https://github.com/brad0 updated 
https://github.com/llvm/llvm-project/pull/171754

>From 01085318abfec9d8d1828877b4ec1f9b14efb68b Mon Sep 17 00:00:00 2001
From: Brad Smith <[email protected]>
Date: Wed, 10 Dec 2025 21:27:21 -0500
Subject: [PATCH] [libunwind] fix building on Haiku i386 (#171586)
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Co-authored-by: Jérôme Duval <[email protected]>
(cherry picked from commit 3fdce799cc184bf1b7c60a6845026df6c6e7630b)
---
 libunwind/src/UnwindCursor.hpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/libunwind/src/UnwindCursor.hpp b/libunwind/src/UnwindCursor.hpp
index 9a1afd3721f5a..1dcf2e14da851 100644
--- a/libunwind/src/UnwindCursor.hpp
+++ b/libunwind/src/UnwindCursor.hpp
@@ -41,7 +41,8 @@
 #define _LIBUNWIND_CHECK_LINUX_SIGRETURN 1
 #endif
 
-#if defined(_LIBUNWIND_TARGET_HAIKU) && defined(_LIBUNWIND_TARGET_X86_64)
+#if defined(_LIBUNWIND_TARGET_HAIKU) &&                                        
\
+    (defined(_LIBUNWIND_TARGET_I386) || defined(_LIBUNWIND_TARGET_X86_64))
 #include <OS.h>
 #include <signal.h>
 #define _LIBUNWIND_CHECK_HAIKU_SIGRETURN 1
@@ -1345,7 +1346,7 @@ class UnwindCursor : public AbstractUnwindCursor{
   bool             _unwindInfoMissing;
   bool             _isSignalFrame;
 #if defined(_LIBUNWIND_CHECK_LINUX_SIGRETURN) ||                               
\
-    defined(_LIBUNWIND_TARGET_HAIKU)
+    defined(_LIBUNWIND_CHECK_HAIKU_SIGRETURN)
   bool             _isSigReturn = false;
 #endif
 };

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