Part of:

• Meta-ticket: Set environment for subprocesses invoked by Sage #30818

Original issue description:

I have compiled sage with a local version of ffmpeg successfully by issuing these commands before running configure

export PATH="$HOME/opt/ffmpeg6/bin:$PATH"
export LD_LIBRARY_PATH="$HOME/opt/ffmpeg6/lib:$LD_LIBRARY_PATH"
export PKG_CONFIG_PATH="$HOME/opt/ffmpeg6/lib/pkgconfig:$PKG_CONFIG_PATH"

Now I would like to make sure that sage respects these environmental variables at run time. Should I put them in .sage/sagerc?

Running sage --sh, I found these two environmental variables

SAGE_ORIG_PATH

SAGE_ORIG_PATH_SET

I am trying to find some documentation on these but can't find any. Can someone explain to me what these are?

OS is Ubuntu 22.04, sage 9.8