On Mon, Mar 08, 2010 at 06:35:02PM +0100, Schmidt, Oliver wrote: >We call from a non-Cygwin shell a non-Cygwin gnumake. The Makefile >rules mostly call a non-Cygwin C compiler and linker. However Makefile >rules calling gawk, cat, cp, echo, mkdir, rm, sed, sh, ... are calling >Cygwin executables. > >If (and only if) we run gnumake in this scenario with the --jobs option >to perform a parallel build then we experience sporadic failures of the >Cygwin executables. Fortunately these failures still happen now and >then when running them with strace. So it was quite easy to find out >that the shared variable installation_root isn't correctly initialized >when things go wrong. > >Checking out src/winsup/cygwin/shared.cc I stumbled over these lines > > /* Initialize installation root dir. */ > if (!installation_root[0]) > init_installation_root ();
Yeah, that's one place that's missing synchronization. I'll check in something tonight which attempts to solve this problem. It's a somewhat tricky problem because adding a mutex here would slow down every invocation of a cygwin program and we don't want to add to the "Why is Cygwin so slow???" scenarios if we can help it. cgf -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
