fix(docker): install arm64 target libc headers for the cross build#964
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The slim golang image ships gcc-aarch64-linux-gnu's runtime libs but not the arm64 libc dev headers, so the CGO cross-compile failed with `bits/libc-header-start.h: No such file`. Add libc6-dev-arm64-cross, which provides the aarch64 sysroot headers. Verified by reproducing the amd64->arm64 cross-compile under emulation (fails without, CROSS_OK with). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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minhd-vu
enabled auto-merge (squash)
July 21, 2026 14:45
praetoriansentry
approved these changes
Jul 21, 2026
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Summary
The Docker publish workflow added in #963 fails on the arm64 cross-compile step (failed run):
Cause
The build stage installs
gcc-aarch64-linux-gnu, which pulls the arm64 runtime libs (libc6-arm64-cross,libgcc-14-dev-arm64-cross) but not the arm64 libc dev headers. The CGO cross-compile then can't findbits/libc-header-start.h/bits/wordsize.h. The release workflow (make cross) doesn't hit this because it runs on the fullubuntu-latestVM where those headers already exist; the slimgolangimage ships neither.The amd64 image builds fine (native compile on the amd64 runner), so only the arm64 path was affected.
Fix
Install
libc6-dev-arm64-cross, which provides the aarch64 sysroot headers.Validation
Reproduced the exact
amd64 → arm64cross-compile under emulation:libc6-dev-arm64-cross: identicalbits/libc-header-start.h: No such filefailure.CROSS_OK.arm64 image also rebuilt and runs (
polycli version) locally.🤖 Generated with Claude Code