https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92376
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- After fixing that, there's still a problem, as <pstl/pstl_config.h> isn't installed for freestanding: In file included from /home/jwakely/gcc/freestanding/include/c++/10.0.0/version:35, from <stdin>:1: /home/jwakely/gcc/freestanding/include/c++/10.0.0/powerpc64le-unknown-linux-gnu/bits/c++config.h:679:10: fatal error: pstl/pstl_config.h: No such file or directory 679 | #include <pstl/pstl_config.h> | ^~~~~~~~~~~~~~~~~~~~ compilation terminated. The install-freestanding-headers target could create that as an empty file.