c-testsuite (vendored)

Snapshot of the single-exec test set from https://github.com/c-testsuite/c-testsuite — a portable, MIT-licensed collection of small standalone C programs designed for exercising subset C compilers. Each NNNNN.c is a self-contained program; per the suite spec, exit code 0 means pass and the program's stdout+stderr must match NNNNN.c.expected.

We use this to widen test coverage for cc.scm beyond the hand-written fixtures in tests/cc/. The runner lives at scripts/boot-run-tests.sh (suite cc-ext) and classifies each fixture as PASS, FAIL, or SKIP; SKIP covers tests that lean on features cc.scm does not support yet (e.g. needs-libc, needs-cpp cases beyond what our preprocessor handles, or anything that fails to compile through our pipeline). As cc.scm grows the SKIP count should drop and PASS should rise.

Each fixture has a .tags file describing portability/feature requirements (portable, c89, c99, c11, needs-libc, needs-cpp).

Licensing: LICENSE covers the runner/scaffolding from the upstream project; TESTS-LICENSE covers the individual test programs. Both are permissive (MIT / case-by-case attribution via upstream .otags). We omit the .otags files here — refer to the upstream repo if you need per-test provenance. Source tag for this snapshot: c-testsuite/c-testsuite@main as of 2026-05-02.