rt-thread-official/components/libc/compilers/common/SConscript

from building import *
Import('rtconfig')

src   = []
cwd   = GetCurrentDir()
group = []
CPPPATH = [cwd]
CPPDEFINES = []

if rtconfig.CROSS_TOOL == 'keil':
    CPPDEFINES += ['__CLK_TCK=RT_TICK_PER_SECOND']

src += Glob('*.c')

group = DefineGroup('Compiler', src, depend = [''], CPPPATH = CPPPATH, CPPDEFINES = CPPDEFINES)

list = os.listdir(cwd)
for item in list:
    if os.path.isfile(os.path.join(cwd, item, 'SConscript')):
        group = group + SConscript(os.path.join(item, 'SConscript'))

Return('group')