cc — C compiler in scheme1

A single-file C compiler written in scheme1 (see docs/SCHEME1.md) that emits P1pp text, replacing MesCC at the live-bootstrap tcc-mes stage.

Specs

Read in this order:

1. docs/CC.md — accepted C subset.
2. docs/CCSCM.md — cc.scm code map: subsystems, data structures, pipeline.
3. docs/CC-EXT.md — platform extensions accepted beyond the base subset (the deltas tcc-0.9.26 actually uses).

Files

File	Purpose
cc.scm	All compiler modules in one file: util, data, lex, pp, cg, parse, and the cc-main driver. Sections are still labeled with their original ;; cc/<name>.scm — headers.
main.scm	One-liner production entry point: (sys-exit (cc-main (argv))). Tests omit it so they can run their own drivers.

Build (single source for scheme1):

catm  build/$ARCH/cc/cc.scm \
      scheme1/prelude.scm cc/cc.scm cc/main.scm

Tests

• tests/cc-util/ — util helpers (Scheme unit tests)
• tests/cc-lex/ — lexer token-stream goldens
• tests/cc-pp/ — preprocessor token-stream goldens
• tests/cc-cg/ — direct cg API → ELF → run; assert runtime
• tests/cc/ — full pipeline via .c → ELF → run; assert runtime

Both cc-cg and cc are runtime-validating: the harness builds the emitted P1pp into a real ELF, runs it, and asserts exit code / stdout. No P1pp-text goldens.