>>> linuxptp 2.0 Downloading
--2019-02-10 11:40:43--  http://downloads.sourceforge.net/linuxptp/linuxptp-2.0.tgz
Resolving downloads.sourceforge.net (downloads.sourceforge.net)... 216.105.38.13
Connecting to downloads.sourceforge.net (downloads.sourceforge.net)|216.105.38.13|:80... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: http://downloads.sourceforge.net/project/linuxptp/v2.0/linuxptp-2.0.tgz [following]
--2019-02-10 11:40:43--  http://downloads.sourceforge.net/project/linuxptp/v2.0/linuxptp-2.0.tgz
Reusing existing connection to downloads.sourceforge.net:80.
HTTP request sent, awaiting response... 302 Found
Location: https://freefr.dl.sourceforge.net/project/linuxptp/v2.0/linuxptp-2.0.tgz [following]
--2019-02-10 11:40:43--  https://freefr.dl.sourceforge.net/project/linuxptp/v2.0/linuxptp-2.0.tgz
Resolving freefr.dl.sourceforge.net (freefr.dl.sourceforge.net)... 88.191.250.136, 2a01:e0d:1:8:58bf:fa88:0:1
Connecting to freefr.dl.sourceforge.net (freefr.dl.sourceforge.net)|88.191.250.136|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 184942 (181K) [application/octet-stream]
Saving to: '/home/buildroot/autobuild/run/instance-0/output/build/.linuxptp-2.0.tgz.07OIDy/output'

     0K .......... .......... .......... .......... .......... 27% 3.07M 0s
    50K .......... .......... .......... .......... .......... 55% 6.07M 0s
   100K .......... .......... .......... .......... .......... 83% 12.3M 0s
   150K .......... .......... ..........                      100% 7.50M=0.03s

2019-02-10 11:40:44 (5.52 MB/s) - '/home/buildroot/autobuild/run/instance-0/output/build/.linuxptp-2.0.tgz.07OIDy/output' saved [184942/184942]

linuxptp-2.0.tgz: OK (sha1: 592ca42c6146a79c1fcabed7c19fa7af4803d4f6)
linuxptp-2.0.tgz: OK (md5: d8bb7374943bb747db7786ac26f17f11)
linuxptp-2.0.tgz: OK (sha256: 0a24d9401e87d4af023d201e234d91127d82c350daad93432106284aa9459c7d)
>>> linuxptp 2.0 Extracting
gzip -d -c /home/buildroot/autobuild/run/instance-0/dl/linuxptp/linuxptp-2.0.tgz | tar --strip-components=1 -C /home/buildroot/autobuild/run/instance-0/output/build/linuxptp-2.0   -xf -
>>> linuxptp 2.0 Patching

