fix: added musl builds x86_64 and aarch64 (#2259)

* fix: added musl builds x86_64 and aarch64

Signed-off-by: Thomas Timmer <thomastimmer11@hotmail.com>

* feat: copy wasmtime ci docker images

* chore: copy over the correct musl docker image

* fix: rename EXTRA_RUSTFLAGS to RUSTFLAGS

* Revert "fix: rename EXTRA_RUSTFLAGS to RUSTFLAGS"

This reverts commit 9ff1f40.

---------

Signed-off-by: Thomas Timmer <thomastimmer11@hotmail.com>
Co-authored-by: Thomas Timmer <thomas.timmer@bettyblocks.com>

Author: thomas9911

.github/workflows/main.yml

@@ -29,6 +29,9 @@ jobs:
         include:
         - build: x86_64-linux
           os: ubuntu-latest
+        - build: x86_64-musl
+          os: ubuntu-latest
+          target: x86_64-unknown-linux-musl
         - build: x86_64-macos
           os: macos-latest
           target: x86_64-apple-darwin
@@ -40,6 +43,9 @@ jobs:
         - build: aarch64-linux
           os: ubuntu-latest
           target: aarch64-unknown-linux-gnu
+        - build: aarch64-musl
+          os: ubuntu-latest
+          target: aarch64-unknown-linux-musl
         - build: wasm32-wasip1
           os: ubuntu-latest
           target: wasm32-wasip1

ci/docker/aarch64-musl/Dockerfile

@@ -0,0 +1,5 @@
+FROM ghcr.io/cross-rs/aarch64-unknown-linux-musl
+
+RUN apt-get update -y && apt-get install -y ninja-build
+RUN git config --global --add safe.directory '*'
+ENV EXTRA_RUSTFLAGS=-Ctarget-feature=-crt-static

ci/docker/x86_64-musl/Dockerfile

@@ -0,0 +1,16 @@
+# Rust binaries need `libgcc_s.so` but ubuntu's musl toolchain does not have it.
+# Get it from alpine instead.
+FROM alpine:3.16 as libgcc_s_src
+RUN apk add libgcc
+
+# Use something glibc-based for the actual compile because the Rust toolchain
+# we're using is glibc-based in CI.
+FROM ubuntu:24.04
+RUN apt-get update -y && apt-get install -y cmake musl-tools git ninja-build
+COPY --from=libgcc_s_src /usr/lib/libgcc_s.so.1 /usr/lib/x86_64-linux-musl
+RUN git config --global --add safe.directory '*'
+
+# Note that `-crt-feature` is passed here to specifically disable static linking
+# with musl. We want a `*.so` to pop out so static linking isn't what we want.
+ENV EXTRA_RUSTFLAGS=-Ctarget-feature=-crt-static
+ENV CARGO_TARGET_X86_64_UNKNOWN_LINUX_MUSL_LINKER=musl-gcc