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Increase the minimum linux-gnu versions
This is implementing the MCP from rust-lang/compiler-team#493. It is increasing the minimum requirements of a couple Tier 1 targets, and others at lower tiers, so this should go through FCP sign-offs for both `T-compiler` and `T-release`. The new `linux-gnu` baseline is kernel 3.2 and glibc 2.17. We will also take that kernel as the minimum floor for _all_ `*-linux-*` targets, so it may be broadly assumed in the implementation of the standard library. That does not preclude specific targets from having greater requirements where it makes sense, like a new arch needing something newer, or a platform like `linux-android` choosing a newer baseline.
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‎README.md‎

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@@ -233,7 +233,7 @@ Snapshot binaries are currently built and tested on several platforms:
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| Platform / Architecture | x86 | x86_64 |
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|---------------------------------------------|-----|--------|
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| Windows (7, 8, 10, ...) | ✓ | ✓ |
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| Linux (kernel 2.6.32, glibc 2.11 or later) | ✓ | ✓ |
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| Linux (kernel 3.2, glibc 2.17 or later) | ✓ | ✓ |
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| macOS (10.7 Lion or later) | (\*) | ✓ |
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(\*): Apple dropped support for running 32-bit binaries starting from macOS 10.15 and iOS 11.

‎src/ci/docker/README.md‎

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@@ -219,44 +219,49 @@ For targets: `armv7-unknown-linux-gnueabihf`
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For targets: `aarch64-unknown-linux-gnu`
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- Path and misc options > Prefix directory = /x-tools/${CT\_TARGET}
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- Path and misc options > Use a mirror = ENABLE
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- Path and misc options > Base URL = https://ci-mirrors.rust-lang.org/rustc
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- Target options > Target Architecture = arm
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- Target options > Bitness = 64-bit
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- Operating System > Target OS = linux
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- Operating System > Linux kernel version = 4.2.6
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- Operating System > Linux kernel version = 4.1.49
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- Binary utilities > Version of binutils = 2.32
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- C-library > glibc version = 2.17 -- aarch64 support was introduced in this version
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- C compiler > gcc version = 5.2.0
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- C compiler > gcc version = 8.3.0
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- C compiler > C++ = ENABLE -- to cross compile LLVM
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### `powerpc-linux-gnu.config`
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For targets: `powerpc-unknown-linux-gnu`
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- Path and misc options > Prefix directory = /x-tools/${CT\_TARGET}
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- Path and misc options > Patches origin = Bundled, then local
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- Path and misc options > Local patch directory = /tmp/patches
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- Path and misc options > Use a mirror = ENABLE
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- Path and misc options > Base URL = https://ci-mirrors.rust-lang.org/rustc
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- Target options > Target Architecture = powerpc
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- Target options > Emit assembly for CPU = powerpc -- pure 32-bit PowerPC
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- Operating System > Target OS = linux
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- Operating System > Linux kernel version = 2.6.32.68 -- ~RHEL6 kernel
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- C-library > glibc version = 2.11.1 -- ~SLE11-SP4 glibc
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- C compiler > gcc version = 5.2.0
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- Operating System > Linux kernel version = 3.2.101
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- Binary utilities > Version of binutils = 2.32
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- C-library > glibc version = 2.17 -- ~RHEL7 glibc
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- C compiler > gcc version = 8.3.0
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- C compiler > C++ = ENABLE -- to cross compile LLVM
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### `powerpc64-linux-gnu.config`
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For targets: `powerpc64-unknown-linux-gnu`
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- Path and misc options > Prefix directory = /x-tools/${CT\_TARGET}
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- Path and misc options > Patches origin = Bundled, then local
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- Path and misc options > Local patch directory = /tmp/patches
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- Path and misc options > Use a mirror = ENABLE
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- Path and misc options > Base URL = https://ci-mirrors.rust-lang.org/rustc
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- Target options > Target Architecture = powerpc
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- Target options > Bitness = 64-bit
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- Target options > Emit assembly for CPU = power4 -- (+)
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- Target options > Tune for CPU = power6 -- (+)
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- Operating System > Target OS = linux
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- Operating System > Linux kernel version = 2.6.32.68 -- ~RHEL6 kernel
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- C-library > glibc version = 2.11.1 -- ~SLE11-SP4 glibc
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- C compiler > gcc version = 5.2.0
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- Operating System > Linux kernel version = 3.2.101
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- Binary utilities > Version of binutils = 2.32
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- C-library > glibc version = 2.17 -- ~RHEL7 glibc
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- C compiler > gcc version = 8.3.0
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- C compiler > C++ = ENABLE -- to cross compile LLVM
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(+) These CPU options match the configuration of the toolchains in RHEL6.
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For targets: `s390x-unknown-linux-gnu`
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- Path and misc options > Prefix directory = /x-tools/${CT\_TARGET}
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- Path and misc options > Patches origin = Bundled, then local
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- Path and misc options > Local patch directory = /tmp/patches
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- Path and misc options > Use a mirror = ENABLE
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- Path and misc options > Base URL = https://ci-mirrors.rust-lang.org/rustc
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- Target options > Target Architecture = s390
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- Target options > Bitness = 64-bit
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- Operating System > Target OS = linux
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- Operating System > Linux kernel version = 2.6.32.71 -- ~RHEL6 kernel
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- C-library > glibc version = 2.12.1 -- ~RHEL6 glibc
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- Operating System > Linux kernel version = 3.2.101
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- Binary utilities > Version of binutils = 2.32
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- C-library > glibc version = 2.17 -- ~RHEL7 glibc
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- C compiler > gcc version = 8.3.0
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- C compiler > gcc extra config = --with-arch=z10 -- LLVM's minimum support
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- C compiler > C++ = ENABLE -- to cross compile LLVM

