[PATCH] Set default to -fomit-frame-pointer

[Joseph Myers]

On Fri, 3 Nov 2017, Wilco Dijkstra wrote:

> Almost all targets add an explict -fomit-frame-pointer in the target specific
> options.  Rather than doing this in a target-specific way, do this in the

Which targets do not?  You should explicitly list them and CC their 
maintainers and seek confirmation that such a change is appropriate for 
them.

The addition of -fomit-frame-pointer through this mechanism was a 
replacement for the old target macro CAN_DEBUG_WITHOUT_FP.  It may now be 
the cases that with DWARF debug info, having or not having a frame pointer 
is not particularly relevant to debugging.  But since there are other 
reasons people may want a frame pointer (e.g. light-weight backtraces that 
don't depend on debug / unwind info), it's at least possible there are 
architecture-specific choices regarding keeping frame pointers involved 
here.

-- 
Joseph S. Myers
joseph@codesourcery.com