- Use bundled glm from libs/glm when WITH_GLM=bundled
- Avoids FetchContent for glm since we provide it via GH_TUPLE for compatibility

--- sproton/CMakeLists.txt.orig	2024-11-06 08:14:52 UTC
+++ sproton/CMakeLists.txt
@@ -48,6 +48,12 @@ if(NOT WITH_GLM STREQUAL "bundled")
     find_package(glm ${glm_find_args})
 endif()
 
+# Check if glm is already provided in libs/glm (via ports GH_TUPLE)
+if(NOT glm_FOUND AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/libs/glm/CMakeLists.txt")
+    add_subdirectory(libs/glm EXCLUDE_FROM_ALL)
+    set(glm_FOUND TRUE)
+endif()
+
 if(glm_FOUND)
     message(STATUS "GLM version used: SYSTEM")
     if(NOT TARGET glm::glm)