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kbuild: compile-test kernel headers to ensure they are self-contained

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The headers in include/ are globally used in the kernel source tree
to provide common APIs. They are included from external modules, too.

It will be useful to make as many headers self-contained as possible
so that we do not have to rely on a specific include order.

There are more than 4000 headers in include/. In my rough analysis,
70% of them are already self-contained. With efforts, most of them
can be self-contained.

For now, we must exclude more than 1000 headers just because they
cannot be compiled as standalone units. I added them to header-test-.
The blacklist was mostly generated by a script, so the reason of the
breakage should be checked later.

Signed-off-by: Masahiro Yamada <[email protected]>
Tested-by: Jani Nikula <[email protected]>
Reviewed-by: Joel Fernandes (Google) <[email protected]>
This commit is contained in:
Masahiro Yamada 2019-07-01 09:58:45 +09:00
commit 43c78d8803
3 changed files with 1282 additions and 0 deletions
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11
init/Kconfig
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@ -108,6 +108,17 @@ config HEADER_TEST
If you are a developer or tester and want to ensure the requested
headers are self-contained, say Y here. Otherwise, choose N.
config KERNEL_HEADER_TEST
bool "Compile test kernel headers"
depends on HEADER_TEST
help
Headers in include/ are used to build external moduls.
Compile test them to ensure they are self-contained, i.e.
compilable as standalone units.
If you are a developer or tester and want to ensure the headers
in include/ are self-contained, say Y here. Otherwise, choose N.
config UAPI_HEADER_TEST
bool "Compile test UAPI headers"
depends on HEADER_TEST && HEADERS_INSTALL && CC_CAN_LINK