[GNC-dev] Building MacOS/Quartz from source: environment PREFIX, CXXFLAGS, etc?

[Jim DeLaHunt]

Hi,

I am trying to build GnuCash 4.11 from source  on macOS 12.6 (M1 CPU), 
following the instructions at https://wiki.gnucash.org/wiki/MacOS/Quartz .

I have finished the preliminaries, so I appear to have jhbuild running. 
I encounter difficulty with the command:

jhbuild bootstrap-gtk-osx

It throws a succession of Python KeyErrors, looking for environment 
variables PREFIX, CXXFLAGS, and I assume CC and CFLAGS as well. For instance

% jhbuild bootstrap-gtk-osx
Loading .env environment variables...
Traceback (most recent call last):
   File "/Users/gtkdeveloper/Source/jhbuild/jhbuild/config.py", line 194, in load
     execfile(filename, config)
   File "/Users/gtkdeveloper/Source/jhbuild/jhbuild/utils/compat.py", line 67, in execfile
     exec(code, globals, locals)
   File "/Users/gtkdeveloper/.config/jhbuildrc", line 474, in <module>
     exec(compile(open(_user_rc, "rb").read(), _user_rc, 'exec'))
   File "/Users/gtkdeveloper/.config/jhbuildrc-custom", line 3, in <module>
     prefix = os.environ['PREFIX']
   File "/Users/gtkdeveloper/.new_local/share/pyenv/versions/3.10.2/lib/python3.10/os.py", line 679, in __getitem__
     raise KeyError(key) from None
KeyError: 'PREFIX'
jhbuild: could not load config file
%

The wiki page MacOS/Quartz does not mention these environment variables.

Where are they described?  What values should I assign for them? I would 
appreciate a link to whatever page I should read next.

Thanks,
     —Jim DeLaHunt