LTO support for CLANG

[alie]

Hi,

I just saw these lines:

0) build gold and libLLVMgold.so (see http://llvm.org/docs/LinkTimeOptimization.html)
1) CFLAGS+=-emit-llvm
2) setenv LD "/tmp/ld-new --plugin /tmp/libLLVMgold.so"
3) setenv CC clang
4) build the kernel

From http://wiki.freebsd.org/BuildingFreeBSDWithClang

There is no way to build the gold when i check http://llvm.org/docs/LinkTimeOptimization.html

Anyone have steps/how-to to build the gold? please help.