[SCM] supercollider/master: supernova compile fix on x86

[Felipe Sateler]

On Wed, Dec 26, 2012 at 7:10 AM, Dan S <danstowell+debmm at gmail.com> wrote:
> 2012/12/25 Felipe Sateler <fsateler at debian.org>:
>> On Fri, Dec 21, 2012 at 3:03 PM,
>> <danstowell-guest at users.alioth.debian.org> wrote:
>>> The following commit has been merged in the master branch:
>>> commit b0855e79951393de8d0e044af3abd679b463a20f
>>> Author: Dan Stowell <danstowell at users.sourceforge.net>
>>> Date:   Fri Dec 21 17:42:31 2012 +0000
>>>
>>>     supernova compile fix on x86
>>>
>>> diff --git a/debian/patches/series b/debian/patches/series
>>> index 2f7e98b..2ba49f0 100644
>>> --- a/debian/patches/series
>>> +++ b/debian/patches/series
>>> @@ -1,2 +1,3 @@
>>>  no-inline-ppc-ftbfs.patch
>>>  perf-counter-include.patch
>>> +supernova-i686-march-flag.patch
>>> diff --git a/debian/patches/supernova-i686-march-flag.patch b/debian/patches/supernova-i686-march-flag.patch
>>> new file mode 100644
>>> index 0000000..a692303
>>> --- /dev/null
>>> +++ b/debian/patches/supernova-i686-march-flag.patch
>>> @@ -0,0 +1,15 @@
>>> +Index: supercollider/server/supernova/CMakeLists.txt
>>> +===================================================================
>>> +--- supercollider.orig/server/supernova/CMakeLists.txt 2012-12-21 03:44:14.806118662 +0000
>>> ++++ supercollider/server/supernova/CMakeLists.txt      2012-12-21 03:44:37.562118316 +0000
>>> +@@ -12,6 +12,10 @@
>>> +     endif()
>>> + endif()
>>> +
>>> ++if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "i686")
>>> ++  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=i686")
>>> ++endif()
>>
>> This is wrong. Debian is supposed to work from i486 onwards. Why is this needed?
>
> I discussed this with upstream and with debian-mentors. I'm afraid it
> is needed because supernova uses some pentium+ cpu instructions (and
> they can be emulated but not in a realtime system). Please note that
> "supernova" is the SIMDified parallel-processing drop-in replacement
> for "scsynth", and so i486 users would be advised to use the scsynth
> package, losing no functionality.

Ah, so we need to improve the descriptions of sc-server and
sc-supernova. This was not at all clear to me. Could you elaborate a
bit on the relationship between sc-server and sc-supernova? Is
supernova picked up automatically when installed? Or is some
configuration necessary?

--

Saludos,
Felipe Sateler