Minor improvement CMakeLists to use generators

cmake/utils.cmake

@@ -25,12 +25,10 @@ endfunction()
 
 # Turn on warnings on the given target
 function(spdlog_enable_warnings target_name)
-	if (CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang|AppleClang")
+    target_compile_options(${target_name} PRIVATE
-		target_compile_options(${target_name} PRIVATE -Wall -Wextra -Wconversion -pedantic -Wfatal-errors)
+        $<$<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>,$<CXX_COMPILER_ID:GNU>>:
-	endif()
+            -Wall -Wextra -Wconversion -pedantic -Wfatal-errors>
-	if (CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
+        $<$<CXX_COMPILER_ID:MSVC>:/W4 /WX>)
-		target_compile_options(${target_name} PRIVATE /W4 /WX )
-	endif()
 endfunction()