On Tue, Jun 25, 2019 at 08:46:26PM -0300, Arnaldo Carvalho de Melo wrote: > Em Tue, Jun 25, 2019 at 01:27:46PM -0700, Nathan Chancellor escreveu: > > On Tue, Jun 25, 2019 at 09:53:09PM +0200, Thomas Gleixner wrote: > > > On Tue, 25 Jun 2019, Nathan Chancellor wrote: > > > > On Tue, Jun 25, 2019 at 10:12:42AM -0700, Kees Cook wrote: > > > > > On Tue, Jun 25, 2019 at 09:18:46AM +0200, Peter Zijlstra wrote: > > > > > > Can it build a kernel without patches yet? That is, why should I > > > > > > care > > > > > > what LLVM does? > > > > > > > > > > Yes. LLVM trunk builds and boots x86 now. As for distro availability, > > > > > AIUI, the asm-goto feature missed the 9.0 LLVM branch point, so it'll > > > > > appear in the following release. > > > > > > > > > > -- > > > > > Kees Cook > > > > > > > > I don't think that's right. LLVM 9 hasn't been branched yet so it should > > > > make it in. > > > > > > > > http://lists.llvm.org/pipermail/llvm-dev/2019-June/133155.html > > > > > > > > If anyone wants to play around with it before then, we wrote a > > > > self-contained script that will build an LLVM toolchain suitable for > > > > kernel development: > > > > > > > > https://github.com/ClangBuiltLinux/tc-build > > > > > > Useful! > > > > > > But can the script please check for a minimal clang version required to > > > build that thing. > > > > > > The default clang-3.8 which is installed on Debian stretch explodes. The > > > 6.0 variant from backports works as advertised. > > > > > > > Hmmm interesting, I test a lot of different distros using Docker > > containers to make sure the script works universally and that includes > > Debian stretch, which is the stress tester because all of the packages > > are older. > > Interesting, I've been building tools/perf, tools/{lib,arch/include}, > etc with lots of clang versions for quite a while, all in containers, > using podman: >
Huh, interesting, I'm going to have to check that out (first time I have heard of podman). If anyone cares to see it, here is my little crude script: https://github.com/nathanchance/scripts/blob/d8cfcc05fc50453503d48e32767f24dfac82dcd4/funcs/cbl#L693-L776 Cheers, Nathan > ---------------------------- > The first ones are container based builds of tools/perf with and without > libelf > support. Where clang is available, it is also used to build perf with/without > libelf, and building with LIBCLANGLLVM=1 (built-in clang) with gcc and clang > when clang and its devel libraries are installed. > > Several are cross builds, the ones with -x-ARCH and the android one, and those > may not have all the features built, due to lack of