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kbuild: do not add $(srctree) or $(objtree) to header search paths

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scripts/Makefile.lib is included not only from scripts/Makefile.build
but also from scripts/Makefile.{vmlinux,modfinal} for building generated
C files.

In scripts/Makefile.{vmlinux,modfinal}, $(obj) and $(src) are empty.

Therefore, the header include paths:

    -I $(srctree)/$(src) -I $(objtree)/$(obj)

... become meaningless code:

    -I $(srctree)/ -I $(objtree)/

Add these paths only when 'obj' and 'src' are defined.

Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/oe-kbuild-all/202404170634.BlqTaYA0-lkp@intel.com/
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <n.schier@avm.de>
This commit is contained in:
Masahiro Yamada 2024-04-27 23:55:00 +09:00
parent b957df3b85
commit 9dcb47a616
1 changed files with 3 additions and 3 deletions
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6
scripts/Makefile.lib
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@ -213,9 +213,9 @@ endif
# $(objtree)/$(obj) for including generated headers from checkin source files
ifeq ($(KBUILD_EXTMOD),)
ifdef building_out_of_srctree
_c_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj)
_a_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj)
_cpp_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj)
_c_flags += $(addprefix -I $(srctree)/,$(src)) $(addprefix -I $(objtree)/,$(obj))
_a_flags += $(addprefix -I $(srctree)/,$(src)) $(addprefix -I $(objtree)/,$(obj))
_cpp_flags += $(addprefix -I $(srctree)/,$(src)) $(addprefix -I $(objtree)/,$(obj))
endif
endif