ci: install musl from source for loongarch64

ci/docker/loongarch64-unknown-linux-musl/Dockerfile

@@ -1,14 +1,16 @@
 FROM ubuntu:24.10
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
- ca-certificates curl gcc git libc6-dev make qemu-user xz-utils
+ ca-certificates curl gcc gcc-14-loongarch64-linux-gnu git libc6-dev \
+ make qemu-user xz-utils patch rsync
 
-COPY install-musl-cross.sh /
-RUN /install-musl-cross.sh loongarch64-unknown-linux-musl
+COPY install-musl.sh /
+RUN /install-musl.sh loongarch64
 
-ENV CARGO_TARGET_LOONGARCH64_UNKNOWN_LINUX_MUSL_LINKER=loongarch64-unknown-linux-musl-gcc \
+ENV CARGO_TARGET_LOONGARCH64_UNKNOWN_LINUX_MUSL_LINKER=musl-gcc \
  CARGO_TARGET_LOONGARCH64_UNKNOWN_LINUX_MUSL_RUNNER="qemu-loongarch64" \
- CC_loongarch64_unknown_linux_musl=loongarch64-unknown-linux-musl-gcc \
+ CC_loongarch64_unknown_linux_musl=musl-gcc \
  CFLAGS_loongarch64_unknown_linux_musl="-mabi=lp64d -fPIC" \
- QEMU_LD_PREFIX=/loongarch64-unknown-linux-musl/loongarch64-unknown-linux-musl/sysroot \
- PATH=$PATH:/loongarch64-unknown-linux-musl/bin:/rust/bin
+ RUSTFLAGS="-Ctarget-feature=+crt-static" \
+ QEMU_LD_PREFIX=/musl-loongarch64 \
+ PATH=$PATH:/musl-loongarch64/bin:/rust/bin

ci/install-musl.sh

@@ -5,7 +5,15 @@
 
 set -eux
 
-musl_version=1.1.24
+case ${1} in
+ loongarch64)
+ musl_version=1.2.5
+ ;;
+ *)
+ musl_version=1.1.24
+ ;;
+esac
+
 musl="musl-${musl_version}"
 
 # Download, configure, build, and install musl:
@@ -53,6 +61,13 @@ case ${1} in
  ./configure --prefix="/musl-${musl_arch}" --enable-wrapper=yes
  make install -j4
  ;;
+ loongarch64)
+ musl_arch=loongarch64
+ kernel_arch=loongarch
+ CC=loongarch64-linux-gnu-gcc-14 \
+ ./configure --prefix="/musl-${musl_arch}" --enable-wrapper=yes
+ make install -j4
+ ;;
  *)
  echo "Unknown target arch: \"${1}\""
  exit 1