Build Error

host Executable: aapt (out/host/linux-x86/obj/EXECUTABLES/aapt_intermediates/aapt)
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.4.3/../../../libz.so when searching for -lz
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.4.3/../../../libz.a when searching for -lz
/usr/bin/ld: skipping incompatible /usr/lib/libz.so when searching for -lz
/usr/bin/ld: skipping incompatible /usr/lib/libz.a when searching for -lz
/usr/bin/ld: cannot find -lz
collect2: ld returned 1 exit status
make: *** [out/host/linux-x86/obj/EXECUTABLES/aapt_intermediates/aapt] Error 1

I am getting this error when i give ICS for build.My machine is 64 bit.can anyone tell me what is the problem?