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dellair jie: please focus on one issue at a time. The issue you reported here is the compile error with si_band; I will not discuss any other problems you bring up in this issue.
Note that editing pyconfig.h is not a solution. It's a generated file, so it must not be edited.
To diagnose this further, add the -dD option to the preprocessor output of signalmodule.c, i.e. run
gcc -dD -Wno-unused-result -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I. -IInclude -I./Include -DPy_BUILD_CORE -E ./Modules/signalmodule.c 
and attach the resulting file (or else study the output yourself).
BTW, please also understand that Python 3.3 is no longer maintained; it would be good if you could run this porting project on Python 3.4 instead.