[Bug c++/122677] [modules] g++ cannot write CMI if the repository path is absolute.

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122677

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Your patch makes no sense, errno is only set if failed == -1 so testing errno
when
failed == 0 cannot be right.