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} " 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/
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