From f23545d9d38b8102ec739e4deab6cd8f55fe495b Mon Sep 17 00:00:00 2001
From: Zach van Rijn <me@zv.io>
Date: Tue, 20 Dec 2022 12:06:10 -0600
Subject: scripts/tsort.c: clean up some non-portable code.

Many variants of this utility are floating around; there does not
appear to be a canonical implementation. This one works for us.

  * removed non-portable '#include <sys/cdefs.h>';
  * replaced legacy 'bcopy' with 'memmove' as recommended

The code is still C99 but could be ported to C89 trivially.
---
 scripts/tsort.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'scripts')

diff --git a/scripts/tsort.c b/scripts/tsort.c
index e307268da..51aba6a31 100644
--- a/scripts/tsort.c
+++ b/scripts/tsort.c
@@ -42,8 +42,6 @@ static const char copyright[] =
 static const char sccsid[] = "@(#)tsort.c	8.3 (Berkeley) 5/4/95";
 #endif /* not lint */
 
-#include <sys/cdefs.h>
-
 #include <sys/types.h>
 
 #include <ctype.h>
@@ -55,6 +53,9 @@ static const char sccsid[] = "@(#)tsort.c	8.3 (Berkeley) 5/4/95";
 #include <string.h>
 #include <unistd.h>
 
+/* https://pubs.opengroup.org/onlinepubs/007904875/functions/bcopy.html */
+#define bcopy(b1,b2,len) (memmove((b2), (b1), (len)), (void) 0)
+
 /*
  *  Topological sort.  Input is a list of pairs of strings separated by
  *  white space (spaces, tabs, and/or newlines); strings are written to
-- 
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