On 16/04/2026 17:10, Bruno Haible wrote:
On AIX 7.3 (machine: cfarm119.cfarm.net, compiler: gcc,
configure options: --with-openssl=no), the build fails due to a
compilation error:
CC src/yes.o
../src/yes.c: In function 'splice_write':
../src/yes.c:150:62: error: 'SPLICE_F_GIFT' undeclared (first use in this
function)
150 | unsigned int flags = iov.iov_len % page_size ? 0 :
SPLICE_F_GIFT;
|
^~~~~~~~~~~~~
../src/yes.c:150:62: note: each undeclared identifier is reported only once for
each function it appears in
../src/yes.c:151:23: warning: implicit declaration of function 'vmsplice'
[-Wimplicit-function-declaration]
151 | ssize_t n = vmsplice (vmsplice_fd, &iov, 1, flags);
| ^~~~~~~~
../src/yes.c:166:27: warning: implicit declaration of function 'splice'
[-Wimplicit-function-declaration]
166 | ssize_t s = splice (pipefd[0], NULL, STDOUT_FILENO, NULL,
| ^~~~~~
../src/yes.c:167:46: error: 'SPLICE_F_MOVE' undeclared (first use in this
function)
167 | remaining, SPLICE_F_MOVE);
| ^~~~~~~~~~~~~
gmake[2]: *** [Makefile:13598: src/yes.o] Error 1
I guess the configuration needs to be tweaked. It found:
checking for splice... yes
and thus defined
$ grep -i splice config.status
D["HAVE_SPLICE"]=" 1"
Indeed, splice() is a separate TCP thing on AIX:
#include <sys/types.h> #include <sys/socket.h>
int splice(socket1, socket2, flags)
The attached allows the build to complete on cfarm119.
cheers,
Padraig
From 5597a275c2b60610090b40dd64ff5904dd393f41 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A1draig=20Brady?= <[email protected]>
Date: Thu, 16 Apr 2026 22:02:03 +0100
Subject: [PATCH] build: fix build failure on AIX
* m4/jm-macros.m4: AIX has a splice() function for TCP,
so check for vmsplice() instead.
* src/splice.h: Define HAVE_SPLICE if vmsplice available.
Reported by Bruno Haible.
---
m4/jm-macros.m4 | 2 +-
src/splice.h | 7 ++++++-
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/m4/jm-macros.m4 b/m4/jm-macros.m4
index fbf082703..fb00f9faf 100644
--- a/m4/jm-macros.m4
+++ b/m4/jm-macros.m4
@@ -70,7 +70,7 @@ AC_DEFUN([coreutils_MACROS],
setgroups
sethostname
siginterrupt
- splice
+ vmsplice
sync
sysinfo
tcgetpgrp
diff --git a/src/splice.h b/src/splice.h
index 1fb55054d..c146563f7 100644
--- a/src/splice.h
+++ b/src/splice.h
@@ -17,7 +17,12 @@
#ifndef SPLICE_H
# define SPLICE_H 1
-# if HAVE_SPLICE
+# if HAVE_VMSPLICE
+
+/* splice() and vmsplice() were introduced at the same time,
+ so assume splice() is available. Note AIX also has a different
+ splice() which is why we don't explicitly check for that function. */
+# define HAVE_SPLICE 1
/* Empirically determined pipe size for best throughput.
Needs to be <= /proc/sys/fs/pipe-max-size */
--
2.53.0
