Re: [PATCH 00/29] Add gobject introspection support to oe-core

[Mark Hatle <mark.hatle@windriver.com>]

On 11/10/15 9:36 AM, Alexander Kanavin wrote:
> On 11/10/2015 04:31 PM, Mark Hatle wrote:
>> Is there a way that the qemu calls can be replaced by calls to an actual running
>> board (via SSH perhaps) to get the necessary information?  While inconvenient
>> this might be a valid workaround.
> 
> Theoretically, yes. Copy the sysroot and the build tree to the board (to 
> some safe location, obviously), then execute the arch-dependent bits of 
> the process remotely, then copy the output files back. Slow, but doable. 
> The executable wrapper mechanism for that is already provided by the 
> patchset.
> 
> I would however first seriously look into reengineering g-o so that it's 
> architecture-independent, and doesn't require such awful contortions. 

I don't disagree with you there...

> Primarily, two things:
> 1) It should be easy to build transient introspection binaries for the 
> native architecture, instead of building them for the target together 
> with the rest of the package. Those binaries produce textual output 
> (essentially a list of classes/signals/properties) which is 
> architecture-independent.
> 2) The binary introspection database in .typelib files should not be a 
> raw dump of a C structure, and should be actually the same on all 
> architectures.
> 
>> Also is there any facility to caching the gobject responses (other then standard
>> sstate-cache) so for machine that do not have QEMU support we can used a cached
>> set of responses?  (I'm not sure if these responses could be considered to be a
>> global cache, or if they are distribution specific in configuration.  Likely the
>> later.)
> 
> This requires custom bitbake support I'm afraid, a specialist needs to 
> answer this.
> 

Let me rephrase.  Instead of calling out to qemu (or a real target) for a
gobject and result.  Can the result be cached (like we do with the config-site
info?)  This would allow me to run say a MIPS64 n64 gobject build, cache the
results and use it on my octeon3 build (which can't run in QEMU.)

--Mark

> 
> Alex
>