Add linux-loongarch64 images

src/azurelinux/3.0/net10.0/cross/loongarch64-musl/Dockerfile

@@ -0,0 +1,36 @@
+ARG ROOTFS_DIR=/crossrootfs/loongarch64
+
+FROM mcr.microsoft.com/dotnet-buildtools/prereqs:azurelinux-3.0-net10.0-crossdeps-builder-amd64 AS builder
+ARG ROOTFS_DIR
+
+RUN /scripts/eng/common/cross/build-rootfs.sh loongarch64 alpine3.20 --skipunmount
+
+RUN TARGET_TRIPLE="loongarch64-alpine-linux-musl" && \
+    cmake -S llvm-project.src/runtimes -B runtimes \
+        -DCMAKE_BUILD_TYPE=Release \
+        -DCMAKE_ASM_COMPILER=clang \
+        -DCMAKE_C_COMPILER=clang \
+        -DCMAKE_CXX_COMPILER=clang++ \
+        -DCMAKE_ASM_COMPILER_TARGET="$TARGET_TRIPLE" \
+        -DCMAKE_C_COMPILER_TARGET="$TARGET_TRIPLE" \
+        -DCMAKE_CXX_COMPILER_TARGET="$TARGET_TRIPLE" \
+        # We're going to link the static libraries we build here into PIC images, so build the static libraries as PIC.
+        -DCMAKE_POSITION_INDEPENDENT_CODE=ON \
+        -DCMAKE_SYSROOT="$ROOTFS_DIR" \
+        # Specify linker to use for exes directly for CMake toolchain detection
+        -DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld" \
+        # Don't search for tools in the sysroot as we're cross-compiling
+        -DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM="NEVER" \
+        -DLLVM_USE_LINKER=lld \
+        -DLLVM_ENABLE_RUNTIMES="libcxx" \
+        -DLIBCXX_ENABLE_SHARED=OFF \
+        -DLIBCXX_HAS_MUSL_LIBC=ON \
+        -DLIBCXX_CXX_ABI=libstdc++ \
+        -DLIBCXX_CXX_ABI_INCLUDE_PATHS="$ROOTFS_DIR/usr/include/c++/14.2.0/;$ROOTFS_DIR/usr/include/c++/14.2.0/$TARGET_TRIPLE" && \
+    cmake --build runtimes -j $(getconf _NPROCESSORS_ONLN) && \
+    cmake --install runtimes --prefix "$ROOTFS_DIR/usr"
+
+FROM mcr.microsoft.com/dotnet-buildtools/prereqs:azurelinux-3.0-net10.0-crossdeps-llvm-amd64
+ARG ROOTFS_DIR
+
+COPY --from=builder $ROOTFS_DIR $ROOTFS_DIR

src/azurelinux/3.0/net10.0/cross/loongarch64/Dockerfile

@@ -0,0 +1,57 @@
+ARG ROOTFS_DIR=/crossrootfs/loongarch64
+
+FROM mcr.microsoft.com/dotnet-buildtools/prereqs:azurelinux-3.0-net10.0-crossdeps-builder-amd64 AS builder
+ARG ROOTFS_DIR
+
+# Install the latest debootstrap
+RUN tdnf remove -y debootstrap && \
+    curl -fsL -o debootstrap.tar.gz https://deb.debian.org/debian/pool/main/d/debootstrap/debootstrap_1.0.138.tar.gz && \
+    echo "e8e8b72388b6e5ced65d1b5e69ce0b9e13f4813da0c328a52add57ee5f79430a debootstrap.tar.gz" | sha256sum -c - && \
+    tar xzf debootstrap.tar.gz -C / && \
+    ln -s /debootstrap/debootstrap -t /usr/local/bin && \
+    rm -f debootstrap.tar.gz
+
+# temp
+RUN rm -rf /scripts && git clone --depth 1 --single-branch https://github.com/am11/arcade -b patch-14 /scripts
+
+RUN /scripts/eng/common/cross/build-rootfs.sh loongarch64 sid --skipunmount --skipsigcheck
+
+RUN TARGET_TRIPLE="loongarch64-linux-gnu" && \
+    CLANG_MAJOR_VERSION=$(clang --version | grep -oP "(?<=version )\d+") && \
+    cmake -S llvm-project.src/runtimes -B runtimes \
+        -DCMAKE_BUILD_TYPE=Release \
+        -DCMAKE_ASM_COMPILER=clang \
+        -DCMAKE_C_COMPILER=clang \
+        -DCMAKE_CXX_COMPILER=clang++ \
+        -DCMAKE_ASM_COMPILER_TARGET="$TARGET_TRIPLE" \
+        -DCMAKE_C_COMPILER_TARGET="$TARGET_TRIPLE" \
+        -DCMAKE_CXX_COMPILER_TARGET="$TARGET_TRIPLE" \
+        # We're going to link the static libraries we build here into PIC images, so build the static libraries as PIC.
+        -DCMAKE_POSITION_INDEPENDENT_CODE=ON \
+        -DCMAKE_SYSROOT="$ROOTFS_DIR" \
+        # Specify linker to use for exes directly for CMake toolchain detection
+        -DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld" \
+        # Don't search for tools in the sysroot as we're cross-compiling
+        -DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM="NEVER" \
+        -DLLVM_USE_LINKER=lld \
+        -DLLVM_ENABLE_RUNTIMES="libcxx;compiler-rt" \
+        -DLIBCXX_ENABLE_SHARED=OFF \
+        -DLIBCXX_CXX_ABI=libstdc++ \
+        -DLIBCXX_CXX_ABI_INCLUDE_PATHS="$ROOTFS_DIR/usr/include/c++/13/;$ROOTFS_DIR/usr/include/$TARGET_TRIPLE" \
+        -DCOMPILER_RT_CXX_LIBRARY="libcxx" \
+        -DCOMPILER_RT_STATIC_CXX_LIBRARY=ON \
+        -DCOMPILER_RT_BUILD_SANITIZERS=OFF \ 
+        -DCOMPILER_RT_BUILD_MEMPROF=OFF \
+        # The libfuzzer build in LLVM doesn't correctly forward the required CMake properties to the "fuzzed libc++" build
+        # so skip it here.
+        -DCOMPILER_RT_BUILD_LIBFUZZER=OFF \
+        -DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON \
+        -DCOMPILER_RT_INSTALL_PATH="/usr/local/lib/clang/$CLANG_MAJOR_VERSION" && \
+    cmake --build runtimes -j $(getconf _NPROCESSORS_ONLN) && \
+    cmake --install runtimes --prefix "$ROOTFS_DIR/usr"
+
+FROM mcr.microsoft.com/dotnet-buildtools/prereqs:azurelinux-3.0-net10.0-crossdeps-llvm-amd64
+ARG ROOTFS_DIR
+
+COPY --from=builder /usr/local/lib/clang /usr/local/lib/clang/
+COPY --from=builder $ROOTFS_DIR $ROOTFS_DIR

