[chenla] Spack exercise

[lingachen]

No description provided.

[lingachen]

Complete an optional task:

Make the current dependencies (Boost, yaml-cpp) optional by defining suitable options in the CMakeLists.txt which are also picked up in the C++ code. Then add corresponding variants in the Spack recipe which allow to turn on/off these features.

You could still install the release version from the upstream repo with:

spack install [email protected]
spack install [email protected]
spack install [email protected]

For the task, I created a branch for edited CMakeLists.txt and main.cpp in my forked repo. Then, you could install the code from the branch with:

spack install spack-exercise@optional-dependencies

By default, boost and yaml-cpp are not installed. You could enable them by adding +boost and +yaml respectively. For example:

spack install spack-exercise@optional-dependencies+boost # enable boost
spack install spack-exercise@optional-dependencies+yaml # enable yaml
spack install spack-exercise@optional-dependencies+boost+yaml # enable boost and yaml

The command spackexample [path_to_config.yaml] can be executed successfully (but with different output) under all conditions.

[IshaanDesai]

Nicely done 👏