Add a warning about clang LTO usage

customization.cfg

@@ -86,6 +86,7 @@ _cpusched=""
 _compiler=""
 
 # Clang LTO mode, only available with the "llvm" compiler - options are "no", "full" or "thin".
+# ! This is currently experimental and might result in an unbootable kernel - Not recommended !
 # "no: do not enable LTO"
 # "full: uses 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains."
 # "thin: uses multiple threads, faster and uses less memory, may have a lower runtime performance than Full."

linux-tkg-config/prepare

@@ -182,6 +182,7 @@ _set_compiler(){
     if [ $_basever -ge 512 ]; then
       if [[ -z "$_lto_mode" || ! "$_lto_mode" =~ ^(no|thin|full)$ ]]; then
         plain "Would you like to enable Clang Link Time Optimizations (LTO) ? It may improve the performance of the kernel."
+        warning "This is currently experimental and might result in an unbootable kernel - Not recommended"
         _lto_prompt_array=(
           "No: do not enable LTO"
           "Full: uses 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains."