libfdt: prefix header search paths with $(srctree)/

Currently, the Kbuild core manipulates header search paths in a crazy
way [1].

To fix this mess, I want all Makefiles to add explicit $(srctree)/ to
the search paths in the srctree. Some Makefiles are already written in
that way, but not all. The goal of this work is to make the notation
consistent, and finally get rid of the gross hacks.

Having whitespaces after -I does not matter since commit d53093277c3a
("kbuild: do not drop -I without parameter").

[1]: https://patchwork.kernel.org/patch/9632347/

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

diff --git a/lib/Makefile b/lib/Makefile
index 4e066120a0d6be50ed8161b87d6297095d12cbf9..3b08673e8881a42c9abcd67269455f69fbd9ceb0 100644 (file)
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -213,7 +213,7 @@ KCOV_INSTRUMENT_stackdepot.o := n
 libfdt_files = fdt.o fdt_ro.o fdt_wip.o fdt_rw.o fdt_sw.o fdt_strerror.o \
               fdt_empty_tree.o
 $(foreach file, $(libfdt_files), \
-       $(eval CFLAGS_$(file) = -I$(src)/../scripts/dtc/libfdt))
+       $(eval CFLAGS_$(file) = -I $(srctree)/scripts/dtc/libfdt))
 lib-$(CONFIG_LIBFDT) += $(libfdt_files)
 
 obj-$(CONFIG_RBTREE_TEST) += rbtree_test.o