[GitHub] [incubator-nuttx] flavioipiranga commented on issue #5530: libxx "C++ Example using CMake" guide "No thread API" error

[GitBox <gi...@apache.org>]

flavioipiranga commented on issue #5530:
URL: https://github.com/apache/incubator-nuttx/issues/5530#issuecomment-1046021255


   I made some changes based at what you mentioned and the discussion at the link.
   
   First I added the #define __NuttX__ at the CMakeLists.txt here:
   `set(AC_DEFINES "${AC_DEFINES} -D__NuttX__ -DCONFIG_WCHAR_BUILTIN")`
   
   This solve the question about: error: #error "No thread API".
   
   After this I have an error about the lsupc++ lib. Looking at NuttX repository for this lib, I found out there is a config LIBSUPCXX to enable this lib.
   
   So I enabled this config using: 
   `make menuconfig`
   
   With this config enabled I ran:
   `./tools/configure.sh stm32f4discovery:testlibcxx`
   `make export`
   
   Following the steps mentioned at the example guide, new error appeared:
   `arm-none-eabi-objcopy: '/home/fiaj/nuttxspace/hellocpp/build/hellocpp.elf': No such file`
   
   I don't know why hellocpp.elf is generated inside src folder, but after copying from src to build folder I have the following result:
   
   ```
   [ 33%] Linking CXX executable hellocpp
   [100%] Built target hellocpp
   ```
   
   The final result at build folder:
   ```
   /nuttxspace/hellocpp/build$ ls
   CMakeCache.txt  CMakeFiles  cmake_install.cmake  hellocpp.bin  hellocpp.elf  Makefile  src
   
   ```


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