ifneq ("$(OPENTHREADS_INC_DIR)","")
INC += -I$(OPENTHREADS_INC_DIR)
endif

ifneq ("$(PRODUCER_INC_DIR)","")
INC += -I$(PRODUCER_INC_DIR)
endif

ifneq ("$(OSG_INC_DIR)","")
INC += -I$(OSG_INC_DIR)
endif

ifneq ("$(OPENTHREADS_LIB_DIR)","")
LDFLAGS += -L$(OPENTHREADS_LIB_DIR)
endif

ifneq ("$(PRODUCER_LIB_DIR)","")
LDFLAGS += -L$(PRODUCER_LIB_DIR)
endif

ifneq ("$(OSG_LIB_DIR)","")
LDFLAGS += -L$(OSG_LIB_DIR)
endif