I’m working on integrating NuttX into an existing C++ project, but I’m facing several issues.
Background Initially, I tried using symbolic links to connect my application to NuttX apps/external and build everything with CMake. However, since NuttX does not fully support CMake, I changed my approach: My application’s CMake script now executes NuttX’s configure, make, and make export steps. After that, my application links against the NuttX libraries that were built. The Problem I need to use libc and libstdc++ from my ARM toolchain because I require C++23 features. I have already modified the relevant menuconfig settings, but I’m encountering these issues: Conflicting declarations – Some symbols are coming from the toolchain libraries, while others are being pulled in from NuttX, resulting in multiple definition errors. Unsupported relocations – If I disable NuttX’s libc and libstdc++, I get errors like: "... dangerous relocation: unsupported relocation ..." I’m unsure how to cleanly integrate NuttX with a standalone C++ application while still using the toolchain’s standard libc and libstdc++ (instead of NuttX’s minimal libc). What I’ve Tried I looked at this example: https://nuttx.apache.org/docs/latest/guides/cpp_cmake.html However, when I modify it to use C++23 and enable C++23 features, I still encounter the same problems. I also want to avoid the PX4 firmware approach, where they compile NuttX from their CMake file into libraries and then link to them. While this might solve the issue, I’m looking for a simpler approach. Question What is the recommended way to: Build NuttX while using the ARM toolchain’s standard libc and libstdc++? Integrate NuttX into a standalone CMake-based C++23 project without symbol conflicts?
