Issue 1714 - Field and GradientPack and FieldDerivativesPack implementation

[lsawade]

Description

Issue Number

Closes #1714

Checklist

Please make sure to check developer documentation on specfem docs.

• I ran the code through pre-commit to check style
• THE DOCUMENTATION BUILDS WITHOUT WARNINGS/ERRORS
• I have added labels to the PR (see right hand side of the PR page)
• My code passes all the integration tests
• I have added sufficient unittests to test my changes
• I have added/updated documentation for the changes I am proposing
• I have updated CMakeLists to ensure my code builds
• My code builds across all platforms

[lsawade]

running out of memory in clang

[Rohit-Kakodkar]

running out of memory in clanif unity build is not disabled for the target, does disabling it help?

[lsawade]

Haven't tried, but doubt it since it's just the specfem_solver target which is expanded to 1,000,000 lines before crashing(I looked at the /tmp/time_marching<#id>.cpp).

But one solution could be:

compute_sources.tpp

template<NGLL, Tags>
int compute_source_interaction(assembly, step) {

   FOR_EACH_IN ...

compute_sources.cpp

template int compute_sources<...>

etc.

This could be done with some fairly simple macros.

That way, the different physics are put into different translation units before being called by update_wavefields(...).

[lsawade]

fails are due to yaml installation

[lsawade]

test this please

[Rohit-Kakodkar]

df_dxi, df_dgamma and df_deta should be register arrays. RegisterArray<type_real, dimension, components>