Re: Add ToLower .opt facility

[Nick Clifton <nickc@redhat.com>]

Hi Joseph,

> This patch adds a ToLower .opt feature, for option arguments that are
> case-insensitive and should be converted to a canonical lowercase
> form.
>
> This is relevant to at least mips, mn10300 and rx.  This patch makes
> rx use it, thereby causing an existing spec that tested only for a
> lowercase option form to start to work correctly with both variants
> (since specs only need to match canonical options).

Thanks!

> Bootstrapped with no regressions on x86_64-unknown-linux-gnu, and
> tested building cc1 and xgcc for cross to rx-elf.  Will commit to
> trunk in the absence of target maintainer objections.

No objections and definite approval from me.

> 2011-04-01  Joseph Myers<joseph@codesourcery.com>
>
> 	* doc/options.texi (ToLower): Document.
> 	* opt-functions.awk (switch_bit_fields): Initialize cl_tolower
> 	field.
> 	* opts-common.c (decode_cmdline_option): Handle cl_tolower.
> 	* opts.h (cl_option): Add cl_tolower field.
> 	* config/rx/rx.c (rx_handle_option): Use strcmp of -mcpu=
> 	arguments with lowercase strings.
> 	* config/rx/rx.opt (mcpu=): Add ToLower.
> 	* config/rx/t-rx (MULTILIB_MATCHES): Don't handle uppercase -mcpu=
> 	argument.

Cheers
   Nick