Arch Linux

Sorry, submitted by accident, can't figure out how to edit.

vulkan-icd-loader includes vulkan.pc, which references the vulkan headers, but those are in the vulkan-headers package. If you have the former installed, but not the latter, a program using pkg-config to detect vulkan as an optional feature will find it, but then fail to compile because of the missing header.

Is there really any point in these two packages being separate in the first place? They're both tiny, and Arch packages generally include headers along with the libraries rather than in a separate package.

I’ve seen this issue too, and I concur that we normally don’t split headers.

Headers aren't splitted, they are built with vulkan-docs package.

You can't build headers as part of the icd loader, as it's not updated at every spec update, otherwise you'll have a vulkan-html-docs out-of-sync with vulkan-headers package.
vulkan.pc file doesn't refere to any headers file, just paths for libs and headers to help configure scripts.

We could add vulkan-headers as an optional dependency, but i don't like that because it adds only more noise.