+ curl -f --connect-timeout 20 --retry 5 --location https://codeload.github.com/wangyu-/UDPspeeder/tar.gz/20210116.0?/UDPspeeder-20210116.0.tar.gz
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100 13154    0 13154    0     0  21113      0 --:--:-- --:--:-- --:--:-- 21080
100 4343k    0 4343k    0     0  3854k      0 --:--:--  0:00:01 --:--:-- 3854k
make[3]: Entering directory '/mnt/disk/openwrt-21.02/build_dir/target-arc_arc700_glibc/UDPspeeder-20210116.0'
arc-openwrt-linux-gnu-g++   -o speederv2_cross    -I. main.cpp log.cpp common.cpp lib/fec.cpp lib/rs.cpp packet.cpp delay_manager.cpp fd_manager.cpp connection.cpp fec_manager.cpp misc.cpp tunnel_client.cpp tunnel_server.cpp my_ev.cpp -isystem libev  -std=c++11   -Wall -Wextra -Wno-unused-variable -Wno-unused-parameter -Wno-missing-field-initializers  -lrt -O2
main.cpp: In function 'void print_help()':
main.cpp:20:9: warning: 'char* strncpy(char*, const char*, size_t)' output truncated before terminating nul copying 10 bytes from a string of the same length [-Wstringop-truncation]
  strncpy(git_version_buf,gitversion,10);
  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/mnt/disk/openwrt-21.02/staging_dir/toolchain-arc_arc700_gcc-8.4.0_glibc/lib/gcc/arc-openwrt-linux-gnu/8.4.0/../../../../arc-openwrt-linux-gnu/bin/ld: /mnt/disk/openwrt-21.02/tmp/cchvop3l.o: in function `std::string::_Rep::_M_dispose(std::allocator<char> const&) [clone .part.2]':
common.cpp:(.text+0x1c): undefined reference to `__atomic_fetch_add_4'
/mnt/disk/openwrt-21.02/staging_dir/toolchain-arc_arc700_gcc-8.4.0_glibc/lib/gcc/arc-openwrt-linux-gnu/8.4.0/../../../../arc-openwrt-linux-gnu/bin/ld: common.cpp:(.text+0x1c): undefined reference to `__atomic_fetch_add_4'
/mnt/disk/openwrt-21.02/staging_dir/toolchain-arc_arc700_gcc-8.4.0_glibc/lib/gcc/arc-openwrt-linux-gnu/8.4.0/../../../../arc-openwrt-linux-gnu/bin/ld: /mnt/disk/openwrt-21.02/tmp/cchvop3l.o: in function `string_to_vec(char const*, char const*)':
common.cpp:(.text+0x1190): undefined reference to `__atomic_fetch_add_4'
/mnt/disk/openwrt-21.02/staging_dir/toolchain-arc_arc700_gcc-8.4.0_glibc/lib/gcc/arc-openwrt-linux-gnu/8.4.0/../../../../arc-openwrt-linux-gnu/bin/ld: common.cpp:(.text+0x1190): undefined reference to `__atomic_fetch_add_4'
/mnt/disk/openwrt-21.02/staging_dir/toolchain-arc_arc700_gcc-8.4.0_glibc/lib/gcc/arc-openwrt-linux-gnu/8.4.0/../../../../arc-openwrt-linux-gnu/bin/ld: common.cpp:(.text+0x11fe): undefined reference to `__atomic_fetch_add_4'
/mnt/disk/openwrt-21.02/staging_dir/toolchain-arc_arc700_gcc-8.4.0_glibc/lib/gcc/arc-openwrt-linux-gnu/8.4.0/../../../../arc-openwrt-linux-gnu/bin/ld: /mnt/disk/openwrt-21.02/tmp/cchvop3l.o:common.cpp:(.text+0x11fe): more undefined references to `__atomic_fetch_add_4' follow
collect2: error: ld returned 1 exit status
make[3]: *** [makefile:54: cross] Error 1
make[3]: Leaving directory '/mnt/disk/openwrt-21.02/build_dir/target-arc_arc700_glibc/UDPspeeder-20210116.0'
make[2]: *** [Makefile:64: /mnt/disk/openwrt-21.02/build_dir/target-arc_arc700_glibc/UDPspeeder-20210116.0/.built] Error 2
time: package/feeds/packages/udpspeeder/compile#8.19#1.00#11.54