C++ compiler staple EDG goes public after 30 years

After 30 years as a proprietary industry workhorse, EDG's C++ front-end is now open source.

On September 30, 2026, the Edison Design Group published the source code for its C++ compiler front-end on GitHub. The C++ Alliance, a nonprofit that also supports the Boost C++ Libraries, is taking over as the project's official home. John Spicer stays on to chair the oversight committee, while EDG developers hired by the Alliance will handle ongoing maintenance.

Why it matters: EDG's front-end spent decades powering C++ tools and commercial compilers behind paid license agreements. Moving to open source eliminates annual licensing fees, removes vendor lock-in, and gives the public direct access to a standard-setting C++ parser.

Here's the gist of the new setup: development now runs across three public tracks—community pull requests, open bug fixes, and collectively funded features. Everything lands in the same public repository at the same time, with no early access for high bidders.

Thirty years of core C++ plumbing, now just a git clone away.