[yocto] libm implementation issue

[Benjamin Esquivel]

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 <math>
> 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
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