[Kernel] Add more setting checking for RT_USING_POSIX.

include/rtdebug.h

@@ -28,6 +28,15 @@
 #if !defined(RT_USING_DFS) || !defined(RT_USING_DFS_DEVFS)
 #error "POSIX poll/select, stdin need file system(RT_USING_DFS) and device file system(RT_USING_DFS_DEVFS)"
 #endif
+
+#if defined(RT_USING_LWIP) && !defined(RT_USING_DFS_NET)
+#error "POSIX poll/select, stdin need file BSD socket API(RT_USING_DFS_NET)"
+#endif
+
+#if !defined(RT_USING_LIBC)
+#error "POSIX layer need standard C library(RT_USING_LIBC)"
+#endif
+
 #endif
 
 #ifdef RT_USING_POSIX_TERMIOS