Wiki
SCons / SavingVariablesToAFile
The SCons wiki has moved to https://github.com/SCons/scons/wiki/SavingVariablesToAFile
SCons has built-in facilities to save variables to a file and load them back - especially useful to store information like installation prefix (if you want to make an uninstall target, for instance), or the results of a configure step.
First create a Variables object
#!python # specify the name of the file in which variables are/will be stored vars = Variables('build-setup.conf') # Register which variables we're interested in and # get values from a saved file if any (defaults, which are # specified in the last argument, are used otherwise) vars.Add('config', '', 'release') vars.Add('prefix', '', '/usr/local') vars.Add('platform', '', 'auto') vars.Add('glut_enabled', '', False) vars.Add('havegettext', '', '') # update these variables in your environment vars.Update(env) # do your stuff with the variables if env['config'] == "debug": env.Append(CCFLAGS=['-g','-Wfatal-errors']) elif env['config'] == "release": env.Append(CCFLAGS=['-O3','-DNDEBUG']) # change variables if needed (e.g. if you're running a #'configure' step, or if environment changed) if changing_values: env['platform'] = "unix" # save new values vars.Save('build-setup.conf', env)
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