src/azurelinux/manifest.json

@@ -650,6 +650,29 @@
             }
           ]
         },
+        {
+          "platforms": [
+            {
+              "dockerfile": "src/azurelinux/3.0/net10.0/cross/loongarch64",
+              "os": "linux",
+              "osVersion": "azurelinux3.0",
+              "tags": {
+                "azurelinux-3.0-net10.0-cross-loongarch64": {}
+              }
+            }
+          ]
+        },        {
+          "platforms": [
+            {
+              "dockerfile": "src/azurelinux/3.0/net10.0/cross/loongarch64-musl",
+              "os": "linux",
+              "osVersion": "azurelinux3.0",
+              "tags": {
+                "azurelinux-3.0-net10.0-cross-loongarch64-musl": {}
+              }
+            }
+          ]
+        },
         {
           "platforms": [
             {

src/ubuntu/build-scripts/install-cross-build-prereqs.sh

@@ -5,13 +5,22 @@ set -e
 # Stop script if unbound variable found (use ${var:-} if intentional)
 set -u
 
-# we need to make sure that we install binfmt >= 2.2.0 and qemu-user-static >= 1.4.2,
-# which are available in Ubuntu 20.04+ repositories
+# we need to use ubuntu repo for new architectures like qemu-loongarch64-static which are not available in microsoft sources
+
+# backup and create single source for this distro
+find /etc/apt
+sudo mv /etc/apt/sources.list.d{,_}
+sudo mkdir /etc/apt/sources.list.d
+
 . /etc/os-release
-if [ "$(echo "$VERSION_ID" | tr -d .)" -lt 2004 ]; then
-    sed "s/$UBUNTU_CODENAME/focal/g" /etc/apt/sources.list | sudo dd of=/etc/apt/sources.list.d/focal.list
-fi
+sudo tee "/etc/apt/sources.list.d/ubuntu.sources" > /dev/null <<EOF
+Types: deb
+URIs: http://archive.ubuntu.com/ubuntu
+Suites: ${UBUNTU_CODENAME} ${UBUNTU_CODENAME}-updates ${UBUNTU_CODENAME}-security
+Components: main restricted universe multiverse
+EOF
 
+# Function to install necessary packages
 function installPkgs {
     sudo apt-get update
     # see (see https://github.com/dotnet/dotnet-buildtools-prereqs-docker/issues/120)
@@ -34,3 +43,31 @@ until installPkgs; do
         exit 1
     fi
 done
+
+# restore the original sources
+sudo rm -rf /etc/apt/sources.list.d
+sudo mv /etc/apt/sources.list.d{_,}
+
+docker version
+docker info
+echo testing
+ls /proc/sys/fs/binfmt_misc
+echo testing---1
+ls /usr/bin/qemu*
+echo testing---2
+qemu-riscv64-static --version
+echo cat binfmt
+cat /proc/sys/fs/binfmt_misc/status
+echo testing0
+for entry in /proc/sys/fs/binfmt_misc/*; do
+    if [[ $(basename "$entry") != "status" && $(basename "$entry") != "register" ]]; then
+        echo "=== $(basename "$entry") ==="
+        cat "$entry"
+        echo
+    fi
+done
+echo testing---z
+docker run --rm --privileged --pid=host debian nsenter -t 1 -m -u -n -i ls /proc/sys/fs/binfmt_misc
+docker run --rm --privileged --pid=host debian nsenter -t 1 -m -u -n -i sh -c 'ls /usr/bin/qemu*'
+docker run --rm --privileged --pid=host debian nsenter -t 1 -m -u -n -i qemu-riscv64-static --version
+docker run --rm --privileged --pid=host debian nsenter -t 1 -m -u -n -i qemu-loongarch64-static --version