--- Makefile.orig	2017-05-18 12:29:44 UTC
+++ Makefile
@@ -21,7 +21,7 @@ VERSION=0.08.02
 # Codename "harmful hardware harasser"
 #
 
-CFLAGS += -Wall -Wextra -DVERSION='"$(VERSION)"' -O2 -std=gnu99
+CFLAGS += -Wall -Wextra -DVERSION='"$(VERSION)"' -O2 -std=gnu11
 
 #
 # Pedantic flags
@@ -786,7 +786,7 @@ stress-cpu.o: stress-cpu.c
 	@rm -f test-decimal.c test-decimal.o
 
 perf.o: perf.c perf-event.c
-	@gcc -E perf-event.c | grep "PERF_COUNT" | sed 's/,/ /' | awk {'print "#define _SNG_" $$1 " (1)"'} > perf-event.h
+	@$(CC) -E perf-event.c | grep "PERF_COUNT" | sed 's/,/ /' | awk {'print "#define _SNG_" $$1 " (1)"'} > perf-event.h
 	@echo $(CC) $(CFLAGS) -c -o $@ $<
 	@$(CC) $(CFLAGS) -c -o $@ $<
 
