From 01e5ffc85cd4357fd7b5b7ceefa29f2d10ca26b7 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max.kellermann@ionos.com>
Date: Wed, 4 Jan 2023 16:36:26 +0100
Subject: [PATCH] UPGRADING.INTERNALS: mention the header cleanups

---
 UPGRADING.INTERNALS | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/UPGRADING.INTERNALS b/UPGRADING.INTERNALS
index d6911af58db..770300a350c 100644
--- a/UPGRADING.INTERNALS
+++ b/UPGRADING.INTERNALS
@@ -20,6 +20,12 @@ PHP 8.3 INTERNALS UPGRADE NOTES
   EG(stack_base).
 * EG(opline_before_exception) may now be null if the VM throws an exception
   before executing any opline.
+* Many C header files have been cleaned up and include dependencies
+  have been reduced.  Many headers which used to be always included by
+  Zend headers (e.g. "errno.h") are no longer implied, and this may
+  break the build of third-party extensions which relied on this
+  implementation detail.  Those extensions may need to add the missing
+  #include lines.
 
 ========================
 2. Build system changes