[Compile error] target: armv7-unknown-linux-musleabi

[IceCodeNew]

在 Ubuntu docker image 上对 arm 平台做交叉编译的时候遇到了无法编译 socket2 的错误：

Installing shadowsocks-rust v1.10.0 (https://github.com/shadowsocks/shadowsocks-rust.git#fd926bb8)
...

Compiling socket2 v0.3.19
Running `rustc --crate-name socket2 --edition=2018 /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/socket2-0.3.19/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C panic=abort -C codegen-units=1 -C metadata=9516879405a31528 -C extra-filename=-9516879405a31528 --out-dir /tmp/cargo-installQyepjN/armv7-unknown-linux-musleabi/release/deps --target armv7-unknown-linux-musleabi -C linker=armv6-linux-musleabi-gcc -L dependency=/tmp/cargo-installQyepjN/armv7-unknown-linux-musleabi/release/deps -L dependency=/tmp/cargo-installQyepjN/release/deps --extern cfg_if=/tmp/cargo-installQyepjN/armv7-unknown-linux-musleabi/release/deps/libcfg_if-a21588f9f01fd146.rmeta --extern libc=/tmp/cargo-installQyepjN/armv7-unknown-linux-musleabi/release/deps/liblibc-2305531b0b6bff17.rmeta --cap-lints allow -C relocation-model=pic -C prefer-dynamic=off -C target-feature=+crt-static,-vfp2,-vfp3`
Compiling socket2 v0.4.0
Running `rustc --crate-name socket2 --edition=2018 /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/socket2-0.4.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C panic=abort -C linker-plugin-lto -C codegen-units=1 --cfg 'feature="all"' -C metadata=4b78b189cd4beac3 -C extra-filename=-4b78b189cd4beac3 --out-dir /tmp/cargo-installQyepjN/armv7-unknown-linux-musleabi/release/deps --target armv7-unknown-linux-musleabi -C linker=armv6-linux-musleabi-gcc -L dependency=/tmp/cargo-installQyepjN/armv7-unknown-linux-musleabi/release/deps -L dependency=/tmp/cargo-installQyepjN/release/deps --extern libc=/tmp/cargo-installQyepjN/armv7-unknown-linux-musleabi/release/deps/liblibc-2305531b0b6bff17.rmeta --cap-lints allow -C relocation-model=pic -C prefer-dynamic=off -C target-feature=+crt-static,-vfp2,-vfp3`
error[E0425]: cannot find value `SO_INCOMING_CPU` in crate `libc` --> /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/socket2-0.4.0/src/sys/unix.rs:1201:69 | 1201 | getsockopt::<c_int>(self.inner, libc::SOL_SOCKET, libc::SO_INCOMING_CPU) | ^^^^^^^^^^^^^^^ not found in `libc`
error[E0425]: cannot find value `SO_INCOMING_CPU` in crate `libc` --> /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/socket2-0.4.0/src/sys/unix.rs:1217:23 | 1217 | libc::SO_INCOMING_CPU, | ^^^^^^^^^^^^^^^ not found in `libc`
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0425`.
error: could not compile `socket2` Caused by:
process didn't exit successfully: `rustc --crate-name socket2 --edition=2018 /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/socket2-0.4.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C panic=abort -C linker-plugin-lto -C codegen-units=1 --cfg 'feature="all"' -C metadata=4b78b189cd4beac3 -C extra-filename=-4b78b189cd4beac3 --out-dir /tmp/cargo-installQyepjN/armv7-unknown-linux-musleabi/release/deps --target armv7-unknown-linux-musleabi -C linker=armv6-linux-musleabi-gcc -L dependency=/tmp/cargo-installQyepjN/armv7-unknown-linux-musleabi/release/deps -L dependency=/tmp/cargo-installQyepjN/release/deps --extern libc=/tmp/cargo-installQyepjN/armv7-unknown-linux-musleabi/release/deps/liblibc-2305531b0b6bff17.rmeta --cap-lints allow -C relocation-model=pic -C prefer-dynamic=off -C target-feature=+crt-static,-vfp2,-vfp3` (exit code: 1) warning: build failed, waiting for other jobs to finish...
error
:

failed to compile `shadowsocks-rust v1.10.0 (https://github.com/shadowsocks/shadowsocks-rust.git#fd926bb8)`, intermediate artifacts can be found at `/tmp/cargo-installQyepjN`

Caused by:
build failed

---

编译环境和命令可通过如下 Dockerfile 复现。

FROM quay.io/icecodenew/rust-collection:build_base_ubuntu AS shadowsocks-rust
SHELL ["/bin/bash", "-o", "pipefail", "-c"]
# https://api.github.com/repos/shadowsocks/shadowsocks-rust/commits?per_page=1
ARG shadowsocks_rust_latest_commit_hash='fd926bb8d7c8b775583d2497961437b6d9801790'
WORKDIR /usr/local/cargo/bin
RUN unset LDFLAGS CXXFLAGS CFLAGS \
    && source '/root/.bashrc' \
    && export LDFLAGS="-fuse-ld=lld -s" \
    && env \
    && RUSTFLAGS="-C relocation-model=pic -C prefer-dynamic=off -C target-feature=+crt-static,-vfp2,-vfp3" cargo +nightly install --bins -j "$(nproc)" --target armv7-unknown-linux-musleabi --no-default-features --features "logging trust-dns dns-over-tls dns-over-https local utility local-dns local-http local-tunnel local-socks4 multi-threaded local-redir" --git 'https://github.com/shadowsocks/shadowsocks-rust.git' --tag "$shadowsocks_rust_latest_commit_hash" --verbose \
    && armv6-linux-musleabi-strip ./sslocal ./ssurl \
    && bsdtar --no-xattrs -a -cf ss-rust-linux-arm-musleabi5-x32.tar.gz ./sslocal ./ssurl \
    && rm -f ./sslocal ./ssurl

[zonyitoo]

error[E0425]: cannot find value `SO_INCOMING_CPU` in crate `libc` --> /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/socket2-0.4.0/src/sys/unix.rs:1201:69 | 1201 | getsockopt::<c_int>(self.inner, libc::SOL_SOCKET, libc::SO_INCOMING_CPU) | ^^^^^^^^^^^^^^^ not found in `libc`

You probably should make an issue to libc about adding definition of SO_INCOMING_CPU.

They have defined this variable in aarch64, but not in arm.

[zonyitoo]

@IceCodeNew Please verify if it is fixed.