ARM64 cross-compiler and --sysroot GNU C option.

[Karel Gardas]

Folks,

just for fun I've built GHC cross-compiler for ARM64 platform using LLVM 
backend. I've documented it here: 
https://ghcarm.wordpress.com/2014/01/18/unregisterised-ghc-head-build-for-arm64-platform/

and I'm writing here just to ask if you think adding --with-gcc-sysroot 
option (or kind of it) to GHC's configure may be a good idea or not 
(i.e. you consider using shell script wrapper which passes --sysroot 
option to the GNU C cross compiler perfectly adequate for this job -- 
like I did in blog post above). See also #7754 which shows the same problem.

Thanks!
Karel