--- a/SConstruct
+++ b/SConstruct
@@ -134,21 +134,21 @@ env = Environment(
 
 # handle options/environment varibles.
 if 'CC' in os.environ:
-  env.Replace(CC = os.environ['CC'])
+  env.Replace(CC = Split(os.environ['CC']))
 
 # CFLAGS
 if GetOption("cflags") != "":
   env.Append(CFLAGS = GetOption("cflags"))
 elif 'CFLAGS' in os.environ:
-  env.Append(CFLAGS = os.environ['CFLAGS'])
+  env.Append(CFLAGS = Split(os.environ['CFLAGS']))
 
 # LDFLAGS
 if GetOption("ldflags") != "":
   env.Replace(LINKFLAGS = GetOption("ldflags"))
 elif 'LDFLAGS' in os.environ:
-  env.Replace(LINKFLAGS = os.environ['LDFLAGS'])
+  env.Replace(LINKFLAGS = Split(os.environ['LDFLAGS']))
 elif 'LINKFLAGS' in os.environ:
-  env.Replace(LINKFLAGS = os.environ['LINKFLAGS'])
+  env.Replace(LINKFLAGS = Split(os.environ['LINKFLAGS']))
 
 # LIBS
 if GetOption("libs") != "":
@@ -192,15 +192,6 @@ else:
 # autoconf
 conf = Configure(env, custom_tests = {'CheckEpoll' : CheckEpoll, 'CheckSelect' : CheckSelect, 'CheckKqueue' : CheckKqueue, 'CheckEndian' : CheckEndian})
 
-# Endian check
-endian = conf.CheckEndian()
-if endian == 'Big':
-  env.Append(CFLAGS = ["-DBIG_ENDIAN"])
-elif endian == 'Little':
-  env.Append(CFLAGS = ["-DLITTLE_ENDIAN"])
-else:
-  raise SConfError("Error when testing the endian.")
-
 # built-in event loop check
 if GetOption("transport") == 'built-in' or GetOption("transport") == '':
   if GetOption("evloop") == 'epoll':