set CC and linker when cross-compiling for linux

I thought just setting the target would do this but it was still calling the system linker...

Author: zawata

.github/workflows/release.yaml

@@ -46,6 +46,14 @@ jobs:
           targets: ${{ steps.get_target.outputs.target_name }}
 
       - name: Building
+        if: runner.os == 'Linux' && matrix.arch == 'arm64'
+        env:
+          npm_config_arch: ${{ matrix.arch }}
+          CC: aarch64-linux-gnu-gcc
+        run: pnpm install
+
+      - name: Building
+        if: ${{ !(runner.os == 'Linux' && matrix.arch == 'arm64') }}
         env:
           npm_config_arch: ${{ matrix.arch }}
         run: pnpm install

build.js

@@ -16,13 +16,20 @@ const { spawn, buildPaths, exists } = require('./shared');
     await fs.mkdir(buildPaths.bin, { recursive: true });
   }
 
+  const customLinkerFlags = process.env.CC
+    ? ['--config', `target.${getRustTarget()}.linker="${process.env.CC}"`]
+    : [];
+
   await spawn('cargo', [
     'build',
     `--target=${getRustTarget()}`,
+    ...customLinkerFlags,
     `--manifest-path=${path.join(buildPaths.submodule, 'Cargo.toml')}`,
     `--target-dir=${buildPaths.build}`,
     '--release'
-  ]);
+  ], {
+    env: process.env,
+  });
 
   await fs.copyFile(
     buildPaths.exeOut,