unresolved externals error - GameCreators Forum

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Ondrej

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Joined: 18th Apr 2008

Location: Slovakia

Posted: 19th Apr 2008 10:23

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I need add to my code this line, because i use objects c++, e.g. fin.open, fin.read atc.:

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#include <iostream>
using namespace std;
#include <fstream>

but compiler always report error:
warning LNK4098: defaultlib 'libcmt.lib' conflicts with use of other libs; use /NODEFAULTLIB:library
error LNK2019: unresolved external symbol __malloc_dbg referenced in function "void * __cdecl operator new(unsigned int,struct std::_DebugHeapTag_t const &,char *,int)" (??2@YAPAXIABU_DebugHeapTag_t@std@@PADH@Z)
error LNK2019: unresolved external symbol __free_dbg referenced in function "void __cdecl operator delete(void *,struct std::_DebugHeapTag_t const &,char *,int)" (??3@YAXPAXABU_DebugHeapTag_t@std@@PADH@Z)
fatal error LNK1120: 2 unresolved externals

How can i resolve this?thx

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Lilith

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Joined: 12th Feb 2008

Location: Dallas, TX

Posted: 19th Apr 2008 17:47

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Use the search facility on "libcmt.lib". You should find a thread or two on this subject.

Lilith, Night Butterfly
I'm not a programmer but I play one in the office

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bobba

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Posted: 28th Apr 2008 18:34

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you cannot use #include <iostream> with dark basic, you must use dbtext and other comands instead

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Lilith

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Posted: 28th Apr 2008 19:01

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Quote: "you cannot use #include <iostream> with dark basic, you must use dbtext and other comands instead"

Says who? iostream deals with input and output true. But it also deals with file streams which I've used in preference to the GDK commands due to familiarity. No, you can't use them to get input and echo to the screen because the output for GDK isn't standard. But you can use it to output to stdout and other files.

Lilith, Night Butterfly
I'm not a programmer but I play one in the office

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jason p sage

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Joined: 10th Jun 2007

Location: Ellington, CT USA

Posted: 28th Apr 2008 19:06

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Hi Lilith, how do you make linking with iostream possible in your DarkGDK stuff?

I'm running into that linking issue we hear about, and my search have been coming up blank ... seems like some old threads might of got purged

Who knows.

Anyways, I'm trying to make a routine that simply APPENDS a text file, and it LOOKS like the DarkGDK routines do not have a decent way to append to an existing file.... Or am I missing something?

http://www.jasonpetersage.com/?PAGE=ironinfantry&SECTION=ironinfantry

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Lilith

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Posted: 28th Apr 2008 19:38

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Does it compile without error if you compile it in Release mode? If so, then you're running into the problem that exists only in Debug mode. You have to set /Project/Properties/C++/Code Generation/Runtime Library to /MT instead of /MTd. I'm using fstream for my Grid class, which is a child of my Bitmap class, to write out my configuration. I'm using <fstream> but it's not that different from <iostream>.

The GDK libraries don't appear to have a debug version so you apparently can't compile it in combination with the libraries that do. So you essentially tell the compiler to use the non-debug libraries for the traditional libraries.

Lilith, Night Butterfly
I'm not a programmer but I play one in the office

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jason p sage

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Posted: 28th Apr 2008 19:46

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Ok.. I'll try that