How to let libtool not link with c++ and gcc

I am porting the openembedded build system for building the Android target. I don't want to use libgcc in Android since its uses a bionic and LLVM c++ combine environment.
I am suffering a problem with libtool, it would try to link library c++ and gcc. I think it is the value in the ${host}-libtool causes that.
postdeps="-lc++ -lm -lgcc -ldl -lc -lgcc -ldl"

I try to understand the script ltmain.sh, but I can't figure out where that '-lgcc' comes from. Could someone give me some tips here ? 

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