[pulseaudio-discuss] Building PA on GCC 4.7

[Colin Guthrie]

'Twas brillig, and Arun Raghavan at 25/02/12 04:00 did gyre and gimble:
> On Fri, 2012-02-24 at 21:30 +0000, Colin Guthrie wrote:
>> 'Twas brillig, and Lennart Poettering at 20/02/12 19:08 did gyre and gimble:
>>> Heya,
>>>
>>> It turns out I currently can't build PA on F17, due to some GCC 4.7 ASM
>>> incompatibility in the SBC code:
>>>
>>>   CC     libbluetooth_sbc_la-sbc_primitives_mmx.lo
>>> modules/bluetooth/sbc/sbc_primitives_mmx.c: In function 'sbc_calc_scalefactors_mmx':
>>> modules/bluetooth/sbc/sbc_primitives_mmx.c:294:4: warning: asm operand 2
>>> probably doesn't match constraints [enabled by default]
>>> modules/bluetooth/sbc/sbc_primitives_mmx.c:294:4: error: impossible
>>> constraint in 'asm'
>>> make[3]: *** [libbluetooth_sbc_la-sbc_primitives_mmx.lo] Error 1
>>>
>>> git blame says Siarhei Siamashka wrote this bit. Siarhei, any idea what
>>> is going on here?
>>
>> Looks like:
>>
>> http://git.kernel.org/?p=bluetooth/bluez.git;a=commit;h=03bb9d3426af326642cb4ff280a793cd69a0d844
>>
>> fixes the issue.
>>
>> "make update-sbc" run and the result pushed to git.
> 
> That error does seem to be different from the one posted here, though.

Yup, I didn't read properly the phrase "pushed a fix for bluez"... Peter
meant he'd pushed a fix to *fedora* for bluez *package*... /me just
assumed the most recent commit in bluez upstream git mentioning sbc was
the one to which he was referring. Silly me.

Real fix is here:
http://pkgs.fedoraproject.org/gitweb/?p=bluez.git;a=blob;f=sbc_mmx.patch;h=2f00bb6856fb8e313f332d8ed90ca65a3a58de3a;hb=HEAD

As soon as it goes upstream in bluez we can do make update-sbc again and
push it :)

Col


-- 

Colin Guthrie
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http://colin.guthr.ie/

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