[Lldb-commits] [lldb] [lldb] Add build option to specify the libxml 2 version (PR #142183)

[Fabrice de Gans via lldb-commits]

https://github.com/Steelskin created https://github.com/llvm/llvm-project/pull/142183

The Swift Windows toolchain uses its own static build of libxml 2, which is more recent than 2.8, resulting in the provided libxml 2 to be rejected. This change allows to specify a custom version for libxml 2, while defaulting to 2.8.

>From c517ba1aa6c17de47c125468c047366117a9989a Mon Sep 17 00:00:00 2001
From: Fabrice de Gans <fabrice at thebrowser.company>
Date: Fri, 30 May 2025 09:27:54 -0700
Subject: [PATCH] [lldb] Add build option to specify the libxml 2 version

The Swift Windows toolchain uses its own static build of libxml 2, which
is more recent than 2.8, resulting in the provided libxml 2 to be
rejected. This change allows to specify a custom version for libxml 2,
while defaulting to 2.8.
---
 lldb/cmake/modules/LLDBConfig.cmake | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lldb/cmake/modules/LLDBConfig.cmake b/lldb/cmake/modules/LLDBConfig.cmake
index cfd626c9358a1..f25ad1333468c 100644
--- a/lldb/cmake/modules/LLDBConfig.cmake
+++ b/lldb/cmake/modules/LLDBConfig.cmake
@@ -51,13 +51,15 @@ macro(add_optional_dependency variable description package found)
   message(STATUS "${description}: ${${variable}}")
 endmacro()
 
+option(LLDB_LIBXML2_VERSION "Sepcify the version of libxml 2 to use with LLDB" "2.8")
+
 add_optional_dependency(LLDB_ENABLE_SWIG "Enable SWIG to generate LLDB bindings" SWIG SWIG_FOUND VERSION 4)
 add_optional_dependency(LLDB_ENABLE_LIBEDIT "Enable editline support in LLDB" LibEdit LibEdit_FOUND)
 add_optional_dependency(LLDB_ENABLE_CURSES "Enable curses support in LLDB" CursesAndPanel CURSESANDPANEL_FOUND)
 add_optional_dependency(LLDB_ENABLE_LZMA "Enable LZMA compression support in LLDB" LibLZMA LIBLZMA_FOUND)
 add_optional_dependency(LLDB_ENABLE_LUA "Enable Lua scripting support in LLDB" LuaAndSwig LUAANDSWIG_FOUND)
 add_optional_dependency(LLDB_ENABLE_PYTHON "Enable Python scripting support in LLDB" PythonAndSwig PYTHONANDSWIG_FOUND)
-add_optional_dependency(LLDB_ENABLE_LIBXML2 "Enable Libxml 2 support in LLDB" LibXml2 LIBXML2_FOUND VERSION 2.8)
+add_optional_dependency(LLDB_ENABLE_LIBXML2 "Enable Libxml 2 support in LLDB" LibXml2 LIBXML2_FOUND VERSION ${LLDB_LIBXML2_VERSION})
 add_optional_dependency(LLDB_ENABLE_FBSDVMCORE "Enable libfbsdvmcore support in LLDB" FBSDVMCore FBSDVMCore_FOUND QUIET)
 
 option(LLDB_USE_ENTITLEMENTS "When codesigning, use entitlements if available" ON)