So i was just playing around with something, just to see if its possible. Basically, i wanted to create a dll from haxe via hxcpp, then take said .dll and load it into another haxe program, again via hxcpp - and i fell at the first hurdle.
So, i have a “nothing program” (empty
Main::main), and added
-D dll_import to the build.
Firstly i get a few warnings:
haxe/lib/hxcpp/git/include\hx/Telemetry.h(33): warning C4273: '__hxcpp_gc_used_bytes': inconsistent dll linkage
haxe/lib/hxcpp/git/include\hx/GC.h(34): note: see previous definition of '__hxcpp_gc_used_bytes'
Which can be fixed by prefixing the referenced functions in
HXCPP_EXTERN_CLASS_ATTRIBUTES so the signatures match.
More importantly, i get a link error:
LINK : fatal error LNK1181: cannot open input file '1.obj'
Which obviously stops the build. Anyone have any ideas about this / done this? Or what
1.obj even is?
Hi, Ian! This is very interesting theme, I’m too looking for similar stuff. But currently without success I’ll follow this theme, maybe some ideas will be appear.
I think, here is solution for your sotuation
Ah ha! Perfect! Thanks!
D dll_link rather than
Will crack on and see where i get, but so far the .dll is built and the dependency walker looks ok.
(Not sure how to mark a post as “solution”)
So i think dll_import might be needed after all, if you look at the the hxcpp Math_obj decl:
class HXCPP_EXTERN_CLASS_ATTRIBUTES Math_obj : public hx::Object
compared with my test:
class HXCPP_CLASS_ATTRIBUTES Main_obj : public hx::Object
_EXTERN_ part which presumably is a
Which is why dependency walker is showing haxe related classes in the output .dll but not mine. So i think the original question applies.
Follow up: So i guess the question is really, are the files “hxMath.h” and “Math.cpp” handwritten? Or generated? If they are generated, how? I assumed they were generated, but looking a little deeper im not so convinced now.
@ianharrigan, were you able to reference a dll in the end?
I’m fairly sure I’m able to import a static library (.lib) file via build.xml when building my native extension, but I’ve yet to have success referencing it’s respective dynamic (.dll) library.
IIRC correctly i didnt get anywhere with this. It was just a playaround so i didnt spend that much time on it… however, if you can share a project (demo) of creating a .lib and/or dll and consuming that lib from an external c++ app that sounds pretty useful… I might have another play around when i get a spare few hours…
Would be useful to be able to create .libs + .dlls built in haxe an consumed from non-haxe client applications.