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From: Saul Wold <sgw@linux.intel.com>
To: Khem Raj <raj.khem@gmail.com>
Cc: openembedded-core@lists.openembedded.org
Subject: Re: [PATCH] poky-tiny: Enable x86-64 to build eglibc correctly
Date: Fri, 31 Aug 2012 09:31:38 -0700	[thread overview]
Message-ID: <5040E6EA.4010806@linux.intel.com> (raw)
In-Reply-To: <CAMKF1sr=pHa21ihb5y6m9tkLYV4zG2__hWkBBZML=S9eRZhZfw@mail.gmail.com>

On 08/30/2012 02:49 PM, Khem Raj wrote:
> On Thu, Aug 30, 2012 at 12:48 PM, Saul Wold <sgw@linux.intel.com> wrote:
>> The libc-libm-big option allows eglibc to correctly configure
>> itself to include the correct math functions for 64bit operations
>>
>> [YOCTO #2943]
>>
>> Signed-off-by: Saul Wold <sgw@linux.intel.com>
>> ---
>>   meta-yocto/conf/distro/poky-tiny.conf |    1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/meta-yocto/conf/distro/poky-tiny.conf b/meta-yocto/conf/distro/poky-tiny.conf
>> index 8ae1d85..bfb4432 100644
>> --- a/meta-yocto/conf/distro/poky-tiny.conf
>> +++ b/meta-yocto/conf/distro/poky-tiny.conf
>> @@ -63,6 +63,7 @@ ASSUME_PROVIDED += "pkgconfig$"
>>   # Reconfigure eglibc for a smaller installation
>>   # Comment out any of the lines below to disable them in the build
>>   DISTRO_FEATURES_LIBC_TINY = "libc-libm libc-crypt"
>> +DISTRO_FEATURES_LIBC_TINY_append_x86-64 = " libc-libm-big"
>>
>>   # Required for "who"
>>   DISTRO_FEATURES_LIBC_MINIMAL = "libc-utmp libc-getlogin"
>
>
> there is a bug in eglibc if it cant build without libc-libm-big
> it should have not caused any undefined symbol failures because
> all it should have done is not use double precision so your computations
> will be less accurate.
>

Khem,

You are correct the problem is that if the libm-big option is not 
specificed it grabs the dbl-wrap files for some sysdep function, but 
still uses the dbl-64 functions for others.

Should I file an eglibc bug?

Sau!

>> --
>> 1.7.9.5
>>
>>
>> _______________________________________________
>> Openembedded-core mailing list
>> Openembedded-core@lists.openembedded.org
>> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
>
>



  reply	other threads:[~2012-08-31 16:43 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-08-30 19:48 [PATCH] poky-tiny: Enable x86-64 to build eglibc correctly Saul Wold
2012-08-30 20:04 ` Chris Larson
2012-08-30 20:13   ` Phil Blundell
2012-08-30 21:40     ` Khem Raj
2012-08-30 21:49 ` Khem Raj
2012-08-31 16:31   ` Saul Wold [this message]
2012-08-31 16:47     ` Khem Raj
2012-09-06 17:47   ` Darren Hart

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