[OE-core] [PATCH][resend] python-native: distutils: don't use libdir, remove dead code path

[Andreas Oberritter]

On 12.03.2012 18:58, Saul Wold wrote:
> On 03/07/2012 01:07 PM, Andreas Oberritter wrote:
>> * Coming from OE-classic it was surprising that python-native now
>>    requires 'libdir' to be exported. Otherwise autoconf would fail
>>    to detect python libraries. This happend using a customized
>>    environment setup script to use OE's compiler and libs without
>>    bitbake.
>> * Use sys.lib instead of libdir's suffix.
>> * While at it, simplify redundant if/and-statments.
>>
>> Signed-off-by: Andreas Oberritter<obi at opendreambox.org>
>> ---
>> * This patch hasn't been commented since its first submission
>>    on Feb 21st.
>> * Original patch URL: http://patches.openembedded.org/patch/21481/
>>
>>   ...2-distutils-prefix-is-inside-staging-area.patch |   15
>> +++++----------
>>   1 files changed, 5 insertions(+), 10 deletions(-)
>>
> This will need a PR bump so the modified patch will be noticed, I know
> this patch was put in a while ago.

Right. I'm waiting before resubmitting it. See below.

> I am not so sure about the changes though, I have been meaning to dig
> into this, the orignial code looks strange in that it includes
> plat_specific in the else clause!  You are also dropping the EXEC_PREFIX

I'm dropping EXEC_PREFIX, because it's dead code.

The code from the original patch can be rewritten as:

if plat_specific:
	if plat_specific:
		prefix = os.environ['STAGING_LIBDIR'].rstrip(lib_basename)
else:
	if plat_specific:
		prefix = EXEC_PREFIX
	else:
		prefix = PREFIX

Does this make it clear?
 
> How have you tested this change?

I built from scratch and also runtime tested it, but without multilib. 

As I'm currently investing a different problem in python, digging into
python internals, I doubt that sys.lib really contains the correct
value for multilib, unless multilib builds have multiple python-natives.

I think it would be better to just drop the last element of STAGING_LIBDIR,
i.e.:

if plat_specific:
	prefix = '/'.join(os.environ['STAGING_LIBDIR'].split('/')[:-1])
else:
	prefix = PREFIX

Do you think this would be OK?

Regards,
Andreas