[PATCH] build: Export BSP base and family via pkg-config

[Sebastian Huber]

On 25.07.23 19:15, Gedare Bloom wrote:
> On Tue, Jul 25, 2023 at 11:11 AM Sebastian Huber
> <sebastian.huber at embedded-brains.de>  wrote:
>>
>>
>> On 25.07.23 18:01, Gedare Bloom wrote:
>>> On Tue, Jul 25, 2023 at 5:13 AM Sebastian Huber
>>> <sebastian.huber at embedded-brains.de>   wrote:
>>>> This allows application and library build systems to derive option
>>>> values from the BSP base and family names.
>>>> ---
>>>>    spec/build/bsps/pkgconfig.yml | 2 ++
>>>>    1 file changed, 2 insertions(+)
>>>>
>>>> diff --git a/spec/build/bsps/pkgconfig.yml b/spec/build/bsps/pkgconfig.yml
>>>> index e08c83fe27..afaffbbf0f 100644
>>>> --- a/spec/build/bsps/pkgconfig.yml
>>>> +++ b/spec/build/bsps/pkgconfig.yml
>>>> @@ -15,6 +15,8 @@ content: |
>>>>      ABI_FLAGS=${ABI_FLAGS}
>>>>      RTEMS_ARCH=${ARCH}
>>>>      RTEMS_BSP=${BSP_NAME}
>>>> +  RTEMS_BSP_BASE=${BSP_BASE}
>>>> +  RTEMS_BSP_FAMILY=${BSP_FAMILY}
>>> These expose a little bit of the internal working of the build system.
>>> I think it's fine, since these two fields should not change over time.
>>> But, it commits us to maintain this mapping and these variables.
>> We had the RTEMS_BSP also in the old build system, but it was actually
>> what is now the RTEMS_BSP_BASE in this patch. With the user-defined BSP
>> names we have for:
>>
>> [arch/user_bsp_name]
>> INHERIT = system_bsp_name
>>
>> This results in:
>>
>> RTEMS_BSP = user_bsp_name
>> RTEMS_BSP_BASE = system_bsp_name
>>
>> Maybe we should change this to:
>>
>> RTEMS_BSP = system_bsp_name
>> RTEMS_BSP_NAME = user_bsp_name
>>
> This would make more sense. I don't know what it might break to make
> this change now though, as external build tools may rely on the
> current definition of RTEMS_BSP?

Yes, this is a bit tricky since the BSP name is also encoded in the *.pc 
file name: ${arch}-rtems6-{user_bsp_name}.pc. This is an argument for 
keeping RTEMS_BSP = user_bsp_name.

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