIVATE ${TinyXML_INCLUDE_DIR})
+TARGET_LINK_LIBRARIES(hpp-util ${TinyXML_LIBRARY})
 
 INSTALL(TARGETS hpp-util DESTINATION ${CMAKE_INSTALL_LIBDIR})