RFC: Replace -isysroot with --sysroot?

[Mike Stump]

On Dec 1, 2004, at 10:20 AM, Hans-Peter Nilsson wrote:
> As it stands, -isysroot only affects header include search path.
> The name is then right: for me, the leading "i" stands for
> include path.  However, it's not really useful (at a glance at
> least);

We find it useful.

> So, can we add --sysroot, to affect the search paths as the
> configure-option --with-sysroot=... does, but as a compile-time
> option.

How is this different than what we already do when the compiler is run 
from an alternate place?