Emilio López <emilio.lo...@collabora.co.uk> writes: > El 22/09/16 a las 06:43, Michael Ellerman escribió: >> Emilio López <emilio.lo...@collabora.co.uk> writes: >> >> Please don't include the *kernel* headers, they're really not meant to >> be used in userspace programs :) >> >>> +CFLAGS += -I../../../../usr/include/ >> >> That is the correct place to get them from. They'll have been put there >> by 'make headers_install'. > > My inspiration here has been tools/testing/selftests/memfd/Makefile, > which does it this way. If I only include the ones on usr then it > doesn't build, as there's no sync_file.h available, even after running > make headers_install. How am I supposed to use the ioctls from there?
It looks like it's missing from include/uapi/linux/Kbuild, you need to add it to the list of exported headers: diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild index dd604395606b..40411b4ff012 100644 --- a/include/uapi/linux/Kbuild +++ b/include/uapi/linux/Kbuild @@ -397,6 +397,7 @@ header-y += stddef.h header-y += string.h header-y += suspend_ioctls.h header-y += swab.h +header-y += sync_file.h header-y += synclink.h header-y += sysctl.h header-y += sysinfo.h cheers
