Unknown type name 'uint32_t'

Not sure what's going on with this one. Do we have to do something new to see types from stdint when building c/c++ projects with Swift Package Manager in Swift 6?

Repro on Swift 6 compiler, swift-tools-version:5.5, Ubuntu 2404:

I should add that the file in question: geos/Sources/geos/include/geos/shape/fractal/HilbertEncoder.h at f510e634c822116fca615064d889300dba40d761 · GEOSwift/geos · GitHub

does not include stdint, so maybe that's the problem, but I'm curious to understand why this problem wasn't occurring in older versions of swift.