From 08ca4fbc7aa829afe93b77b9e5e7e07450a5724c Mon Sep 17 00:00:00 2001
From: Xuntao Chi <chotaotao1qaz2wsx@gmail.com>
Date: Sat, 22 Feb 2025 20:58:28 +0800
Subject: WINDOWS_EXPORT_ALL_SYMBOLS: Distinguish bigobj from cl -GL objects

The MSVC `/GL` flag generates an object of type `ANON_OBJECT_V1`.
`bigobj` has version >= 2.

Fixes: #25798
---
 Source/bindexplib.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Source/bindexplib.cxx b/Source/bindexplib.cxx
index b58a1c4..03122ce 100644
--- a/Source/bindexplib.cxx
+++ b/Source/bindexplib.cxx
@@ -469,7 +469,7 @@ static bool DumpFile(std::string const& nmPath, char const* filename,
       // check for /bigobj and llvm LTO format
       cmANON_OBJECT_HEADER_BIGOBJ* h =
         (cmANON_OBJECT_HEADER_BIGOBJ*)lpFileBase;
-      if (h->Sig1 == 0x0 && h->Sig2 == 0xffff) {
+      if (h->Sig1 == 0x0 && h->Sig2 == 0xffff && h->Version >= 2) {
         // bigobj
         DumpSymbols<cmANON_OBJECT_HEADER_BIGOBJ, cmIMAGE_SYMBOL_EX>
           symbolDumper(
-- 
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