Yes, I’d spotted this might be a problem recently when looking at fuse commit history.  Fuse started off with one prototype, then updated and we updated daos to match, then they more recently added version checking to support both interfaces simultaneously which has caused the error you’re seeing.

I think the best approach would be for us to change the FUSE_USE_VERSION we define, but to do that we need to check what’s changed in the intervening versions.

Ashley.

from the config, FUSE_USE_VERSION is defined to 32

        reqs.define('fuse', libs=['fuse3'], defines=["FUSE_USE_VERSION=32"],
        headers=['fuse3/fuse.h'], package='fuse3-devel') 
from git fuse src, when this version is defined under 35, the first ioctl signature will be used, here the cmd type is int



from daos srce code, "unsigned int cmd" is used, which is not compatible with the first definition, so the compilation will fail. After comment out "unsigned", everything is compiled successfully.