@jaredwolff Presumably that is the build directory in the C:\nfed\nrf9160-feather\samples\blinky directory?

Deleted that directory and build using west build -b circuitdojo_feather_nrf9160ns and I still get the same error.

 Assertion failed: The toolchain is unable to build a dummy C file.  See
  CMakeError.log.
Call Stack (most recent call first):
  C:/nfed/zephyr/CMakeLists.txt:42 (assert)

    mikcatta @jaredwolff Presumably that is the build directory in the C:\nfed\nrf9160-feather\samples\blinky directory?

    Yes, C:\nfed\nrf9160-feather\samples\blinky\build delete the whole build directory if that’s where you’re running west build -b circuitdojo_feather_nrf9160ns

    mikcatta hmm so this error happens when the cmake cache is mucked up for some reason. The solution for Mac is this. working on a Windows solution..

      mikcatta try this:

      Open up powershell.exe in Adminstrator mode and run:

      choco uninstall cmake
      choco install -y cmake --version 3.18.5

      Then delete your build directory and try again.

        Hi @jaredwolff

        Tried that, and cmake didn’t seem to be added to the PATH, so had to add it manually and now it reports as:

        C:\nfed\nrf9160-feather\samples\blinky>cmake -version
        cmake version 3.18.5

        But I still get the same error as before:-

        CMake Error at C:/nfed/zephyr/cmake/extensions.cmake:1457 (message):
          Assertion failed: The toolchain is unable to build a dummy C file.  See
          CMakeError.log.
        Call Stack (most recent call first):
          C:/nfed/zephyr/CMakeLists.txt:42 (assert)
        
        
        -- Configuring incomplete, errors occurred!
        See also "C:/nfed/nrf9160-feather/samples/blinky/build/CMakeFiles/CMakeOutput.log".
        See also "C:/nfed/nrf9160-feather/samples/blinky/build/CMakeFiles/CMakeError.log".
        FATAL ERROR: command exited with status 1: 'c:\program files\cmake\bin\cmake.EXE' '-BC:\nfed\nrf9160-feather\samples\blinky\build' '-SC:\nfed\nrf9160-feather\samples\blinky' -GNinja -DBOARD=circuitdojo_feather_nrf9160ns

          mikcatta where are you running these commands? powershell.exe? You don’t have any other cmake installations before using choco correct?

            I will add, what are you using to do your edits? I’m starting to see that my setup is not working in standalone powershell.exe but in the shell provided by VSCode. (as that’s how I did my testing)

              @jaredwolff

              I am running the commands from the Windows cmd prompt, is that OK?

              I’ve done a search for cmake.exe and found the following:-

              `C:>dir /s cmake.exe
              Volume in drive C is OS
              Volume Serial Number is 52E2-0FD2

              Directory of C:\Program Files\CMake\bin

              18/11/2020 07:21 8,964,752 cmake.exe
              1 File(s) 8,964,752 bytes

              Directory of C:\Users\mike_\ncs\v1.3.2\toolchain\opt\bin

              14/11/2020 17:21 7,792,128 cmake.exe
              1 File(s) 7,792,128 bytes

              Directory of C:\Users\mike_\ncs\v1.4.0\toolchain\opt\bin

              15/11/2020 11:57 7,792,128 cmake.exe`

              But they don’t appear in the PATH…

              C:\>echo %PATH%
              C:\Python39\Scripts\;C:\Python39\;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\app\mike_\product\11.2.0\odac;C:\app\mike_\product\11.2.0\odac\bin;C:\app\mike_\product\11.2.0\client_64bit_odac\bin;C:\app\mike_\product\11.2.0\client_64bit_odac;C:\Program Files (x86)\Intel\iCLS Client\;C:\ProgramData\Oracle\Java\javapath;C:\Program Files\Intel\iCLS Client\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program Files\TortoiseSVN\bin;C:\Program Files\Apache\maven\bin;C:\Program Files\Java\jdk1.8.0_161\bin;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;c:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Bin;C:\instantclient_11_1;C:\WINDOWS\System32\OpenSSH\;C:\Program Files (x86)\NTP\bin;c:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE\;c:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;c:\Program Files\Microsoft SQL Server\100\Tools\Binn\;c:\Program Files (x86)\Microsoft SQL Server\100\DTS\Binn\;c:\Program Files\Microsoft SQL Server\100\DTS\Binn\;C:\Program Files\nodejs\;C:\ProgramData\chocolatey\bin;C:\Program Files\Git\cmd;C:\nRFConnectSDK\bin;c:\program files\cmake\bin;C:\Program Files (x86)\GNU Tools Arm Embedded\9 2019-q4-major\bin;C:\Users\mike_\AppData\Local\Microsoft\WindowsApps;C:\ProgramData\mike_\atom\bin;C:\Users\mike_\AppData\Local\Microsoft\WindowsApps;C:\Users\mike_\AppData\Roaming\npm;C:\Users\mike_\AppData\Local\Programs\Microsoft VS Code\bin

                Directory of C:\nfed
                
                15/12/2020  19:48    <DIR>          .
                15/12/2020  19:48    <DIR>          ..
                15/12/2020  19:36    <DIR>          .west
                15/12/2020  19:45    <DIR>          bootloader
                15/12/2020  19:47    <DIR>          mbedtls
                15/12/2020  19:52    <DIR>          modules
                15/12/2020  19:37    <DIR>          nrf
                15/12/2020  19:36    <DIR>          nrf9160-feather
                15/12/2020  19:46    <DIR>          nrfxlib
                15/12/2020  19:46    <DIR>          test
                15/12/2020  19:52    <DIR>          tools
                15/12/2020  19:59    <DIR>          zephyr

                  mikcatta hmm looks ok. So you’re still getting the “Cannot compile dummy file” error on both Linux and Windows?

