BuildPackage expands the full BuildTarget/ipkg for every package in a
Makefile, whether it is selected or not. package/kernel/linux defines
more than 1000 kmods, and this takes about 0.9 s of its 1.2 s parse,
which is on the critical path of every build.
Move the clean rule into BuildTarget/ipkg/disabled, and only expand it
for packages that are not selected, unless DEVELOPER is set. The other
rules of such a package can not be reached, as its compile target only
depends on them if the package is selected. Target types without a
disabled variant are expanded as before.
Signed-off-by: John Crispin <john@phrozen.org>
John Crispin
9772acb4f7
