How to skip a dependency?

[zoharl3]

Copying from here.

In my manifest, I specify that I want suitesparse. It has a dependency lapack, and another package (not even sure which) has a dependency openblas.

These two dependencies are installed and their libraries are added to my project without making a pip. I don't want them since I use intel-mkl instead.

Another scenario, cgal installs and sets boost without a pip. It decides on a version, and I can't override it.

How do I tell vcpkg to just install a library without its dependencies?

[autoantwort]

See here: https://devblogs.microsoft.com/cppblog/using-system-package-manager-dependencies-with-vcpkg/

You create an empty overlay port for these packages

[autoantwort]

This will skip the installation of lapack. It will also skip the installation of openblas, which is lapack's dependent (doesn't say so on the website).

It says so, it is a transitive dependency (lapack -> clapack -> blas -> openblas)

suitesparse still needs blas to built against when vcpkg installs it, and I can't specify at this point to use mkl.

You could create an overlay port so that suitesparse uses mkl.

If I create an empty overlay for boost, its installation is skipped. But I still need it, only a different version.

Use the versioning feature to specify which version of boost you want: https://learn.microsoft.com/en-us/vcpkg/consume/boost-versions

[zoharl3]

Thanks for the first two.

About boost. I've already specified an override version. It works if cgal isn't there. Otherwise, cgal overrides it, and my override is ignored. An example:

{
  "dependencies": [
    {
      "name": "cgal"
    },
    {
      "name": "boost"
    }
  ],
  "builtin-baseline": "edc84ff66e6262a9f7565c28eb76577aeab9c5aa",
  "overrides": [
    {
      "name": "cgal",
      "version": "5.6.1"
    },
    {
      "name": "boost",
      "version": "1.80.0"
    }
  ]
}

This installs boost 1.86.0 instead of 1.80.0.

[Osyotr]

I think you should specify boost version constraints in dependencies instead of overrides.
Note: boost is a metapackage which includes all of boost. You may want to use individual packages instead.

[autoantwort]

About boost. I've already specified an override version. It works if cgal isn't there. Otherwise, cgal overrides it, and my override is ignored. An example:

This is exactly what is explained and solved in https://learn.microsoft.com/en-us/vcpkg/consume/boost-versions