[yocto] libm implementation issue

[peterengcomau001 at adam.com.au]

 Thanks,I have continued to struggle on and had just decided to file
a bug myself. Thanks for verifying and filing the bug
already.RegardsLachlan

----- Original Message -----
From: benjamin.esquivel at linux.intel.com
To:
Cc:
Sent:Tue, 30 Dec 2014 13:48:57 -0600
Subject:Re: [yocto] libm implementation issue

 On Tue, 2014-12-30 at 20:09 +1030, peterengcomau001 at adam.com.au
wrote:
 > 
 > I have some software that uses specific mathematical functions.
When I
 > attempt to compile them with the Yocto cross-compile tools, the
 > functions are not recognised. E.g. 'pow' in 
 > According to website
https://wiki.yoctoproject.org/wiki/Minimal_Image,
 > not all eglibc features are installed as standard, and that I
should
 > alter my local.conf file. I have added the following:
 > 
 > DISTRO_FEATURES_LIBC += " libc-libm "
 > DISTRO_FEATURES_append = " ${DISTRO_FEATURES_LIBC} "
 > 

 it seems like the instructions at:


https://wiki.yoctoproject.org/wiki/Minimal_Image#eglibc_component_configuration_system

 are not giving the expected results. I tried it with dizzy and daisy
and
 I obtained the same ld error as you.

 I filed a bug here for such:

 https://bugzilla.yoctoproject.org/show_bug.cgi?id=7108

 I guess we can track it from there.

 > When I bitbake the image I get the following error: (this is just
the
 > end of the error log - there are many undefined references)
 > 
 > |
/home/lachlan/poky/build-atmel/tmp/work/cortexa5t2hf-vfp-poky-linux-gnueabi/eglibc/2.19-r0/eglibc-2.19/libc/pwd/../nss/getXXbyYY_r.c:213:
undefined reference to `__nss_database_custom'
 > |
/home/lachlan/poky/build-atmel/tmp/work/cortexa5t2hf-vfp-poky-linux-gnueabi/eglibc/2.19-r0/build-arm-poky-linux-gnueabi/libc_pic.os:
In function `__getpwuid_r':
 > |
/home/lachlan/poky/build-atmel/tmp/work/cortexa5t2hf-vfp-poky-linux-gnueabi/eglibc/2.19-r0/eglibc-2.19/libc/pwd/../nss/getXXbyYY_r.c:196:
undefined reference to `__nscd_getpwuid_r'
 > |
/home/lachlan/poky/build-atmel/tmp/work/cortexa5t2hf-vfp-poky-linux-gnueabi/eglibc/2.19-r0/eglibc-2.19/libc/pwd/../nss/getXXbyYY_r.c:213:
undefined reference to `__nss_not_use_nscd_passwd'
 > |
/home/lachlan/poky/build-atmel/tmp/work/cortexa5t2hf-vfp-poky-linux-gnueabi/eglibc/2.19-r0/eglibc-2.19/libc/pwd/../nss/getXXbyYY_r.c:213:
undefined reference to `__nss_database_custom'
 > |
/home/lachlan/poky/build-atmel/tmp/sysroots/x86_64-linux/usr/libexec/cortexa5t2hf-vfp-poky-linux-gnueabi.gcc-cross-initial/gcc/arm-poky-linux-gnueabi/4.8.2/ld:
/home/lachlan/poky/build-atmel/tmp/work/cortexa5t2hf-vfp-poky-linux-gnueabi/eglibc/2.19-r0/build-arm-poky-linux-gnueabi/libc.so:
hidden symbol `__nss_not_use_nscd_group' isn't defined
 > |
/home/lachlan/poky/build-atmel/tmp/sysroots/x86_64-linux/usr/libexec/cortexa5t2hf-vfp-poky-linux-gnueabi.gcc-cross-initial/gcc/arm-poky-linux-gnueabi/4.8.2/ld:
final link failed: Bad value
 > | collect2: error: ld returned 1 exit status
 > | ERROR: Function failed: do_compile (log file is located
 > at
/home/lachlan/poky/build-atmel/tmp/work/cortexa5t2hf-vfp-poky-linux-gnueabi/eglibc/2.19-r0/temp/log.do_compile.5266)
 > ERROR: Task 39
 > (/home/lachlan/poky/meta/recipes-core/eglibc/eglibc_2.19.bb,
 > do_compile) failed with exit code '1'
 > 
 > 
 > I have reviewed the sample.conf.extended file in the meta-yocto
later
 > and the above code should be OK, except that I have added the '+'
and
 > 'append'. If I use DISTRO_FEATURES instead of
DISTRO_FEATURES_append,
 > I get other errros:
 > Missing or unbuildable dependency chain was:
 > ['packagegroup-base-wifi']
 > ERROR: Required build target 'atmel-qt5-demo-image' has no
buildable
 > providers.
 > Missing or unbuildable dependency chain was:
['atmel-qt5-demo-image',
 > 'packagegroup-base-wifi']
 > 
 > If I use DISTRO_FEATURES_LIBC = instead of DISTRO_FEATURES_LIBC +=
, I
 > get these errors:
 > ERROR: Unable to
 > parse
/home/lachlan/poky/meta/recipes-core/packagegroups/packagegroup-core-boot.bb:
Exited with "1"# | ETA: 00:00:39
 > ERROR: Please ensure that your setting of
VIRTUAL-RUNTIME_init_manager
 > (sysvinit) matches the entries enabled in DISTRO_FEATURES
 > 
 > 
 > I am probably overriding a default setting. Is there an
alternative
 > way to include the libc-libm, or is there something else that
could
 > be causing the erro?
 > 
 > Thanks for any help
 > 
 > Lachlan
 > ---- Message sent via Adam Internet WebMail -
http://www.adam.com.au/

---- Message sent via Adam Internet WebMail - http://www.adam.com.au/
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