[yocto] yocto build cross toolchain issue

Thu Jul 7 03:50:37 PDT 2016

Hi Khem Raj,

Sorry for the confusion. There is no such dependency that we can’t change the link order. What I meant was in reply, “Since with older gcc version library sequence was working, I didn’t doubt on that”. But resequencing the library is working for me.

Regards,
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Chandra Mishra
ENGINEER.DIAGNOSTIC ENGINEERING

chanmish at cisco.com
Phone: +91 80 4429 1490

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From: Khem Raj [mailto:raj.khem at gmail.com]
Sent: 05 July 2016 20:54
To: Chandra Mishra (chanmish) <chanmish at cisco.com>
Cc: Burton, Ross <ross.burton at intel.com>; yocto at yoctoproject.org
Subject: Re: [yocto] yocto build cross toolchain issue

On Tue, Jul 5, 2016 at 3:06 AM, Chandra Mishra (chanmish) <chanmish at cisco.com<mailto:chanmish at cisco.com>> wrote:
Thanks Ross for your suggestion. It worked for me. But in the past it worked for me with old sequence but different gcc cross toolchain, so not thinking of changing the order.

why wont you change the order. Whats depending on it ?

Regards,
[http://www.cisco.com/c/dam/assets/email-signature-tool/logo_01.png?ct=1443872971831]

Chandra Mishra
ENGINEER.DIAGNOSTIC ENGINEERING

chanmish at cisco.com<mailto:chanmish at cisco.com>
Phone: +91 80 4429 1490<tel:%2B91%2080%204429%201490>

Cisco Systems, Inc.
Cessna Business Park, Kadubeesanahalli Varthur Hobli, Sarjapur Marathalli ORR
BANGALORE
560 087
India
cisco.com<http://www.cisco.com/>

[http://www.cisco.com/assets/swa/img/thinkbeforeyouprint.gif]Think before you print.

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From: Burton, Ross [mailto:ross.burton at intel.com<mailto:ross.burton at intel.com>]
Sent: 05 July 2016 14:59
To: Chandra Mishra (chanmish) <chanmish at cisco.com<mailto:chanmish at cisco.com>>
Cc: yocto at yoctoproject.org<mailto:yocto at yoctoproject.org>
Subject: Re: [yocto] yocto build cross toolchain issue

On 5 July 2016 at 10:20, Chandra Mishra (chanmish) <chanmish at cisco.com<mailto:chanmish at cisco.com>> wrote:

  -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed -static -lnsl -lpthread -lm -lrt

<TOOLCHAIN_PATH>/sysroots/corei7-64-poky-linux/usr/lib/../lib/librt.a(shm_open.o): In function `shm_open':

<SDK BUILD PATH>/build/tmp/work/corei7-64-poky-linux/glibc/2.22-r0/git/rt/../sysdeps/posix/shm_open.c:35: undefined reference to `__shm_directory'

At a guess this is due to --as-needed dropping symbols as unused which then are used, because --as-needed needs a sorted library list.  Either remove --as-needed, or try reordering the libraries so that dependencies are in order.

https://wiki.gentoo.org/wiki/Project:Quality_Assurance/As-needed#Importance_of_linking_order has more context.

In this case I'd start with moving -lpthread to the end of the link line.

Ross

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