optparse/SConscript

import os
from building import * 

# get current dir path
cwd = GetCurrentDir()

# init src and inc vars
src = Glob('*.c')
inc = [cwd]

# add group to IDE project
group = DefineGroup('optparse', src, depend = ['PKG_USING_OPTPARSE'], CPPPATH = inc)

# traversal subscript
list = os.listdir(cwd)
if GetDepend('PKG_USING_OPTPARSE'):
    for d in list:
        path = os.path.join(cwd, d)
        if os.path.isfile(os.path.join(path, 'SConscript')):
            group = group + SConscript(os.path.join(d, 'SConscript'))

Return('group')