fix: musl builds (#1937)

Author: jtguibas

.github/workflows/release.yml

@@ -147,18 +147,31 @@ jobs:
           echo "SDKROOT=$(xcrun -sdk macosx --show-sdk-path)" >> $GITHUB_ENV
           echo "MACOSX_DEPLOYMENT_TARGET=$(xcrun -sdk macosx --show-sdk-platform-version)" >> $GITHUB_ENV
 
-      - name: Linux ARM setup
-        if: matrix.target == 'aarch64-unknown-linux-musl'
+      - name: Musl setup (x86_64)
+        if: matrix.target == 'x86_64-unknown-linux-musl'
         run: |
           sudo apt-get update -y
-          sudo apt-get install -y gcc-aarch64-linux-gnu
-          echo "CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc" >> $GITHUB_ENV
+          sudo apt-get install -y clang musl-tools musl-dev
+
+          # g++ supports musl
+          sudo ln -s /usr/bin/g++ /usr/bin/musl-g++
+
+          rustup target add ${{ matrix.target }}
 
-      - name: Musl setup
-        if: contains(matrix.target, 'musl')
+      - name: Musl setup (aarch64)
+        if: matrix.target == 'aarch64-unknown-linux-musl'
         run: |
           sudo apt-get update -y
-          sudo apt-get install -y musl-tools musl-dev
+          sudo apt-get install -y clang musl-tools musl-dev gcc-aarch64-linux-gnu
+
+          # g++ supports musl
+          sudo ln -s /usr/bin/g++ /usr/bin/musl-g++
+
+          # cc-rs uses the wrong defaults for this target so we override them.
+          echo "CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_LINKER=aarch64-linux-gnu-gcc" >> $GITHUB_ENV
+          echo "CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc" >> $GITHUB_ENV
+          echo "CC=aarch64-linux-gnu-gcc" >> $GITHUB_ENV
+          
           rustup target add ${{ matrix.target }}
 
       - name: Build binaries