# Building error **URL:** \ **Category:** PX4 Autopilot\ **Created:** [September 17, 2020, 6:48pm UTC](https://discuss.px4.io/t/building-error/18630 "2020-09-17T18:48:11Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![OzanDurmaz](https://discuss.px4.io/user_avatar/discuss.px4.io/ozandurmaz/32/6225_2.png) [@OzanDurmaz](https://discuss.px4.io/u/OzanDurmaz)\ **Post date:** [September 17, 2020, 6:48pm UTC](https://discuss.px4.io/t/building-error/18630/1 "2020-09-17T18:48:11Z")
Hi, Trying to build the latest update on windows. Followed the instructions, installed Windows Cygwin Toolchain with github. When I try building the code for my cube black using “make px4\_fmu-v3\_default” I get the following screen massage: ozand@DESKTOP-EV81A2B ~ $ cd firmware ozand@DESKTOP-EV81A2B ~/firmware $ make clean ozand@DESKTOP-EV81A2B ~/firmware $ make px4\_fmu-v3\_default – PX4 version: v1.11.0-rc3-343-gc5f479dac7 – PX4 config file: /cygdrive/c/PX4/home/firmware/boards/px4/fmu-v3/default.cmake – PX4 config: px4\_fmu-v3\_default – PX4 platform: nuttx – cmake build type: MinSizeRel – The CXX compiler identification is GNU 7.3.1 – The C compiler identification is GNU 7.3.1 – The ASM compiler identification is GNU – Found assembler: /cygdrive/c/PX4/toolchain/gcc-arm/bin/arm-none-eabi-gcc.exe – Check for working CXX compiler: /cygdrive/c/PX4/toolchain/gcc-arm/bin/arm-none-eabi-g++.exe – Check for working CXX compiler: /cygdrive/c/PX4/toolchain/gcc-arm/bin/arm-none-eabi-g++.exe – works – Detecting CXX compiler ABI info – Detecting CXX compiler ABI info - failed – Detecting CXX compile features – Detecting CXX compile features - failed – Check for working C compiler: /cygdrive/c/PX4/toolchain/gcc-arm/bin/arm-none-eabi-gcc.exe – Check for working C compiler: /cygdrive/c/PX4/toolchain/gcc-arm/bin/arm-none-eabi-gcc.exe – works – Detecting C compiler ABI info – Detecting C compiler ABI info - failed – Detecting C compile features – Detecting C compile features - failed – Found PythonInterp: /usr/bin/python3 (found suitable version “3.6.9”, minimum required is “3”) – build type is MinSizeRel – PX4 ECL: Very lightweight Estimation & Control Library v1.9.0-rc1-446-gfab242a – Building and including px4\_io-v2\_default – Found PythonInterp: /usr/bin/python3 (found version “3.6.9”) – Using C++11 – Release build type: MinSizeRel – ROMFS: px4fmu\_common – ROMFS: Adding rc.board\_defaults – ROMFS: Adding rc.board\_sensors – ROMFS: Adding rc.board\_mavlink – Found SVD: – Configuring done – Generating done – Build files have been written to: /cygdrive/c/PX4/home/firmware/build/px4\_fmu-v3\_default [0/1354] git submodule platforms/nuttx/NuttX/nuttx [7/1354] git submodule platforms/nuttx/NuttX/apps [10/1354] git submodule src/lib/ecl [16/1354] git submodule mavlink/include/mavlink/v2.0 [18/1354] git submodule src/drivers/gps/devices [19/1354] git submodule src/drivers/uavcan/libuavcan [35/1354] Generating nuttx/binfmt/libbinfmt.a FAILED: NuttX/nuttx/binfmt/libbinfmt.a cd /cygdrive/c/PX4/home/firmware/build/px4\_fmu-v3\_default/NuttX/nuttx && find binfmt -type f -name \*.o -delete && make -C binfmt --quiet --no-print-directory all TOPDIR=/cygdrive/c/PX4/home/firmware/build/px4\_fmu-v3\_default/NuttX/nuttx KERNEL=y EXTRAFLAGS=-D\_\_KERNEL\_\_ binfmt\_globals.c:40:10: fatal error: nuttx/config.h: No such file or directory #include \ ^ ~~~~~~~~~~~~~~~ compilation terminated. make[1]: \*\*\* [Makefile:79: binfmt\_globals.o] Error 1 [36/1354] Generating nuttx/libs/libxx/libxx.a FAILED: NuttX/nuttx/libs/libxx/libxx.a cd /cygdrive/c/PX4/home/firmware/build/px4\_fmu-v3\_default/NuttX/nuttx && find libs/libxx -type f -name \*.o -delete && make -C libs/libxx --quiet --no-print-directory all TOPDIR=/cygdrive/c/PX4/home/firmware/build/px4\_fmu-v3\_default/NuttX/nuttx KERNEL=n EXTRAFLAGS= libxx\_cxa\_atexit.cxx:40:10: fatal error: nuttx/config.h: No such file or directory #include \ ^ ~~~~~~~~~~~~~~~ compilation terminated. make[1]: \*\*\* [Makefile:84: libxx\_cxa\_atexit.o] Error 1 [38/1354] Generating nuttx/sched/libsched.a FAILED: NuttX/nuttx/sched/libsched.a cd /cygdrive/c/PX4/home/firmware/build/px4\_fmu-v3\_default/NuttX/nuttx && find sched -type f -name \*.o -delete && make -C sched --quiet --no-print-directory all TOPDIR=/cygdrive/c/PX4/home/firmware/build/px4\_fmu-v3\_default/NuttX/nuttx KERNEL=y EXTRAFLAGS=-D\_\_KERNEL\_\_ clock/clock\_initialize.c:41:10: fatal error: nuttx/config.h: No such file or directory #include \ ^ ~~~~~~~~~~~~~~~ compilation terminated. make[1]: \*\*\* [Makefile:57: clock\_initialize.o] Error 1 [39/1354] Generating nuttx/mm/libmm.a FAILED: NuttX/nuttx/mm/libmm.a cd /cygdrive/c/PX4/home/firmware/build/px4\_fmu-v3\_default/NuttX/nuttx && find mm -type f -name \*.o -delete && make -C mm --quiet --no-print-directory all TOPDIR=/cygdrive/c/PX4/home/firmware/build/px4\_fmu-v3\_default/NuttX/nuttx KERNEL=n EXTRAFLAGS= mm\_heap/mm\_initialize.c:25:10: fatal error: nuttx/config.h: No such file or directory #include \ ^ ~~~~~~~~~~~~~~~ compilation terminated. make[1]: \*\*\* [Makefile:67: bin/mm\_initialize.o] Error 1 [40/1354] Generating nuttx/fs/libfs.a FAILED: NuttX/nuttx/fs/libfs.a cd /cygdrive/c/PX4/home/firmware/build/px4\_fmu-v3\_default/NuttX/nuttx && find fs -type f -name \*.o -delete && make -C fs --quiet --no-print-directory all TOPDIR=/cygdrive/c/PX4/home/firmware/build/px4\_fmu-v3\_default/NuttX/nuttx KERNEL=y EXTRAFLAGS=-D\_\_KERNEL\_\_ fs\_initialize.c:40:10: fatal error: nuttx/config.h: No such file or directory #include \ ^ ~~~~~~~~~~~~~~~ compilation terminated. make[1]: \*\*\* [Makefile:94: fs\_initialize.o] Error 1 [41/1354] Generating nuttx/boards/libboards.a FAILED: NuttX/nuttx/boards/libboards.a cd /cygdrive/c/PX4/home/firmware/build/px4\_fmu-v3\_default/NuttX/nuttx && find boards -type f -name \*.o -delete && make -C boards --quiet --no-print-directory all TOPDIR=/cygdrive/c/PX4/home/firmware/build/px4\_fmu-v3\_default/NuttX/nuttx KERNEL=y EXTRAFLAGS=-D\_\_KERNEL\_\_ boardctl.c:25:10: fatal error: nuttx/config.h: No such file or directory #include \ ^ ~~~~~~~~~~~~~~~ compilation terminated. make[1]: \*\*\* [Makefile:94: boardctl.o] Error 1 [42/1354] Generating nuttx/libs/libc/libc.a FAILED: NuttX/nuttx/libs/libc/libc.a cd /cygdrive/c/PX4/home/firmware/build/px4\_fmu-v3\_default/NuttX/nuttx && find libs/libc -type f -name \*.o -delete && make -C libs/libc --quiet --no-print-directory all TOPDIR=/cygdrive/c/PX4/home/firmware/build/px4\_fmu-v3\_default/NuttX/nuttx KERNEL=n EXTRAFLAGS= assert/lib\_assert.c:25:10: fatal error: nuttx/arch.h: No such file or directory #include \ ^ ~~~~~~~~~~~~~ compilation terminated. make[1]: \*\*\* [Makefile:132: bin/lib\_assert.o] Error 1 [43/1354] Generating nuttx/drivers/libdrivers.a FAILED: NuttX/nuttx/drivers/libdrivers.a cd /cygdrive/c/PX4/home/firmware/build/px4\_fmu-v3\_default/NuttX/nuttx && find drivers -type f -name \*.o -delete && make -C drivers --quiet --no-print-directory all TOPDIR=/cygdrive/c/PX4/home/firmware/build/px4\_fmu-v3\_default/NuttX/nuttx KERNEL=y EXTRAFLAGS=-D\_\_KERNEL\_\_ bch/bchlib\_setup.c:40:10: fatal error: