fix devtool build for musl on aarch64

Since we are using the --target for builiding,
rustc will consider it a cross compilation. Thus,
on a aarch64 machie will try to look for the
aarch64-linux-musl-gcc binary. Give cargo the
path to musl-gcc in such scenario.

Signed-off-by: Diana Popa <[email protected]>

Author: dianpopa

tools/devtool

@@ -438,6 +438,14 @@ cmd_build() {
     # Cargo uses the debug profile by default. If we're building the release
     # binaries, we need to pass an extra argument to cargo.
     cargo_args=("$@")
+
+    # When musl build is triggered, make sure that cargo finds the path to
+    # the musl-gcc binary.
+    TARGET_CC=""
+    if [[ ${cargo_args[@]} = *"musl"* ]]; then
+        TARGET_CC=/usr/bin/musl-gcc
+    fi
+
     [ $profile = "release" ] && cargo_args+=("--release")
 
     # Run the cargo build process inside the container.
@@ -446,6 +454,7 @@ cmd_build() {
     run_devctr \
         --user "$(id -u):$(id -g)" \
         --workdir "$CTR_FC_ROOT_DIR" \
+        --env TARGET_CC=$TARGET_CC \
         -- \
         cargo build \
             --target-dir "${CTR_CARGO_TARGET_DIR}" \