https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108464
--- Comment #1 from Richard Purdie <richard.purdie at linuxfoundation dot org> --- I can see why that would change behaviour with the patch :(. It is a tough dilemma since without the patch, files might have prefixes removed some of the time but not all the time, depending on whether they were accessed via a symlink (or similar) or not. It was effectively impossible to remap some prefix values meaning in some cases output files couldn't be build deterministically. One possible way to fix this issue might be to call realpath on DW_AT_comp_dir so that we're always working on canonicalized paths? I'm not sure if that would be acceptable or not, the challenge right now is that we're making comparisons against things which aren't always definitive.
