Moved Linux ARM64 compilation to native builder

- Docker ends up being really slow for cross compilation and we should
  be able to do it as a cross compilation step from x64

Author: daniellockyer

.github/workflows/ci.yml

@@ -26,6 +26,7 @@ jobs:
           - x64
         target:
           - x64
+          - arm64
         node:
           - 18
         include:
@@ -82,6 +83,20 @@ jobs:
           echo "CFLAGS=${CFLAGS:-} -include ../src/gcc-preinclude.h" >> $GITHUB_ENV
           echo "CXXFLAGS=${CXXFLAGS:-} -include ../src/gcc-preinclude.h" >> $GITHUB_ENV
 
+      - name: Setup cross compilation for Linux ARM64
+        if: contains(matrix.os, 'ubuntu') && matrix.target == 'arm64'
+        run: |
+          sudo apt-get install -y gcc-aarch64-linux-gnu g++-aarch64-linux-gnu binutils-aarch64-linux-gnu
+          echo "AS=aarch64-linux-gnu-as" >> $GITHUB_ENV
+          echo "STRIP=aarch64-linux-gnu-strip" >> $GITHUB_ENV
+          echo "AR=aarch64-linux-gnu-ar" >> $GITHUB_ENV
+          echo "CC=aarch64-linux-gnu-gcc" >> $GITHUB_ENV
+          echo "CPP=aarch64-linux-gnu-cpp" >> $GITHUB_ENV
+          echo "CXX=aarch64-linux-gnu-g++" >> $GITHUB_ENV
+          echo "LD=aarch64-linux-gnu-ld" >> $GITHUB_ENV
+          echo "FC=aarch64-linux-gnu-gfortran" >> $GITHUB_ENV
+          echo "PKG_CONFIG_PATH=/usr/lib/aarch64-linux-gnu/pkgconfig" >> $GITHUB_ENV
+
       - name: Build binaries
         run: yarn prebuild -a ${{ env.TARGET }}
 
@@ -120,7 +135,6 @@ jobs:
         target:
           - linux/arm64
         variant:
-          - bullseye
           - alpine3.15
         include:
           # musl x64 builds