Fixed includedir for the .pc.cmake file

CMakeLists.txt

@@ -209,7 +209,9 @@ else()
 	set(_library_dir lib)
 endif()
 
-set(INCLUDE_INSTALL_DIR include/yaml-cpp)
+set(INCLUDE_INSTALL_ROOT_DIR include)
+
+set(INCLUDE_INSTALL_DIR ${INCLUDE_INSTALL_ROOT_DIR}/yaml-cpp)
 set(LIB_INSTALL_DIR "${_library_dir}${LIB_SUFFIX}")
 
 set(_INSTALL_DESTINATIONS

yaml-cpp.pc.cmake

 prefix=@CMAKE_INSTALL_PREFIX@
 exec_prefix=@CMAKE_INSTALL_PREFIX@
 libdir=${prefix}/@LIB_INSTALL_DIR@
-includedir=${prefix}/@INCLUDE_INSTALL_DIR@
+includedir=${prefix}/@INCLUDE_INSTALL_ROOT_DIR@
 
 Name: Yaml-cpp
 Description: A YAML parser and emitter for C++