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kbuild: remove 'addtree' and 'flags' magic for header search paths

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The 'addtree' and 'flags' in scripts/Kbuild.include are so compilecated
and ugly.

As I mentioned in [1], Kbuild should stop automatic prefixing of header
search path options.

I fixed up (almost) all Makefiles in the kernel. Now 'addtree' and
'flags' have been removed.

Kbuild still caters to add $(srctree)/$(src) and $(objtree)/$(obj)
to the header search path for O= building, but never touches extra
compiler options from ccflags-y etc.

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

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Masahiro Yamada
2019-05-13 15:22:17 +09:00
parent 9cc342f6c4
commit cdd750bfb1
3 changed files with 13 additions and 33 deletions
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12
scripts/Makefile.host
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@@ -67,18 +67,16 @@ _hostc_flags = $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
_hostcxx_flags = $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
$(HOSTCXXFLAGS_$(basetarget).o)
__hostc_flags = $(_hostc_flags)
__hostcxx_flags = $(_hostcxx_flags)
# $(objtree)/$(obj) for including generated headers from checkin source files
ifeq ($(KBUILD_EXTMOD),)
ifneq ($(srctree),.)
__hostc_flags = -I$(obj) $(call flags,_hostc_flags)
__hostcxx_flags = -I$(obj) $(call flags,_hostcxx_flags)
_hostc_flags += -I $(objtree)/$(obj)
_hostcxx_flags += -I $(objtree)/$(obj)
endif
endif
hostc_flags = -Wp,-MD,$(depfile) $(__hostc_flags)
hostcxx_flags = -Wp,-MD,$(depfile) $(__hostcxx_flags)
hostc_flags = -Wp,-MD,$(depfile) $(_hostc_flags)
hostcxx_flags = -Wp,-MD,$(depfile) $(_hostcxx_flags)
#####
# Compile programs on the host