https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121709
--- Comment #8 from Gaius Mulley <gaius at gcc dot gnu.org> --- Created attachment 62242 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=62242&action=edit Proposed fix for default include directories using cpp_include_defaults Many thanks for the bug report and build fail log, apologies for the breakage. Here is a proposed patch, currently bootstrapped on debian amd64.
