[question] Why do the dependencies of `armadillo` not exist in ConanCenter?

[hwhsu1231]

According to this PR: https://github.com/conan-io/conan-center-index/pull/7334, armadillo has some dependencies, which are not yet available in ConanCenter. For example:

• mlpack: https://github.com/conan-io/conan-center-index/issues/9747
• ensmallen: https://github.com/conan-io/conan-center-index/issues/6797

I'm wondering why armadillo exists in ConanCenter, but some of its dependencies are not available in ConanCenter.

[samuel-emrys]

These are not dependencies of armadillo - they are libraries that have a dependency on armadillo. Armadillo has optional dependencies on the following, which are also awaiting recipes:

• https://github.com/conan-io/conan-center-index/issues/6757
• https://github.com/conan-io/conan-center-index/issues/6756
• https://github.com/conan-io/conan-center-index/issues/6755
• https://github.com/conan-io/conan-center-index/issues/6827
• https://github.com/conan-io/conan-center-index/issues/4509
  • LAPACK is actually available through openblas, however isn't currently built by default because no fortran compilers are available on CCI's windows build agents. Setting the option use_lapack=openblas will force openblas to build with lapack and armadillo to link against this.

Now that armadillo is available in CCI, recipes can be created for mlpack and ensmallen. Feel free to contribute them if you have the need :)

[Croydon]

Since this was only a question and all related packages to this question have individual issues, this can be closed