Will Anderson 13948f57a6 self-host: fold fn main() body into C int main(); rename C params ...

The El compiler self-host has been broken since `fn main()` landed in
compiler.el. Both bootstrap.py and codegen.el skipped emitting an
`el_val_t main()` (correct - it would collide with C's int main),
but neither folded the body anywhere. The C int main() got just
runtime init + return, so any El program that put its work inside
`fn main()` produced a binary that did nothing.

Fix in two places (bootstrap.py and codegen.el, kept symmetric):

  1. Capture the body of `fn main()` during the FnDef pass.
  2. Emit `int main(int _argc, char** _argv)` so El programs can
     declare their own local `argv` / `argc` (compiler.el itself
     does this) without colliding.
  3. After top-level statements, fold the captured fn main body
     into C main alongside them, then return 0.

Self-host fixed point reached: gen 2 and gen 3 of compiler.el's
output are byte-identical (md5 5b4eca2a...). The new elc compiles
products/web/src/main.el natively now - 24 imports resolved, 1,173
lines of C, every imported function (page_open, nav, pricing,
checkout_page, account_page, founding_badge…) emits its forward
decl + body without a concat preprocessor in sight.

Backup of the prior self-hosted binary is at
dist/platform/elc.preselfhost in case we need to fall back.

2026-05-02 01:30:04 -05:00

216 KiB

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