Symlinked rustc can't find sysroot

[brson]

On OS X at least, it will think the link itself is the executable, then calculate sysroot based on that. Thanks to kyle for the report.

[graydon]

nominating to change to production ready

[graydon]

accepted for production-ready milestone

[metajack]

triage bump. still annoying.

[kud1ing]

fs::readlink() or io::fs::readlink() could be used to resolve the symlink.
Would this issue warrant the badge "E_easy"?

[alexcrichton]

Seems so! Adding the E-easy label.

[alexcrichton]

Note that the relevant code is here and it probably needs a check to see whether self_exe_path is a symlink or not.

[pnkfelix]

seems important to fix for polish reasons. Accepted for P-high.