install_binary downloaded the release binary, chmod'd it, and printed
"✓ Installed omp" with exit 0 without ever running it. Bun's musl-target
binaries link libstdc++/libgcc dynamically, which stock Alpine/musl systems
lack, so the binary exits 127 with relocation errors while the installer
still claimed success.
Smoke-run `omp --version` after install; on failure print the captured
error, add the `apk add libstdc++ libgcc` remediation for musl targets,
and exit non-zero. Document the Alpine/musl runtime requirement in the
README install section.
Fixes#7545
roboomp
5046438f3b