➜  example-mbedos-blinky git:(master) yt update
info: get versions for frdm-k64f-gcc
info: get versions for kinetis-k64-gcc
info: get versions for mbed-gcc
info: get versions for mbed-drivers
info: get versions for mbed-hal
info: get versions for cmsis-core
info: get versions for ualloc
info: get versions for minar
info: get versions for core-util
info: get versions for compiler-polyfill
info: get versions for greentea-client
info: get versions for mbed-hal-freescale
info: get versions for mbed-hal-ksdk-mcu
info: get versions for uvisor-lib
info: get versions for mbed-hal-k64f
info: get versions for cmsis-core-freescale
info: get versions for cmsis-core-k64f
info: get versions for mbed-hal-frdm-k64f
info: get versions for dlmalloc
info: get versions for minar-platform
info: get versions for minar-platform-mbed
➜  example-mbedos-blinky git:(master) yt clean
➜  example-mbedos-blinky git:(master) yt build
info: generate for target: frdm-k64f-gcc 2.0.0 at /home/rotor/mbed/example-mbedos-blinky/yotta_targets/frdm-k64f-gcc
-- The C compiler identification is GNU 5.3.0
-- The CXX compiler identification is GNU 5.3.0
-- Check for working C compiler using: Ninja
-- Check for working C compiler using: Ninja -- broken
CMake Error at /usr/share/cmake-3.5/Modules/CMakeTestCCompiler.cmake:61 (message):
  The C compiler "/usr/bin/arm-none-eabi-gcc" is not able to compile a simple
  test program.

  It fails with the following output:

   Change Dir: /home/rotor/mbed/example-mbedos-blinky/build/frdm-k64f-gcc/CMakeFiles/CMakeTmp



  Run Build Command:"/usr/bin/ninja" "cmTC_b171e"

  [1/2] Building C object CMakeFiles/cmTC_b171e.dir/testCCompiler.c.o

  [2/2] Linking C executable cmTC_b171e

  FAILED: : && /usr/bin/arm-none-eabi-gcc -fno-exceptions -fno-unwind-tables
  -Wl,--gc-sections -Wl,--sort-common -Wl,--sort-section=alignment
  -Wl,-wrap,main -Wl,-u,_printf_float -mcpu=cortex-m4 -mthumb
  -T"/home/rotor/mbed/example-mbedos-blinky/yotta_targets/kinetis-k64-gcc/CMake/../ld/K64FN1M0xxx12.ld"
  -Wl,-Map,cmTC_b171e.map -Wl,--start-group
  CMakeFiles/cmTC_b171e.dir/testCCompiler.c.o -lm -lc -lgcc -lm -lc -lgcc
  -Wl,--end-group --specs=nano.specs -o cmTC_b171e && :

  /usr/lib/gcc/arm-none-eabi/5.3.0/../../../../arm-none-eabi/bin/ld: warning:
  cannot find entry symbol Reset_Handler; defaulting to 0000000000000410


  /usr/lib/gcc/arm-none-eabi/5.3.0/../../../../arm-none-eabi/lib/armv7e-m/libc_nano.a(lib_a-sbrkr.o):
  In function `_sbrk_r':

  sbrkr.c:(.text._sbrk_r+0xc): undefined reference to `_sbrk'

  collect2: error: ld returned 1 exit status

  ninja: build stopped: subcommand failed.





  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:150 (project)


-- Configuring incomplete, errors occurred!
See also "/home/rotor/mbed/example-mbedos-blinky/build/frdm-k64f-gcc/CMakeFiles/CMakeOutput.log".
See also "/home/rotor/mbed/example-mbedos-blinky/build/frdm-k64f-gcc/CMakeFiles/CMakeError.log".
error: command ['cmake', '-D', 'CMAKE_BUILD_TYPE=RelWithDebInfo', '-G', 'Ninja', '.'] failed
➜  example-mbedos-blinky git:(master)