webOS: fix aarch64 compile

CMakeLists.txt

@@ -226,10 +226,12 @@ if(USE_SYSTEM_RAPIDJSON)
 endif()
 
 if(WEBOS)
-	set(ARMV7 ON)
 	set(USING_X11_VULKAN OFF)
 	set(USING_GLES2 ON)
 	set(USE_SYSTEM_ZSTD OFF)
+	if(CMAKE_CXX_COMPILER MATCHES "arm")
+        set(ARMV7 ON)
+	endif()
 endif()
 
 if(UNIX AND NOT (APPLE OR ANDROID) AND VULKAN)
@@ -1039,7 +1041,7 @@ if(USE_FFMPEG)
 					set(PLATFORM_ARCH "Windows/x86")
 				endif()
 			endif()
-			if(WEBOS)
+			if(WEBOS AND ARMV7)
 				set(PLATFORM_ARCH "linux/webos")
 			endif()
 			if(PLATFORM_ARCH)