MAN1_DIR ?= $(DESTDIR)/usr/share/man/man1
LIBS := libsystemd
-CFLAGS += -Werror -Wall -Wextra -Wl,-z,relro -g -O2
+CFLAGS += -Werror -Wall -Wextra -Wl,-z,relro -g -O2 --std=gnu11
CFLAGS += -fstack-protector-strong -D_FORTIFY_SOURCE=2
CFLAGS += $(shell pkg-config --cflags $(LIBS))
LDFLAGS += $(shell pkg-config --libs $(LIBS))