Could I just ask what you changed between this and the Linux build to get it up and running (if not just a case of re-compiling from source...)
I'd be interested in getting the tool chain running in osx so I don't have to keep booting into a VM to compile all the time :p
linux toolchain is built with buildroot, cygwin toolchain is built with crosstool-ng
linux toolchain has gcc 4.8.2, cygwin one has gcc 4.9.1
linux toolchain's binutils support xburst instructions, cygwin's don't (I didn't know how to patch them properly)
Apart from these changes, everything else is identical (libraries are copied from linux toolchain).
If you'd like to make osx toolchain, try use crosstool-ng, however there are some restrictions. I don't have access to any Mac, sorry. Or, using wine for osx could be a solution.