On Sat, Sep 28, 2019 at 02:20:29PM +0100, Ramsay Jones wrote: > On 28/09/2019 02:44, Luc Van Oostenryck wrote: > > On Sat, Sep 28, 2019 at 02:27:40AM +0100, Ramsay Jones wrote: > >> On 28/09/2019 00:00, Luc Van Oostenryck wrote: ... > >>> I suppose that `llvm-config --host-target` returns x86_64-unknown-cygwin ? > >> > >> Ah no, I had meant to mention this: > >> > >> $ llvm-config --host-target > >> x86_64-unknown-windows-cygnus > >> $ > >> > >> ... which agrees with clang, but not llc. > > > > Then the patch could simply be something like: > > + LLC_ARCH_OPTS="$LLC_ARCH_OPTS -mtriple=$(llvm-config --host-target)" > > > > but I'm not sure how this would behave with cygwin32 or when using -m32. > > Yeah, I don't know either. Unfortunately, my cygwin32 installation > is *very* old and on an Windows XP laptop that I would rather not > connect to the internet at this point ... (Also, I don't think cygwin > supports windows XP anyway, so ...) > > Anyway, I think it is somewhat odd that clang and the llvm tools > don't agree on the host 'triple' used during configuration. ;-) >From what I understand one is the triple for the build/config *host* and the other is for llvm/clang *target*. The first one is produced and used by the config/build system at build time, the second one is produced and used by LLVM/clang itself at run-time. They share syntax and the first is used as default for the second but that's all (but yes, this doesn't explain why it was working in the previous version). > I would rather not, but I guess I may have to download the cygwin > source packages for clang/llvm and take a look at how the binary > packages are configured/built. I suppose this could be a problem > with the cygwin packaging, or with upstream - dunno! :( > > Hmm, I will _hopefully_ find time to look at that soon, but I don't > think anyone needs a quick solution to this ... :-D Yes, indeed. This cygwin/sparse-llvm combo is quite 'exotic' (and, as far as I know, nobody is using sparse-llvm). I would be perfectly fine with a patch like the one here above. Best regards. -- Luc
