This is a WASI port of 8cc built on ELVM. In other words, this is a complete C compiler written in WASI.
Prepare your C code. Following is a 'Hello world' example.
int putchar(int x);
int main() {
const char* p = "Hello, world!\n";
for (; *p; p++)
putchar(*p);
return 0;
}8cc.wasi compiles C code into ELVM IR (EIR).
$ cat hello.c | wasmtime 8cc.c.eir.wasi > hello.eir
$ cat hello.eir
.text
main:
#{push:main}
mov D, SP
add D, -1
store BP, D
mov SP, D
mov BP, SP
sub SP, 1
(snip)
elc.wasi compiles EIR into WASI.
$ (echo "wasi" && cat hello.eir) | wasmtime elc.c.eir.wasi > hello.wasi
$ cat hello.wasi
(module
(import "wasi_unstable" "fd_write" (func $__wasi_fd_write (param i32 i32 i32 i32) (result i32)))
(import "wasi_unstable" "fd_read" (func $__wasi_fd_read (param i32 i32 i32 i32) (result i32)))
(import "wasi_unstable" "proc_exit" (func $__wasi_proc_exit (param i32)))
(memory (export "memory") 1025)
(global $a (mut i32) (i32.const 0))
(global $b (mut i32) (i32.const 0))
(snip)
Run hello.wasi and get a result!
$ wasmtime hello.wasi
Hello, world!
Copyright 2020 Matt (Sanemat) (Murahashi Kenichi) The MIT License
Copyright (c) 2012 Rui Ueyama, The MIT License
Copyright (c) 2016 Shinichiro Hamaji, The MIT License