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TinyPTC/Visual C++ 6 Linking Probs..

Started by Doomrat May 26, 2002 at 4:12 AM 6 replies 500+ views

Original Post

May 26, 2002 at 4:12 AM

So, I add all the tinyptc source files to my project, along with the headers, and link the mmx object file which I compiled seperately. All well and good, until I try to call ptc_open from main. main.obj : error LNK2001: unresolved external symbol "int __cdecl ptc_open(char *,int,int)" (?ptc_open@@YAHPADHH@Z) That makes no sense to me - I''m staring right at the function in ddraw.c and I''ve double checked the #defines in tinyptc.h to make sure that I''m not asking the compiler to skip the function. If somebody could point out my silly mistake, I''d be grateful - thanks.

Alimonster

May 26, 2002 at 4:58 AM

Have you added the files to your project? I got that message so I copied over the files convert.c/h, ddraw.c, tinyptc.h/c and added them to the project. I linked to the compiled mmx thing and it worked okay after that for the test program.

Doomrat

May 26, 2002 at 5:09 AM

Yeah, they''re all added.

I''m going to compile them all into object files and link them by hand - not that I''m expecting it to work.

Alimonster

May 26, 2002 at 5:21 AM

Are you using VC++? If you are then I''ll mail you a test project that works (17K)...

Alimonster

May 26, 2002 at 5:32 AM

I've uploaded the test project here if you are interested (for VC++ 6).

EDIT: You might want to play around with the compiler and linker settings - it's set as the default (i.e. in Debug mode).

[edited by - Alimonster on May 26, 2002 6:35:20 AM]

Doomrat

May 26, 2002 at 5:34 AM

Thanks, I actually have that project though - there are a lot of settings in it which I don''t like, and I''d rather start with a clean project than have to fish around in the options changing everything I don''t like.

I think I need my project to treat my object files with C generated functions rather than C++. Somehow.

Doomrat

May 26, 2002 at 5:37 AM

Heh..

..my project compiles as a Release project.

Problem solved, thanks for your time

Alimonster

May 26, 2002 at 5:38 AM

quote:
Original post by Doomrat
Thanks, I actually have that project though - there are a lot of settings in it which I don't like, and I'd rather start with a clean project than have to fish around in the options changing everything I don't like.

The file I uploaded is a bare-bones test. I started an empty win32 app and added one file at a time until I got the desired result. The only thing you'd need to change is the main function itself.

quote:
I think I need my project to treat my object files with C generated functions rather than C++. Somehow.

Hmm, don't know much about that, I'm afraid. Try wrapping some of your functions using extern "C" { /* your code here */ }.

EDIT: Doh! Disregard then

[edited by - Alimonster on May 26, 2002 6:39:07 AM]

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