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dts/Makefile: pass -undef -D__DTS__ to cpp

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This brings U-Boot's cpp invocation into line with the way the Linux
kernel invokes cpp on device trees. Consistency will be useful to ensure
*.dts is portable between the two.

-undef also has the added advantage of not defining "linux", so DT
property names such as "linux,keymap" don't get mangled.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Stephen Warren 2013-07-24 10:09:24 -07:00 • committed by Tom Rini
parent 32ac4bd9ca
commit f53932addd
1 changed files with 1 additions and 1 deletions
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dts/Makefile
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@ -21,7 +21,7 @@ DTS_INCDIRS = $(SRCTREE)/board/$(VENDOR)/$(BOARD)/dts
DTS_INCDIRS += $(SRCTREE)/board/$(VENDOR)/dts
DTS_INCDIRS += $(SRCTREE)/arch/$(ARCH)/dts
DTS_CPPFLAGS := -x assembler-with-cpp \
DTS_CPPFLAGS := -x assembler-with-cpp -undef -D__DTS__ \
-nostdinc $(addprefix -I,$(DTS_INCDIRS))
DTC_FLAGS := -R 4 -p 0x1000 \