changing c standard

src/Makefile.am

@@ -1,7 +1,7 @@
 AUTOMAKE_OPTIONS =      foreign
 SUBDIRS=                unit-tests
 CLEANFILES =            libantman.a
-EXTRA_FLAGS =           -std=c11 -Wall -O2 -ggdb3 
+EXTRA_FLAGS =           -std=gnu99 -Wall -O2 -ggdb3 
 LD_ADD =                -lpthread -lm -lz -lfswatch
 OBJS =                  bloom.o config.o daemonize.o frozen.o hashmap.o heap.o murmurhash2.o sequence.o sketch.o slog.o watcher.o workerpool.o
 

src/daemonize.c

@@ -1,5 +1,4 @@
 #include <pthread.h>
-#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>