I was using newlib. It is bundled with ARM GCC toolchain, at least on Ubuntu and Arch. Worked out of the box, except I remember having minor build issues from time to time, when adding additional headers. This question was appearing here in the past. I am also not sure what is the official answer.
If I remember correctly many libraries work, but none of them is supported by NuttX. By not supported, I mean people are still trying to help with issues, but there is no official recommendation nor guarantee. C++ STL implementations are big projects, constantly changing and toolchains are not always sane in terms which headers they are trying to use. For example they may take a bit of NuttX libc, and mix it with a bit of its own headers. Then feed it to C++ STL giving unpredictable result in the end. I am not sure if anything that I am writing above makes sense :D In practice newlib was working, but probably not good for critical applications. I would also be happy to hear what is the official statement on it now. By the way, such GCC with newlib offers all higher C++ standards, not just C++11. On Fri, 19 Jun 2020, 23:13 , <i...@petervanderperk.nl> wrote: > For a personal project I want to use C++11, however which C++ library > works best for that? Looking at the NuttX documentation it refers me > to a "Contemporary port of the C++11 LLVM libcxx", but this guide > ( > https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=139629545) > > is based on a older NuttX fork. > > Nevertheless I've tried to follow the steps on NuttX Master, which > works partially works with some extra modifications (had to enable > fpermissive), after basic testing it seems C++11 threads (<thread>) is > working. But when I use std::cout (<iostream>) compiling gives me the > following linker error: > > arm-none-eabi-ld: > /home/peter/brickpoweredugv/nuttx/staging/libxx.a(ios.o): in function > `std::char_traits<char>::eof()': > /home/peter/brickpoweredugv/nuttx/include/libcxx/support/xlocale/__nop_locale_mgmt.h:20: > multiple definition of `duplocale'; > /home/peter/brickpoweredugv/nuttx/staging/libapps.a(connector.home.peter.brickpoweredugv.apps.brickpoweredugv.o):/home/peter/brickpoweredugv/nuttx/include/libcxx/support/xlocale/__nop_locale_mgmt.h:20: > first defined > here > arm-none-eabi-ld: > /home/peter/brickpoweredugv/nuttx/staging/libxx.a(ios.o): in function > `freelocale': > > Thus my question is, is someone actively using libcxx with C++11 in > upstream NuttX and does it work well? Or do I have to use another > libc++ implementation > > Yours sincerely, > > Peter van der Perk > >
