gcc - Boost 1.58 code not building for 32 bit -

i trying build boost 1.58.0 code 32-bit. using below commands

./bootstrap.sh 

i have noticed: sets toolset

building boost.build engine toolset gcc... tools/build/src/engine/bin.linuxx86_64/b2

after ran,

./bjam install --toolset=gcc address-model=32 variant=release,debug link=static,shared -d2 -q -j4 --layout=versioned --prefix=$output_path_build  --without-python --without-mpi --without-wave --without-graph --without-math --without-test define=boost_log_use_char >> $log_file 

above command builds code 64-bit, expecting 32-bit. here out put in log_file

[----------- start building boost thu jan 28 23:17:06 pst 2016 performing configuration checks      - 32-bit                   : no  (cached)     - 64-bit                   : yes (cached)     - arm                      : no  (cached)     - mips1                    : no  (cached)     - power                    : no  (cached)     - sparc                    : no  (cached)     - x86                      : yes (cached)     - lockfree boost::atomic_flag : yes (cached) 

how build code 32 bit? using ubuntu 14.04 , gcc 4.8.

thanks.