https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81797
--- Comment #19 from Chris Johns <chrisj at rtems dot org> --- (In reply to Francois-Xavier Coudert from comment #18) > Adding ".NOTPARALLEL: install-headers" to the libstdc++ Makefile fixes it > perfectly, from what we can see on our apple-darwin test machines. We've now > had dozens of compilations of GCC with no error, once that is applied. > Without the patch, about ~70% of parallel compilations fail, on machines > ranging from 2 to 8 cores. Are you able to try an RTEMS tools build? It is a cross-compiler so I am wondering if there is something still not right in this case. I can push my changes to the RTEMS Source Builder tool we use to build tools and post or send instructions. > I'd like to suggest ".NOTPARALLEL: install-headers" to be considered as > official patch. The other solution is to unroll the shell loops and create the dependences. I had to do this in RTEMS to get preinstalled headers to work. Chris
