X-Spam-Check-By: sourceware.org Message-ID: <463909F9.6B33B9C7@dessent.net> Date: Wed, 02 May 2007 15:00:25 -0700 From: Brian Dessent X-Mailer: Mozilla 4.79 [en] (Windows NT 5.0; U) MIME-Version: 1.0 To: cygwin@cygwin.com Subject: Re: Please Help!! Calling Socket function in a dll file (that is created using cygwin library), by a Microsoft Visual C++ program resulting in infinite loop References: <507150040705021415r750600a6oc6e24b339bf57143@mail.gmail.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-IsSubscribed: yes Reply-To: cygwin@cygwin.com Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com kalasad mailu wrote: > I am trying hard to get this stuff working!!!!!! Could you please help me. > > I created a dll file (test.dll), which contains the function that > creates a socket and return the success/failure status. This file uses > the socket.h provided by cygwin. I compiled this dll using gcc on > cygwin. > > I also created a library file(testdll.lib) from this dll(test.dll). > When I tried to call the function defined in the test.dll in a program > (written in Microsoft Visual C++), this enters (that is created using > cygwin library), by a Microsoft Visual C++ program rean infinite loop. > The same program works fine if I call getuid or random function > instead of socket. And the stack is as below. I would really > appreciate if I can get some suggestions on how to get this working. The Cygwin DLL has special requirements for initialization. This happens automatically for executables compiled with gcc, but otherwise you need to explicly init the library. The details are all in the FAQ. > gcc -shared -I ../../cygwin/usr/include/cygwin -o testdll.dll test.cpp > -Wl,--output-def,testdll.def,--out-implib,libtestdll.a > > Command used to create the library file: > > "C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\bin\lib" > /machine:i386 /DEF:testdll.def Why not simply "cp libtest.dll.a testdll.lib"? They're the same thing. Brian -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/