Auto merge of #103062 - cuviper:dist-mips, r=Mark-Simulacrum

Upgrade dist-mips*-linux to ubuntu:22.04 + crosstool-ng

These have no change in compatibility, still Linux 4.4 and glibc 2.23.

The main motivation for upgrading is that LLVM 16 will require at least GCC 7.1. Using crosstool-ng lets us choose our own toolchain versions, and then the Ubuntu version doesn't matter so much, just for the host compilation while we cross-compile.

src/ci/docker/README.md

@@ -250,6 +250,92 @@ For targets: `i586-unknown-linux-gnu`
 (\*) Compressed debug is enabled by default for gas (assembly) on Linux/x86 targets,
      but that makes our `compiler_builtins` incompatible with binutils < 2.32.
 
+### `mips-linux-gnu.config`
+
+For targets: `mips-unknown-linux-gnu`
+
+- Path and misc options > Prefix directory = /x-tools/${CT\_TARGET}
+- Path and misc options > Use a mirror = ENABLE
+- Path and misc options > Base URL = https://ci-mirrors.rust-lang.org/rustc
+- Path and misc options > Patches origin = Bundled, then local
+- Path and misc options > Local patch directory = /tmp/patches
+- Target options > Target Architecture = mips
+- Target options > ABI = o32
+- Target options > Endianness = Big endian
+- Target options > Bitness = 32-bit
+- Target options > Architecture level = mips32r2
+- Operating System > Target OS = linux
+- Operating System > Linux kernel version = 4.4.174
+- Binary utilities > Version of binutils = 2.32
+- C-library > glibc version = 2.23
+- C compiler > gcc version = 8.3.0
+- C compiler > gcc extra config = --with-fp-32=xx --with-odd-spreg-32=no
+- C compiler > C++ = ENABLE -- to cross compile LLVM
+
+### `mipsel-linux-gnu.config`
+
+For targets: `mipsel-unknown-linux-gnu`
+
+- Path and misc options > Prefix directory = /x-tools/${CT\_TARGET}
+- Path and misc options > Use a mirror = ENABLE
+- Path and misc options > Base URL = https://ci-mirrors.rust-lang.org/rustc
+- Path and misc options > Patches origin = Bundled, then local
+- Path and misc options > Local patch directory = /tmp/patches
+- Target options > Target Architecture = mips
+- Target options > ABI = o32
+- Target options > Endianness = Little endian
+- Target options > Bitness = 32-bit
+- Target options > Architecture level = mips32r2
+- Operating System > Target OS = linux
+- Operating System > Linux kernel version = 4.4.174
+- Binary utilities > Version of binutils = 2.32
+- C-library > glibc version = 2.23
+- C compiler > gcc version = 8.3.0
+- C compiler > gcc extra config = --with-fp-32=xx --with-odd-spreg-32=no
+- C compiler > C++ = ENABLE -- to cross compile LLVM
+
+### `mips64-linux-gnu.config`
+
+For targets: `mips64-unknown-linux-gnuabi64`
+
+- Path and misc options > Prefix directory = /x-tools/${CT\_TARGET}
+- Path and misc options > Use a mirror = ENABLE
+- Path and misc options > Base URL = https://ci-mirrors.rust-lang.org/rustc
+- Path and misc options > Patches origin = Bundled, then local
+- Path and misc options > Local patch directory = /tmp/patches
+- Target options > Target Architecture = mips
+- Target options > ABI = n64
+- Target options > Endianness = Big endian
+- Target options > Bitness = 64-bit
+- Target options > Architecture level = mips64r2
+- Operating System > Target OS = linux
+- Operating System > Linux kernel version = 4.4.174
+- Binary utilities > Version of binutils = 2.32
+- C-library > glibc version = 2.23
+- C compiler > gcc version = 8.3.0
+- C compiler > C++ = ENABLE -- to cross compile LLVM
+
+### `mips64el-linux-gnu.config`
+
+For targets: `mips64el-unknown-linux-gnuabi64`
+
+- Path and misc options > Prefix directory = /x-tools/${CT\_TARGET}
+- Path and misc options > Use a mirror = ENABLE
+- Path and misc options > Base URL = https://ci-mirrors.rust-lang.org/rustc
+- Path and misc options > Patches origin = Bundled, then local
+- Path and misc options > Local patch directory = /tmp/patches
+- Target options > Target Architecture = mips
+- Target options > ABI = n64
+- Target options > Endianness = Little endian
+- Target options > Bitness = 64-bit
+- Target options > Architecture level = mips64r2
+- Operating System > Target OS = linux
+- Operating System > Linux kernel version = 4.4.174
+- Binary utilities > Version of binutils = 2.32
+- C-library > glibc version = 2.23
+- C compiler > gcc version = 8.3.0
+- C compiler > C++ = ENABLE -- to cross compile LLVM
+
 ### `powerpc-linux-gnu.config`
 
 For targets: `powerpc-unknown-linux-gnu`

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

@@ -1,31 +1,30 @@
-FROM ubuntu:16.04
-
-RUN apt-get update && apt-get install -y --no-install-recommends \
-  g++ \
-  make \
-  ninja-build \
-  file \
-  curl \
-  ca-certificates \
-  python3 \
-  git \
-  cmake \
-  sudo \
-  gdb \
-  xz-utils \
-  g++-mips-linux-gnu \
-  libssl-dev \
-  pkg-config
+FROM ubuntu:22.04
 
+COPY scripts/cross-apt-packages.sh /scripts/
+RUN sh /scripts/cross-apt-packages.sh
+
+COPY scripts/crosstool-ng-1.24.sh /scripts/
+RUN sh /scripts/crosstool-ng-1.24.sh
+
+COPY scripts/rustbuild-setup.sh /scripts/
+RUN sh /scripts/rustbuild-setup.sh
+WORKDIR /tmp
+
+COPY host-x86_64/dist-mips-linux/patches/ /tmp/patches/
+COPY host-x86_64/dist-mips-linux/mips-linux-gnu.config host-x86_64/dist-mips-linux/build-mips-toolchain.sh /tmp/
+RUN su rustbuild -c ./build-mips-toolchain.sh
 
 COPY scripts/sccache.sh /scripts/
 RUN sh /scripts/sccache.sh
 
-COPY scripts/cmake.sh /scripts/
-RUN /scripts/cmake.sh
+ENV PATH=$PATH:/x-tools/mips-unknown-linux-gnu/bin
+
+ENV \
+    CC_mips_unknown_linux_gnu=mips-unknown-linux-gnu-gcc \
+    AR_mips_unknown_linux_gnu=mips-unknown-linux-gnu-ar \
+    CXX_mips_unknown_linux_gnu=mips-unknown-linux-gnu-g++
 
 ENV HOSTS=mips-unknown-linux-gnu
 
-ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs \
-    --set llvm.allow-old-toolchain
+ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
 ENV SCRIPT python3 ../x.py dist --host $HOSTS --target $HOSTS

src/ci/docker/host-x86_64/dist-mips-linux/build-mips-toolchain.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -ex
+
+hide_output() {
+  set +x
+  on_err="
+echo ERROR: An error was encountered with the build.
+cat /tmp/build.log
+exit 1
+"
+  trap "$on_err" ERR
+  bash -c "while true; do sleep 30; echo \$(date) - building ...; done" &
+  PING_LOOP_PID=$!
+  "$@" &> /tmp/build.log
+  rm /tmp/build.log
+  trap - ERR
+  kill $PING_LOOP_PID
+  set -x
+}
+
+mkdir build
+cd build
+cp ../mips-linux-gnu.config .config
+hide_output ct-ng build
+cd ..
+rm -rf build