On Sat, Oct 29, 2016 at 12:09 PM, Jakub Jelinek <ja...@redhat.com> wrote: > Apparently the driver reorders the options, -std=* options come before > all -f* options, so both of the following patches work the same, except > when cc1plus is invoked by hand. The first (inlined) patch solves it > more in line how e.g. -fgnu-keywords and similar options are handled, so I > think > it is preferable (and I've successfully bootstrapped/regtested it on > x86_64-linux and i686-linux). The second (attached) patch handles it > by not clearing -fext-numeric-literals during option processing > for -std=* options, just in post option handling clears it for the > strict c++11+ modes if the option is not specified explicitly. > If the driver wouldn't reorder the options, it would handle better > cases like -fext-numeric-literals -std=c++11 to mean the same thing > as -std=c++11 -fext-numeric-literals etc., but due to the reordering > it isn't needed and for consistency we'd also need to change -fgnu-keywords > etc.
I lean toward the second patch because it keeps the logic in a single place, but it looks like it doesn't currently handle C++98 differently. I don't think we need to change the handling of other options to match. Jason
