musl libc builds (docker)

.github/workflows/ci.yml

@@ -121,7 +121,7 @@ jobs:
           key:
             cargo-${{ matrix.config.target }}-${{ matrix.config.variant }}-${{ hashFiles('Cargo.lock', 'build.rs', 'git_submodule_status.txt') }}
           restore-keys:
-            cargo-${{ matrix.config.target }}-${{ matrix.config.variant }}-
+            cargo-${{ matrix.config.target }}-${{ matrix.config.variant }}-1
 
         # It seems that the 'target' directory does not always get restored
         # from cache correctly on MacOS. In the build log we see the following:
@@ -164,6 +164,13 @@ jobs:
           . $basename/sccache --start-server
           echo "$(pwd)/$basename" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
 
+      - name: Build Musl
+        if: matrix.config.target == 'x86_64-unknown-linux-gnu'
+        run: |
+          docker run -v "$PWD":/usr/src/rusty_v8 -w /usr/src/rusty_v8 rust:alpine3.16 ./musl-build.sh ${{ env.CARGO_VARIANT_FLAG }}
+          docker cp $(docker ps -lq):/usr/src/rusty_v8/target/${{ matrix.config.variant }}/gn_out/obj/librusty_v8.a target/librusty_v8_${{ matrix.config.variant }}_x86_64-unknown-linux-musl.a
+          sudo chown $(id -u):$(id -g) /home/runner/work/rusty_v8/rusty_v8/target/debug/
+
       - name: Test
         env:
           SCCACHE_IDLE_TIMEOUT: 0

musl-build.sh

@@ -0,0 +1,35 @@
+#!/bin/sh
+
+apk add git \
+    gcc \
+    ninja \
+    python3 \
+    clang \
+    g++ \
+    pkgconfig \
+    glib-dev \
+    llvm13-dev \
+    binutils-gold \
+    sccache
+ln -s /usr/bin/python3 /usr/bin/python
+
+export V8_FROM_SOURCE="yes"
+export CLANG_BASE_PATH="/usr"
+export SCCACHE_DIR="./target/sccache"
+export SCCACHE="/usr/bin/sccache"
+export GN_ARGS="use_custom_libcxx=false use_lld=false v8_enable_backtrace=false v8_enable_debugging_features=false"
+GN="$(pwd)/gn/out/gn"
+export GN
+
+# Bulid GN
+if [ ! -d "./gn" ]; then
+    git clone https://gn.googlesource.com/gn
+    (
+        cd gn || exit
+        python3 build/gen.py
+        ninja -C out
+    )
+fi
+
+# Build rusty_v8 and pass through the arguments
+cargo build -vv $@