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of/lib: Allow scripts/dtc/libfdt to be used from kernel code

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libfdt is part of the device tree support in scripts/dtc/libfdt.  For
some platforms that use the Device Tree, we want to be able to edit
the flattened device tree form.

We don't want to burden kernel builds that do not require it, so we
gate compilation of libfdt files with CONFIG_LIBFDT.  So if it is
needed, you need to do this in your Kconfig:

	select LIBFDT

And in the Makefile of the code using libfdt something like:

ccflags-y := -I$(src)/../../../scripts/dtc/libfdt

Signed-off-by: David Daney <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Grant Likely <[email protected]>
Cc: [email protected]
Acked-by: Rob Herring <[email protected]>
Signed-off-by: Ralf Baechle <[email protected]>
This commit is contained in:
David Daney 2012-07-05 18:12:38 +02:00 • committed by Ralf Baechle
commit ab25383983
10 changed files with 44 additions and 0 deletions
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5
lib/Makefile
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@ -130,6 +130,11 @@ obj-$(CONFIG_GENERIC_STRNLEN_USER) += strnlen_user.o
obj-$(CONFIG_STMP_DEVICE) += stmp_device.o
libfdt_files = fdt.o fdt_ro.o fdt_wip.o fdt_rw.o fdt_sw.o fdt_strerror.o
$(foreach file, $(libfdt_files), \
$(eval CFLAGS_$(file) = -I$(src)/../scripts/dtc/libfdt))
lib-$(CONFIG_LIBFDT) += $(libfdt_files)
hostprogs-y := gen_crc32table
clean-files := crc32table.h