[Coin-ipopt] Problem with Compiling hs071 in IpOpt 3.3.1 till 3.3.3 under VS 2005

Tue Oct 2 03:04:19 EDT 2007

Hi Andreas,

Thank you for pointing to the right direction (I am no buff at all with
regard to VS setups...)

In fact, my all project was in release. However I gave a shot to compile
the whole thing in debug (vcf2c.lib as well as per your comment) : this
works!

Found over the net that it was probably a VS set up issue, and after
running vsvars32.bat in Visual Studio \Common \ Tools to set up the
environment, I got to be able to compile the project in release mode. 

Now, I did that without compiling back vcf2c.lib for release. 

However, HS071 runs in 0.016 sec compared 0.14 sec in debug.

Weird, but good enough for me so far. 

Thank you very much for your help.

-----Original Message-----
From: Andreas Waechter [mailto:andreasw at watson.ibm.com] 
Sent: Monday, October 01, 2007 6:26 PM
To: Froidure, Tristan A
Cc: coin-ipopt at list.coin-or.org
Subject: Re: [Coin-ipopt] Problem with Compiling hs071 in IpOpt 3.3.1
till 3.3.3 under VS 2005

Hi Tristan,

We had some similar issues in other COIN projects.  It seems that the MS
compilers are not very happy with mixing objects that have been compiled
in debug mode and in optimized mode.

By default, the f2c library (vcf2c.lib) is compiled in optimized mode.
I assume that you are compiling the Ipopt code in debug mode?

Here my suggestion:

1. Try to see if things work fine if you compile the Ipopt projects also
in optimized mode (I guess the MS people call it "Release"...).  If that
works good.

2. If you still want to compile your Ipopt project in Debug mode, you
need to recompile the vcf2c.lib in debug mode as well.  I recently added
some comments on this in

https://projects.coin-or.org/BuildTools/browser/stable/0.5/compile_f2c/I
NSTALL

see lines 28-31 therein.

If this doesn't help, please create a ticket at the Ipopt wiki page.

Thanks

Andreas

On Mon, 1 Oct 2007, Froidure, Tristan A wrote:

>
> Hi All,
>
> I couldn't get to compile the MSVisualStudio v8 project entirely, as 
> some libs seems to conflict with each other.
>
> I used VS 2005, and have also VC6 installed.
>
> More precisely, after getting all third party code and having created 
> vcf2c.lib, I was able to compile all the libs in the VS project 
> (Blas,Lapack,HSL, and finally IpOpt).
>
> However the example couldn't link, and I got:
>
> 1>LINK : fatal error LNK1104: cannot open file 'libc.lib'
>
> As this is usually no big deal, I added libc.lib to : Configuration
> Properties->Linker->Input-> Ignore Specific Library
>
> I then get the following link errors:
>
> 1>LINK : warning LNK4098: defaultlib 'LIBCMT' conflicts with use of
> other libs; use /NODEFAULTLIB:library
> 1>vcf2c.lib(open.obj) : error LNK2001: unresolved external symbol 
> 1>_errno
> 1>vcf2c.lib(wrtfmt.obj) : error LNK2019: unresolved external symbol
> _errno referenced in function _w_ed
> 1>vcf2c.lib(endfile.obj) : error LNK2001: unresolved external symbol
> _errno
> 1>vcf2c.lib(sfe.obj) : error LNK2001: unresolved external symbol 
> 1>_errno
> 1>vcf2c.lib(fmt.obj) : error LNK2001: unresolved external symbol 
> 1>_errno
> 1>vcf2c.lib(wsfe.obj) : error LNK2001: unresolved external symbol 
> 1>_errno
> 1>vcf2c.lib(err.obj) : error LNK2001: unresolved external symbol 
> 1>_errno Release/hs071_cpp.exe : fatal error LNK1120: 1 unresolved 
> 1>externals
>
> Removing LIBCMT is no solution, and gives the same error.
>
> Hence, it seems that the old libs used by  vcf2c.lib and created by 
> nmake are conflicting with the new libs used by visual studio.
>
> I compiled vcf2c.lib directly under VS 2005 (and not VC6 or lower), 
> but could not get around the conflicts between the C Run Time
libraries....
>
> I made sure that all the projects are Multi-Threaded, and really don't

> see what to do from there.
>
> Could anyone help? I have a wonderfull math problem to solve 
> numerically and can't wait to go to the best part of the job....
>
>
>
>
>
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