compiler made by RSB

[Gedare Bloom]

On Tue, Mar 29, 2016 at 4:56 PM, Chris Johns <chrisj at rtems.org> wrote:
> On 30/03/2016 12:47 AM, 2654577874 wrote:
>> I'm new here,and followed the guide to make my own compiler by RSB。
>> is this tool made the best suitable compiler ?
>
> Yes.
>
>>  I'm not expert on this but
>> tools like crosstool-ng can configure detailly , for example if you config
>> a ARM cpu you choose armv6/armv7 , soft/hard float point unit etc。
>> precise configuration makes compiler generates  effective machine code?
>> in RSB I see only one config file for ARM。how does it adapt to all architecture
>> variants ？
>
> The RSB built GCC has multiple libraries or multilibs, one for each
> variant of the instruction set supported by the architecture. You select
> the specific cpu or machine using command line arguments and gcc selects
> the correct libraries etc. The GCC documentation provides more detail on
> these command line options.
>
> For examples of these options being used in RTEMS search for the .cfg
> files in the BSP directories (c/src/lib/libbsp/arm/...). They contain
> the options currently used.
>
That was a much better answer than my 5-hour lagged one.

> Chris
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