socket: fix compiler warning

Don't define check_socket_flag() if no supported socket flag is defined.

diff --git a/socket.c b/socket.c
index ecaadaaa0bb284c0368c535dc6f108cc3fd67942..e285a5fed16e35dd8879c977622c4974ffc8109a 100644 (file)
--- a/socket.c
+++ b/socket.c
@@ -143,6 +143,7 @@ domain_to_string(int domain)
 
 /* ================================================== */
 
+#if defined(SOCK_CLOEXEC) || defined(SOCK_NONBLOCK)
 static int
 check_socket_flag(int sock_flag, int fd_flag, int fs_flag)
 {
@@ -163,6 +164,7 @@ check_socket_flag(int sock_flag, int fd_flag, int fs_flag)
 
   return 1;
 }
+#endif
 
 /* ================================================== */