This is an example to compile conan packages using the nuttx generated toolchain. In this example we have create an example that consumes the Eigen3 package which is installed via conan. The board used for this example is xmc4800-relax. Note I tested the code on the board and executes correctly.
cp defconfig <NUTTX_FOLDER>/boards/arm/xmc4/xmc4800-relax/configs/nsh/defconfig
cd <NUTTX_FOLDER>
./tools/configure.sh -E -l xmc4800-relax:nsh
make export
mkdir build
cd build
mkdir nuttx
tar -xf <NUTTX_FOLDER>/<NUTTX_ARCHIVE> -C nuttx --strip-component=1
conan install ../conan/conanfile.txt -of=./ -pr ../conan/profile.txt -pr:b ../conan/profile.txt --build=missing -s build_type=Release
cmake .. -DCMAKE_BUILD_TYPE=Release
make
And there you have it you have successfully built an exec that consumes a conan package with nuttx.