Just a C Compiler (jcc)

C Compiler.

Can use either the custom backend or llvm.

The custom backend is located in jb/ which was previously a separate project(jb).

Examples

WIP, can currently handle a decent amount of stuff (functions, pointers, if/else, for, do/while, etc.). It even supports a decent amount of preprocessor features so far.

Take a look in the tests/ directory or commit history for a fuller picture of how much is supported.

The following is a very small example that correctly runs/compiles.

#include <stdbool.h>

extern int printf(char*);

bool isPerfect(int num) {
    int sum = 0;
    for (int i = 1; i < num; i++) {
        if (num % i == 0) {
            sum += i;
        }
    }
    return sum == num;
}

int main() {
    printf("Hello From JCC!");
    return isPerfect(28); // returns 1
}

Spec/Reference

C Spec

C preprocessor

Intel x86_64 Instruction set

Build

Replace CMAKE_PREFIX_PATH with your path/to/llvm

Build(Visual Studio)

cmake "-DCMAKE_PREFIX_PATH:STRING=C:/Program Files/llvm-16.0.6-windows-amd64-msvc16-msvcrt-dbg" -DCMAKE_EXPORT_COMPILE_COMMANDS:BOOL=TRUE -B/build -G "Visual Studio 17 2022"

Build(Clang+Ninja)

cmake "-DCMAKE_PREFIX_PATH:STRING=C:/Program Files/llvm-16.0.6-windows-amd64-msvc16-msvcrt-dbg" -DCMAKE_EXPORT_COMPILE_COMMANDS:BOOL=TRUE -B/build -GNinja