# Some Linux distributions (including RHEL7, SLES13, Debian 8) still
# have older compilers as their default, so we make it explicit for
# these that our host tools are GNU11 (i.e. C11 w/ GNU extensions).
+CSTD_FLAG := -std=gnu11
ifeq ($(HOSTOS),linux)
-HOSTCFLAGS += --std=gnu11
+HOSTCFLAGS += $(CSTD_FLAG)
endif
ifeq ($(HOSTOS),cygwin)
KBUILD_CFLAGS := -Wall -Wstrict-prototypes \
-Wno-format-security \
- -fno-builtin -ffreestanding
+ -fno-builtin -ffreestanding $(CSTD_FLAG)
KBUILD_CFLAGS += -fshort-wchar
KBUILD_AFLAGS := -D__ASSEMBLY__