Wouldn‘t the buildroot option require, that all targets needs to be supported from that single toolchain unless the not supported target defined __NUTTX__ within their own configs?
/Piet > Am 22.02.2022 um 20:14 schrieb Gregory Nutt <spudan...@gmail.com>: > > One option would be to define __NUTTX_ in tools/Config.mk instead of in > each individual apps/Makefile. That would provide a single point > definition coordinate all usage. > > My favorite solution, but not one that is easily fielded would be to use > the NuttX buildroot toolchains: > https://bitbucket.org/nuttx/buildroot/src/master/ . These generate a > nuttx-eab-gcc (toolchain not a none-eabi toolchain) and they have several > advantages: (1) they do not use a foreign libc but build directly using > the NuttX libc. So they will never generate libc header file conflicts. > and (1) they define __NUTTX__ > > The downside is that, as I recall, they don't build the C++ standard > library. > > >> On Tue, Feb 22, 2022 at 12:50 PM Gregory Nutt <spudan...@gmail.com> wrote: >> >> I have been working on an application for the past several months. Now >> want to get it running on NuttX. I don't have much experience porting >> applications to NuttX and have some dumb newbie questions (I mostly worked >> on the other side of the application/OS interface). >> >> If I have an application that builds and runs on Linux and I want to port >> it to NuttX, I would basically just provide the Kconfig files, Make.defs >> files, and Makefiles as expected by the build system, then just link my >> application anywhere in the app/ source tree. >> >> But how does the code know that it is running on NuttX? There is no >> CONFIG_NUTTX, there is no OS_managed __NUTTX__ definition. >> >> I do see a __NUTTX__ definition defined in some application Makefiles in >> apps/, but this is a chicken'n'egg problem. They use custom Makefiles to >> provide these definitions. But what if you want the same application build >> logic to support either platform. I don't see any way to do that. >> >> Has anyone thought of way to do this? Or do you all use custom Makefile >> for the NuttX build? >> >> Greg >> >>
