From 5597a275c2b60610090b40dd64ff5904dd393f41 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A1draig=20Brady?= <P@draigBrady.com>
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  */