Bernhard Voelker wrote: > After pulling to the lastest revision (v8.17-37-g74427c7) and > a successful build (make -j), a subsequent "make syntax-check -j" > failed: > > ... > 8.47 vulnerable_makefile_CVE-2009-4029 > 8.78 copyright_check > CC hostname.o > CCLD arch > CCLD arch > CC hostname.o > CC hostname.o > CCLD arch > 13.02 tight_scope > 15.36 THANKS_in_duplicates > 15.91 po_check > mv: cannot move `.deps/hostname.Tpo' to `.deps/hostname.Po': No such file > or directory > make[1]: *** [hostname.o] Error 1 > make: *** [sc_check-AUTHORS] Error 2 > make: *** Waiting for unfinished jobs.... > mv: cannot stat `.deps/hostname.Tpo': No such file or directory > CCLD hostname > make[1]: *** [hostname.o] Error 1 > make: *** [sc_man_file_correlation] Error 2 > > Another "make syntax-check -j" succeeded, i.e. there's some dependency > which is not taken care of for parallel syntax-check'ing. > > I don't know CU's config scripts enough to know where to look at. > Any idea?
Yes, this is annoying. I hit it pretty regularly, but haven't delved into it enough to fix it. The problem is that two rules are running simultaneously to create arch and hostname, and that leads to a race in automake's dependency-generating code. One solution would be to make automake include $$ in that temporary file name, e.g., .deps/hostname-$$.Tpo. Then, it wouldn't matter if two processes were to run that rule at the same time. The problem arises only with arch and hostname because of their special status (built but not installed), so another possible fix is probably to adjust dependencies to ensure they're built before running the offending rules. A more aggressive solution would be to stop building those two programs by default.
