How to change build directory in scons by using renesas compiler - scons

Question

I am using scons script to compile my code by using VC10 and renesas compiler.
i am successfully building my source code in variant directory by using VC10, But if i used the same script for the renesas compiler it is not building the obj files in variant directory.
can anyone tell me how to do that.
I am using renesas rx600 family controller.
My example tree look like
src1
-main.c
sconscript
sconstruct
subdirA
fileA.c
sconscript
subdirB
fileB.c
sconscript
src1/sconstruct contains
import os
env = Environment()
tmp_obj_list = []
env = Environment(ENV = {'PATH' : os.environ['PATH']})
env['LINKFLAGS'] = "/nologo /subsystem:console /pdb:project.pdb"
env['CCFLAGS'] = "/nologo /wd4355 /GR- /EHs-c- /MT /c /W3 /WX /Zi /FD"
env['ENV']['TMP'] = os.environ['TMP']
env['ENV']['TEMP'] = os.environ['TEMP']
Export('env')
env.SConscript('d://src1//subdirA//SConscript',
variant_dir = 'd://build1//subdirA',
duplicate = 0, exports = 'env')
tmp_obj_list.append(Glob('d://build1//subdirA' + '/*.lib'))
env.SConscript('d://src1//subdirB//SConscript',
variant_dir = 'd://build1//subdirB',
duplicate = 0, exports = 'env')
tmp_obj_list.append(Glob('d://build1//subdirB' + '/*.lib'))
env.SConscript('d://src1//SConscript')
env.Append(LIBS = tmp_obj_list)
src1/sconscript contains
Import('env')
env.Program('program',Glob('*.c'))
env.Clean('program','d://build1')
src1/subdirA & src1/subdirB sconscript contains
Import('env')
l = env.Library(target='subdirB', source='fileB.c')
Return('l')