touch /home/ubuntu/openwrt/openwrt/build_dir/target-arc_archs_glibc/ustp-2021-08-25-9622264c/.built_check
MAKEFLAGS="" /home/ubuntu/openwrt/openwrt/staging_dir/host/bin/ninja  -j1 -C /home/ubuntu/openwrt/openwrt/build_dir/target-arc_archs_glibc/ustp-2021-08-25-9622264c
ninja: Entering directory `/home/ubuntu/openwrt/openwrt/build_dir/target-arc_archs_glibc/ustp-2021-08-25-9622264c'
[1/1] Linking C executable ustpd
FAILED: ustpd
: && /home/ubuntu/openwrt/openwrt/staging_dir/toolchain-arc_archs_gcc-11.2.0_glibc/bin/arc-openwrt-linux-gnu-gcc -Os -pipe -matomic -mcpu=archs -fno-caller-saves -fhonour-copts -Wno-error=unused-but-set-variable -Wno-error=unused-result -fmacro-prefix-map=/home/ubuntu/openwrt/openwrt/build_dir/target-arc_archs_glibc/ustp-2021-08-25-9622264c=ustp-2021-08-25-9622264c -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro -I/home/ubuntu/openwrt/openwrt/staging_dir/target-arc_archs_glibc/usr/include -flto -DNDEBUG -L/home/ubuntu/openwrt/openwrt/staging_dir/toolchain-arc_archs_gcc-11.2.0_glibc/usr/lib -L/home/ubuntu/openwrt/openwrt/staging_dir/toolchain-arc_archs_gcc-11.2.0_glibc/lib -znow -zrelro -flto -fuse-linker-plugin CMakeFiles/ustpd.dir/bridge_track.c.o CMakeFiles/ustpd.dir/brmon.c.o CMakeFiles/ustpd.dir/hmac_md5.c.o CMakeFiles/ustpd.dir/libnetlink.c.o CMakeFiles/ustpd.dir/mstp.c.o CMakeFiles/ustpd.dir/netif_utils.c.o CMakeFiles/ustpd.dir/packet.c.o CMakeFiles/ustpd.dir/worker.c.o CMakeFiles/ustpd.dir/config.c.o CMakeFiles/ustpd.dir/main.c.o CMakeFiles/ustpd.dir/ubus.c.o -o ustpd  -lubox  -lubus && :
/home/ubuntu/openwrt/openwrt/staging_dir/toolchain-arc_archs_gcc-11.2.0_glibc/lib/gcc/arc-openwrt-linux-gnu/11.2.0/../../../../arc-openwrt-linux-gnu/bin/ld: /home/ubuntu/openwrt/openwrt/tmp/ccaCaoti.ltrans0.ltrans.o: in function `main':
/home/ubuntu/openwrt/openwrt/build_dir/target-arc_archs_glibc/ustp-2021-08-25-9622264c/worker.c:110: undefined reference to `pthread_create'
/home/ubuntu/openwrt/openwrt/staging_dir/toolchain-arc_archs_gcc-11.2.0_glibc/lib/gcc/arc-openwrt-linux-gnu/11.2.0/../../../../arc-openwrt-linux-gnu/bin/ld: /home/ubuntu/openwrt/openwrt/tmp/ccaCaoti.ltrans0.ltrans.o:/home/ubuntu/openwrt/openwrt/build_dir/target-arc_archs_glibc/ustp-2021-08-25-9622264c/worker.c:110: undefined reference to `pthread_create'
/home/ubuntu/openwrt/openwrt/staging_dir/toolchain-arc_archs_gcc-11.2.0_glibc/lib/gcc/arc-openwrt-linux-gnu/11.2.0/../../../../arc-openwrt-linux-gnu/bin/ld: /home/ubuntu/openwrt/openwrt/tmp/ccaCaoti.ltrans0.ltrans.o: in function `main':
/home/ubuntu/openwrt/openwrt/build_dir/target-arc_archs_glibc/ustp-2021-08-25-9622264c/worker.c:120: undefined reference to `pthread_join'
/home/ubuntu/openwrt/openwrt/staging_dir/toolchain-arc_archs_gcc-11.2.0_glibc/lib/gcc/arc-openwrt-linux-gnu/11.2.0/../../../../arc-openwrt-linux-gnu/bin/ld: /home/ubuntu/openwrt/openwrt/tmp/ccaCaoti.ltrans0.ltrans.o:/home/ubuntu/openwrt/openwrt/build_dir/target-arc_archs_glibc/ustp-2021-08-25-9622264c/worker.c:120: undefined reference to `pthread_join'
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.
make[3]: *** [Makefile:44: /home/ubuntu/openwrt/openwrt/build_dir/target-arc_archs_glibc/ustp-2021-08-25-9622264c/.built] Error 1
make[3]: Leaving directory '/home/ubuntu/openwrt/openwrt/package/network/services/ustp'
time: package/network/services/ustp/compile#1.26#0.33#1.48
    ERROR: package/network/services/ustp failed to build.
make[2]: *** [package/Makefile:116: package/network/services/ustp/compile] Error 1
make[2]: Leaving directory '/home/ubuntu/openwrt/openwrt'
make[1]: *** [package/Makefile:110: /home/ubuntu/openwrt/openwrt/staging_dir/target-arc_archs_glibc/stamp/.package_compile] Error 2
make[1]: Leaving directory '/home/ubuntu/openwrt/openwrt'
make: *** [/home/ubuntu/openwrt/openwrt/include/toplevel.mk:230: world] Error 2