| 19 Jan 2026 |
 Randy Eckenrode | I did make one tweak to add a product to Package.swift. The new SwiftPM hook supports installing products automatically if they’re defined in Package.swift. | 20:36:36 |
 samasaur | oh that's really nice | 20:36:46 |
| Randy Eckenrode | $ nix develop -f . swiftPackages.cxx-interop-test -L
$ command -v clang
/nix/store/3fbjimjwwxk682a9gkbr2nss0yf232mf-clang-wrapper-21.1.8/bin/clang
| 20:37:13 |
| Randy Eckenrode | Though I’m not sure that Swift 6.2 is invoking clang for its interop support. | 20:37:27 |
 Katalin 🔪 | perhaps it needs additional include directories, or swiftpm does use swift clang inherently | 20:37:29 |
| Randy Eckenrode | It seems to be fine when invoked by SwiftPM but not when called directly. I can use the Xcode clang just fine with that header. | 20:44:47 |
| Katalin 🔪 | yeah, that sounds like the same situation then | 20:45:49 |
| Katalin 🔪 | iirc that generated header has a bunch of conditional includes at the top with has_include, and these errors look like missing defines, so maybe if you give it just the right include paths it'll get further, but I'd have to start digging | 20:46:51 |
| Randy Eckenrode | It needs this header: swiftToCxx/_SwiftCxxInteroperability.h . | 20:48:15 |
| Randy Eckenrode | That has the defines. | 20:48:23 |
| Randy Eckenrode | The Xcode toolchain ships it at /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/swiftToCxx/_SwiftCxxInteroperability.h. | 20:49:32 |
| Randy Eckenrode | I can put it in stdlib-dev/include, which should get picked up automatically by the wrapper. | 20:51:21 |
| Randy Eckenrode | * I can put it in stdlib-dev/include, which should get picked up automatically by the wrapper. | 20:51:29 |
| Katalin 🔪 | well well, the very simple case (empty module) does compile with that and clang++ 19. I'll have to test it with a larger project that actually exports some types | 20:52:43 |
| Randy Eckenrode | I have a working test that creates a Swift struct from C++ and prints the value. | 22:46:16 |
