RFC: Replace -isysroot with --sysroot?

[Richard Sandiford]

Hans-Peter Nilsson <hans-peter.nilsson@axis.com> writes:
> So, can we add --sysroot, to affect the search paths as the
> configure-option --with-sysroot=... does, but as a compile-time
> option.

FWIW, I have a patch to do this, but I've been sitting on it
because I assumed the answer to this...

> Is this acceptable for 4.0?

...would be "no".  The patch affects the linker too btw.

Richard