Compressed patch to move make/custom/* to make/*

[Sebastian Huber]

On 09/02/18 00:47, Chris Johns wrote:
>>      No user should be forced to touch its Makefiles only because we move some
>>      files in the RTEMS source tree from A to B. So, I think the install location
>>      should remain as is.
>>
>>
>> I agree but I think you missed my point. The use in testsuites can be fixed to point
>> to the source tree.  But if I change the includes in the "custom" files, I have
>> concerns
>> that it may not be possible to make it work in both when building and installed.
>>
> Exporting anything internal to users is always going to present a risk, we have
> known and acknowledged this for years. It has been part of the reason we have
> avoided making changes in the build system however my attitude is changing or
> has changed, ie removing preinstall.
>
> Long term I cannot see how we can sustain this interface and that means we need
> to determine when it goes? I am more than happy to be proved wrong. It is only
> fair to those who use these installed files they get suitable warning and we
> need to figure out what we provide to replace it.
>
> Building new applications and products based on this type of application build
> framework with RTEMS 5 should be discouraged. We are looking to increase the
> release frequency and this will only shorten the life span for these files.
>

I think it will not cost much to simply leave this stuff as is. It 
should be easy to support with any RTEMS internal build system. The only 
thing we really need are the machine flags for the BSP. We need a better 
place to specify them. The blocking points for the next step of build 
system clean up are from my point of view (highest priority first):

1. The host tools, they should move to rtems-tools or even go away if no 
longer used. Getting rid of the native compiler for BSP builds will 
simplify things.

2. The libcpu, the files should move to 
bsps/@RTEMS_CPU@/@RTEMS_BSP_FAMILY@/* or bsps/@RTEMS_CPU@/shared/*.

3. Move the machine flags out of the *.cfg files. Make them usable by 
arbitrary build systems.

4. Make the BSP options independent of Autoconf, so that it can be used 
from Autoconf and other build systems.

What is the benefit of moving files from

c/src/lib/libbsp/@RTEMS_CPU@/@RTEMS_BSP_FAMILY@/make/custom

to

c/src/lib/libbsp/@RTEMS_CPU@/@RTEMS_BSP_FAMILY@/make

?

-- 
Sebastian Huber, embedded brains GmbH

Address : Dornierstr. 4, D-82178 Puchheim, Germany
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E-Mail  : sebastian.huber at embedded-brains.de
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