tcc 0.9.27's lib/bcheck.c uses __malloc_hook, removed in glibc 2.34, so
the pinned build failed on Ubuntu 24.04 (lib/bcheck.c:738). Shards never use
-b; the build now passes BCHECK_O= unconditionally, keeping every other
libtcc1.a object. The bundle smoke also clears LIBRARY_PATH, CC and
GCC_EXEC_PREFIX and checks shards import no bounds-checking symbols.
Verified: linux_tcc_bundle_smoke_test passes on Ubuntu 24.04 x86_64
(glibc 2.39, gcc + libc6-dev installed, so host headers exist but are not
used) and on Steam Runtime sniper (glibc 2.31).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- compile_overlays: the bundle layout now compiles with -nostdinc and only
the bundle's own headers (tcc's include/, then musl's libc-include/), so a
host with libc6-dev cannot change what a shard compiles against.
- runtime/tests/test_linux_tcc_bundle_smoke.py (ctest
linux_tcc_bundle_smoke_test): stages the bundle exactly as a release does
(pinned tcc 0.9.27 built from source, musl 1.2.5 headers, runtime
headers), compiles an emitter-shaped overlay shard through
compile_overlays' own tcc path (preamble shim, call_by_address rewrite,
exports) for PGXP flavors 0 and 2 with PATH emptied, loads the .so and
checks overlay_abi() and the exported function. Linux x86_64 only (skips
77 elsewhere). Passes in the Steam Runtime sniper SDK image.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Shokunin