Hi All,

This is an update to the patch rebased to after the SVE2 options have been merged.

Bootstrapped Regtested on aarch64-none-linux-gnu and no issues.

Ok for trunk?

Thanks,
Tamar

> -----Original Message-----
> From: gcc-patches-owner@gcc.gnu.org <gcc-patches-owner@gcc.gnu.org>
> On Behalf Of Tamar Christina
> Sent: Tuesday, May 21, 2019 18:00
> To: gcc-patches@gcc.gnu.org
> Cc: nd <nd@arm.com>; James Greenhalgh <James.Greenhalgh@arm.com>;
> Richard Earnshaw <Richard.Earnshaw@arm.com>; Marcus Shawcroft
> <Marcus.Shawcroft@arm.com>
> Subject: [PATCH][GCC][AArch64] Make processing less fragile in config.gcc
> 
> Hi All,
> 
> Due to config.gcc all the options need to be on one line because of the grep
> lines which would select only the first line of the option.
> 
> This causes it not to select the right bits on options that are spread over
> multiple lines when the --with-arch configure option is used.  The issue
> happens silently and you just get a compiler with an incorrect set of default
> flags.
> 
> The current rules are quite rigid:
> 
>    1) No space between the AARCH64_OPT_EXTENSION and the opening (.
>    2) No space between the opening ( and the extension name.
>    3) No space after the extension name before the ,.
>    4) Spaces are only allowed after a , and around |.
> 
> This patch makes this a lot less fragile by using the C pre-processor to flatten
> the list and then provides much more flexible regex using group matching to
> process the options instead of string replacement.  This removes all the
> restrictions above and makes the code a bit more readable.
> 
> Bootstrapped Regtested on aarch64-none-linux-gnu and no issues.
> 
> Ok for trunk? and for eventual backport?
> 
> Thanks,
> Tamar
> 
> gcc/ChangeLog:
> 
> 2019-05-21  Tamar Christina  <tamar.christina@arm.com>
> 
> 	PR target/89517
> 	* config.gcc: Relax parsing of AARCH64_OPT_EXTENSION.
> 	* config/aarch64/aarch64-option-extensions.def: Add new
> comments
> 	and restore easier to read options.
> 
> --