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 -- 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
