Optionally keep intermediate file listings in order to do comparisons between builds.

[tzarc]

Description

Adds a new flag to the build -- KEEP_INTERMEDIATES=yes -- which instructs the compiler to keep the post-preprocessor output in .build as a sibling to the object file output that the compiler created.

This can then be diff'ed between builds in order to determine if preprocessor or include ordering etc. changes outputs.

Also factors in with the SHA1 verifications, so that code-wise differences can be determined, rather than looking at assembly.

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Keyboard (addition or update)
• Keymap/layout/userspace (addition or update)
• Documentation

Checklist

• My code follows the code style of this project: C, Python
• I have read the PR Checklist document and have made the appropriate changes.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).