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authorGeert Uytterhoeven <geert+renesas@glider.be>2020-12-08 18:28:56 +0300
committerMasahiro Yamada <masahiroy@kernel.org>2020-12-21 07:57:08 +0300
commitc613583b6a87434123fc6714acbec6522859185e (patch)
tree19a36a5202860a5b65ae2efd25af05999d12d1ca /Documentation/kbuild
parent9ab55d7f240fb05f84ec3b5e37f0c3ab2ce69053 (diff)
downloadlinux-c613583b6a87434123fc6714acbec6522859185e.tar.xz
Documentation/kbuild: Document COMPILE_TEST dependencies
Document best practises for using COMPILE_TEST dependencies. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'Documentation/kbuild')
-rw-r--r--Documentation/kbuild/kconfig-language.rst11
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/kbuild/kconfig-language.rst b/Documentation/kbuild/kconfig-language.rst
index 1cf1aebdd6cd..1b4875f04e13 100644
--- a/Documentation/kbuild/kconfig-language.rst
+++ b/Documentation/kbuild/kconfig-language.rst
@@ -553,6 +553,17 @@ with "depends on m". E.g.::
limits FOO to module (=m) or disabled (=n).
+Compile-testing
+~~~~~~~~~~~~~~~
+If a config symbol has a dependency, but the code controlled by the config
+symbol can still be compiled if the dependency is not met, it is encouraged to
+increase build coverage by adding an "|| COMPILE_TEST" clause to the
+dependency. This is especially useful for drivers for more exotic hardware, as
+it allows continuous-integration systems to compile-test the code on a more
+common system, and detect bugs that way.
+Note that compile-tested code should avoid crashing when run on a system where
+the dependency is not met.
+
Kconfig recursive dependency limitations
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~