[yocto] yocto build cross toolchain issue

[Chandra Mishra (chanmish)]

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.

Regards,
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From: Burton, Ross [mailto:ross.burton at intel.com]
Sent: 05 July 2016 14:59
To: Chandra Mishra (chanmish) <chanmish at cisco.com>
Cc: 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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