Running '. ./oe-init-build-env; bitbake aws-iot-device-sdk-cpp-v2 -k' with output to /srv/pokybuild/yocto-worker/meta-aws/build/build/command-2-build-targets.log This is the default build configuration for the Poky reference distribution. ### Shell environment set up for builds. ### You can now run 'bitbake <target>' Common targets are: core-image-minimal core-image-full-cmdline core-image-sato core-image-weston meta-toolchain meta-ide-support You can also run generated qemu images with a command like 'runqemu qemux86-64'. Other commonly useful commands are: - 'devtool' and 'recipetool' handle common recipe tasks - 'bitbake-layers' handles common layer tasks - 'oe-pkgdata-util' handles common target package tasks NOTE: Reconnecting to bitbake server... Loading cache...done. Loaded 0 entries from dependency cache. Checking cache validity...done. Checked 2971 cache entries for validity. Parsing recipes...ERROR: ExpansionError during parsing /srv/pokybuild/yocto-worker/meta-aws/build/meta-openembedded/meta-oe/recipes-devtools/suitesparse/suitesparse_5.10.1.bb bb.data_smart.ExpansionError: Failure expanding variable CFLAGS:prepend[:=], expression was ${@" ".join(d.getVar('CC').split()[1:])} which triggered exception AttributeError: 'NoneType' object has no attribute 'split' The variable dependency chain for the failure is: CFLAGS:prepend[:=] ERROR: Parsing halted due to errors, see error messages above Summary: There were 2 ERROR messages, returning a non-zero exit code.