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Commit e846f0dc authored by Jani Nikula's avatar Jani Nikula Committed by Masahiro Yamada
Browse files

kbuild: add support for ensuring headers are self-contained 



Sometimes it's useful to be able to explicitly ensure certain headers
remain self-contained, i.e. that they are compilable as standalone
units, by including and/or forward declaring everything they depend on.

Add special target header-test-y where individual Makefiles can add
headers to be tested if CONFIG_HEADER_TEST is enabled. This will
generate a dummy C file per header that gets built as part of extra-y.

Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Reviewed-by: default avatarSam Ravnborg <sam@ravnborg.org>
Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
parent 0315bb7a

.gitignore

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@@ -22,6 +22,7 @@ 
*.elf

*.gcno

*.gz

*.hdrtest.c

*.i

*.ko

*.lex.c

Documentation/dontdiff

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@@ -19,6 +19,7 @@ 
*.grep

*.grp

*.gz

*.hdrtest.c

*.html

*.i

*.jpeg

Documentation/kbuild/makefiles.txt

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@@ -1018,6 +1018,13 @@ When kbuild executes, the following steps are followed (roughly): 
	In this example, extra-y is used to list object files that

	shall be built, but shall not be linked as part of built-in.a.



    header-test-y



	header-test-y specifies headers (*.h) in the current directory that

	should be compile tested to ensure they are self-contained,

	i.e. compilable as standalone units. If CONFIG_HEADER_TEST is enabled,

	this autogenerates dummy sources to include the headers, and builds them

	as part of extra-y.



--- 6.7 Commands useful for building a boot image

Makefile

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@@ -1647,6 +1647,7 @@ clean: $(clean-dirs) 
		-o -name '*.dwo' -o -name '*.lst' \

		-o -name '*.su'  \

		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \

		-o -name '*.hdrtest.c' \

		-o -name '*.lex.c' -o -name '*.tab.[ch]' \

		-o -name '*.asn1.[ch]' \

		-o -name '*.symtypes' -o -name 'modules.order' \

drivers/gpu/drm/i915/.gitignore

deleted100644 → 0
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header_test_*.c