                  What’s the version of your compiler?

                    Evening @jaredwolff

                    I’ve got a bit further on Linux, but not quite to point of compiling !

                    Both Win & Ubuntu report:

                    - The C compiler identification is GNU 9.2.1
                    -- The CXX compiler identification is GNU 9.2.1
                    -- The ASM compiler identification is GNU

                    I believe I have a compile on Ubuntu !

                    Memory region         Used Size  Region Size  %age Used
                               FLASH:       12876 B     441856 B      2.91%
                                SRAM:        3904 B       128 KB      2.98%
                            IDT_LIST:          56 B         2 KB      2.73%
                    [158/158] Generating zephyr/merged_domains.hex

                    Had to follow these instructions on the Nordic site for the Python dependencies, which are ever so slightly different to the instructions on your site. [https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/gs_installing.html#installing-the-required-tools]

                    pip3 install –user -r zephyr/scripts/requirements.txt
                    pip3 install –user -r nrf/scripts/requirements.txt
                    pip3 install –user -r bootloader/mcuboot/scripts/requirements.txt

                    I am using CMake 3.18.5 on Ubuntu, but I am not sure that was the issue.

                    Hi @jaredwolff Just to clarify….

                    I have created a ~/.zephyrrc file which contains

                    export PATH=$PATH:/home/mike/cmake-3.18.5-Linux-x86_64/bin
                    export ZEPHYR_TOOLCHAIN_VARIANT=gnuarmemb
                    export GNUARMEMB_TOOLCHAIN_PATH="~/gnuarmemb"

                    I installed cmake-3.18.5 from source, so it installed it locally. Again not sure, that was the issue. The GNUARMEMB was installed into the directory ~/gnuarmemb

                    On first compile, I had to add the “-p” command, so ran west build -b circuitdojo_feather_nrf9160ns -p

                    Some of these steps may not be necessary, but it seems to compile a hex file now at least on Ubuntu. Next step will be to see if I can flash it from the VM or maybe in needs to be transferred to Windows for programming the board, but that’s tomorrow little game.

                    Got it. I’m looking into utilizing the nRF Desktop SDK Manager. Since you have those already installed, it would make the most sense to use them. Stay tuned..

                      HI @jaredwolff

                      Apologises, I thought I’d have a go at compiling one of the main apps for the Feather at https://docs.jaredwolff.com/nrf9160-agps-sample.html

                      From the /home/mike/nfed/nrf/samples/nrf9160/nrf_cloud_agps, I’ve added the additional lines to the prj.conf, but when I try and compile it says:-

                      **/home/mike/nfed/nrf/samples/nrf9160/nrf_cloud_agps/prj.conf:61: warning: attempt to assign the value '"feather-"' to the undefined symbol NRF_CLOUD_CLIENT_ID_PREFIX**
                      Parsing /home/mike/nfed/nrf/samples/nrf9160/nrf_cloud_agps/Kconfig
                      Loaded configuration '/home/mike/nfed/zephyr/boards/arm/circuitdojo_feather_nrf9160/circuitdojo_feather_nrf9160ns_defconfig'
                      Merged configuration '/home/mike/nfed/nrf/samples/nrf9160/nrf_cloud_agps/prj.conf'
                      
                      error: Aborting due to Kconfig warnings
                      
                      CMake Error at /home/mike/nfed/zephyr/cmake/kconfig.cmake:217 (message):
                        command failed with return code: 1
                      Call Stack (most recent call first):
                        /home/mike/nfed/zephyr/cmake/app/boilerplate.cmake:506 (include)
                        /home/mike/nfed/zephyr/share/zephyr-package/cmake/ZephyrConfig.cmake:24 (include)
                        /home/mike/nfed/zephyr/share/zephyr-package/cmake/ZephyrConfig.cmake:35 (include_boilerplate)
                        CMakeLists.txt:9 (find_package)
                      
                      
                      -- Configuring incomplete, errors occurred!
                      FATAL ERROR: command exited with status 1: /home/mike/cmake-3.18.5-Linux-x86_64/bin/cmake -B/home/mike/nfed/nrf/samples/nrf9160/nrf_cloud_agps/build -S/home/mike/nfed/nrf/samples/nrf9160/nrf_cloud_agps -GNinja -DBOARD=circuitdojo_feather_nrf9160ns

                      Without that line, it compiles just fine. What I am doing wrong here please?

                        mikcatta this example only works on newer versions of the nRF Connect SDK. What version are you using?

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