Re: [PATCH] Makefile: introduce NO_PTHREADS

[dhruva <dhruvakm@gmail.com>]

Hello,
 I am able to compile and use git by defining THREADED_DELTA_SEARCH
and copying setjmp.h from mingw (www.mingw.org) to msys include folder
with small changes to it. If it does add value, we should try to
enable this by default.

-dhruva

On Mon, Dec 1, 2008 at 1:59 PM, Johannes Sixt <j.sixt@viscovery.net> wrote:
> Johannes Sixt schrieb:
>> Mike Ralphson schrieb:
>>> 2008/11/17 Johannes Sixt <j.sixt@viscovery.net>:
>>>> Mike Ralphson schrieb:
>>>>> 2008/11/15 Linus Torvalds <torvalds@linux-foundation.org>:
>>>>>> On Sat, 15 Nov 2008, Junio C Hamano wrote:
>>>>>>> This introduces make variable NO_PTHREADS for platforms that lack the
>>>>>>> support for pthreads library or people who do not want to use it for
>>>>>>> whatever reason.  When defined, it makes the multi-threaded index
>>>>>>> preloading into a no-op, and also disables threaded delta searching by
>>>>>>> pack-objects.
>>>>>> Ack. Makes sense.
>>>>> I'd be minded to make this the default on AIX to keep the prerequisite
>>>>> list as small as possible, then people can opt-in for the performance
>>>>> benefits if required.
>>>> Is pthreads not a standard shipment on AIX? I would set NO_PTHREADS only
>>>> if we know in advance that there are many installations without pthreads.
>>>> (And I don't know what the situation is.)
>>> I should have dug a bit further, it seems to be present on my 5.3
>>> machines but I still need to determine whether it got installed by
>>> default. Either way it must need some other link flags...
>>
>> I tried compiling with THREADED_DELTA_SEARCH=Yes, and it fails with
>>
>>     CC builtin-pack-objects.o
>> In file included from /usr/include/sys/pri.h:29,
>>                  from /usr/include/sys/sched.h:38,
>>                  from /usr/include/sched.h:52,
>>                  from /usr/include/pthread.h:43,
>>                  from builtin-pack-objects.c:22:
>> /usr/include/sys/proc.h:203: parse error before "crid_t"
>> /usr/include/sys/proc.h:212: parse error before "p_class"
>> /usr/include/sys/proc.h:355: parse error before '}' token
>>
>> :-( Maybe NO_PTHREADS is indeed the safer choice? I'm not going to dig
>> into this today, though. (I'm on AIX 4.3.something.)
>>
>>>> BTW, this needs to be squashed in, because we don't have pthreads on Windows:
>>>>
>>>> diff --git a/Makefile b/Makefile
>>>> index ffc9531..3a30b8c 100644
>>>> --- a/Makefile
>>>> +++ b/Makefile
>>>> @@ -769,6 +769,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
>>>>        NO_STRCASESTR = YesPlease
>>>>        NO_STRLCPY = YesPlease
>>>>        NO_MEMMEM = YesPlease
>>>> +       NO_PTHREADS = YesPlease
>>>>        NEEDS_LIBICONV = YesPlease
>>>>        OLD_ICONV = YesPlease
>>>>        NO_C99_FORMAT = YesPlease
>>>>
>>> Ta. Ok to add your S-o-B on a squashed patch?
>>
>> Sure. Use this address please:
>>
>> Signed-off-by: Johannes Sixt <j6t@kdbg.org>
>
> Mike,
>
> you said you would resend the patch, but I think you forgot about it.
> Would you do that now, please?
>
> -- Hannes
>
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Contents reflect my personal views only!