For what it's worth, that ld error message I ran into does point to the linker being run twice concurrently with same commandline. ( See also https://bugzilla.redhat.com/show_bug.cgi?id=809122 )
On Fri, Jun 20, 2014 at 7:35 AM, Leif Walsh <leif.wa...@gmail.com> wrote: > wow > > > On Fri, Jun 20, 2014 at 10:31 AM, Dan Kegel <d...@kegel.com> wrote: >> >> It occurs to me that invoking make on this cmake-generated makefile >> with two targets and -j4 has indeed triggered a more serious problem, >> and the build fails nondeterministically with an internal error in ld >> (presumably because the linker's being invoked twice in parallel on >> the same file?). >> See https://bugs.launchpad.net/ubuntu/+source/binutils/+bug/423756 >> >> On Fri, Jun 20, 2014 at 6:45 AM, Dan Kegel <d...@kegel.com> wrote: >> > On Fri, Jun 20, 2014 at 3:02 AM, David Cole <dlrd...@aol.com> wrote: >> >>>> 138% >> >>>> make -j4 all examples_noinst >> >> >> >>> I've seen this too but never noticed a pattern about when it happens. >> >> >> >> Does it always happen when naming more than one target with make -j? >> >> >> >> I thought you were not supposed to name more than one target with make >> >> -j... >> >> (but I don't understand fully exactly why that's a bad thing...) >> > >> > make itself certainly doesn't have a bug along these lines; you can make >> > -j >> > a hundred targets at once and it won't double-build -- if the Makefile >> > has proper dependencies. >> > >> > I could try to demonstrate the problem with a tiny CMakeLists.txt, >> > but I'm not sure when I'll have time. >> > - Dan > > > > > -- > Cheers, > Leif -- Powered by www.kitware.com Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Kitware offers various services to support the CMake community. For more information on each offering, please visit: CMake Support: http://cmake.org/cmake/help/support.html CMake Consulting: http://cmake.org/cmake/help/consulting.html CMake Training Courses: http://cmake.org/cmake/help/training.html Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Follow this link to subscribe/unsubscribe: http://public.kitware.com/mailman/listinfo/cmake
