hacked Makefiles to make it build on macOs

examples/twoway/Makefile

@@ -4,10 +4,14 @@ TARGETS=client server
 LABCOMM_JAR=../../compiler/labcomm2014_compiler.jar
 LABCOMM=java -jar $(LABCOMM_JAR)
 
+#include ../../lib/c/os_compat.mk
+
 CFLAGS=-O3 -g -Wall -Werror -I../../lib/c/2014 -I. -Wno-unused-function
 
 ifeq ($(UNAME_S),Darwin)
-    CFLAGS+=-DLABCOMM_COMPAT=\"labcomm_compat_osx.h\" -DLABCOMM_OS_DARWIN=1  -Wno-tautological-compare
+    CFLAGS+=-DLABCOMM_COMPAT=\"labcomm2014_compat_osx.h\" -DLABCOMM_OS_DARWIN=1
+else
+    CFLAGS+=-Wno-tautological-compare
 endif
 
 all: $(TARGETS:%=gen/%)

lib/c/os_compat.mk

@@ -15,7 +15,7 @@ else ifeq ($(UNAME_S),Darwin)
   CC=$(CROSS_COMPILE)gcc
   LD=$(CROSS_COMPILE)gcc
   CFLAGS=-g -Wall -Werror -O3  -I. -Itest \
-	 -DLABCOMM_COMPAT=\"labcomm_compat_osx.h\" \
+	 -DLABCOMM_COMPAT=\"labcomm$(LIBVERSION)_compat_osx.h\" \
 	 -DLABCOMM_OS_DARWIN=1
 #	 -Wno-tautological-compare -Wno-unused-function
   CFLAGS+=-std=c99