$bitbake core-image-minimal
NOTE: Out of date cache found, rebuilding...
Parsing recipes: 100% |########################################################################################################################################################################################################################################################################################| Time: 00:00:11
Parsing of 809 .bb files complete (0 cached, 809 parsed). 1082 targets, 38 skipped, 0 masked, 0 errors.
WARNING: No bb files matched BBFILE_PATTERN_emac '^/mnt/oe/poky/meta-emac/'

OE Build Configuration:
BB_VERSION        = "1.15.0"
TARGET_ARCH       = "arm"
TARGET_OS         = "linux-gnueabi"
MACHINE           = "som9m10g45"
DISTRO            = "poky"
DISTRO_VERSION    = "1.1+snapshot-20120311"
TUNE_FEATURES     = "armv5 dsp thumb"
TARGET_FPU        = "soft"
meta              = "master:4a8a3c503fd896593b787c26edbe46a7324e494e"
meta-emac         = "master:3aeb5ebb39a04d32b1b9bcb9994be1fc2704e643"
meta-yocto        = "master:4a8a3c503fd896593b787c26edbe46a7324e494e"

NOTE: Resolving any missing task queue dependencies
ERROR: Nothing RPROVIDES 'perf' (but /mnt/oe/poky/meta/recipes-core/tasks/task-core-tools.bb RDEPENDS on or otherwise requires it)
NOTE: Runtime target 'perf' is unbuildable, removing...
Missing or unbuildable dependency chain was: ['perf']
NOTE: Runtime target 'task-core-tools-debug' is unbuildable, removing...
Missing or unbuildable dependency chain was: ['task-core-tools-debug', 'perf']
ERROR: Required build target 'core-image-minimal' has no buildable providers.
Missing or unbuildable dependency chain was: ['core-image-minimal', 'task-core-tools-debug', 'perf']
Summary: There were 2 WARNING messages shown.

Summary: There were 2 ERROR messages shown, returning a non-zero exit code.