Include fmacros.h to make sure strerror_p is defined on Linux

Makefile

@@ -50,7 +50,7 @@ all: ${DYLIBNAME} ${BINS}
 net.o: net.c fmacros.h net.h hiredis.h
 async.o: async.c async.h hiredis.h sds.h util.h dict.c dict.h
 example.o: example.c hiredis.h
-hiredis.o: hiredis.c hiredis.h net.h sds.h util.h
+hiredis.o: hiredis.c fmacros.h hiredis.h net.h sds.h util.h
 sds.o: sds.c sds.h
 test.o: test.c hiredis.h
 

hiredis.c

@@ -29,6 +29,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include "fmacros.h"
 #include <string.h>
 #include <stdlib.h>
 #include <unistd.h>