Auto merge of #126891 - matthiaskrgr:rollup-p6dl1gk, r=matthiaskrgr

Rollup of 9 pull requests

Successful merges:

 - #126177 (Add hard error and migration lint for unsafe attrs)
 - #126298 (Promote loongarch64-unknown-linux-musl to Tier 2 with host tools)
 - #126455 (For [E0308]: mismatched types, when expr is in an arm's body, not add semicolon ';' at the end of it.)
 - #126754 (Implement `use<>` formatting in rustfmt)
 - #126807 (std::unix::fs: copy simplification for apple.)
 - #126845 (Weekly `cargo update`)
 - #126849 (Fix 32-bit Arm reg classes by hierarchically sorting them)
 - #126854 (std::unix::os::home_dir: fallback's optimisation.)
 - #126888 (Remove stray println from rustfmt's `rewrite_static`)

r? `@ghost`
`@rustbot` modify labels: rollup

4 files changed, 83 insertions, 0 deletions

diff --git a/src/ci/docker/README.md b/src/ci/docker/README.md
index 824c904e17f..985e3b37422 100644
--- a/src/ci/docker/README.md
+++ b/src/ci/docker/README.md
@@ -271,6 +271,22 @@ For targets: `loongarch64-unknown-linux-gnu`
 - C compiler > gcc version = 13.2.0
 - C compiler > C++ = ENABLE -- to cross compile LLVM
 
+### `loongarch64-linux-musl.defconfig`
+
+For targets: `loongarch64-unknown-linux-musl`
+
+- 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
+- Target options > Target Architecture = loongarch
+- Target options > Bitness = 64-bit
+- Operating System > Target OS = linux
+- Operating System > Linux kernel version = 5.19.16
+- Binary utilities > Version of binutils = 2.41
+- C-library > musl version = 1.2.5
+- C compiler > gcc version = 13.2.0
+- C compiler > C++ = ENABLE -- to cross compile LLVM
+
 ### `mips-linux-gnu.defconfig`
 
 For targets: `mips-unknown-linux-gnu`
diff --git a/src/ci/docker/host-x86_64/dist-loongarch64-musl/Dockerfile b/src/ci/docker/host-x86_64/dist-loongarch64-musl/Dockerfile
new file mode 100644
index 00000000000..560adf971ba
--- /dev/null
+++ b/src/ci/docker/host-x86_64/dist-loongarch64-musl/Dockerfile
@@ -0,0 +1,35 @@
+FROM ubuntu:22.04
+
+COPY scripts/cross-apt-packages.sh /scripts/
+RUN sh /scripts/cross-apt-packages.sh
+
+COPY scripts/crosstool-ng-git.sh /scripts/
+RUN sh /scripts/crosstool-ng-git.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-loongarch64-musl/loongarch64-unknown-linux-musl.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/loongarch64-unknown-linux-musl/bin
+
+ENV CC_loongarch64_unknown_linux_musl=loongarch64-unknown-linux-musl-gcc \
+    AR_loongarch64_unknown_linux_musl=loongarch64-unknown-linux-musl-ar \
+    CXX_loongarch64_unknown_linux_musl=loongarch64-unknown-linux-musl-g++
+
+ENV HOSTS=loongarch64-unknown-linux-musl
+
+ENV RUST_CONFIGURE_ARGS \
+      --enable-extended \
+      --enable-lld \
+      --disable-docs \
+      --set target.loongarch64-unknown-linux-musl.crt-static=false \
+      --musl-root-loongarch64=/x-tools/loongarch64-unknown-linux-musl/loongarch64-unknown-linux-musl/sysroot/usr
+
+ENV SCRIPT python3 ../x.py dist --host $HOSTS --target $HOSTS
diff --git a/src/ci/docker/host-x86_64/dist-loongarch64-musl/loongarch64-unknown-linux-musl.defconfig b/src/ci/docker/host-x86_64/dist-loongarch64-musl/loongarch64-unknown-linux-musl.defconfig
new file mode 100644
index 00000000000..3ab676ed971
--- /dev/null
+++ b/src/ci/docker/host-x86_64/dist-loongarch64-musl/loongarch64-unknown-linux-musl.defconfig
@@ -0,0 +1,15 @@
+CT_CONFIG_VERSION="4"
+CT_EXPERIMENTAL=y
+CT_PREFIX_DIR="/x-tools/${CT_TARGET}"
+CT_USE_MIRROR=y
+CT_MIRROR_BASE_URL="https://ci-mirrors.rust-lang.org/rustc"
+CT_ARCH_LOONGARCH=y
+# CT_DEMULTILIB is not set
+CT_ARCH_USE_MMU=y
+CT_ARCH_ARCH="loongarch64"
+CT_KERNEL_LINUX=y
+CT_LINUX_V_5_19=y
+CT_LIBC_MUSL=y
+CT_CC_GCC_ENABLE_DEFAULT_PIE=y
+CT_CC_LANG_CXX=y
+CT_GETTEXT_NEEDED=y
diff --git a/src/ci/docker/scripts/crosstool-ng-git.sh b/src/ci/docker/scripts/crosstool-ng-git.sh
new file mode 100644
index 00000000000..2a10e262df8
--- /dev/null
+++ b/src/ci/docker/scripts/crosstool-ng-git.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+set -ex
+
+URL=https://github.com/crosstool-ng/crosstool-ng
+REV=c64500d94be92ed1bcdfdef911048a14e216a5e1
+
+mkdir crosstool-ng
+cd crosstool-ng
+git init
+git fetch --depth=1 ${URL} ${REV}
+git reset --hard FETCH_HEAD
+./bootstrap
+./configure --prefix=/usr/local
+make -j$(nproc)
+make install
+cd ..
+rm -rf crosstool-ng