Compiling RIOT on Apple M1

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1

Hi all, I’m having issues compiling the riot examples on MacOS on an M1 chip. Initially I had an error in native_cpu.c and irq_cpu.c where the __eip register wasn’t recognised. I replaced this with __pc which solved that error.

static void _native_mod_ctx_leave_sigh(ucontext_t *ctx)
{
#ifdef __MACH__
    _native_saved_eip = ((ucontext_t *)ctx)->uc_mcontext->__ss.__eip;
    ((ucontext_t *)ctx)->uc_mcontext->__ss.__eip = (unsigned int)&_native_sig_leave_handler;
#elif defined(__FreeBSD__) ...

However I then had a number of errors where the instruction mnemonics for some assembly instructions weren’t recognised:

/Users/ben/Desktop/Projects/RIOT/cpu/native/tramp.S:26:5: error: unrecognized instruction mnemonic, did you mean: fmov, mov, movi, movk, movn, movz, smov, umov?
    movl $0x0, __native_in_isr

My guess is that RIOT is assuming that all macs are Intel-based. I tried to compile for ARM with the command line arguments -D__arm__=1 -U__MACH__ but there are a variety of errors such as no member named 'arm_pc' in 'struct __darwin_mcontext64' which strongly suggest I’m not supposed to do that.

For now I will try to compile on Ubuntu in a VM or something, but compiling on my actual device would be far preferable. Let me know if I can provide any more useful information:)

2

Welcome @benmandrew!

Thanks for the heads-up, but RIOT native does not compile on Mac OSX for a long time already. I am going to amend this info, however.

3

Thank you for the quick reply!