Specs vs static linkage?

Hi everyone:

   I am trying to add a new option into specs file, say -xxxx, for
   g++. I'd like to let gcc substitute -xxxx to some compile options and
   some libraries. So I modify specs file to:

*cclplus:
%{xxxx: -I/usr/local/include/xxxx }

   And then:

*lib:
%{xxxx: -llocal_xxxx}

   While I am compiling program without -static option,for example g++
   -xxxx t.cpp, my modification just works.

   But while -static is given, gcc failed to compile, and I am forced
   to compile it via g++ -xxxx t.cpp -llocal_xxxx. This problem should
   be due to libraries dependence, how can I avoid it?