I tried to compile simple app from NuttX with standard library from toolchain and I'm getting this errors: arm-none-eabi/include/stdlib.h:39:3: error: conflicting declaration 'typedef struct div_t div_t' 39 | } div_t; | ^~~~~ Because it sees definitions from NuttX and toolchain library, I'm using latest ARM toolchain 14.3.
pt., 25 lip 2025 o 14:36 Bartek22 <bartol2...@gmail.com> napisał(a): > 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? >
