[Gnash] how to set the second boost library path?

[new bee]

Hi, all:
  I have some problem in build gnash.I have compile and install a boost library by defualt,like this:
"bjam  install" .
as a result,  head files in /usr/local/include/boost-1_34/boost/  & libs in /usr/local/lib/.
After it, I build gnash by steps:./configure --disable-plugin
--disable-klash & make & make install and it work successfully
with this environment.

But now, I want build it all in my workspace for testing embedded
environment.so at first I build boost library to my workspace use this
command "bjam --prefix=/opt/workspace/host/common/build/opt  
install" 
and when I want to build gnash use boost library in my work space, I wrote like this:

./configure --prefix=/home/newbee/flashplayer  
--disable-plugin --disable-klash
--with-boost-incl=/opt/workspace/host/common/build/opt/include/boost-1_34/ 
--with-boost-lib=/opt/workspace/host/common/build/opt/lib 

But when it runs,it still check my boost library in /usr/local:
...
checking for boost header... -I/usr/local/include/boost-1_34
checking for Boost libraries... -L/usr/local/lib -lboost_date_time-gcc34-mt -lboost_thread
...
And finally it shows informations:
        POSIX Threads flags are: -pthread
        POSIX Threads lib is: -lpthread
        This version of libCurl doesn't have RTMP support
        CURL flags are: default include path
        CURL libs are: -L/usr/lib -lcurl
        BOOST flags are: -I/usr/local/include/boost-1_34
        BOOST libs are: -L/usr/local/lib -lboost_date_time-gcc34-mt -lboost_thread
....
Can you tell me how to set boost library path in /opt/workspace/host/common/build/opt/


Thank you!