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chore: update runner shim and linker flags for mips atomics
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spinline
2026-02-07 00:19:36 +03:00
parent c2492b2749
commit f4d0351c5b
2 changed files with 19 additions and 2 deletions
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4
.gitea/workflows/build-mips.yml
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@@ -34,7 +34,9 @@ jobs:
env:
# Ensure we are building a fully static binary
# -C link-self-contained=no: Let Zig (the linker) handle CRT objects (crt1.o, etc.)
RUSTFLAGS: "-C target-feature=+crt-static -C link-self-contained=no"
# --defsym=__atomic_is_lock_free=... Maps the missing symbol to our shim
RUSTFLAGS: "-C target-feature=+crt-static -C link-self-contained=no -C link-arg=-msoft-float -C link-arg=-Wl,--defsym=__atomic_is_lock_free=__atomic_is_lock_free_shim"
CFLAGS_mips_unknown_linux_musl: "-msoft-float"
run: |
cd backend
cargo zigbuild --target mips-unknown-linux-musl --release -Z build-std=std,panic_abort

17
docker/runner/Dockerfile
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@@ -46,7 +46,22 @@ RUN ARCH=$(dpkg --print-architecture) && \
mv "zig-linux-$ZIG_ARCH-$ZIG_VER" /root/zig && \
rm zig.tar.xz
# 5. Install Tools (Trunk, cargo-zigbuild, wasm-bindgen protocol aligned)
# 5. Fix: Create libatomic.a shim for MIPS
# MIPS musl static build often misses __atomic_is_lock_free.
# We create a minimal implementation to satisfy the linker.
# We rename the function to avoid builtin conflict and alias it via linker flags later.
RUN . "$HOME/.cargo/env" && \
echo '#include <stdbool.h>' > atomic.c && \
echo 'bool __atomic_is_lock_free_shim(unsigned int size, const volatile void *ptr) { return size <= 4; }' >> atomic.c && \
/root/zig/zig cc -target mips-linux-musl -msoft-float -c -o atomic.o atomic.c && \
/root/zig/zig ar rcs libatomic.a atomic.o && \
RUST_SYSROOT=$(rustc --print sysroot) && \
TARGET_LIB_DIR="$RUST_SYSROOT/lib/rustlib/mips-unknown-linux-musl/lib" && \
mkdir -p "$TARGET_LIB_DIR" && \
cp libatomic.a "$TARGET_LIB_DIR/" && \
rm atomic.c atomic.o libatomic.a
# 6. Install Tools (Trunk, cargo-zigbuild, wasm-bindgen protocol aligned)
# We install trunk binary to save time, others via cargo
RUN . "$HOME/.cargo/env" && \
# Install cargo-zigbuild