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kbuild: remove header compile test

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There are both positive and negative options about this feature.
At first, I thought it was a good idea, but actually Linus stated a
negative opinion (https://lkml.org/lkml/2019/9/29/227). I admit it
is ugly and annoying.

The baseline I'd like to keep is the compile-test of uapi headers.
(Otherwise, kernel developers have no way to ensure the correctness
of the exported headers.)

I will maintain a small build rule in usr/include/Makefile.
Remove the other header test functionality.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Masahiro Yamada
2019-11-07 16:14:40 +09:00
parent eba19032f9
commit fcbb8461fd
8 changed files with 9 additions and 1252 deletions
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12
usr/include/Makefile
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@@ -95,9 +95,13 @@ endif
# asm-generic/*.h is used by asm/*.h, and should not be included directly
header-test- += asm-generic/%
# The rest are compile-tested
header-test-y += $(filter-out $(header-test-), \
$(patsubst $(obj)/%,%, $(wildcard \
$(addprefix $(obj)/, *.h */*.h */*/*.h */*/*/*.h))))
extra-y := $(patsubst %.h,%.hdrtest, $(filter-out $(header-test-), \
$(patsubst $(obj)/%,%, $(shell find $(obj) -name '*.h'))))
quiet_cmd_hdrtest = HDRTEST $<
cmd_hdrtest = $(CC) $(c_flags) -S -o /dev/null -x c /dev/null -include $<; touch $@
$(obj)/%.hdrtest: $(obj)/%.h FORCE
$(call if_changed_dep,hdrtest)
clean-files += $(filter-out Makefile, $(notdir $(wildcard $(obj)/*)))