nuttx/config.h: No such file or directory #include \ ^ ~~~~~~~~~~~~~~~ compilation terminated. make[1]: \*\*\* [Makefile:117: bchlib\_setup.o] Error 1 [44/1354] Performing configure step for ‘px4io\_firmware’ – PX4 version: v1.11.0-rc3-343-gc5f479dac7 – PX4 config file: /cygdrive/c/PX4/home/firmware/boards/px4/io-v2/default.cmake – PX4 config: px4\_io-v2\_default – PX4 platform: nuttx – cmake build type: MinSizeRel – The CXX compiler identification is GNU 7.3.1 – The C compiler identification is GNU 7.3.1 – The ASM compiler identification is GNU – Found assembler: /cygdrive/c/PX4/toolchain/gcc-arm/bin/arm-none-eabi-gcc.exe – Check for working CXX compiler: /cygdrive/c/PX4/toolchain/gcc-arm/bin/arm-none-eabi-g++.exe – Check for working CXX compiler: /cygdrive/c/PX4/toolchain/gcc-arm/bin/arm-none-eabi-g++.exe – works – Detecting CXX compiler ABI info – Detecting CXX compiler ABI info - failed – Detecting CXX compile features – Detecting CXX compile features - failed – Check for working C compiler: /cygdrive/c/PX4/toolchain/gcc-arm/bin/arm-none-eabi-gcc.exe – Check for working C compiler: /cygdrive/c/PX4/toolchain/gcc-arm/bin/arm-none-eabi-gcc.exe – works – Detecting C compiler ABI info – Detecting C compiler ABI info - failed – Detecting C compile features – Detecting C compile features - failed – Found PythonInterp: /usr/bin/python3 (found suitable version “3.6.9”, minimum required is “3”) – build type is MinSizeRel – PX4 ECL: Very lightweight Estimation & Control Library v1.9.0-rc1-446-gfab242a – Configuring done – Generating done – Build files have been written to: /cygdrive/c/PX4/home/firmware/build/px4\_fmu-v3\_default/external/Build/px4io\_firmware ninja: build stopped: subcommand failed. make: \*\*\* [Makefile:219: px4\_fmu-v3\_default] Error 1 ozand@DESKTOP-EV81A2B ~/firmware $ Can someone help? ---
**Author:** ![jimdgit](https://discuss.px4.io/user_avatar/discuss.px4.io/jimdgit/32/6860_2.png) [@jimdgit](https://discuss.px4.io/u/jimdgit)\ **Post date:** [September 17, 2020, 9:41pm UTC](https://discuss.px4.io/t/building-error/18630/2 "2020-09-17T21:41:18Z")
I would say your include paths are not correct. I am not familiar with the windows build, so you will need to look into that. What branch are you on? ---
**Author:** ![OzanDurmaz](https://discuss.px4.io/user_avatar/discuss.px4.io/ozandurmaz/32/6225_2.png) [@OzanDurmaz](https://discuss.px4.io/u/OzanDurmaz)\ **Post date:** [September 18, 2020, 9:40am UTC](https://discuss.px4.io/t/building-error/18630/3 "2020-09-18T09:40:27Z")
Hi, thanks for reply. What do you mean by branch? Edit: I’m trying to build latest px4 release. I would like to build it cos I added a custom airframe ---
**Author:** ![jimdgit](https://discuss.px4.io/user_avatar/discuss.px4.io/jimdgit/32/6860_2.png) [@jimdgit](https://discuss.px4.io/u/jimdgit)\ **Post date:** [September 18, 2020, 4:19pm UTC](https://discuss.px4.io/t/building-error/18630/4 "2020-09-18T16:19:39Z")
If you don’t know what branch you are on the you are on ‘master’. From the Firmware directory if you type ‘git branch’ it should say master. A branch is basically a version. For example ‘release/1.11’ is the branch for the latest release. So if you wanted to use this branch you could type: ‘git checkout release/1.11’ and then you would be on this version. If it was me I would use this release branch as the code is release tested and in the wild. It wouldn’t hurt to learn a bit about git. As for your build problem you might get a better answer if you join the PX4 slack and ask on the ‘getting-started’ channel. .