fixes for -Wimplicit-fallthrough

src/common.h

@@ -49,6 +49,12 @@ typedef unsigned int uint;
 # define ATTR_PRINTFLIKE(fmt,var)
 #endif
 
+#if __GNUC__ >= 7
+# define FALLTHROUGH __attribute__((fallthrough));
+#else
+# define FALLTHROUGH
+#endif
+
 #ifdef __GNUC__
 # define INLINE __inline__
 #else

src/compat/isync.h

@@ -34,6 +34,12 @@
 # define ATTR_PRINTFLIKE(fmt,var)
 #endif
 
+#if __GNUC__ >= 7
+# define FALLTHROUGH __attribute__((fallthrough));
+#else
+# define FALLTHROUGH
+#endif
+
 typedef struct config {
 	struct config *next;
 

src/compat/main.c

@@ -64,14 +64,14 @@ struct option Opts[] = {
 };
 #endif
 
-static void
+static void ATTR_NORETURN
 version( void )
 {
 	puts( PACKAGE " " VERSION );
 	exit( 0 );
 }
 
-static void
+static void ATTR_NORETURN
 usage( int code )
 {
 	fputs(
@@ -194,13 +194,13 @@ main( int argc, char **argv )
 		switch (i) {
 		case 'W':
 			outconfig = optarg;
-			/* plopp */
+			FALLTHROUGH
 		case 'w':
 			writeout = 1;
 			break;
 		case 'l':
 			list = 1;
-			/* plopp */
+			FALLTHROUGH
 		case 'a':
 			all = 1;
 			break;

src/main.c

@@ -51,14 +51,14 @@ int new_total[2], new_done[2];
 int flags_total[2], flags_done[2];
 int trash_total[2], trash_done[2];
 
-static void
+static void ATTR_NORETURN
 version( void )
 {
 	puts( PACKAGE " " VERSION );
 	exit( 0 );
 }
 
-static void
+static void ATTR_NORETURN
 usage( int code )
 {
 	fputs(
@@ -573,7 +573,7 @@ main( int argc, char **argv )
 			goto cop;
 		case 'F':
 			cops |= XOP_PULL|XOP_PUSH;
-			/* fallthrough */
+			FALLTHROUGH
 		case '0':
 			ops[M] |= XOP_HAVE_TYPE;
 			break;

src/socket.c

@@ -72,7 +72,7 @@ ssl_return( const char *func, conn_t *conn, int ret )
 		return ret;
 	case SSL_ERROR_WANT_WRITE:
 		conf_notifier( &conn->notify, POLLIN, POLLOUT );
-		/* fallthrough */
+		FALLTHROUGH
 	case SSL_ERROR_WANT_READ:
 		return 0;
 	case SSL_ERROR_SYSCALL: