Hi Michael, 2017-03-17 9:15 GMT+09:00 Michael Davidson <md@xxxxxxxxxx>: > Unfortunately, while clang generates a warning about these flags > being unsupported it still exits with a status of 0 so we have > to explicitly disable them instead of just using a cc-option check. > > Signed-off-by: Michael Davidson <md@xxxxxxxxxx> Instead, does the following work for you? https://patchwork.kernel.org/patch/9657285/ You need to use $(call cc-option, ...) for -falign-jumps=1 and -falign-loops=1 -- Best Regards Masahiro Yamada