On Aug 5, 2023, at 12:11 PM, Greg Troxel <g...@lexort.com> wrote: > > As for 'external SDK', that would be "install some other OS and cross > build", but when you cross build for android or ios, you do that from a > system which is a full install.
This isn’t the case for the Apple platforms; Xcode comes with sysroot-style SDKs for Apple’s platforms that contain only headers and stub libraries (these days in the form of .tbd files, previously in the form of stub Mach-O files) since those are all that are needed to build. — Chris