CI: Update riscv64gc-linux job to 22.04, rename to riscv64gc-gnu

Author: Hoverbear

src/ci/docker/host-x86_64/disabled/riscv64gc-linux/Dockerfile renamed to src/ci/docker/host-x86_64/disabled/riscv64gc-gnu/Dockerfile

@@ -1,39 +1,36 @@
 # based on armhf-gnu/Dockerfile
-FROM ubuntu:20.04
+FROM ubuntu:22.04
 
-RUN echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections
+ARG DEBIAN_FRONTEND=noninteractive
 RUN apt-get update -y && apt-get install -y --no-install-recommends \
-    bc \
-    bison \
-    ca-certificates \
-    cmake \
-    cpio \
-    curl \
-    debian-ports-archive-keyring \
-    debootstrap \
-    flex \
-    gcc \
-    gcc-riscv64-linux-gnu \
-    git \
-    g++-riscv64-linux-gnu \
-    g++ \
-    libc6-dev \
-    libc6-dev-riscv64-cross \
-    libssl-dev \
-    make \
-    ninja-build \
-    patch \
-    python3 \
-    qemu-system-misc \
-    xz-utils
+      bc \
+      bzip2 \
+      ca-certificates \
+      cmake \
+      cpio \
+      curl \
+      file \
+      flex \
+      bison \
+      g++ \
+      g++-riscv64-linux-gnu \
+      git \
+      libc6-dev \
+      libc6-dev-riscv64-cross \
+      libssl-dev \
+      make \
+      ninja-build \
+      python3 \
+      qemu-system-riscv64 \
+      xz-utils
 
-ENV ARCH=riscv
-ENV CROSS_COMPILE=riscv64-linux-gnu-
+ENV ARCH=riscv \
+    CROSS_COMPILE=riscv64-linux-gnu-
 
 WORKDIR /build
 
 # From https://github.com/michaeljclark/busybear-linux/blob/master/conf/linux.config
-COPY host-x86_64/riscv64gc-linux/linux.config /build
+COPY host-x86_64/riscv64gc-gnu/linux.config /build
 
 # Compile the kernel that we're going to be emulating with. This is
 # basically just done to be compatible with the QEMU target that we're going
@@ -49,29 +46,22 @@ RUN curl https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.6.16.tar.xz | tar
 # Compile an instance of busybox as this provides a lightweight system and init
 # binary which we will boot into. Only trick here is configuring busybox to
 # build static binaries.
-RUN curl https://busybox.net/downloads/busybox-1.31.1.tar.bz2 | tar xjf -
-COPY host-x86_64/riscv64gc-linux/0001-Remove-stime-function-calls.patch /build/busybox-1.31.1/
-RUN cd /build/busybox-1.31.1 && \
-    patch -p1 -i 0001-Remove-stime-function-calls.patch && \
-    make defconfig && \
-    sed -i 's/.*CONFIG_STATIC.*/CONFIG_STATIC=y/' .config && \
-    make -j$(nproc) && \
-    make install && \
-    mv _install /tmp/rootfs && \
-    cd /build && \
-    rm -rf busybox-1.31.1
+RUN curl https://www.busybox.net/downloads/busybox-1.32.1.tar.bz2 | tar xjf - && \
+      cd busybox-1.32.1 && \
+      make defconfig && \
+      sed -i 's/.*CONFIG_STATIC.*/CONFIG_STATIC=y/' .config && \
+      make -j$(nproc) && \
+      make install && \
+      mv _install /tmp/rootfs && \
+      cd /build && \
+      rm -rf busybox-1.32.1
 
-# Download the ubuntu rootfs, which we'll use as a chroot for all our tests
-# This is only needed to provide /lib/* and /usr/lib/*
+# Download the ubuntu rootfs, which we'll use as a chroot for all our tests.
 WORKDIR /tmp
-RUN debootstrap --variant=minbase --arch=riscv64 --foreign focal /tmp/rootfs/ubuntu
-RUN cd rootfs && mkdir proc sys dev etc etc/init.d
-# rootfs/ubuntu/proc is in a weird state (access fails with ELOOP) until
-# rootfs/ubuntu/debootstrap/debootstrap --second-stage is run (under emulation),
-# but this takes ages. Instead hack it into a good enough state.
-# /proc is used by std::env::current_exe() (which is roughly
-# `readlink /proc/self/exe`)
-RUN cd rootfs/ubuntu && rm -rf proc && mkdir proc
+RUN mkdir rootfs/ubuntu
+RUN curl https://cdimage.ubuntu.com/ubuntu-base/releases/22.04/release/ubuntu-base-22.04.2-base-riscv64.tar.gz | \
+      tar xzf - -C rootfs/ubuntu && \
+      cd rootfs && mkdir proc sys dev etc etc/init.d
 
 # Copy over our init script, which starts up our test server and also a few other
 # misc tasks
@@ -95,9 +85,6 @@ RUN mkdir build && cd build && \
 WORKDIR /tmp
 RUN rm -rf /tmp/riscv-pk
 
-COPY scripts/cmake.sh /scripts/
-RUN /scripts/cmake.sh
-
 COPY scripts/sccache.sh /scripts/
 RUN sh /scripts/sccache.sh