Add variable for install dirs

CMakeLists.txt

@@ -33,17 +33,21 @@ file(GLOB_RECURSE MCPP_SOURCE_FILES ${MCPP_SRC_DIR}/*.cpp)
 # Library build
 add_library(${PROJECT_NAME} SHARED ${MCPP_INCLUDE_FILES} ${MCPP_SOURCE_FILES})
 
+
+set(LIB_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/lib/${PROJECT_NAME})
+set(HEADER_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/include/${PROJECT_NAME})
+
 set_target_properties(${PROJECT_NAME}
     PROPERTIES
     VERSION ${PROJECT_VERSION}
     SOVERSION 1
     PUBLIC_HEADER "${MCPP_INCLUDE_FILES}"
-    INSTALL_NAME_DIR "${CMAKE_INSTALL_PREFIX}/lib"
+    INSTALL_NAME_DIR ${LIB_INSTALL_DIR}
 )
 
 install(TARGETS ${PROJECT_NAME}
-    LIBRARY DESTINATION lib
-    PUBLIC_HEADER DESTINATION include/${PROJECT_NAME}
+    LIBRARY DESTINATION ${LIB_INSTALL_DIR}
+    PUBLIC_HEADER DESTINATION ${HEADER_INSTALL_DIR}
 )
 
 # CPack setup