manual c function interop

TODO.md

@@ -4,16 +4,7 @@
 
 # milestones
 
-1. manual c function interop
-   - separate calling convention, implementation, linkage, and link name
-   - allow bodyless `c func` declarations with exact external symbol names
-   - require concrete types in foreign signatures; inferred `int` is invalid
-   - emit LLVM `declare` for referenced foreign functions
-   - compile and link additional c sources, object files, and libraries through CLI options
-   - preserve bodyful, mangled, demand-monomorphized `c func` behavior
-   - verify end-to-end with an integer-only c function
-
-2. interop type foundation
+1. interop type foundation
    - unsigned integers, floats, and target-dependent c scalar types
    - keep binding mutability (`::` / `=`) separate from element or pointee mutability (`mut`)
    - arrays and indexing
@@ -36,7 +27,7 @@
      - `Some :: c struct`: opaque c-layout struct
      - defer passing c structs by value until target ABI classification exists
 
-3. restricted c header imports
+2. restricted c header imports
    - treat an imported header as a synthetic, file-local package namespace
      - `import "relative/path/to/header.h"`
      - `other :: import "relative/path/to/header.h"`
@@ -46,13 +37,13 @@
    - diagnose unsupported declarations when referenced
    - research libclang's c API behind a replaceable c importer boundary
 
-4. c variadic calls
+3. c variadic calls
    - represent c variadics as a fixed parameter count plus a variadic flag
    - apply c default argument promotions at call sites
    - emit LLVM c-variadic declarations and calls
    - keep native brolang variadics and tuple design separate
 
-5. advanced c interop
+4. advanced c interop
    - by-value records and unions
    - function pointers and callbacks
    - external variables