[RESOLVED] mingw with STL problems

[Cheezewizz]

Hey guys. I've got some code using the windows packet capture library (winpcap) that works fine when compiled with Visual Studio, but just won't compile with Mingw. After a few tweaks I think I've finally found the root of the problem but can't for the life of me figure out how to fix it. It's when both pcap.h and any STL container class header is included...

The simplest way I found to reproduce the issue I'm having is with the following code...

#include <pcap.h>
#include <windows.h>
#include <stdio.h>

int main(int argc, char* pszArgs[])
{
	printf("Testing");
	return 0;
}

Compiled with

g++ blah.cpp -o blah.exe -IWpd\Include

it compiles fine. However adding for example #include <deque> and trying to compile with same arguments results in it going mental and complaining about errors like '::snprintf has not ben declared'. Removing either of these

#include <pcap.h>
#include <deque>

and it will compile. Anyone with any ideas/comments? Any thoughts much appreciated

[ltcmelo]

Just some ideas which might help identify the problem...

Have you tried adding the three headers in different orders? If you #include <cstdio> instead of #include <stdio.h> does it change anything (cstdio is the corresponding C++ header of stdio.h)?

[Cheezewizz]

Gah, lol yep it was as simple as that. Well, that's embarassing. Changing my original code's include order to

#include <stdio.h>
#include <windows.h>
#include <deque>
#include <process.h>
#include <pcap.h>

sorted it out. Compiles fine now, anyone care to explain why? Cheers ltcmelo

[Paul McKenzie]

Gah, lol yep it was as simple as that. Well, that's embarassing. Changing my original code's include order to

#include <stdio.h>
#include <windows.h>
#include <deque>
#include <process.h>
#include <pcap.h>

sorted it out. Compiles fine now, anyone care to explain why? Cheers ltcmelo

The simplest explanation is that there is some af conflict going on between two or more headers, where the same symbol is defined or declared in each of the headers diffrently.

Regards,

Paul McKenzie