Fix uninitialized variables num_channels, elem_size.
Comment unused label: ERROR_CLEAN_SAMPLER.
Remove unused variables: k, toReff.
Silence the unused variable warning by void cast.
Remove unused global variable: queue_list.
Remove unused variable: td.
Remove unused variable: width, height, order, type.
Remove unused variable: buf.
Add missing -lpthread to libpocl_la_LIBADD.
Check the return value of clEnqueueReadBuffer.
Remove unused variable: flags.
Remove unused variable: err.
Remove unused variable: err.
Remove unused variable: err.
Remove unused variable: err.
Remove unused variable: err.
Remove unused variable: err.
Remove unused variable: err.
Remove unused variable: err.
Remove unused variable: err.