multi-arch devel packages, > available and being used so far on just a few, like > debian:experimental-x-{arm64,mipsel}. > > $ export PERF_TARBALL=http://192.168.124.1/perf/perf-5.2.0-rc4.tar.xz > $ dm > 1 alpine:3.4 : Ok gcc (Alpine 5.3.0) 5.3.0, clang > version 3.8.0 (tags/RELEASE_380/final) > 2 alpine:3.5 : Ok gcc (Alpine 6.2.1) 6.2.1 20160822, > clang version 3.8.1 (tags/RELEASE_381/final) > 3 alpine:3.6 : Ok gcc (Alpine 6.3.0) 6.3.0, clang > version 4.0.0 (tags/RELEASE_400/final) > 4 alpine:3.7 : Ok gcc (Alpine 6.4.0) 6.4.0, Alpine > clang version 5.0.0 (tags/RELEASE_500/final) (based on LLVM 5.0.0) > 5 alpine:3.8 : Ok gcc (Alpine 6.4.0) 6.4.0, Alpine > clang version 5.0.1 (tags/RELEASE_501/final) (based on LLVM 5.0.1) > 6 alpine:3.9 : Ok gcc (Alpine 8.3.0) 8.3.0, Alpine > clang version 5.0.1 (tags/RELEASE_502/final) (based on LLVM 5.0.1) > 7 alpine:edge : Ok gcc (Alpine 8.3.0) 8.3.0, Alpine > clang version 7.0.1 (tags/RELEASE_701/final) (based on LLVM 7.0.1) > 8 amazonlinux:1 : Ok gcc (GCC) 7.2.1 20170915 (Red Hat > 7.2.1-2), clang version 3.6.2 (tags/RELEASE_362/final) > 9 amazonlinux:2 : Ok gcc (GCC) 7.3.1 20180303 (Red Hat > 7.3.1-5), clang version 7.0.1 (Amazon Linux 2 7.0.1-1.amzn2.0.2) > 10 android-ndk:r12b-arm : Ok arm-linux-androideabi-gcc (GCC) > 4.9.x 20150123 (prerelease) > 11 android-ndk:r15c-arm : Ok arm-linux-androideabi-gcc (GCC) > 4.9.x 20150123 (prerelease) > 12 centos:5 : Ok gcc (GCC) 4.1.2 20080704 (Red Hat > 4.1.2-55) > 13 centos:6 : Ok gcc (GCC) 4.4.7 20120313 (Red Hat > 4.4.7-23) > 14 centos:7 : Ok gcc (GCC) 4.8.5 20150623 (Red Hat > 4.8.5-36) > 15 clearlinux:latest : Ok gcc (Clear Linux OS for Intel > Architecture) 9.1.1 20190611 gcc-9-branch@272162 > 16 debian:8 : Ok gcc (Debian 4.9.2-10+deb8u2) 4.9.2, > Debian clang version 3.5.0-10 (tags/RELEASE_350/final) (based on LLVM 3.5.0) > 17 debian:9 : Ok gcc (Debian 6.3.0-18+deb9u1) 6.3.0 > 20170516, clang version 3.8.1-24 (tags/RELEASE_381/final) > 18 debian:experimental : Ok gcc (Debian 8.3.0-7) 8.3.0, clang > version 7.0.1-8 (tags/RELEASE_701/final) > 19 debian:experimental-x-arm64 : Ok aarch64-linux-gnu-gcc (Debian > 8.3.0-7) 8.3.0 > 20 debian:experimental-x-mips : Ok mips-linux-gnu-gcc (Debian 8.3.0-7) > 8.3.0 > 21 debian:experimental-x-mips64 : Ok mips64-linux-gnuabi64-gcc (Debian > 8.3.0-7) 8.3.0 > 22 debian:experimental-x-mipsel : Ok mipsel-linux-gnu-gcc (Debian > 8.3.0-7) 8.3.0 > 23 fedora:20 : Ok gcc (GCC) 4.8.3 20140911 (Red Hat > 4.8.3-7), clang version 3.4.2 (tags/RELEASE_34/dot2-final) > 24 fedora:22 : Ok gcc (GCC) 5.3.1 20160406 (Red Hat > 5.3.1-6) > 25 fedora:23 : Ok gcc (GCC) 5.3.1 20160406 (Red Hat > 5.3.1-6), clang version 3.7.0 (tags/RELEASE_370/final) > 26 fedora:24 : Ok gcc (GCC) 6.3.1 20161221 (Red Hat > 6.3.1-1), clang version 3.8.1 (tags/RELEASE_381/final) > 27 fedora:24-x-ARC-uClibc : Ok arc-linux-gcc (ARCompact ISA Linux > uClibc toolchain 2017.09-rc2) 7.1.1 20170710 > 28 fedora:25 : Ok gcc (GCC) 6.4.1 20170727 (Red Hat > 6.4.1-1), clang version 3.9.1 (tags/RELEASE_391/final) > 29 fedora:26 : Ok gcc (GCC) 7.3.1 20180130 (Red Hat > 7.3.1-2), clang version 4.0.1 (tags/RELEASE_401/final) > 30 fedora:27 : Ok gcc (GCC) 7.3.1 20180712 (Red Hat > 7.3.1-6), clang version 5.0.2 (tags/RELEASE_502/final) > 31 fedora:28 : Ok gcc (GCC) 8.3.1 20190223 (Red Hat > 8.3.1-2), clang version 6.0.1 (tags/RELEASE_601/final) > 32 fedora:29 : Ok gcc (GCC) 8.3.1 20190223 (Red Hat > 8.3.1-2), clang version 7.0.1 (Fedora 7.0.1-6.fc29) > 33 fedora:30 : Ok gcc (GCC) 9.1.1 20190503 (Red Hat > 9.1.1-1), clang version 8.0.0 (Fedora 8.0.0-1.fc30) > 34 fedora:30-x-ARC-glibc : Ok arc-linux-gcc (ARC HS GNU/Linux > glibc toolchain 2019.03-rc1) 8.3.1 20190225 > 35 fedora:30-x-ARC-uClibc : Ok arc-linux-gcc (ARCv2 ISA Linux > uClibc toolchain 2019.03-rc1) 8.3.1 20190225 > 36 fedora:31 : Ok gcc (GCC) 9.1.1 20190605 (Red Hat > 9.1.1-2), clang version 8.0.0 (Fedora 8.0.0-3.fc31) > 37 fedora:rawhide : Ok gcc (GCC) 9.1.1 20190605 (Red Hat > 9.1.1-2), clang version 8.0.0 (Fedora 8.0.0-3.fc31) > 38 gentoo-stage3-amd64:latest : Ok gcc (Gentoo 8.3.0-r1 p1.1) 8.3.0 > 39 mageia:5 : Ok gcc (GCC) 4.9.2, clang version > 3.5.2 (tags/RELEASE_352/final) > 40 mageia:6 : Ok gcc (Mageia 5.5.0-1.mga6) 5.5.0, > clang version 3.9.1 (tags/RELEASE_391/final) > 41 mageia:7 : Ok gcc (Mageia > 8.3.1-0.20190524.1.mga7) 8.3.1 20190524, clang version 8.0.0 (Mageia > 8.0.0-1.mga7) > 42 manjaro:latest : Ok gcc (GCC) 8.3.0, clang version > 8.0.0 (tags/RELEASE_800/final) > 1 openmandriva:cooker : Ok gcc (GCC) 9.1.0 20190503 > (OpenMandriva) > 43 opensuse:15.0 : Ok gcc (SUSE Linux) 7.4.1 20190424 > [gcc-7-branch revision 270538], clang version 5.0.1 (tags/RELEASE_501/final > 312548) > 44 opensuse:15.1 : Ok gcc (SUSE Linux) 7.4.0, clang > version 7.0.1 (tags/RELEASE_701/final 349238) > 45 opensuse:42.3 : Ok gcc (SUSE Linux) 4.8.5, clang > version 3.8.0 (tags/RELEASE_380/final 262553) > 46 opensuse:tumbleweed : Ok gcc (SUSE Linux) 9.1.1 20190520 > [gcc-9-branch revision 271396], clang version 7.0.1 (tags/RELEASE_701/final > 349238) > 47 oraclelinux:6 : Ok gcc (GCC) 4.4.7 20120313 (Red Hat > 4.4.7-23.0.1) > 48 oraclelinux:7 : Ok gcc (GCC) 4.8.5 20150623 (Red Hat > 4.8.5-36.0.1), clang version 3.4.2 (tags/RELEASE_34/dot2-final) > 49 ubuntu:12.04 : Ok gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) > 4.6.3 > 50 ubuntu:14.04 : Ok gcc (Ubuntu 4.8.4-2ubuntu1~14.04.4) > 4.8.4, Ubuntu clang version 3.4-1ubuntu3 (tags/RELEASE_34/final) (based on > LLVM 3.4) > 51 ubuntu:16.04 : Ok gcc (Ubuntu > 5.4.0-6ubuntu1~16.04.11) 5.4.0 20160609, clang version 3.8.0-2ubuntu4 > (tags/RELEASE_380/final) > 52 ubuntu:16.04-x-arm : Ok arm-linux-gnueabihf-gcc > (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609 > 53 ubuntu:16.04-x-arm64 : Ok aarch64-linux-gnu-gcc > (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609 > 54 ubuntu:16.04-x-powerpc : Ok powerpc-linux-gnu-gcc (Ubuntu > 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609 > 55 ubuntu:16.04-x-powerpc64 : Ok powerpc64-linux-gnu-gcc (Ubuntu/IBM > 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609 > 56 ubuntu:16.04-x-powerpc64el : Ok powerpc64le-linux-gnu-gcc > (Ubuntu/IBM 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609 > 57 ubuntu:16.04-x-s390 : Ok s390x-linux-gnu-gcc (Ubuntu > 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609 > 58 ubuntu:18.04 : Ok gcc (Ubuntu 7.4.0-1ubuntu1~18.04) > 7.4.0, clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final) > 59 ubuntu:18.04-x-arm : Ok arm-linux-gnueabihf-gcc > (Ubuntu/Linaro 7.4.0-1ubuntu1~18.04) 7.4.0 > 60 ubuntu:18.04-x-arm64 : Ok aarch64-linux-gnu-gcc > (Ubuntu/Linaro 7.4.0-1ubuntu1~18.04) 7.4.0 > 61 ubuntu:18.04-x-m68k : Ok m68k-linux-gnu-gcc (Ubuntu > 7.4.0-1ubuntu1~18.04) 7.4.0 > 62 ubuntu:18.04-x-powerpc : Ok powerpc-linux-gnu-gcc (Ubuntu > 7.4.0-1ubuntu1~18.04) 7.4.0 > 63 ubuntu:18.04-x-powerpc64 : Ok powerpc64-linux-gnu-gcc (Ubuntu > 7.4.0-1ubuntu1~18.04) 7.4.0 > 64 ubuntu:18.04-x-powerpc64el : Ok powerpc64le-linux-gnu-gcc (Ubuntu > 7.4.0-1ubuntu1~18.04) 7.4.0 > 65 ubuntu:18.04-x-riscv64 : Ok riscv64-linux-gnu-gcc (Ubuntu > 7.4.0-1ubuntu1~18.04) 7.4.0 > 66 ubuntu:18.04-x-s390 : Ok s390x-linux-gnu-gcc (Ubuntu > 7.4.0-1ubuntu1~18.04) 7.4.0 > 67 ubuntu:18.04-x-sh4 : Ok sh4-linux-gnu-gcc (Ubuntu > 7.4.0-1ubuntu1~18.04) 7.4.0 > 68 ubuntu:18.04-x-sparc64 : Ok sparc64-linux-gnu-gcc (Ubuntu > 7.4.0-1ubuntu1~18.04) 7.4.0 > 69 ubuntu:18.10 : Ok gcc (Ubuntu 8.3.0-6ubuntu1~18.10.1) > 8.3.0, clang version 7.0.0-3 (tags/RELEASE_700/final) > 70 ubuntu:19.04 : Ok gcc (Ubuntu 8.3.0-6ubuntu1) 8.3.0, > clang version 8.0.0-3 (tags/RELEASE_800/final) > 71 ubuntu:19.04-x-alpha : Ok alpha-linux-gnu-gcc (Ubuntu > 8.3.0-6ubuntu1) 8.3.0 > 72 ubuntu:19.04-x-arm64 : Ok aarch64-linux-gnu-gcc > (Ubuntu/Linaro 8.3.0-6ubuntu1) 8.3.0 > 73 ubuntu:19.04-x-hppa : Ok hppa-linux-gnu-gcc (Ubuntu > 8.3.0-6ubuntu1) 8.3.0 > $ > > - Arnaldo
