Use GNUInstallDirs as archive and library dirs.

Author: kalashnik

CMakeLists.txt

@@ -31,6 +31,6 @@ endif(BUILD_MHOOK_TEST)
 include(GNUInstallDirs)
 
 install(TARGETS mhook
-    ARCHIVE DESTINATION "${INSTALL_LIB_DIR}"
-    LIBRARY DESTINATION "${INSTALL_LIB_DIR}")
+    ARCHIVE DESTINATION "${CMAKE_INSTALL_FULL_LIBDIR}"
+    LIBRARY DESTINATION "${CMAKE_INSTALL_FULL_LIBDIR}")
 install(FILES mhook-lib/mhook.h DESTINATION "${INSTALL_INC_DIR}/mhook-lib")