Add armv7-unknown-linux-musleabihf host tools to CI

Author: alex

src/ci/docker/host-x86_64/dist-armv7-linux-musl/Dockerfile

@@ -0,0 +1,37 @@
+FROM ubuntu:22.04
+
+COPY scripts/cross-apt-packages.sh /scripts/
+RUN sh /scripts/cross-apt-packages.sh
+
+COPY scripts/crosstool-ng.sh /scripts/
+RUN sh /scripts/crosstool-ng.sh
+
+COPY scripts/rustbuild-setup.sh /scripts/
+RUN sh /scripts/rustbuild-setup.sh
+WORKDIR /tmp
+
+COPY scripts/crosstool-ng-build.sh /scripts/
+COPY host-x86_64/dist-armv7-linux-musl/armv7-unknown-linux-musleabihf.defconfig /tmp/crosstool.defconfig
+RUN /scripts/crosstool-ng-build.sh
+
+COPY scripts/sccache.sh /scripts/
+RUN sh /scripts/sccache.sh
+
+ENV PATH=$PATH:/x-tools/armv7-unknown-linux-musleabihf/bin
+
+ENV CC_armv7_unknown_linux_musleabihf=armv7-unknown-linux-musleabihf-gcc \
+    AR_armv7_unknown_linux_musleabihf=armv7-unknown-linux-musleabihf-ar \
+    CXX_armv7_unknown_linux_musleabihf=armv7-unknown-linux-musleabihf-g++
+
+ENV HOSTS=armv7-unknown-linux-musleabihf
+
+ENV RUST_CONFIGURE_ARGS \
+      --enable-extended \
+      --enable-full-tools \
+      --enable-profiler \
+      --enable-sanitizers \
+      --disable-docs \
+      --set target.armv7-unknown-linux-musleabihf.crt-static=false \
+      --musl-root-armv7hf=/x-tools/armv7-unknown-linux-musleabihf/armv7-unknown-linux-musleabihf/sysroot/usr
+
+ENV SCRIPT python3 ../x.py dist --host $HOSTS --target $HOSTS

src/ci/docker/host-x86_64/dist-armv7-linux-musl/armv7-unknown-linux-musleabihf.defconfig

@@ -0,0 +1,16 @@
+CT_CONFIG_VERSION="4"
+CT_PREFIX_DIR="/x-tools/${CT_TARGET}"
+CT_USE_MIRROR=y
+CT_MIRROR_BASE_URL="https://ci-mirrors.rust-lang.org/rustc"
+CT_ARCH_ARM=y
+CT_ARCH_ARCH="armv7-a"
+CT_ARCH_FPU="vfpv3-d16"
+CT_ARCH_FLOAT_HW=y
+CT_TARGET_VENDOR="unknown"
+CT_KERNEL_LINUX=y
+CT_LINUX_V_4_20=y
+CT_BINUTILS_V_2_32=y
+CT_LIBC_MUSL=y
+CT_MUSL_V_1_2=y
+CT_GCC_V_8=y
+CT_CC_LANG_CXX=y

src/ci/github-actions/jobs.yml

@@ -198,6 +198,9 @@ auto:
   - name: dist-armv7-linux
     <<: *job-linux-4c
 
+  - name: dist-armv7-linux-musl
+    <<: *job-linux-4c
+
   - name: dist-i586-gnu-i586-i686-musl
     <<: *job-linux-4c