[PATCH] PR driver/69265: improved suggestions for various misspelled options

[Bernd Schmidt]

On 02/09/2016 09:44 PM, David Malcolm wrote:
> This is a bug in a new feature, so it isn't a regression as such, but
> it's fairly visible, and I believe the fix is relatively low-risk
> (error-handling of typos of command-line options).
>
> This also now covers PR driver/69453 (and its duplicate PR
> driver/69642), so people *are* running into this.

I think the patch looks reasonable (I expect it needs slight adjustment 
after an earlier sanitizer options change). Whether it's OK or not at 
this stage is something I think I'll want to ask a RM. My inclination 
would be yes.

A small improvement might be calculating the candidates array only once 
when making the first suggestion and not freeing it. BTW, I've also run 
into a case of an unhelpful suggestion:

./cc1 ~/hw.c -fno-if-convert
cc1: error: unrecognized command line option ‘-fno-if-convert’

which should instead suggest fno-if-conversion.


Bernd