add musl build

Author: ije

.github/workflows/release.yml

@@ -4,10 +4,13 @@ on:
   push:
     tags:
       - "v*.*.*"
+  pull_request:
+    branches: [ "main" ]
 
 env:
   CARGO_TERM_COLOR: always
   CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER: aarch64-linux-gnu-gcc
+  CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_LINKER: aarch64-linux-musl-gcc
   MACOSX_DEPLOYMENT_TARGET: '10.13'
 
 jobs:
@@ -26,6 +29,10 @@ jobs:
             target: aarch64-unknown-linux-gnu
           - os: ubuntu-latest
             target: x86_64-unknown-linux-gnu
+          - os: ubuntu-latest
+            target: aarch64-unknown-linux-musl
+          - os: ubuntu-latest
+            target: x86_64-unknown-linux-musl
 
     steps:
       - name: Checkout
@@ -41,7 +48,7 @@ jobs:
           key: ${{ matrix.target }}
 
       - name: Install gcc-aarch64-linux-gnu
-        if: matrix.os == 'ubuntu-latest' && matrix.target == 'aarch64-unknown-linux-gnu'
+        if: matrix.target == 'aarch64-unknown-linux-gnu' || matrix.target == 'aarch64-unknown-linux-musl'
         run: |
           sudo apt-get update
           sudo apt-get install -y gcc-aarch64-linux-gnu