GHC master, not compiling on Archlinux
/usr/bin/ld: -r and -pie may not be used together
It appears on Archlinux, with GCC version 5.3.0, there's an implicit -pie flag passed to
ld. I looked into compiler/main/DriverPipeline.hs at joinObjectFiles, it is unconditionally doing "-Wl,-r", thus the error above.
One suggested fix on IRC is to modify getCompilerInfo to know if the compiler supports -no-pie, then conditionally add that to flags that are used. I tried and got somewhere lost in compiler/main/DynFlags.hs. (Completely new to GHC)
This has bitten Go developers recently as well: https://go-review.googlesource.com/\#/c/18359/
Hopefully someone can figure it out, it seems important for development and I really want to get involved :)