jrtc27 added a comment. In D52050#2441133 <https://reviews.llvm.org/D52050#2441133>, @glaubitz wrote:
> In D52050#2441094 <https://reviews.llvm.org/D52050#2441094>, @hvdijk wrote: > >> I've been able to check what Ubuntu 20.10 offers in terms of x32 support. >> Its kernel supports x32 binaries, it provides x32 versions of core system >> libraries in separate packages (e.g. libc6-x32, libx32stdc++6, libx32z1), >> and it provides a compiler that targets x32 by default >> (gcc-x86-64-linux-gnux32). > > I did that, too. In fact, Ubuntu is identical to Debian in this regard as > both the Ubuntu and the Debian gcc packages are maintained by the same > maintainer (Matthias Klose whom I also happen to know personally) who first > uploads these packages to Debian unstable, then syncs to Ubuntu. > > However: > >> These Ubuntu packages do not use the Debian/Ubuntu multiarch approach: the >> packages are completely independent of the corresponding x64 and i386 >> versions with separate names, and nothing in Ubuntu installs any libraries >> into any /lib/x86_64-linux-gnux32-like path. They are intended to allow x32 >> cross compilation on an Ubuntu system, not intended to act as a basis for >> running an x32 Ubuntu system. This appears to be very different from >> Debian's x32 support. That said, cross-compiled binaries do run on Ubuntu >> and it should be possible to build an x32-native LLVM with the >> Ubuntu-provided toolchain. > > Well, Debian has both as - as I already mentioned - the gcc packages in > Debian and Ubuntu are the same. The only difference is that Ubuntu does not > provide an x32 port so there is no possibility to install Ubuntu x32 packages > in the commonly known MultiArch manner. > > Since MultiArch and the -cross packages are somewhat redundant, I'm not so > sure yet which approach to address this issue would be best. I will talk to > Matthias regarding this. What gets done currently for i386? That suffers potentially the same problem given both /usr/lib/gcc/x86_64-linux-gnu/$V/32 and /usr/lib/gcc/i386-linux-gnu/$V are possible locations for an i386 GCC toolchain. Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D52050/new/ https://reviews.llvm.org/D52050 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
