Problem when compiling and running the code

[jamlemoos]

Hello, I have a problem compiling and running the code. Does anyone have a step-by-step how to compile after cloning the project?

[jajhall]

What is your operating system, and do you want to call HiGHS from an application, or just run the executable?

[jamlemoos]

Hi Julian, thanks for the quick answer. I want to use HiGHS from a compiler. So, I am doing the following steps:

1 - I clone the project on the pc;
2 - I go to the directory where I cloned;
3 - I use mkdir build;
4 - I use cd build;
5 - I do cmake --build .
6 - I try to compile using "g++ -o use_highs use_highs.cpp" in the build folder;

Then, when I do that it says that there is no executable file for use_highs.cpp or just highs.cpp in both the build and the HiGHS root. My PC uses the Ubuntu subsystem via WSL2.

[jajhall]

Thanks for this. Are you on Windows, MacOS or Linux?

…

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________________________________ From: Jamilli Lemos ***@***.***> Sent: Wednesday, April 5, 2023 1:19:19 PM To: ERGO-Code/HiGHS ***@***.***> Cc: Julian Hall ***@***.***>; Comment ***@***.***> Subject: Re: [ERGO-Code/HiGHS] Problem when compiling and running the code (Discussion #1242) This email was sent to you by someone outside the University. You should only click on links or attachments if you are certain that the email is genuine and the content is safe. Olá, Julian, obrigada pela resposta rápida. Então, eu to fazendo os seguintes passos: 1 - Clono o projeto na máquina; 2 - Vou ao diretório onde clonei; 3 - Utilizo o mkdir build; 4 - Utilizo o cd build; 5 - Faço o cmake --build . — Reply to this email directly, view it on GitHub<#1242 (reply in thread)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AFMWLYZR2PWEPYWVBJ5TAZLW7VPMPANCNFSM6AAAAAAWTNDB6A>. You are receiving this because you commented.Message ID: ***@***.***> The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. Is e buidheann carthannais a th’ ann an Oilthigh Dhùn Èideann, clàraichte an Alba, àireamh clàraidh SC005336.

[jamlemoos]

I'm using Windows 10 and Ubuntu Subystem (linux) via WSL2.

[jajhall]

Thanks for the re-clarification of your OS: I was responding to the original reply in Portuguese

[jajhall]

I'm puzzled by your reference to use_highs.cpp or highs.cpp. There are no such files in the HiGHS repository. There is src/lp_data/Highs.cpp, but that isn't a main C++ file that would yield an executable.

The command cmake --build should yield the executable build/bin/highs, and that is how you run HiGHS from the command line

[jamlemoos]

Sorry, I ended up putting the wrong file here in the discussion. When I try to compile with both make and g++ it gives an error regarding the structure of the project, to be more precise, about how the files are being imported into each other. For example, when I try to compile the MIP solver I get this error:

I tried to change the import of some files but it only works when they are in the same folder, for example if it is in the MIP folder, I remove the "mip/" and leave only the file itself and then it works. But when there are files from other folders it also gives the error and I have tried to import in different ways but it always breaks. When I open from Visual Studio I can access everything correctly by clicking with cntrl on the import in the way it comes structured from git. I wonder if I have to change something about the structure in a makefile?

[jajhall]

HiGHS isn't used this way at all.

When you run cmake --build, all the of the source code of HiGHS is built. After you've done this you can run HiGHS using the executable bin/highs or, if you want to call HiGHS from an application, link it using the library in lib/

There's a lot more help available in via https://ergo-code.github.io/HiGHS/dev/

If you've been changing the structure of the HiGHS source files, then I suggest that you delete what you've cloned or checked out, and start again.

[jamlemoos]

Hi, @jajhall, I did what you said and followed the step-by-step and was able to compile from the following form:

./bin/highs --solver=simplex ../check/instances/afiro.mps

I saw that the solver options are only simplex and ipm, is there any way to run it using mip as the solver?

[jajhall]

HiGHS uses the MIP solver when the model it has is a MIP.

afiro is an LP, when the choice between simplex and IPM is valid.

If you run

./bin/highs ../check/instances/flugpl.mps

then, because this is a MIP, you see the MIP solver output.