Jeremi Piotrowski wrote: > 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'. >
arm-none-eabi is also what I'm using here on a similar platform. To the OP, if you only need to build some program for ARM and not install a gentoo system on the target then you could download the pre-built cross-compiler toolchain from the ARM site (https://developer.arm.com/open-source/gnu-toolchain/gnu-rm/downloads). raffaele