Applying 0001-missing.h-drop-clock_nanosleep-replacement.patch using patch: 
patching file missing.h
>>> linuxptp 2.0 Configuring
>>> linuxptp 2.0 Building
PATH="/home/buildroot/autobuild/run/instance-0/output/host/bin:/home/buildroot/autobuild/run/instance-0/output/host/sbin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/snap/bin" CROSS_COMPILE="/home/buildroot/autobuild/run/instance-0/output/host/bin/aarch64-linux-gnu-" KBUILD_OUTPUT=/home/buildroot/autobuild/run/instance-0/output/host/aarch64-buildroot-linux-gnu/sysroot /usr/bin/make -j4 prefix=/usr EXTRA_CFLAGS="-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os  " EXTRA_LDFLAGS="" -C /home/buildroot/autobuild/run/instance-0/output/build/linuxptp-2.0 all
make[1]: Entering directory '/home/buildroot/autobuild/run/instance-0/output/build/linuxptp-2.0'
DEPEND sysoff.c
DEPEND timemaster.c
DEPEND pmc.c
DEPEND pmc_common.c
DEPEND phc_ctl.c
DEPEND phc2sys.c
DEPEND nsm.c
DEPEND hwstamp_ctl.c
DEPEND version.c
DEPEND util.c
DEPEND unicast_service.c
DEPEND unicast_fsm.c
DEPEND unicast_client.c
DEPEND uds.c
DEPEND udp6.c
DEPEND udp.c
DEPEND tsproc.c
DEPEND transport.c
DEPEND tlv.c
DEPEND telecom.c
DEPEND tc.c
DEPEND stats.c
DEPEND sk.c
DEPEND servo.c
DEPEND rtnl.c
DEPEND raw.c
DEPEND p2p_tc.c
DEPEND ptp4l.c
DEPEND print.c
DEPEND pqueue.c
DEPEND port_signaling.c
DEPEND port.c
DEPEND pi.c
DEPEND phc.c
DEPEND nullf.c
DEPEND ntpshm.c
DEPEND msg.c
DEPEND mmedian.c
DEPEND mave.c
DEPEND linreg.c
DEPEND hash.c
DEPEND fsm.c
DEPEND filter.c
DEPEND fault.c
DEPEND e2e_tc.c
DEPEND config.c
DEPEND clockcheck.c
DEPEND clockadj.c
DEPEND clock.c
DEPEND bmc.c
/home/buildroot/autobuild/run/instance-0/output/host/bin/aarch64-linux-gnu-gcc -Wall -DVER=2.0  -D_GNU_SOURCE -DHAVE_CLOCK_ADJTIME -DHAVE_POSIX_SPAWN -I/home/buildroot/autobuild/run/instance-0/output/host/aarch64-buildroot-linux-gnu/sysroot/usr/include -DHAVE_ONESTEP_SYNC  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os     -c -o ptp4l.o ptp4l.c
/home/buildroot/autobuild/run/instance-0/output/host/bin/aarch64-linux-gnu-gcc -Wall -DVER=2.0  -D_GNU_SOURCE -DHAVE_CLOCK_ADJTIME -DHAVE_POSIX_SPAWN -I/home/buildroot/autobuild/run/instance-0/output/host/aarch64-buildroot-linux-gnu/sysroot/usr/include -DHAVE_ONESTEP_SYNC  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os     -c -o bmc.o bmc.c
/home/buildroot/autobuild/run/instance-0/output/host/bin/aarch64-linux-gnu-gcc -Wall -DVER=2.0  -D_GNU_SOURCE -DHAVE_CLOCK_ADJTIME -DHAVE_POSIX_SPAWN -I/home/buildroot/autobuild/run/instance-0/output/host/aarch64-buildroot-linux-gnu/sysroot/usr/include -DHAVE_ONESTEP_SYNC  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os     -c -o clock.o clock.c
/home/buildroot/autobuild/run/instance-0/output/host/bin/aarch64-linux-gnu-gcc -Wall -DVER=2.0  -D_GNU_SOURCE -DHAVE_CLOCK_ADJTIME -DHAVE_POSIX_SPAWN -I/home/buildroot/autobuild/run/instance-0/output/host/aarch64-buildroot-linux-gnu/sysroot/usr/include -DHAVE_ONESTEP_SYNC  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os     -c -o clockadj.o clockadj.c
In file included from clock.c:20:
/home/buildroot/autobuild/run/instance-0/output/host/aarch64-buildroot-linux-gnu/sysroot/usr/include/linux/net_tstamp.h:158:2: error: unknown type name 'clockid_t'
  clockid_t clockid; /* reference clockid */
  ^~~~~~~~~
/home/buildroot/autobuild/run/instance-0/output/host/bin/aarch64-linux-gnu-gcc -Wall -DVER=2.0  -D_GNU_SOURCE -DHAVE_CLOCK_ADJTIME -DHAVE_POSIX_SPAWN -I/home/buildroot/autobuild/run/instance-0/output/host/aarch64-buildroot-linux-gnu/sysroot/usr/include -DHAVE_ONESTEP_SYNC  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os     -c -o clockcheck.o clockcheck.c
<builtin>: recipe for target 'clock.o' failed
make[1]: *** [clock.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: Leaving directory '/home/buildroot/autobuild/run/instance-0/output/build/linuxptp-2.0'
package/pkg-generic.mk:238: recipe for target '/home/buildroot/autobuild/run/instance-0/output/build/linuxptp-2.0/.stamp_built' failed
make: *** [/home/buildroot/autobuild/run/instance-0/output/build/linuxptp-2.0/.stamp_built] Error 2
make: Leaving directory '/home/buildroot/autobuild/run/instance-0/buildroot'