Build fails if old version of Vulkan-Loader is installed

[sarnex]

Hi all,

I am the Gentoo maintainer of the Vulkan-* packages.

We hit an issue when adding support for Vulkan-Loader version 1.1.77.0. The issue is related to #42

If you have Vulkan-Loader < 1.1.77.0 installed when compiling Vulkan-Loader 1.1.77.0, it will use the already-installed '/usr/include/vulkan/vk_layer_dispatch_table.h' header. This causes compile errors because it is not the file which would have been generated:

https://658900.bugs.gentoo.org/attachment.cgi?id=536992

It seems the only way to fix this error is to force regeneration of the vk_layer_dispatch_table.h by deleting or renaming it.

We need this to be handled by the build system. An ideal solution seems to be to universally regenerate vk_layer_dispatch_table.h.

Distro bug report: https://bugs.gentoo.org/658900

Thank you,
Sarnex