[Coin-discuss] RE: problem with OSI and CPLEX on MinGW+MSYS

Wed May 23 14:00:23 EDT 2007

Hi Weiguo,

The problem you seem to have encountered on Linux was probably due to not 
providing all necessary information in order to link with the Xpress 
library - skipping the test during the configuration would not have solved 
your problem, it would just have postpone it to the linking stage(?).

The issue that Michal mentioned is specific to MSYS and Cygwin.  I had 
seen that before (which is the reason I added the --disable-cplex-libcheck 
for configure).

Thanks in any case for the discussion.

Andreas

On Wed, 23 May 2007, Weiguo Liu wrote:

> Hi, Michal,
>
> I had similar problem with Xpress lib in Linux as well.
> The problem goes away when I specify the particular lib for with_xpress_lib
> parameter. In your case, you may want to try the following:
>
> ./configure -C, with the following options in a config.site file:
> with_cplex_incdir=/g/Cplex90/include/ilcplex
> with_cplex_lib=/g/Cplex90/lib/msvc6/stat_mda/cplex90.lib
>
> Note in my case it is libxpres.so i.e. the full display name of the lib ---
> I'm not sure yours is cplex90.lib or libcplex90.lib?
>
> Weiguo
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 23 May 2007 15:30:18 +0200
> From: Michal Kaut <mail at michalkaut.net>
> Subject: [Coin-discuss] problem with OSI and CPLEX on MinGW+MSYS
> To: coin-discuss at list.coin-or.org
> Message-ID: <465441EA.604 at michalkaut.net>
> Content-Type: text/plain;	charset=ISO-8859-1;	format=flowed
>
> Hello,
>
> I have had a problem with the OSI configure script, when using Cplex 9.0
> library, on Windows with MinGW+MSYS. I managed to localize the problem
> and find the way around it, but I still do not know what the problem is
> and how to correct it - and, most importantly, whether it is a problem
> with my GCC/MinGW/MSYS configuration or a general issue.
>
> Anyway, I just thought that someone else might find the "solution" useful...
>
>
> 1. The problem
> I run ./configure -C, with the following options in a config.site file:
> with_cplex_incdir=/g/Cplex90/include/ilcplex
> with_cplex_lib="-L/g/Cplex90/lib/msvc6/stat_mda -lcplex90"
> The script stops with an error; The last few lines of output are:
> checking if user provides library for Cplex... yes
> checking for /g/Cplex90/include/ilcplex/cplex.h... yes
> checking whether symbol CPXgetstat is available with CPX... no
> configure: error: Cannot find symbol CPXgetstat with CPX
> configure: error: /bin/sh './configure' failed for Osi
>
> 2. Localizing the problem
> The error comes from configure in the Osi directory, from testing the
> CPLEX library. For this test, configure creates a file conftest.c, which
> won't link, causing the error. The error message from the linker is
> "conftest.c: undefined reference to `CPXgetstat'".
> I tried to build the file manually, with the same result.
>
> 3. Way around the problem
> It turns out that the configure script configures everything OK, i.e.
> the problem is in the test file conftest.c, not in the configuration.
> The "solution" is therefore to skip the test, by supplying an option
> "--disable-cplex-libcheck" to the configure script.
> This way, both the 'configure', 'make' and 'make test' works without
> further problems, as do the Osi examples...
>
>
> Regards,
> Michal Kaut
>
>
> ------------------------------
>
> Message: 2
> Date: Wed, 23 May 2007 11:15:30 -0400 (EDT)
> From: Andreas Waechter <andreasw at watson.ibm.com>
> Subject: Re: [Coin-discuss] problem with OSI and CPLEX on MinGW+MSYS
> To: Discussions about open source software for Operations Research
> 	<coin-discuss at list.coin-or.org>
> Message-ID: <Pine.A41.4.61.0705231113580.467002 at bigopt.watson.ibm.com>
> Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
>
> Hi Michal,
>
> Great, thanks for summarizing your experience and hints.
>
> It would be really great if you could put this onto the CoinHelp wiki
> pages.  We have a section there for user comments; yours seem to fit
> nicely in the "Comments and Tricks for Configuration" part.  The website
> is:
>
> https://projects.coin-or.org/CoinHelp/wiki/user-comments
>
> Thanks,
>
> Andreas
>
> On Wed, 23 May 2007, Michal Kaut wrote:
>
>> Hello,
>>
>> I have had a problem with the OSI configure script, when using Cplex 9.0
>> library, on Windows with MinGW+MSYS. I managed to localize the problem and
>
>> find the way around it, but I still do not know what the problem is and
> how
>> to correct it - and, most importantly, whether it is a problem with my
>> GCC/MinGW/MSYS configuration or a general issue.
>>
>> Anyway, I just thought that someone else might find the "solution"
> useful...
>>
>>
>> 1. The problem
>> I run ./configure -C, with the following options in a config.site file:
>> with_cplex_incdir=/g/Cplex90/include/ilcplex
>> with_cplex_lib="-L/g/Cplex90/lib/msvc6/stat_mda -lcplex90"
>> The script stops with an error; The last few lines of output are:
>> checking if user provides library for Cplex... yes
>> checking for /g/Cplex90/include/ilcplex/cplex.h... yes
>> checking whether symbol CPXgetstat is available with CPX... no
>> configure: error: Cannot find symbol CPXgetstat with CPX
>> configure: error: /bin/sh './configure' failed for Osi
>>
>> 2. Localizing the problem
>> The error comes from configure in the Osi directory, from testing the
> CPLEX
>> library. For this test, configure creates a file conftest.c, which won't
>> link, causing the error. The error message from the linker is
>> "conftest.c: undefined reference to `CPXgetstat'".
>> I tried to build the file manually, with the same result.
>>
>> 3. Way around the problem
>> It turns out that the configure script configures everything OK, i.e. the
>> problem is in the test file conftest.c, not in the configuration.
>> The "solution" is therefore to skip the test, by supplying an option
>> "--disable-cplex-libcheck" to the configure script.
>> This way, both the 'configure', 'make' and 'make test' works without
> further
>> problems, as do the Osi examples...
>>
>>
>> Regards,
>> Michal Kaut
>> _______________________________________________
>> Coin-discuss mailing list
>> Coin-discuss at list.coin-or.org
>> http://list.coin-or.org/mailman/listinfo/coin-discuss
>>
>
>
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