diff -up patch-2.7.6/.me.orig patch-2.7.6/.me
diff -up patch-2.7.6/src/common.h.orig patch-2.7.6/src/common.h
--- patch-2.7.6/src/common.h.orig	2018-06-18 17:20:49.661363500 +0200
+++ patch-2.7.6/src/common.h	2018-06-18 17:22:21.505841527 +0200
@@ -221,3 +221,11 @@ bool merge_hunk (int hunk, struct outsta
 #else
 # define merge_hunk(hunk, outstate, where, somefailed) false
 #endif
+
+#ifndef FALLTHROUGH
+# if __GNUC__ < 7
+#  define FALLTHROUGH ((void) 0)
+# else
+#  define FALLTHROUGH __attribute__ ((__fallthrough__))
+# endif
+#endif
diff -up patch-2.7.6/src/patch.c.orig patch-2.7.6/src/patch.c
--- patch-2.7.6/src/patch.c.orig	2018-06-18 17:20:49.662363506 +0200
+++ patch-2.7.6/src/patch.c	2018-06-18 17:22:21.507841538 +0200
@@ -1381,7 +1381,7 @@ abort_hunk_context (bool header, bool re
 	    break;
 	case ' ': case '-': case '+': case '!':
 	    fprintf (rejfp, "%c ", pch_char (i));
-	    /* fall into */
+	    FALLTHROUGH;
 	case '\n':
 	    pch_write_line (i, rejfp);
 	    break;
diff -up patch-2.7.6/src/pch.c.orig patch-2.7.6/src/pch.c
--- patch-2.7.6/src/pch.c.orig	2018-06-18 17:20:49.662363506 +0200
+++ patch-2.7.6/src/pch.c	2018-06-18 17:24:00.694357762 +0200
@@ -1742,7 +1742,7 @@ another_hunk (enum diff difftype, bool r
 		break;
 	    case '=':
 		ch = ' ';
-		/* FALL THROUGH */
+		FALLTHROUGH;
 	    case ' ':
 		if (fillsrc > p_ptrn_lines) {
 		    free(s);
@@ -1763,7 +1763,7 @@ another_hunk (enum diff difftype, bool r
 		    p_end = fillsrc-1;
 		    return -1;
 		}
-		/* FALL THROUGH */
+		FALLTHROUGH;
 	    case '+':
 		if (filldst > p_end) {
 		    free(s);
@@ -2401,7 +2401,7 @@ do_ed_script (char const *inname, char c
     size_t chars_read;
     FILE *tmpfp = 0;
     char const *tmpname;
-    int tmpfd;
+    int tmpfd = -1; /* placate gcc's -Wmaybe-uninitialized */
     pid_t pid;
 
     if (! dry_run && ! skip_rest_of_patch)