[libunwind] [libunwind] fix building on Haiku i386 (PR #171586)

[Brad Smith via cfe-commits]

https://github.com/brad0 created https://github.com/llvm/llvm-project/pull/171586

None

>From fc4191b49688dc53fa9a59b3d98284c927da4567 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Duval?= <jerome.duval at gmail.com>
Date: Wed, 10 Dec 2025 04:10:15 -0500
Subject: [PATCH] [libunwind] fix building on Haiku i386

---
 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 33fcd841b2ab0..afa0cae790377 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
@@ -1366,7 +1367,7 @@ 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
 #ifdef _LIBUNWIND_TRACE_RET_INJECT