Home
last modified time | relevance | path

Searched hist:"87 d599fc3955e59b1ed30f350321a4be5353f945" (Results 1 – 1 of 1) sorted by relevance

/openbmc/linux/
H A DMakefile87d599fc3955e59b1ed30f350321a4be5353f945 Tue Dec 13 05:24:20 CST 2022 Masahiro Yamada <masahiroy@kernel.org> kbuild: ensure Make >= 3.82 is used

Documentation/process/changes.rst notes the minimal GNU Make version,
but it is not checked anywhere.

We could check $(MAKE_VERSION), but another simple way is to check
$(.FEATURES) since the feature list always grows.

GNU Make 3.81 expands $(.FEATURES) to:
target-specific order-only second-expansion else-if archives jobserver check-symlink

GNU Make 3.82 expands $(.FEATURES) to:
target-specific order-only second-expansion else-if shortest-stem undefine archives jobserver check-symlink

To ensure Make >= 3.82, you can check either 'shortest-stem' or
'undefine'.

This way is not always possible. For example, Make 4.0 through 4.2 have
the same set of $(.FEATURES). At that point, we will need to come up
with a different approach.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>