Hello Jan, Unlike GCC, LLVM/Clang only gives you one toolchain for all backend architectures (depending on how you configured it). You'll also need to tell LLVM/Clang where to find the sysroot to pick newlib and builtins headers/libs. GCC does that automatically for you, but LLVM/Clang does not. You can either point LLVM/Clang to the GCC-installed sysroot/multilib, or to manually/separately build newlib (libc) and compiler-rt (which corresponds to libgcc) on your own.
I have only tested building RTEMS with LLVM/Clang on RISC-V platforms, but I build my own LLVM/Clang, newlib, compiler-rt toolchain/sysroot, not from RSB. On Wed, 26 May 2021 at 11:57, <jan.som...@dlr.de> wrote: > > Ok, I build the llvm buildset with RSB and then tried to set the COMPILER > option in the ini file for the BSP, but that did not work. > Is it only available for certain BSPs or am I completely of the track? > > Best regards, > > Jan > > > -----Original Message----- > > From: devel <devel-boun...@rtems.org> On Behalf Of jan.som...@dlr.de > > Sent: Friday, May 21, 2021 12:25 PM > > To: devel@rtems.org > > Subject: Building llvm toolchain for RTEMS > > > > Hello, > > > > I see some references to llvm toolchains for RTEMS from time to time, but > > haven't really looked into it. > > Is it possible to let RSB build a clang C/C++ compiler and kernel for e.g. > > the > > Zedboard BSP? > > If yes, how would I build such a toolchain? I see that there is a llvm > > buildset in > > RSB, but it doesn't seem architecture specific. > > > > Best regards, > > > > Jan > > > > Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR) German Aerospace > > Center Institute for Software Technology | Software for Space Systems and > > Interactive Visualization | Lilienthalplatz 7 | 38108 Braunschweig | Germany > > > > Jan Sommer > > Telephone +49 531 295-2494 | Telefax 0531 295-2767 | jan.som...@dlr.de > > DLR.de/SC > > > > _______________________________________________ > > devel mailing list > > devel@rtems.org > > http://lists.rtems.org/mailman/listinfo/devel > _______________________________________________ > devel mailing list > devel@rtems.org > http://lists.rtems.org/mailman/listinfo/devel _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
