From cfce7852d52c48177275f9f666026827fff5119e Mon Sep 17 00:00:00 2001
From: David Carlier <devnexen@gmail.com>
Date: Sun, 2 Aug 2026 19:21:19 +0100
Subject: [PATCH] Autotools: main/io missing from the out-of-source build
 directories.

Fix #22989

The directory was never registered with PHP_ADD_BUILD_DIR(), so
out-of-source builds failed opening main/io/*.dep.
---
 configure.ac | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configure.ac b/configure.ac
index ec64637b186b..3229e0dac040 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1834,6 +1834,7 @@ AC_DEFINE([HAVE_BUILD_DEFS_H], [1],
 
 PHP_ADD_BUILD_DIR([
   main
+  main/io
   main/poll
   main/streams
   scripts