[Documentation] Specifically State that RPM's should not be built from inside a VENV

[bdorney]

Brief summary of issue

Due to known issues in the make process rpms or pip packages should never be built from inside a $VIRTUAL_ENV. We should add a subsection/warning/readily readable statement under the Building GEM Software section of the guide to explicitly state this.

Types of issue

• Bug report (report an issue with the code)
• Feature request (request for change which adds functionality)
• Documentation

Expected Behavior

Should explicitly state that you should not build inside a VENV.

Current Behavior

From the commands shown it's implied that you should not build from inside a VENV (e.g. if you follow the commands verbatim you would never enter a virtual environment).

Context (for feature requests)

New developers have issues when attempting to build packages because documentation is not clear, e.g. #38. The problem is not the developer here but the documentation for lacking this key statement.

Your Environment

• Version used:
• Shell used:

[bdorney]

@mexanick maybe one of your crew could tackle this issue?