[oe] [OE-core] [yocto] [RFT] upcoming glibc 2.21 and gcc 4.9 upgrade

[Khem Raj]

Hi Richard/All

I have refreshed the branch to include the patch which moves the src
uri to use the newly released glibc 2.21 branch
and please run it via autobuilder ( top 5 commits )

Thanks
-Khem



On Tue, Feb 3, 2015 at 10:43 PM, Dan McGregor <danismostlikely at gmail.com> wrote:
> On 2 February 2015 at 23:03, Khem Raj <raj.khem at gmail.com> wrote:
>> On Mon, Feb 2, 2015 at 1:45 PM, Burton, Ross <ross.burton at intel.com> wrote:
>>>
>>> On 2 February 2015 at 18:33, Khem Raj <raj.khem at gmail.com> wrote:
>>>>
>>>> Yeah, I am on archlinux (the other end of spectrum). Nevertheless, I have
>>>> updated the contrib tree which fixes cross-localedef-native compile time
>>>> issue. So you should be good
>>>> to go now.
>>>
>>>
>>> Bad news, glibc is now failing:
>>>
>>> | x86_64-poky-linux-gcc  -m64 -march=corei7 -mtune=corei7 -mfpmath=sse
>>> -msse4.2
>>> --sysroot=/data/poky-master/tmp/sysroots/intel-corei7-64-tcbootstrap
>>> dl-open.c -c -std=gnu99 -fgnu89-inline  -O2 -Wall -Werror -Winline
>>> -Wno-error=undef -Wundef -Wwrite-strings -feliminate-unused-debug-types
>>> -fmerge-all-constants -frounding-math -g -pipe -Wstrict-prototypes   -fPIC
>>> -mno-sse -mno-mmx        -I../include
>>> -I/data/poky-master/tmp/work/corei7-64-poky-linux/glibc/2.21-r0/build-x86_64-poky-linux/elf
>>> -I/data/poky-master/tmp/work/corei7-64-poky-linux/glibc/2.21-r0/build-x86_64-poky-linux
>>> -I../sysdeps/unix/sysv/linux/x86_64/64  -I../sysdeps/unix/sysv/linux/x86_64
>>> -I../sysdeps/unix/sysv/linux/x86  -I../sysdeps/unix/sysv/linux/wordsize-64
>>> -I../sysdeps/x86_64/nptl  -I../sysdeps/unix/sysv/linux/include
>>> -I../sysdeps/unix/sysv/linux  -I../sysdeps/nptl  -I../sysdeps/pthread
>>> -I../sysdeps/gnu  -I../sysdeps/unix/inet  -I../sysdeps/unix/sysv
>>> -I../sysdeps/unix/x86_64  -I../sysdeps/unix  -I../sysdeps/posix
>>> -I../sysdeps/x86_64/64  -I../sysdeps/x86_64/fpu/multiarch
>>> -I../sysdeps/x86_64/fpu  -I../sysdeps/x86/fpu/include -I../sysdeps/x86/fpu
>>> -I../sysdeps/x86_64/multiarch  -I../sysdeps/x86_64  -I../sysdeps/x86
>>> -I../sysdeps/ieee754/ldbl-96  -I../sysdeps/ieee754/dbl-64/wordsize-64
>>> -I../sysdeps/ieee754/dbl-64  -I../sysdeps/ieee754/flt-32
>>> -I../sysdeps/wordsize-64  -I../sysdeps/ieee754  -I../sysdeps/generic  -I..
>>> -I../libio -I. -nostdinc -isystem
>>> /data/poky-master/tmp/sysroots/x86_64-linux/usr/lib/x86_64-poky-linux.gcc-cross-initial-x86_64/gcc/x86_64-poky-linux/4.9.2/include
>>> -isystem
>>> /data/poky-master/tmp/sysroots/x86_64-linux/usr/lib/x86_64-poky-linux.gcc-cross-initial-x86_64/gcc/x86_64-poky-linux/4.9.2/include-fixed
>>> -isystem /data/poky-master/tmp/sysroots/intel-corei7-64/usr/include
>>> -D_LIBC_REENTRANT -include
>>> /data/poky-master/tmp/work/corei7-64-poky-linux/glibc/2.21-r0/build-x86_64-poky-linux/libc-modules.h
>>> -DMODULE_NAME=rtld -include ../include/libc-symbols.h  -DPIC -DSHARED     -o
>>> /data/poky-master/tmp/work/corei7-64-poky-linux/glibc/2.21-r0/build-x86_64-poky-linux/elf/dl-open.os
>>> -MD -MP -MF
>>> /data/poky-master/tmp/work/corei7-64-poky-linux/glibc/2.21-r0/build-x86_64-poky-linux/elf/dl-open.os.dt
>>> -MT
>>> /data/poky-master/tmp/work/corei7-64-poky-linux/glibc/2.21-r0/build-x86_64-poky-linux/elf/dl-open.os
>>> | dl-caller.c:1:0: error: SSE instruction set disabled, using 387
>>> arithmetics [-Werror]
>>> |  /* Check whether caller comes from the right place.
>>> |  ^
>>> | dl-open.c:1:0: error: SSE instruction set disabled, using 387 arithmetics
>>> [-Werror]
>>> |  /* Load a shared object at runtime, relocate it, and run its initializer.
>>> |  ^
>>> | cc1: all warnings being treated as errors
>>> | cc1: all warnings being treated as errors
>>
>> The real problem is we are injecting -mfpmath=sse -msse4.2 via CCARGS
>> and for this particular file glibc says  -mno-sse -mno-mmx
>> so it defaults to x87 80bit arithmetics. May be we should get a bit
>> milder with optimizations for this case when compiling glibc. Since
>> glibc has its own notion about floating point.
>>
>> I think this issue was there even with older version of glibc for i7
>> but it was flagged as a warning, glibc 2.21 now uses -Werror by
>> default. Can you confirm that via inspecting 2.20 glibc build logs for
>> this machine ?
>>
>> I have pushed another patch to disable sse for replacing fpu. Please
>> try it out and let me know if it fixed it.
>>
>
> The new branch is working well for me, for wandboard-quad, beaglebone,
> and cubieboard2.
>
>>>
>>> Ross
>> --
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