Auto merge of rust-lang#68037 - msizanoen1:riscv-ci, r=alexcrichton

Distribution CI for riscv64gc-unknown-linux-gnu

This modifies `dist-various-1` to build the standard library for RISC-V GNU/Linux.

r? @alexcrichton

src/ci/docker/dist-various-1/Dockerfile

@@ -2,11 +2,24 @@ FROM ubuntu:16.04
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
   g++ \
+  automake \
+  bison \
+  bzip2 \
+  flex \
+  help2man \
+  libtool-bin \
+  texinfo \
+  unzip \
+  wget \
+  xz-utils \
+  libncurses-dev \
+  gawk \
   make \
   file \
   curl \
   ca-certificates \
   python2.7 \
+  python3 \
   git \
   cmake \
   sudo \
@@ -35,6 +48,18 @@ RUN add-apt-repository ppa:team-gcc-arm-embedded/ppa && \
     apt-get update && \
     apt-get install -y --no-install-recommends gcc-arm-embedded
 
+COPY scripts/rustbuild-setup.sh dist-various-1/build-riscv-toolchain.sh dist-various-1/riscv64-unknown-linux-gnu.config dist-various-1/crosstool-ng.sh /build/
+RUN ./crosstool-ng.sh
+
+# Crosstool-ng will refuse to build as root
+RUN sh ./rustbuild-setup.sh
+USER rustbuild
+
+RUN ./build-riscv-toolchain.sh
+
+USER root
+ENV PATH=/x-tools/riscv64-unknown-linux-gnu/bin:$PATH
+
 COPY dist-various-1/build-rumprun.sh /build
 RUN ./build-rumprun.sh
 
@@ -129,6 +154,7 @@ ENV TARGETS=$TARGETS,riscv32imc-unknown-none-elf
 ENV TARGETS=$TARGETS,riscv32imac-unknown-none-elf
 ENV TARGETS=$TARGETS,riscv64imac-unknown-none-elf
 ENV TARGETS=$TARGETS,riscv64gc-unknown-none-elf
+ENV TARGETS=$TARGETS,riscv64gc-unknown-linux-gnu
 ENV TARGETS=$TARGETS,armebv7r-none-eabi
 ENV TARGETS=$TARGETS,armebv7r-none-eabihf
 ENV TARGETS=$TARGETS,armv7r-none-eabi
@@ -147,6 +173,9 @@ ENV CC_mipsel_unknown_linux_musl=mipsel-openwrt-linux-gcc \
     CC_thumbv7neon_unknown_linux_gnueabihf=arm-linux-gnueabihf-gcc \
     AR_thumbv7neon_unknown_linux_gnueabihf=arm-linux-gnueabihf-ar \
     CXX_thumbv7neon_unknown_linux_gnueabihf=arm-linux-gnueabihf-g++ \
+    CC_riscv64gc_unknown_linux_gnu=riscv64-unknown-linux-gnu-gcc \
+    AR_riscv64gc_unknown_linux_gnu=riscv64-unknown-linux-gnu-ar \
+    CXX_riscv64gc_unknown_linux_gnu=riscv64-unknown-linux-gnu-g++ \
     CC_riscv32i_unknown_none_elf=false \
     CC_riscv32imc_unknown_none_elf=false \
     CC_riscv32imac_unknown_none_elf=false \

src/ci/docker/dist-various-1/build-riscv-toolchain.sh

@@ -0,0 +1,27 @@
+#!/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 -p /tmp/build-riscv
+cp riscv64-unknown-linux-gnu.config /tmp/build-riscv/.config
+cd /tmp/build-riscv
+hide_output ct-ng build
+cd ..
+rm -rf build-riscv

src/ci/docker/dist-various-1/crosstool-ng.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+set -ex
+
+# Mirrored from https://github.com/crosstool-ng/crosstool-ng/archive/crosstool-ng-1.24.0.tar.gz
+url="https://ci-mirrors.rust-lang.org/rustc/crosstool-ng-1.24.0.tar.gz"
+curl -Lf $url | tar xzf -
+cd crosstool-ng-crosstool-ng-1.24.0
+./bootstrap
+./configure --prefix=/usr/local
+make -j$(nproc)
+make install
+cd ..
+rm -rf crosstool-ng-crosstool-ng-1.24.0