From f86e5abb85c1a4a5f9755ab5660aad9c4aa833ee Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Wed, 10 Sep 2025 10:17:59 +0200
Subject: [PATCH] Cmake libxml compatibility

---
 cmake/CMakeLists.txt | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index 397d5ca4ea..9fa99a67cb 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -442,7 +442,14 @@ if(NOT MINIMAL_BUILD)
     clear_wasm_sysroot()
     if(IFCXML_SUPPORT)
         if((NOT LIBXML2_INCLUDE_DIR AND NOT LIBXML2_LIBRARIES))
-            find_package(LibXml2 CONFIG REQUIRED)
+            # First try config mode (probably works with vcpkg, Conan, macOS brew installs, but not on ubuntu 22.04?)
+            find_package(LibXml2 QUIET CONFIG)
+
+            if(NOT LibXml2_FOUND)
+                # Fallback to CMake's builtin FindLibXml2 module (works on Ubuntu)
+                find_package(LibXml2 REQUIRED)
+            endif()
+
             message(STATUS "Found LibXml2 config: ${LibXml2_DIR}")
             get_target_property(LIBXML2_INCLUDE_DIR LibXml2::LibXml2 INTERFACE_INCLUDE_DIRECTORIES)
             get_target_property(_libxml2_debug LibXml2::LibXml2 IMPORTED_LOCATION_DEBUG)