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export fn and finch build --shared: libraries a C program loads (game scripts)

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export fn name(...) is a C function by that name (numbers, bool, char, pointers in and out).
--shared builds lib<name>.so / <name>.dll with no main. finch_module_on_fatal(handler) lets the
host take runtime errors over (longjmp out) instead of the process exiting.
tests/shared.sh: a C host loads one, calls it and survives an index error.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Nexoniarz 2026-10-11 02:14:09 +02:00
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docs/en/cheatsheet.md
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@ -12,6 +12,7 @@ Everything in Finch on one page. For explanations, see the [guides](../../README
|---|---|
| `finch run file.fch [args…]` | compile and run (args go to the program) |
| `finch build file.fch [-o name]` | make a program (`name.exe` on Windows) |
| `finch build file.fch --shared` | make a library (`libfile.so`, `file.dll`) that a C program loads; its `export fn`s are its C functions (numbers, bool, char, pointers) |
| `finch ir file.fch` | print the LLVM IR |
| `finch lsp` | the language server (editors use it) |
| `finch version` | version |