Top 3 C++ compiler-frontend Projects

psychec

4 496 7.3 C++

A compiler frontend for the C programming language
vast

2 334 9.9 C++

VAST is an experimental compiler pipeline designed for program analysis of C and C++. It provides a tower of IRs as MLIR dialects to choose the best fit representations for a program analysis or further program abstraction.

Project mention: Print(“lol”) doubled the speed of my Go function | news.ycombinator.com | 2023-08-23

Most languages target C or LLVM, and C and LLVM have a fundamentally lossy compilation processes.
To get around this, you'd need a hodge podge of pre compiler directives, or take a completely different approach.
I found a cool project that uses a "Tower of IRs" that can restablish source to binary provenance, which, seems to me, to be on the right track:
https://github.com/trailofbits/vast
I'd definitely like to see the compilation processes be more transparent and easy to work with.

WorkOS

workos.com sponsored

The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.
mewa

1 21 0.0 C++

Compiler-compiler for writing compiler frontends with Lua

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).