use cmake lib dir instead of hardcoded name

src/libs/services/auth/CMakeLists.txt

@@ -35,5 +35,5 @@ if (USE_PAM)
 	target_link_libraries(lmsauth PRIVATE ${PAM_LIBRARIES})
 endif (USE_PAM)
 
-install(TARGETS lmsauth DESTINATION lib)
+install(TARGETS lmsauth DESTINATION ${CMAKE_INSTALL_LIBDIR})
 

src/libs/services/cover/CMakeLists.txt

@@ -24,5 +24,5 @@ target_link_libraries(lmsservice-cover PUBLIC
 	std::filesystem
 	)
 
-install(TARGETS lmsservice-cover DESTINATION lib)
+install(TARGETS lmsservice-cover DESTINATION ${CMAKE_INSTALL_LIBDIR})
 

src/libs/services/feedback/CMakeLists.txt

@@ -26,4 +26,4 @@ target_link_libraries(lmsfeedback PUBLIC
 	lmsdatabase
 	)
 
-install(TARGETS lmsfeedback DESTINATION lib)
+install(TARGETS lmsfeedback DESTINATION ${CMAKE_INSTALL_LIBDIR})

src/libs/services/recommendation/CMakeLists.txt

@@ -26,5 +26,5 @@ target_link_libraries(lmsrecommendation PRIVATE
 	std::filesystem
 	)
 
-install(TARGETS lmsrecommendation DESTINATION lib)
+install(TARGETS lmsrecommendation DESTINATION ${CMAKE_INSTALL_LIBDIR})
 

src/libs/services/scanner/CMakeLists.txt

@@ -29,5 +29,5 @@ target_link_libraries(lmsscanner PUBLIC
 	Wt::Wt
 	)
 
-install(TARGETS lmsscanner DESTINATION lib)
+install(TARGETS lmsscanner DESTINATION ${CMAKE_INSTALL_LIBDIR})
 

src/libs/services/scrobbling/CMakeLists.txt

@@ -26,7 +26,7 @@ target_link_libraries(lmsscrobbling PUBLIC
 	lmsdatabase
 	)
 
-install(TARGETS lmsscrobbling DESTINATION lib)
+install(TARGETS lmsscrobbling DESTINATION ${CMAKE_INSTALL_LIBDIR})
 
 if(BUILD_TESTING)
 	add_subdirectory(test)