How I Built a Mini C Compiler to Understand How Compilers Work



This content originally appeared on DEV Community and was authored by Rino Di Paola

I’ve always been fascinated by how programming languages are transformed into executable code.

As a software engineer, I use compilers every day — but I realized I had never really understood what happens behind the scenes.

To change that, I decided to build a Mini C Compiler from scratch, focusing on learning rather than performance or completeness.

The goal was simple: understand how each stage of a compiler works — from lexical analysis to parsing and interpreting — and document everything clearly.

The project supports a basic subset of the C language and runs through an interpreter to execute the code.

While it’s far from a production-grade compiler, it gave me a much clearer picture of how real compilers like GCC or Clang are structured internally.

I tried to make the documentation as clear as possible so that anyone else interested in learning these concepts can follow the same path I did.

🧩 Repository and documentation:

https://github.com/ironrinox/mini-c-compiler

If you’re a beginner or a curious developer looking to understand compilers in a more practical way, I hope this project can be a useful reference.


This content originally appeared on DEV Community and was authored by Rino Di Paola