support loongarch (#1146)

.github/workflows/core.yml

@@ -102,6 +102,10 @@ jobs:
             OS: ubuntu-22.04
             ARTIFACT_NAME: linux-arm
 
+          - TARGET: loongarch64-unknown-linux-musl
+            OS: ubuntu-24.04
+            ARTIFACT_NAME: linux-loongarch64
+
           - TARGET: x86_64-apple-darwin
             OS: macos-latest
             ARTIFACT_NAME: macos-x86_64
@@ -167,6 +171,11 @@ jobs:
         run: |
           bash ./.github/workflows/install_rust.sh
 
+          # loongarch need llvm-18
+          if [[ $TARGET =~ ^loongarch.*$ ]]; then
+            sudo apt-get install -qq llvm-18 clang-18
+            export LLVM_CONFIG_PATH=/usr/lib/llvm-18/bin/llvm-config
+          fi
           # we set the sysroot when sysroot is a dir
           # this dir is a soft link generated by install_rust.sh
           # kcp-sys need this to gen ffi bindings. without this clang may fail to find some libc headers such as bits/libc-header-start.h
@@ -246,7 +255,7 @@ jobs:
             TAG=$GITHUB_SHA
           fi
 
-          if [[ $OS =~ ^ubuntu.*$ && ! $TARGET =~ ^.*freebsd$ ]]; then
+          if [[ $OS =~ ^ubuntu.*$ && ! $TARGET =~ ^.*freebsd$ && ! $TARGET =~ ^loongarch.*$ ]]; then
             UPX_VERSION=4.2.4
             curl -L https://github.com/upx/upx/releases/download/v${UPX_VERSION}/upx-${UPX_VERSION}-amd64_linux.tar.xz -s | tar xJvf -
             cp upx-${UPX_VERSION}-amd64_linux/upx .