Shared Libraries: add ?sharedlibrary conditional

[GWRon]

I just tried to wrap my DLL-source into a new file so I could use the functionality there without requiring a new file (yes, I could wrap the DLL functions around some core functions and use the core functions in my "new file" but this is not what I wanted to do ;-)).

So ... To use a file as "dll" we need to use InitBrl(). This is only defined when you compile a file as "shared library".

• it is not defined in imported files (import "core.bmx" - core.bmx does not know about InitBrl())
• there is no way to skip calling InitBrl() if the file does not know about the build target (there is "gui" and "console" handled for now)

So I ask for:

• adding ?sharedlibrary next to ?console and ?gui
• make InitBrl() callable from imported files too (if possible).
• optionally: make InitBrl() a stub for non-shared libs? Dunno how this would affect precompilates (dll.bmx imports core.bmx. app.bmx imports core.bmx. core.bmx calls InitBrl()). maybe sharedlibraries need to have their own filename thing like console or gui.