On Sun, May 27, 2018 at 05:06:43AM +0200, tu...@posteo.de wrote: > Hi, > > too feed a STM32F103C8T6 MCU (Core-M3) with some code to execute, > I want a compiler. For that I did a > > crossdev arm-unknown-linux-gnu > > . That one failed to build (gcc, binytils seem to be ok). > That triplet is not going to work for that hardware for two reasons:
- bare-metal implies no kernel so 'linux' is wrong - gnu (== glibc) is not going to work on bare-metal What you're looking for is 'arm-none-eabi', that's what all the vendor supplied prebuilt toolchains use. That triplet will use 'newlib' as the libc, which is the correct choice for bare-metal. I wouldv'e said 'arm-unknown-linux-eabi' or the gentoo specific 'armv7m-softfloat-none-eabi' but for some reasons the binutils build chokes on that. However compared to arm-none-eabi the only thing these triplets do is change some of the configured defaults (arch/fpu/..., see /usr/portage/eclass/toolchain.eclass), so you should be fine with 'arm-none-eabi'.
