[Winpcap-users] 4.1.2 Compatibility with mingw-w64 toolchain?

[Gianluca Varenni]

--------------------------------------------------
From: "noreply" <noreply at slytechs.com>
Sent: Wednesday, October 06, 2010 9:40 AM
To: <winpcap-users at winpcap.org>
Subject: Re: [Winpcap-users] 4.1.2 Compatibility with mingw-w64 toolchain?

> I have a solution to this problem. The short answer is that there is a
> problem with the mingw-w64 toolchain, specifically in gcc's 'binutils' 
> which
> generate the actual dynamic library.
>
> The reason it works for 32-bit version and not for 64-bit version is that
> wpdpack/lib directory contains the libpwpap.a file which gcc can link
> against correctly, while the wpdpack/lib/x64 directory only contains the
> wpcap.lib and no 64-bit libwpcap.a compatible library. Therefore, because 
> of
> the 'binutils' bug, the 64-bit builds fail against the .lib file alone.
>
> May be in the future releases, the WinPcap team can generate the 
> libwpcap.a
> file as well for x64 architecture?

The reason why so far we haven't generated a libwpcap.a for x64 is that we 
use cygwin for the generation of the *.a files, and cygwin (last time I 
checked) does not support x64 compilation. It should rather straightforward 
to migrate to mingw, it's just something that we haven't done yet.

Have a nice day
GV


>
> Here is a link to the the full discussion on this:
>
> https://sourceforge.net/projects/mingw-w64/forums/forum/723797/topic/3882579
>
> Cheers,
> mark...
>
>> -----Original Message-----
>> From: winpcap-users-bounces at winpcap.org
>> [mailto:winpcap-users-bounces at winpcap.org] On Behalf Of Mark
>> Bednarczyk
>> Sent: Wednesday, October 06, 2010 10:14 AM
>> To: winpcap-users at winpcap.org
>> Subject: [Winpcap-users] 4.1.2 Compatibility with mingw-w64 toolchain?
>>
>> Hi,
>>     I'm linking my code using mingw-w64 toolchain on Win7
>> x86_64 system. The code compiles against the WpdPack 4.1.2,
>> wpcap in lib/x64 directory and links. Then at runtime all the
>> pcap_* library calls are incorrectly linked again WinPcap
>> 4.1.2 runtime install and core-dump immediately.
>>
>> Even this will coredump:
>>
>> const char *name = pcap_datalink_val_to_name(1);
>>
>> Has anyone tried using mingw-w64 to link their code with
>> latest x64 pcap?
>>
>> Here is a little blog I'm keeping on this issue, until its
>> resolved. It has a stack-trace:
>> http://jnetpcap.com/node/662
>>
>> Cheers,
>> mark...
>> http://jnetpcap.com
>>
>>
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>> Winpcap-users at winpcap.org
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>
>
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