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boot: C import (import "x.h", link, C functions, constants, globals, .ptr, ptr(x))

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The self-hosted compiler reads headers with boot/cimport.fch and compiles calls to C
functions (variadics, char* as str, C's default promotions), enum and #define
constants, extern variables like stdout, C structs laid out as C laid them (padding
and fixed arrays, by pointer), .ptr of a str or array, ptr(x) and int(ptr). link
"lib" asks pkg-config, link "x.c" compiles the file along.

cimport and c_pointers pass. Not yet: structs by value (the calling convention) and
addr(fn) for C callbacks, which is also what stops it building itself.

boot.sh now says so when stage 2 can't be made and runs the tests on stage 1.
This commit is contained in:
Nexoniarz 2026-10-25 19:44:58 +01:00
commit 13ef63a586
6 changed files with 408 additions and 32 deletions
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3
boot/cimport.fch
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@ -24,6 +24,7 @@ struct CConst { // enum values and simple #define numbers
bool isFloat
int i
float f
str text // a float as written, so no digits are lost: 3.14159265358979323846
}
struct CField {
@ -399,7 +400,7 @@ fn macroValue(ptr[Importer] imp, CXCursor c) -> Number {
if neg {
v = 0.0 - v
}
return Number(c: CConst(isFloat: true, f: v), ok: true)
return Number(c: CConst(isFloat: true, f: v, text: body), ok: true)
}
r := parseInt(lit)
if r.ok && neg {