‎src/ci/docker/host-x86_64/dist-aarch64-linux/Dockerfile‎

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FROM ubuntu:20.04
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RUN apt-get update && \
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apt-get install -y --no-install-recommends \
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curl \
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ca-certificates
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WORKDIR /tmp
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RUN curl -f https://curl.se/ca/cacert.pem -o cacert.pem
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FROM ubuntu:16.04
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# The ca-certificates in ubuntu-16 is too old, so update the certificates
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# with something more recent.
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COPY --from=0 /tmp/cacert.pem /tmp/cacert.pem
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ENV CURL_CA_BUNDLE /tmp/cacert.pem
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COPY scripts/cross-apt-packages.sh /scripts/
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RUN sh /scripts/cross-apt-packages.sh
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# Ubuntu 16.04 (this container) ships with make 4, but something in the
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# toolchains we build below chokes on that, so go back to make 3
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COPY scripts/make3.sh /scripts/
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RUN sh /scripts/make3.sh
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COPY scripts/crosstool-ng.sh /scripts/
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RUN sh /scripts/crosstool-ng.sh
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COPY scripts/crosstool-ng-1.24.sh /scripts/
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RUN sh /scripts/crosstool-ng-1.24.sh
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COPY scripts/rustbuild-setup.sh /scripts/
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RUN sh /scripts/rustbuild-setup.sh
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COPY scripts/sccache.sh /scripts/
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RUN sh /scripts/sccache.sh
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COPY scripts/cmake.sh /scripts/
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RUN /scripts/cmake.sh
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ENV PATH=$PATH:/x-tools/aarch64-unknown-linux-gnueabi/bin
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ENV PATH=$PATH:/x-tools/aarch64-unknown-linux-gnu/bin
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ENV CC_aarch64_unknown_linux_gnu=aarch64-unknown-linux-gnueabi-gcc \
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AR_aarch64_unknown_linux_gnu=aarch64-unknown-linux-gnueabi-ar \
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CXX_aarch64_unknown_linux_gnu=aarch64-unknown-linux-gnueabi-g++
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ENV CC_aarch64_unknown_linux_gnu=aarch64-unknown-linux-gnu-gcc \
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AR_aarch64_unknown_linux_gnu=aarch64-unknown-linux-gnu-ar \
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CXX_aarch64_unknown_linux_gnu=aarch64-unknown-linux-gnu-g++
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ENV HOSTS=aarch64-unknown-linux-gnu
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