How to compile ghc 7.6.2 with llvm?

Hi, I am using Linuxmint Nadia with clang and llvm-3.0 installed. Then I `mv build.mk.sample build.mk`, set "BuildFlavour = perf-llvm", add "GhcWithLlvmCodeGen = YES". Finally `./configure --with-gcc=/usr/bin/llvm-gcc`. Configure output attached. After make, I tried `inplace/bin/ghc-stage2 –info`, it is still using native code generator. What should I do? config.loghttps://docs.google.com/file/d/0BzTVWOyY2ZO4SXRqdnUzdE5WREk/edit -- 竹密岂妨流水过 山高哪阻野云飞 And for G+, please use magiclouds#gmail.com.