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Makefile: Ensure we build with -std=gnu11

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As many targets are now commonly built with gcc-6 or later (which
defaults to a newer C standard than older compilers), certain C
constructs are now being used as they produce more readable code.  And
while all compilers that we support building with support the C11
standard (and GNU11) they do not default to that standard.  Ensure that
we pass along -std=gnu11 when building.

Signed-off-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Tom Rini 2018-06-19 23:53:54 -04:00
parent a5742efa20
commit fa893990e9
1 changed files with 3 additions and 2 deletions
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5
Makefile
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@ -263,8 +263,9 @@ HOSTCXXFLAGS = -O2
# 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)
@ -370,7 +371,7 @@ KBUILD_CPPFLAGS := -D__KERNEL__ -D__UBOOT__
KBUILD_CFLAGS := -Wall -Wstrict-prototypes \
-Wno-format-security \
-fno-builtin -ffreestanding
-fno-builtin -ffreestanding $(CSTD_FLAG)
KBUILD_CFLAGS += -fshort-wchar
KBUILD_AFLAGS := -D__ASSEMBLY__