Dne 4.3.2016 v 23:51 Michal Marek napsal(a): > Dne 4.3.2016 v 06:40 Nicolas Pitre napsal(a): >> +cmd_and_fixdep = >> \ >> + $(echo-cmd) $(cmd_$(1)); \ >> + $(ksym_dep_filter) | \ >> + scripts/basic/fixdep -e $(depfile) $@ '$(make-cmd)' \ >> + > $(dot-target).tmp; \ >> + rm -f $(depfile); \ >> + mv -f $(dot-target).tmp $(dot-target).cmd; > > While trying this, I got a SIGBUS from fixdep once. My theory is that > the depfile is mmap()ed by fixdep and modified by the preprocesor run at > the same time. I could not reproduce this so far (still trying). But if > it's really this race, the fix would be to disable dependency generation > in the preprocessor by passing -Wp,MD,/dev/null or somesuch. But we > never had this problem with genksyms, which is weird. It could as well > be that my build machine's memory is faulty :(.
Actually, genksyms does not ran in parallel. neither before nor after this patch. Michal
