From 3d1fdddf92321b516d55651888b9c669e254634e Mon Sep 17 00:00:00 2001
From: Jia Tan <jiat0218@gmail.com>
Date: Tue, 27 Jun 2023 17:27:09 +0300
Subject: [PATCH] Docs: Document the configure option --disable-ifunc in
 INSTALL.

---
 INSTALL | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/INSTALL b/INSTALL
index 7fb41fa6..b64c56c5 100644
--- a/INSTALL
+++ b/INSTALL
@@ -380,6 +380,14 @@ XZ Utils Installation
                 required extensions (-msse4.1 -mpclmul) then runtime
                 detection isn't used and the generic code is omitted.
 
+    --disable-ifunc
+                Disable the use of __attribute__((__ifunc__())) for
+                function dispatching even if support is detected.
+
+                The ifunc attribute is incompatible with
+                -fsanitize=address so it may need to be disabled in
+                debug builds with extra instrumentation.
+
     --enable-unaligned-access
                 Allow liblzma to use unaligned memory access for 16-bit,
                 32-bit, and 64-bit loads and stores. This should be