Makefile: revert to c11 from c17, as not-so-old MacOS systems  (via clang) don't know c17
@@ -26,7 +26,7 @@ LD = $(CC)
BIN := honggfuzz
HFUZZ_CC_BIN := hfuzz_cc/hfuzz-cc
HFUZZ_CC_SRCS := hfuzz_cc/hfuzz-cc.c
-COMMON_CFLAGS := -std=c17 -I/usr/local/include -D_GNU_SOURCE -Wall -Wextra -Werror -Wno-format-truncation -Wno-override-init -I.
+COMMON_CFLAGS := -std=c11 -I/usr/local/include -D_GNU_SOURCE -Wall -Wextra -Werror -Wno-format-truncation -Wno-override-init -I.
COMMON_LDFLAGS := -pthread -lm
COMMON_SRCS := $(sort $(wildcard *.c))
CFLAGS ?= -O3 -mtune=native -funroll-loops
