Shared library packaging issues

[GreatEmerald via Digitalmars-d]

On Tuesday, 18 November 2014 at 16:26:58 UTC, Marco Leise wrote:
> ABI differences in source files only apply to druntime/Phobos
> and these imports are generally on the default import path. I
> was more concerned with GtkD and similar 3rd party libraries,
> for which you have to specify the import path.

Fair enough, include files shouldn't be compiler-specific. But 
then why have them in a dlang subdirectory and not simply in each 
package's own subdirectory in includes root? Files in 
/usr/includes/libarcomage are probably easier to find than those 
in /usr/includes/dlang/libarcomage.