diff -u -r ../grpc-1.8.3/Makefile ./Makefile
--- ../grpc-1.8.3/Makefile	2017-12-31 20:38:59.000000000 +0000
+++ ./Makefile	2018-01-13 00:48:23.449627239 +0000
@@ -369,7 +369,7 @@
 endif
 
 ifeq ($(SYSTEM),Linux)
-LIBS = dl rt m pthread
+LIBS = dl m
 LDFLAGS += -pthread
 endif