Building the source CLP on MS Visual Studio 2019

[vpranjal]

Hi

I was building the source code (CLP to start with: downloaded from https://www.coin-or.org/download/source/Clp/ version 1.17.6) on MS Visual Studio 2019 community edition on Windows 10.

It turns out there are some LNK1181 errors when building the Example.
Interestingly libClp and libCoinUtils build when tried independently (CoinUtils unit test also has the LNK1181 issue in that particular solution). Has anyone faced this issue before? Any ideas!

Thanks

[jhmgoossens]

I believe the sources you mention are nearly a year old. Could you try the same with the current? I'm doing some minor cleanup of the VS2019 solution (like #161). I'll also include the example projects.

[vpranjal]

Hi

I took the latest Clp from repo as a zip file and tried to work with the .sln file.
The latest .sln file appears to be in MSVisualStudio\v16\libClp

Building this libClp.sln multiple header files missing errors. I think that there are dependencies that prevent the .sln to be built directly?? Let me know if I am missing something here.

Thanks

[jhmgoossens]

:-) Yes, all the dependencies. Have a look at https://coin-or.github.io/user_introduction.html
In short, the advised way is to let coinbrew grab all the dependencies for you and do the build.

Personally, I prefer to build without coinbrew so git clone (or download as zip) the dependencies manually and build in Visual Studio. For Clp, this means to git clone Clp, CoinUtils, Osi, and BuildTools, and make sure they are in the same root folder (like repos/Clp, repos/CoinUtils, repos/Osi, repos/BuildTools) such that the relative paths in the solution & projects find each other. The VS2019 (v16) solutions and projects should work.

[jhmgoossens]

The Visual Studio files have been somewhat left behind. The VS2019 Clp solution should build without any other action.
The examples projects, indeed, have not been upgraded yet. Should not be too hard. Something for the ToDo list.

[jhmgoossens]

Please try again. Now (as of #183) the VS2019/v16 Clp solution has been added together with the v16 version of the mission example projects etc.

[vpranjal]

Thanks for the #183.
The build works now. I am able to run the .exes generated from the solution build and solve the sample data problem.

The build from Visual Studio run leads to

Is this expected? It works from the built exes. {I will be able to solve the problems I place in Data/Sample/}
I was expecting to build the source and walk through the solver solving it via debugger and understand it.

Let me know !!

[jhmgoossens]

It looks like you are trying to start libClp, but that is not possible because it is a library, not an application/exe itself. The exes use the libClp library, so you can use the example exes do step through etc.

[vpranjal]

Thanks for this- It works now- I had to change the startup project to ClpExamples- and things work in debug mode on Visual Studio.