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authorArnd Bergmann <arnd@arndb.de>2016-04-25 17:35:27 +0200
committerMichal Marek <mmarek@suse.com>2016-05-10 17:12:48 +0200
commit877417e6ffb9578e8580abf76a71e15732473456 (patch)
tree607b51ebf3c00b83f5c89777e7cfd0f46349605a /Documentation
parent51193b76bfff5027cf96ba63effae808ad67cca7 (diff)
Kbuild: change CC_OPTIMIZE_FOR_SIZE definition
CC_OPTIMIZE_FOR_SIZE disables the often useful -Wmaybe-unused warning, because that causes a ridiculous amount of false positives when combined with -Os. This means a lot of warnings don't show up in testing by the developers that should see them with an 'allmodconfig' kernel that has CC_OPTIMIZE_FOR_SIZE enabled, but only later in randconfig builds that don't. This changes the Kconfig logic around CC_OPTIMIZE_FOR_SIZE to make it a 'choice' statement defaulting to CC_OPTIMIZE_FOR_PERFORMANCE that gets added for this purpose. The allmodconfig and allyesconfig kernels now default to -O2 with the maybe-unused warning enabled. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Michal Marek <mmarek@suse.com>
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