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
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