我如何才能把以-I开头的内容都去掉(前题是必须位于CXXFLAGS子项中)
app_LDDFAGS= "-I XX"
app_CXXFLAGS = 
                -I.. -I../.. 
                -I$(MMX_PATH)/oam/lib 
                -I$(MNODE_PATH)/gan 
                -I$(MMX_PATH) 
                -I$(VENDOR_PATH) 
                -I$(MMX_PATH)/inc 
                -I$(MMX_PATH)/common 
                -I$(MMX_PATH)/oam/include 
                -I$(MNODE_PATH)/subMgr 
                -I$(MNODE_PATH)/imgSubMgr 
                -I$(MNODE_PATH)/honMgr 
                -I$(MNODE_PATH)/mainCC 
                -I$(MMX_PATH)/common 
                -I$(MMX_PATH)/mxLog 
                -I$(MMX_PATH)/mmx/mxLog/inc 
                -I$(MMX_PATH)/mxLog/inc 
                -I$(MMX_PATH)/oam/src/evm/inc 
                -I$(MMX_PATH)/oam/src/tmm 
                -I$(MMX_PATH)/commMgr/commLib/inc  
                -I$(MNODE_PATH)/gan/ganms 
                -I$(MNODE_PATH)/gan/gannet 
                -I$(MNODE_PATH)/gan/common 
                -I$(MNODE_PATH)/gan/gprsBridge 
                -I$(MNODE_PATH)/gan/ganMgr 
                -I$(MNODE_PATH)/mgc 
                -I$(MNODE_PATH)/aif/netmm/src 
                -I$(MNODE_PATH)/aif 
                -I$(MNODE_PATH)/aif/mscc
                -I$(MNODE_PATH)/aif/msmm 
                -I$(MNODE_PATH)/aif/msmm/inc 
                -I$(MNODE_PATH)/parser/base 
                -I$(MNODE_PATH)/parser/gsm 
                -I$(MNODE_PATH)/parser/uma 
                -I$(MNODE_PATH)/parser/bssap 
                -I$(MNODE_PATH)/parser/xml 
                -I$(MNODE_PATH)/aif/netmm 
                -I$(MNODE_PATH)/sipUA 
                -I$(MNODE_PATH)/switch 
                -I$(VENDOR_PATH)/mbedthis/appWeb/appWeb-2.0.4/appWeb 
                -I$(VENDOR_PATH)/mbedthis/appWeb/appWeb-2.0.4/http 
                -I$(VENDOR_PATH)/mbedthis/appWeb/appWeb-2.0.4/http/modules 
                -I$(VENDOR_PATH)/mbedthis/appWeb/appWeb-2.0.4/esp 
                -I$(VENDOR_PATH)/mbedthis/appWeb/appWeb-2.0.4/ejs 
                -I$(VENDOR_PATH)/mbedthis/appWeb/appWeb-2.0.4/mpr 
                -I$(VENDOR_PATH)/mbedthis/appWeb/appWeb-2.0.4 
                -I$(VENDOR_PATH)/trillium/Common        
                -I$(VENDOR_PATH)/trillium/MAP           
                -I$(VENDOR_PATH)/trillium/SSUnix        
                -I$(VENDOR_PATH)/trillium/SysCommon 
                -I$(HSSUA_PATH)/uatk_headers 
                -I$(HSSSTACK_PATH)/stack_headers 
                -DLINUX -D_REENTRANT

要求留下:
app_LDDFAGS= "-I XX"
app_CXXFLAGS = 
                -DLINUX -D_REENTRANT

resultVal=$(echo   ${app_CXXFLAGS} ¦sed     -i   's/^'${app_LDDFAGS}'//')
刚才写错了