[U-Boot] [[RFC Patch] 2/2] tools: buildman: Add compiler wrapper

[Simon Glass]

Hi York,

On 29 September 2016 at 15:12, York Sun <york.sun at nxp.com> wrote:
>
> Now we can use compiler wrapper such as ccache or distcc for buildman.
>
> Signed-off-by: York Sun <york.sun at nxp.com>
> CC: Simon Glass <sjg at chromium.org>
> ---
> This is not perfect and may need some improvement. Something I didn't figure
> out is how to drop the name under [toolchain-wrapper]. I intended to have this
> format but bsettings.GetItems doesn't like it.
>
> [toolchain-wrapper]
> ccache
>
> It doesn't deal with more than one line for this setting. For now, the last
> setting is taken.
>
>  tools/buildman/README       |  9 +++++++++
>  tools/buildman/toolchain.py | 17 +++++++++++++++--
>  2 files changed, 24 insertions(+), 2 deletions(-)

Looks good, a few nits below.

Acked-by: Simon Glass <sjg at chromium.org>

>
> diff --git a/tools/buildman/README b/tools/buildman/README
> index 8c5f861..514bebc 100644
> --- a/tools/buildman/README
> +++ b/tools/buildman/README
> @@ -211,6 +211,15 @@ arm: arm-none-eabi-
>
>  and buildman will find arm-none-eabi-gcc in /usr/bin if you have it installed.
>
> +[toolchain-wrapper]
> +wrapper: ccache

I think it is good to have this in a separate section, as you have
done. If we put it in the '[toolchain]' section, the name 'wrapper'
would be special, and mean something, whereas the other names would
not.

> +
> +This tells buildman to use a compiler wrapper in front of CROSS_COMPILE. In
> +this example, ccache. It doesn't affect the toolchain scan. The wrapper is
> +added when CROSS_COMPILE environtal variable is set. The name in this
> +section is ignored. If more than one line is provided, only the last one
> +is taken.
> +
>  3. Make sure you have the require Python pre-requisites
>
>  Buildman uses multiprocessing, Queue, shutil, StringIO, ConfigParser and
> diff --git a/tools/buildman/toolchain.py b/tools/buildman/toolchain.py
> index 41e4e4c..01cdb03 100644
> --- a/tools/buildman/toolchain.py
> +++ b/tools/buildman/toolchain.py
> @@ -127,6 +127,15 @@ class Toolchain:
>                  return PRIORITY_CALC + prio
>          return PRIORITY_CALC + prio
>
> +    def GetWrapper(self, show_warning=True):
> +        """Get toolchain wrapper from the setting file.
> +        """
> +       value = ''
> +       for name, value in bsettings.GetItems('toolchain-wrapper'):
> +            if not value:
> +                print "Warning: Wrapper not found"
> +        return value

Can you make it add the ' ' here?

> +
>      def MakeEnvironment(self, full_path):
>          """Returns an environment for using the toolchain.
>
> @@ -138,10 +147,14 @@ class Toolchain:
>                  PATH
>          """
>          env = dict(os.environ)
> +        wrapper = self.GetWrapper()
> +        if wrapper:
> +            wrapper = wrapper + ' '

Instead of here

> +
>          if full_path:
> -            env['CROSS_COMPILE'] = os.path.join(self.path, self.cross)
> +            env['CROSS_COMPILE'] = wrapper + os.path.join(self.path, self.cross)
>          else:
> -            env['CROSS_COMPILE'] = self.cross
> +            env['CROSS_COMPILE'] = wrapper + self.cross
>              env['PATH'] = self.path + ':' + env['PATH']
>
>          return env
> --
> 2.7.4
>
Regards,
Simon