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From: Arun Ashok on 13 Apr 2010 04:51
hi diego,

Are u able to sort out this problem?.. I am having the same .. Any inputs would be valuable..

Arun




"Diego Rebelo" <diegorocharebelo(a)hotmail.com> wrote in message <hljuem$49e$1(a)fred.mathworks.com>...
> I'm trying to compile a .c file using mex command in MatLab. This file contains Matlab Engine functions, such as engOpen. This file also contains calls to the following methods: socket, WSAStartup, htons, gethostname, bind, recvfrom,etc. This program is a UDP server that receives datagrams and based on mensage received it interacts and send mensage to MatLab a matlab Session. To compile it I use the following commands in matlab workspace: optsfile = [matlabroot '\bin\win32\mexopts\lccengmatopts.bat'];
> And mex('-f', optsfile, 'SlaveMDL.c'); .
>
> But when I execute these commands the folllowing erros appears in workspace : c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_WSAStartup@8'
> c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_socket(a)12'
> c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_WSACleanup@0'
> c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_htons@4'
> c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_gethostname@8'
> c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_gethostbyname@4'
> c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_closesocket@4'
> c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_bind(a)12'
> c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_recvfrom(a)24'
> C:\ARQUIV~1\MATLAB\R2009B\BIN\MEX.PL: Error: Link of 'SlaveMDL.exe' failed.
>
> My .C file already includes all .h files such as winsock.h, engine.h,etc. My .c file header is like this:
>
> #include <stdio.h>
> #include <windows.h>
> #include <stdlib.h>
> #include <string.h>
> #include <winsock2.h>
> #include <time.h>
> #include "engine.h"
>
> Anyone can help me ???
From: Steve Amphlett on 13 Apr 2010 07:03
"Arun Ashok" <arunashok(a)gmail.com> wrote in message <hq1b9p$7m6$1(a)fred.mathworks.com>...
> hi diego,
>
> Are u able to sort out this problem?.. I am having the same .. Any inputs would be valuable..
>
> Arun
>
>
>
>
> "Diego Rebelo" <diegorocharebelo(a)hotmail.com> wrote in message <hljuem$49e$1(a)fred.mathworks.com>...
> > I'm trying to compile a .c file using mex command in MatLab. This file contains Matlab Engine functions, such as engOpen. This file also contains calls to the following methods: socket, WSAStartup, htons, gethostname, bind, recvfrom,etc. This program is a UDP server that receives datagrams and based on mensage received it interacts and send mensage to MatLab a matlab Session. To compile it I use the following commands in matlab workspace: optsfile = [matlabroot '\bin\win32\mexopts\lccengmatopts.bat'];
> > And mex('-f', optsfile, 'SlaveMDL.c'); .
> >
> > But when I execute these commands the folllowing erros appears in workspace : c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_WSAStartup@8'
> > c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_socket(a)12'
> > c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_WSACleanup@0'
> > c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_htons@4'
> > c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_gethostname@8'
> > c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_gethostbyname@4'
> > c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_closesocket@4'
> > c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_bind(a)12'
> > c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_recvfrom(a)24'
> > C:\ARQUIV~1\MATLAB\R2009B\BIN\MEX.PL: Error: Link of 'SlaveMDL.exe' failed.
> >
> > My .C file already includes all .h files such as winsock.h, engine.h,etc. My .c file header is like this:
> >
> > #include <stdio.h>
> > #include <windows.h>
> > #include <stdlib.h>
> > #include <string.h>
> > #include <winsock2.h>
> > #include <time.h>
> > #include "engine.h"
> >
> > Anyone can help me ???

Have you linked with ws2_32.lib? It is the actual library that contains the functions prototyped in winsock2.h.
From: Arun Ashok on 13 Apr 2010 08:12
Hi.

I got it.. It didnt work with ws2_32.lib but instead with wsock32.lib..

Arun

Steve Amphlett" <Firstname.Lastname(a)Where-I-Work.com> wrote in message <hq1j1b$914$1(a)fred.mathworks.com>...
> "Arun Ashok" <arunashok(a)gmail.com> wrote in message <hq1b9p$7m6$1(a)fred.mathworks.com>...
> > hi diego,
> >
> > Are u able to sort out this problem?.. I am having the same .. Any inputs would be valuable..
> >
> > Arun
> >
> >
> >
> >
> > "Diego Rebelo" <diegorocharebelo(a)hotmail.com> wrote in message <hljuem$49e$1(a)fred.mathworks.com>...
> > > I'm trying to compile a .c file using mex command in MatLab. This file contains Matlab Engine functions, such as engOpen. This file also contains calls to the following methods: socket, WSAStartup, htons, gethostname, bind, recvfrom,etc. This program is a UDP server that receives datagrams and based on mensage received it interacts and send mensage to MatLab a matlab Session. To compile it I use the following commands in matlab workspace: optsfile = [matlabroot '\bin\win32\mexopts\lccengmatopts.bat'];
> > > And mex('-f', optsfile, 'SlaveMDL.c'); .
> > >
> > > But when I execute these commands the folllowing erros appears in workspace : c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_WSAStartup@8'
> > > c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_socket(a)12'
> > > c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_WSACleanup@0'
> > > c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_htons@4'
> > > c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_gethostname@8'
> > > c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_gethostbyname@4'
> > > c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_closesocket@4'
> > > c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_bind(a)12'
> > > c:\docume~1\cea\config~1\temp\mex_m8~1\slavemdl.obj .text: undefined reference to '_recvfrom(a)24'
> > > C:\ARQUIV~1\MATLAB\R2009B\BIN\MEX.PL: Error: Link of 'SlaveMDL.exe' failed.
> > >
> > > My .C file already includes all .h files such as winsock.h, engine.h,etc. My .c file header is like this:
> > >
> > > #include <stdio.h>
> > > #include <windows.h>
> > > #include <stdlib.h>
> > > #include <string.h>
> > > #include <winsock2.h>
> > > #include <time.h>
> > > #include "engine.h"
> > >
> > > Anyone can help me ???
>
> Have you linked with ws2_32.lib? It is the actual library that contains the functions prototyped in winsock2.h.
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