CC      util-linux/mount.o
  CC      coreutils/true.o
  CC      coreutils/tty.o
  CC      libbb/loop.o
  CC      libbb/make_directory.o
  CC      libbb/makedev.o
  CC      util-linux/pivot_root.o
  CC      coreutils/uname.o
  CC      libbb/match_fstype.o
  CC      libbb/messages.o
  CC      coreutils/uniq.o
  CC      libbb/mode_string.o
  CC      libbb/obscure.o
  CC      libbb/parse_config.o
  CC      coreutils/usleep.o
  CC      libbb/parse_mode.o
  CC      libbb/percent_decode.o
  CC      coreutils/uudecode.o
  CC      coreutils/uuencode.o
  CC      libbb/perror_msg.o
  CC      coreutils/wc.o
  CC      coreutils/who.o
  CC      util-linux/rdate.o
  CC      libbb/perror_nomsg.o
  CC      libbb/perror_nomsg_and_die.o
  CC      libbb/pidfile.o
  CC      coreutils/whoami.o
  CC      util-linux/readprofile.o
  CC      util-linux/setarch.o
  CC      util-linux/swaponoff.o
  CC      libbb/platform.o
  CC      coreutils/yes.o
  CC      libbb/print_flags.o
  CC      libbb/printable.o
  CC      util-linux/switch_root.o
  CC      libbb/printable_string.o
  CC      util-linux/umount.o
  CC      libbb/process_escape_sequence.o
  CC      libbb/procps.o
  AR      coreutils/lib.a
  CC      libbb/progress.o
  CC      libbb/ptr_to_globals.o
  CC      libbb/read.o
  CC      libbb/pw_encrypt.o
  CC      libbb/read_key.o
  CC      libbb/read_printf.o
  CC      libbb/recursive_action.o
  CC      libbb/remove_file.o
  CC      libbb/rtc.o
  CC      libbb/run_shell.o
  AR      util-linux/lib.a
  CC      libbb/safe_gethostname.o
  CC      libbb/safe_poll.o
  CC      libbb/safe_strncpy.o
  CC      libbb/safe_write.o
  CC      libbb/setup_environment.o
  CC      libbb/signals.o
  CC      libbb/simplify_path.o
  CC      libbb/single_argv.o
  CC      libbb/skip_whitespace.o
  CC      libbb/speed_table.o
  CC      libbb/str_tolower.o
  CC      libbb/strrstr.o
  CC      libbb/time.o
  CC      libbb/trim.o
  CC      libbb/u_signal_names.o
  CC      libbb/udp_io.o
  CC      libbb/update_passwd.o
  CC      libbb/utmp.o
  CC      libbb/uuencode.o
  CC      libbb/vdprintf.o
  CC      libbb/verror_msg.o
  CC      libbb/vfork_daemon_rexec.o
  CC      libbb/warn_ignoring_args.o
  CC      libbb/wfopen.o
  CC      libbb/wfopen_input.o
  CC      libbb/write.o
  CC      libbb/xatonum.o
  CC      libbb/xconnect.o
  CC      libbb/xfunc_die.o
  CC      libbb/xfuncs.o
  CC      libbb/xfuncs_printf.o
  CC      libbb/xgetcwd.o
  CC      libbb/xgethostbyname.o
  CC      libbb/xreadlink.o
  CC      libbb/xrealloc_vector.o
  CC      libbb/xregcomp.o
  AR      libbb/lib.a
  AR      shell/lib.a
  LINK    busybox_unstripped
Trying libraries: m
Failed: -Wl,--start-group -lm -Wl,--end-group
Output of:
/home/test/test/output/host/usr/bin/mips64el-unknown-linux-gnu-gcc -pipe -Os -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -I/home/test/test/output/toolchain/linux/include -Wall -Wshadow -Wwrite-strings -Wundef -Wstrict-prototypes -Wunused -Wunused-parameter -Wunused-function -Wunused-value -Wmissing-prototypes -Wmissing-declarations -Wdeclaration-after-statement -Wold-style-definition -fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer -ffunction-sections -fdata-sections -fno-guess-branch-probability -funsigned-char -static-libgcc -falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1 -Os -o busybox_unstripped -Wl,--start-group applets/built-in.o archival/lib.a archival/libarchive/lib.a console-tools/lib.a coreutils/lib.a coreutils/libcoreutils/lib.a debianutils/lib.a e2fsprogs/lib.a editors/lib.a findutils/lib.a init/lib.a libbb/lib.a libpwdgrp/lib.a loginutils/lib.a mailutils/lib.a miscutils/lib.a modutils/lib.a networking/lib.a networking/libiproute/lib.a networking/udhcp/lib.a printutils/lib.a procps/lib.a runit/lib.a selinux/lib.a shell/lib.a sysklogd/lib.a util-linux/lib.a util-linux/volume_id/lib.a archival/built-in.o archival/libarchive/built-in.o console-tools/built-in.o coreutils/built-in.o coreutils/libcoreutils/built-in.o debianutils/built-in.o e2fsprogs/built-in.o editors/built-in.o findutils/built-in.o init/built-in.o libbb/built-in.o libpwdgrp/built-in.o loginutils/built-in.o mailutils/built-in.o miscutils/built-in.o modutils/built-in.o networking/built-in.o networking/libiproute/built-in.o networking/udhcp/built-in.o printutils/built-in.o procps/built-in.o runit/built-in.o selinux/built-in.o shell/built-in.o sysklogd/built-in.o util-linux/built-in.o util-linux/volume_id/built-in.o -Wl,--end-group -Wl,--start-group -lm -Wl,--end-group
==========
/home/test/test/output/host/usr/mipsel-unknown-linux-gnu/sysroot/usr/lib/../lib/libm.so: could not read symbols: File in wrong format
collect2: ld returned 1 exit status
make[1]: *** [busybox_unstripped] Error 1
make[1]: Leaving directory `/home/test/test/output/build/busybox-1.20.2'
make: *** [/home/test/test/output/build/busybox-1.20.2/.stamp_built] Error 2