[Cbc] VS 2019 Cbc build problems

[Jan-Willem Goossens]

Stefan,

Thanks for the libCoinUtils fix and the WSMP_FUNC suggestion!
Currently, for me none of the Cbc/Clp/Cgl Visual Studio projects build ‘out of the box’—without config.

For WSMP_FUNC, I compared the older stable Clp Visual Studio v10 project, and indeed all such special functions are by default Excluded from the project. I propose the same for the v16 project.

For libCoinUtils, and similar issue with the new xxxLIB_EXPORT, the Visual Studio projects can simply be the plain vanilla builds to work out of the box, without any external components. But for that the sections for xxLIB_EXPORT in the relevant config_default.h and config_xxx_default.h need a minor fix:
#ifndef COINUTILSLIB_EXPORT
#ifdef _WIN32
#ifdef DLL_EXPORT
/* assuming we build a CoinUtils DLL */
#define COINUTILSLIB_EXPORT __declspec(dllexport)
#else
#define COINUTILSLIB_EXPORT
#endif
#endif
#endif
(so use DLL_EXPORT, as in CoinUtilsConfig.h)
Since all VS projects are set to build Static Lib rather than DLLs.
Similar fixes can be applied to Cbc (and CbcSolver), Cgl and Clp (and OsiClp).

Cbc\src\CbcSolverConfig.h  (ifdef CBCSOLVER_BUILD -> ifdef DLL_EXPORT)
Cbc\src\config_default.h
Cbc\src\config_cbc_default.h
Cgl\src\CglCommon\config_default.h
Cgl\src\CglCommon\config_cgl_default.h
Clp\src\config_default.h
Clp\src\config_clp_default.h
Clp\src\OsiClp\OsiClpConfig.h (ifdef OSICLP_BUILD -> ifdef DDL_EXPORT)

If that’s a reasonable approach, I can create some PRs for the above to make all these projects and solutions build using Visual Studio and v16 projects and solutions.
On the other hand, I might be going the wrong direction..

Thanks for your help.
Regards,

Jan-Willem

From: Stefan Vigerske<mailto:svigerske at gams.com>
Sent: Monday, February 3, 2020 10:58 AM
To: Jan-Willem Goossens<mailto:jhmgoossens at hotmail.com>; cbc at list.coin-or.org<mailto:cbc at list.coin-or.org>
Subject: Re: [Cbc] VS 2019 Cbc build problems

Hi,

On 2/2/20 10:09 PM, Jan-Willem Goossens wrote:
> Dear all,
>
> I’m trying to build the latest (master) Cbc using Visual Studio 2019 and the v16 solution, together with the latest master of all relevant related repos (BuildTools, CoinUtils, Cgl, etc., etc.)
>
> First, I encountered an issue loading the Cbc solution, due to a ReleaseParallel configuration, but I think I worked around that.
> Next, libCoinUtils wouldn’t compile, due to a #define COINUTILSLIB_EXPORT was missing.

This might be fixed now.

> After that, libClp wouldn’t compile, due unknown WSMP_FUNC in ClpCholeskyWssmp.cpp.

Then you should add a define for WSMP_FUNC according to the name
mangling scheme that your Wsmp library uses.
That is, if you don't have Wsmp, don't try to build ClpCholeskyWssmp.cpp.

> By now, I’m wondering what I’m might be doing wrong?

The main supported buildsystem for CoinUtils, Clp, Cbc, etc is the
autotools-based system, which should work with MS compilers under MSys2
on Windows, too.
This buildsystem has been updated in the master branches, that is, the
current development versions of CoinUtils, Clp, Cbc, etc., recently,
which also brought some changes to the code itself. This very likely
broke these MSVS project files. Noone looked into fixing these so far.

Stefan

> Thank you for any help.
>
> Regards,
>
> Jan-Willem
> (BTW, eliminate root directory was a great move)
>
>
>
>
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