Failing to build with 4.18 kernel headers about libkcapi HOT 7 CLOSED

In file included from /usr/include/sys/select.h:33,
                 from /usr/include/sys/types.h:196,
                 from /usr/include/sys/uio.h:22,
                 from lib/internal.h:29,
                 from lib/kcapi-sym.c:21:
/usr/include/bits/types/sigset_t.h:7:20: error: conflicting types for 'sigset_t'
 typedef __sigset_t sigset_t;
                    ^~~~~~~~
In file included from /usr/include/linux/signal.h:5,
                 from /usr/include/linux/aio_abi.h:32,
                 from lib/internal.h:26,
                 from lib/kcapi-sym.c:21:
/usr/include/asm/signal.h:16:23: note: previous declaration of 'sigset_t' was here
 typedef unsigned long sigset_t;
                       ^~~~~~~~
In file included from /usr/include/sys/select.h:37,
                 from /usr/include/sys/types.h:196,
                 from /usr/include/sys/uio.h:22,
                 from lib/internal.h:29,
                 from lib/kcapi-sym.c:21:
/usr/include/bits/types/struct_timeval.h:8:8: error: redefinition of 'struct timeval'
 struct timeval
        ^~~~~~~
In file included from /usr/include/asm/signal.h:7,
                 from /usr/include/linux/signal.h:5,
                 from /usr/include/linux/aio_abi.h:32,
                 from lib/internal.h:26,
                 from lib/kcapi-sym.c:21:
/usr/include/linux/time.h:16:8: note: originally defined here
 struct timeval {
        ^~~~~~~