unable to find Static system library 'gcc_eh'

[serjflint]

Zig Version

0.11.0

Steps to Reproduce and Observed Behavior

Hi! I am trying to statically cross-compile Ruff from Linux to Linux-ARM (aarch64-unknown-linux-gnu). At the linking stage with command

TARGET=aarch64-unknown-linux-gnu
PKG_CONFIG_ALLOW_CROSS=1 cargo zigbuild --release --target=$TARGET --verbose

I get an error

error: linking with `/home/sandbox/.cache/cargo-zigbuild/0.17.3/zigcc-aarch64-unknown-linux-gnu.sh` failed: exit status: 1
  |
  = note: LC_ALL="C" PATH="/usr/local/rustup/toolchains/1.72-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/bin:/tmp/cargo/bin:/opt/zig:/usr/local/cargo/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/Berkanavt/bin/scripts" VSLANG="1033" "/home/sandbox/.cache/cargo-zigbuild/0.17.3/zigcc-aarch64-unknown-linux-gnu.sh" "/tmp/rustcGyi8cX/symbols.o" "/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/ruff_python_formatter-d5103041bb61df09.ruff_python_formatter.28e285a93788288c-cgu.0.rcgu.o" "-Wl,--as-needed" "-L" "/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps" "-L" "/place/rust/contrib/ruff/target/release/deps" "-L" "/usr/local/rustup/toolchains/1.72-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-lgcc_eh" "-lgcc" "-lc" "/usr/local/rustup/toolchains/1.72-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-gnu/lib/libcompiler_builtins-e98df64cadd875cc.rlib" "-Wl,-Bdynamic" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "/usr/local/rustup/toolchains/1.72-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-gnu/lib" "-o" "/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/ruff_python_formatter-d5103041bb61df09" "-Wl,--gc-sections" "-static" "-no-pie" "-Wl,-z,relro,-z,now" "-Wl,-O1" "-nodefaultlibs" "-undefined" "dynamic_lookup"
  = note: error: unable to find Static system library 'gcc_eh' using strategy 'no_fallback'. searched paths:
            /place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libgcc_eh.a
            /place/rust/contrib/ruff/target/release/deps/libgcc_eh.a
            /usr/local/rustup/toolchains/1.72-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-gnu/lib/libgcc_eh.a
            /usr/local/rustup/toolchains/1.72-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-gnu/lib/libgcc_eh.a
          error: unable to find Static system library 'gcc' using strategy 'no_fallback'. searched paths:
            /place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libgcc.a
            /place/rust/contrib/ruff/target/release/deps/libgcc.a
            /usr/local/rustup/toolchains/1.72-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-gnu/lib/libgcc.a
            /usr/local/rustup/toolchains/1.72-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-gnu/lib/libgcc.a

error: could not compile `ruff_python_formatter` (bin "ruff_python_formatter") due to previous error

Caused by:
  process didn't exit successfully: `/usr/local/rustup/toolchains/1.72-x86_64-unknown-linux-gnu/bin/rustc --crate-name ruff_python_formatter --edition=2021 crates/ruff_python_formatter/src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,link -C opt-level=3 -C lto=fat -C codegen-units=1 --cfg 'feature="default"' --cfg 'feature="serde"' -C metadata=d5103041bb61df09 -C extra-filename=-d5103041bb61df09 --out-dir /place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps --target aarch64-unknown-linux-gnu -C linker=/home/sandbox/.cache/cargo-zigbuild/0.17.3/zigcc-aarch64-unknown-linux-gnu.sh -L dependency=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps -L dependency=/place/rust/contrib/ruff/target/release/deps --extern anyhow=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libanyhow-d773c4b449ba7692.rlib --extern bitflags=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libbitflags-00cbddb37865de95.rlib --extern clap=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libclap-c3150b07e1bd02d0.rlib --extern countme=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libcountme-66bb619c24c71fb6.rlib --extern itertools=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libitertools-1327eb584da2ff46.rlib --extern memchr=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libmemchr-570a1c555cf2c156.rlib --extern once_cell=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libonce_cell-44bf3c56b546124e.rlib --extern ruff_formatter=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libruff_formatter-afac7d90f3117771.rlib --extern ruff_python_ast=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libruff_python_ast-61130ac81486df61.rlib --extern ruff_python_formatter=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libruff_python_formatter-bafd76a0a46edff9.rlib --extern ruff_python_index=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libruff_python_index-edb6a4afaa5026cc.rlib --extern ruff_python_parser=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libruff_python_parser-f2abe69db5e13fb4.rlib --extern ruff_python_trivia=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libruff_python_trivia-022058b197ec5c90.rlib --extern ruff_source_file=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libruff_source_file-f8b3fa83166c3783.rlib --extern ruff_text_size=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libruff_text_size-0568ea01c8d42034.rlib --extern rustc_hash=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/librustc_hash-27719bb5f9f9bf70.rlib --extern serde=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libserde-0f4933fdf04b23e6.rlib --extern smallvec=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libsmallvec-6f1193bc99ed01c8.rlib --extern static_assertions=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libstatic_assertions-0ce627262f703e27.rlib --extern thiserror=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libthiserror-0544a68f0c99f803.rlib --extern tracing=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libtracing-bb3516bdceedb125.rlib --extern unicode_width=/place/rust/contrib/ruff/target/aarch64-unknown-linux-gnu/release/deps/libunicode_width-c435dab1e04893bc.rlib -C target-feature=+crt-static -C` (exit status: 1)

I have config.toml like this:

[target.aarch64-unknown-linux-gnu]
linker = "clang"
rustflags = [
  "-C", "target-feature=+crt-static",
]

The maintainer of cargo-zigbuild advised me to open an issue here https://github.com/rust-cross/cargo-zigbuild/discussions/186

Expected Behavior

Successful build as for Linux-x86_64

[polarathene]

You can reproduce this with a basic hello world program in Rust. That should simplify tracking down the cause.

While I haven't tried with Zig directly for an equivalent Hello World program, at a glance it looks like Zig supports static builds just fine. (EDIT: zig build vs zig cc is a different story it seems)

It's more likely to be an incompatibility with how cargo-zigbuild is implemented? libgcc / gcc_eh are related to internals with the rust compiler or cargo IIRC. Perhaps there is some logic there that needs to be carried over to cargo-zigbuild 🤷‍♂️

---

EDIT: I am partially wrong.

• While those files to link are related to the cargo build, Zig cannot compile a basic hello.c with static linking (the advice there doesn't seem to apply to libc.a as it'd compile but segfault when run on the same build host).
• Zig needs to fix their cc static build support before cargo-zigbuild can do anything about it.