[luajit]move luajit headers to the directory "include/luajit/" to avoid file conflicts.

[JackBoosY]

There are some file conflicts between them when building lua and luajit. So I modified the code to install the headers.

See #4019.

And I suggest that new port requests should also do this.

[pfirsich]

This breaks sol2 with luajit, because it assumes it can include <lua.h> and not <luajit/lua.h>. As LuaJIT is a drop-in replacement of Lua, it should simply not be allowed to install them both. The old behavior that resulted in an error is imho the right thing to do.

[dg0yt]

This breaks sol2 with luajit

No. luajit wasn't a dependency of sol2.

The old behavior that resulted in an error is imho the right thing to do.

No.

[pfirsich]

sol2 depends on a Lua implementation. Officially supported are PUC Lua, LuaJIT and MoonJIT. I would say lua is not any more a dependency of sol2 than luajit is. sol2 just needs one (any) of them and I think it should be supported to use sol2 with any of them when installed through vcpkg.

[dg0yt]

Keep the discussion in #31702.