Make sstate cache local tool independent

Make sstate cache local tool independent

[Mike Looijmans]

I'm forced to using external tools in some recipes (that build FPGA bitstreams 
using huge proprietary packages). Building these takes between half an hour 
and several hours on big fast machines, so I definitely want to use 
sstate-cache for these.

The trouble I'm running into is that I have a variable like XILINX_TOOL_PATH 
which is in local.conf so people can tell where the tools are.

The compile part of the recipe runs something like 
${XILINX_TOOL_PATH}/bin/something

This makes the "compile" step dependent on that variable. When a machine 
installs the tools somewhere else, it will have a different value for that 
tool, and because OE thinks that matters, it will insist on building its very 
own version of that package instead of just fetching it from the sstate-cache 
on the buildserver.

How do I explain to OE that the value of this variable does not matter for the 
sstate-cache?

I tried: do_compile[vardepsexclude] = "XILINX_TOOL_PATH"

that didn't appear to help.


-- 
Mike Looijmans - TOPIC Automation


Met vriendelijke groet / kind regards,

Mike Looijmans

TOPIC Embedded Systems
Eindhovenseweg 32-C, NL-5683 KH Best
Postbus 440, NL-5680 AK Best
Telefoon: (+31) – (0)499 - 33.69.79
Telefax: (+31) - (0)499 - 33.69.70
E-mail: mike.looijmans@topic.nl
Website: www.topic.nl

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Re: Make sstate cache local tool independent

[Richard Purdie]

On Fri, 2014-01-31 at 09:08 +0100, Mike Looijmans wrote:
> I'm forced to using external tools in some recipes (that build FPGA bitstreams 
> using huge proprietary packages). Building these takes between half an hour 
> and several hours on big fast machines, so I definitely want to use 
> sstate-cache for these.
> 
> The trouble I'm running into is that I have a variable like XILINX_TOOL_PATH 
> which is in local.conf so people can tell where the tools are.
> 
> The compile part of the recipe runs something like 
> ${XILINX_TOOL_PATH}/bin/something
> 
> This makes the "compile" step dependent on that variable. When a machine 
> installs the tools somewhere else, it will have a different value for that 
> tool, and because OE thinks that matters, it will insist on building its very 
> own version of that package instead of just fetching it from the sstate-cache 
> on the buildserver.
> 
> How do I explain to OE that the value of this variable does not matter for the 
> sstate-cache?
> 
> I tried: do_compile[vardepsexclude] = "XILINX_TOOL_PATH"
> 
> that didn't appear to help.

Is the name of the compile step do_compile, or are there intermediate
functions?

vardepsexclude should work but you need to make sure you apply it to the
right variable/function.

Cheers,

Richard