Need modify Makefile

[LSang]

error:

FATAL:  could not load library "/usr/local/pipelinedb_0.9.8/lib/pipelinedb/pipeline_kafka.so": /usr/local/pipelinedb_0.9.8/lib/pipelinedb/pipeline_kafka.so: undefined symbol: sasl_client_step

SHLIB_LINK += -lz -lpthread -lssl -lsasl2 -lrt

need add -lsasl2