[Buildroot] [PATCH] Config.in: add -Ofast option

[Yann E. MORIN <yann.morin.1998@free.fr>]

Thomas, All,

On 2018-03-25 22:40 +0200, Thomas Petazzoni spake thusly:
> On Sun, 25 Mar 2018 10:24:34 +0200, Yann E. MORIN wrote:
> > > +config BR2_OPTIMIZE_FAST
> > > +	bool "optimize for fast"  
> > 
> > -Ofast was introduced in gcc-4.6, so you need a dependency:
> >     depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_6
> 
> The "odd" thing being that menuconfig is organized as follows:
> 
>  Target options --->
>  Build options --->
>  Toolchain --->
> 
> The optimization level is selected in "Build options" and the compiler
> version is basically decided in "Toolchain".
> 
> So if you select -Ofast in Build options, and then go in Toolchain
> chose a < 4.6 compiler, your -Ofast selection would disappear.

Yeah, I know. But, as you ssay:

> But there's no good way around this, and using gcc < 4.6 is anyway very

... there's no good solution around this issue, and the case for gcc
before 4.6 is rare enough that we don't care abot those poor souls
anymore... :-/

> rare these days, so I also agree that the "depends on" you suggest is
> what makes the most sense.

Was that an Acked-by or a Reviewed-by? ;-)

Regards,
Yann E. MORIN.

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