[U-Boot] simple buildman usage

[Stephen Warren]

On 07/14/2015 05:33 PM, Tom Rini wrote:
> On Tue, Jul 14, 2015 at 04:39:01PM -0600, Stephen Warren wrote:
>> On 07/14/2015 04:09 PM, Tom Rini wrote:
>>> On Tue, Jul 14, 2015 at 02:11:25PM -0600, Stephen Warren wrote:
>>>> On 07/14/2015 11:56 AM, Tom Rini wrote:
>>>>> Hey all,
>>>>>
>>>>> I've pushed v2015.07 out to the repository and tarballs should exist
>>>>> soon.
>>>>>
>>>>> This sounds a bit like a broken record, but it's true.  The Kconfig
>>>>> migration and DM work continue moving along.
>>>>>
>>>>> Looking over the announcement for v2015.04, I see I said we'd deprecate
>>>>> MAKEALL.  So I've applied http://patchwork.ozlabs.org/patch/383960/
>>>>> right after the tag.  If buildman isn't working for you and your use
>>>>> case, we really need to talk.
>>>>
>>>> The nice thing about MAKEALL was that I could simply grab a source
>>>> tree, and run the following to build in-tree:
>>>>
>>>> CROSS_COMPILE=something ./MAKEALL foo
>>>>
>>>> However, with buildman, some complex config file needed to be set up
>>>> to configure the toolchain (and I could never parse the docs to work
>>>> out how to create it in a new checkout), plus it made copies of the
>>>> source tree which takes ages for me.
>>>>
>>>> Is there an equivalently simple way to invoke buildman that doesn't
>>>> require configuration and copying?
>>>
>>> For no copying, --in-tree does what you want I think.
>>
>> OK. Making that the default would be useful, or providing a buildman
>> wrapper script in the root directory that always passes this option.
>>
>>> For not
>>> configuring a toolchain, there's two ways to go about this.  One would
>>> be to do something like:
>>>
>>> diff --git a/tools/buildman/toolchain.py b/tools/buildman/toolchain.py
>>> index e33e105..bba60d5 100644
>>> --- a/tools/buildman/toolchain.py
>>> +++ b/tools/buildman/toolchain.py
>>> @@ -159,7 +159,7 @@ class Toolchains:
>>>                    " to your buildman config file %s. See README for details" %
>>>                    bsettings.config_fname)
>>>
>>> -        paths = []
>>> +        paths = ['/usr', '/usr/local']
>>>           for name, value in toolchains:
>>>               if '*' in value:
>>>                   paths += glob.glob(value)
>>>
>>> And then any toolchains in /usr and /usr/local would be picked up and
>>> used.  Another option would be to add --tool-chain-path DIR and throw
>>> that into the above function.  Thoughts?
>>
>> Does that find cross-compilers? IIRC I had to add the full compiler
>> binary name into the config file, not just a /usr search directory,
>> so I don't think the above patch is enough to make it work. What if
>> I want to use a specific cross-compiler and I have 4 different ARM
>> compilers installed in /usr? How would it know which architecture's
>> cross-compiler to use?
>
> Well, how much are you expecting to Just Work without making a real
> config?

The same way MAKEALL did; by honoring CROSS_COMPILE:-)