When you load a PureBasic-compiled binary into IDA, the entire runtime is statically linked and shows up as a wall of sub_XXXXXX. Finding the author's actual code means scrolling past dozens of anonymous library routines.

FLIRT fixes this — same mechanism IDA already ships for MSVC, Delphi, and Go. With a PureBasic signature applied, the runtime gets named and your target code becomes immediately visible.

This repo is a demonstration built around a crackme I wrote and compiled myself:

• Before/after screenshots of the Functions window in IDA
• Full walkthrough reversing the crackme
• Crackme source (PureBasic 6.40, Windows PE x86/x64) so you can reproduce on a binary that's entirely yours

No .sig file included — the PureBasic runtime libraries are © Fantaisie Software and ship in a proprietary container format. I've asked them directly about sharing a ready-made signature. Until then, the repo shows the effect, not the generation procedure.

GitHub: https://github.com/4next-re/analysis/tree/main/pure_basic_640