Mail Archives: cygwin/2009/07/28/07:57:18
Hi Dave,
the dependency was a bug of my own.
I tried linked against pthread...
now the my dll does not depend on cygwin1.dll anymore
Thanks a lot for your help
Georg
Am 28.07.2009 um 12:56 schrieb Georg Troska:
> Hi,
> this information was very usefull to me. Thank you very much.
>
> My plan is to build a dll with cygwin, that does not depend on
> cygwin1.dll.
> unfortunatelly my library is build now (that is great) but it still
> depends on cygwin1.dll (I have done objdump -P .. | grep dll)
>
> Is it possible that the w32api-winsock library depends on this as
> well? I do not understand where this dependency comes from
>
> Thank you very much
> Am 28.07.2009 um 12:11 schrieb Dave Korn:
>
>> Georg Troska wrote:
>>> hi,
>>> thank you very much for this information
>>>
>>> Where o I find windsock.h and its library? Do I need a SDK (e.g.
>>> Visual
>>> C++) for this?
>>
>> Nope, you need the w32api package (you should probably already have
>> it),
>> this works for both cygwin and mingw compiles and provides headers in
>> /usr/include/w32api and libraries in /usr/lib/w32api that let you
>> use all the
>> standard windows OS functions. The file you're looking for is
>> /usr/include/w32api/winsock2.h (plain 'winsock.h' only gives the
>> old V1
>> windows socket interface, nobody uses it any more), and the library
>> is
>> /usr/lib/w32api/libws2_32.a, the -I and -L options for the compiler
>> should
>> already be set up correctly so you just write "#include
>> <winsock2.h>" in your
>> C source and add '-lws2_32' to the compiler command line and away
>> you go.
>>
>> Note that you only want this as long as you're using -mno-cygwin;
>> if you
>> decide to write a Cygwin application, you just use the standard
>> POSIX socket
>> functions and don't use winsock2.h or libws2_32.a, and the Cygwin
>> DLL takes
>> care of the rest for you. (It is even possible to write a Cygwin
>> app that
>> bypasses the Cygwin DLL POSIX socket functions and uses the winsock
>> API
>> directly, but it's not a standard thing to do and fraught with
>> possibilities
>> for bugs to arise, so I'd recommend against it.)
>>
>> cheers,
>> DaveK
>>
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