A toy C compiler written in Rust.
LLVM should be installed in your system.
The version of LLVM to be used can be specified by changing features of inkwell crate in Cargo.toml .
$ cargo run -- help
Usage: rcc <COMMAND>
Commands:
preprocess View the preprocessing result of a source file
lex View the lexical analysis result of a source file
syntax View the syntax analysis result of a source file
semantic View the semantic analysis result of a source file
compile-binary Generate binary from a source file
compile-assembly Generate assembly from a source file
help Print this message or the help of the given subcommand(s)
Options:
-h, --help Print help
-V, --version Print version
Let's generate some fibonacci numbers!
int fib(int n) {
if (n == 1) return 1;
if (n == 2) return 1;
return fib(n - 1) fib(n - 2);
}We will use rcc to compile assets/fib.c (which contains a simple fibonacci function)
to out/fib.o , and then use clang to compile assets/fib_main.c (which reads
an integer n, then print the result of our fib(n) and a reference fib_ref(n) ) ,
then link out/fib.o , and finally produce out/fib_main .
mkdir -p out
cargo run -r -- compile-binary assets/fib.c out/fib.o
clang assets/fib_main.c out/fib.o -o out/fib_main
Try some n :
$ ./out/fib_main
Calculate fibonacci sequence to: 42
Reference Fib(42) = 267914296
rcc Fib(42) = 267914296