Jan Kiszka <jan.kis...@siemens.com> writes:
> Hi all, > > just wanted to debug the RTnet issues we now see in CI on arm and arm64. > I picked arm as first target, but that apparently starts to break with > gcc-9 or newer (tried 9.2 and 10.2): > > make[5]: Entering directory '/xenomai/lib/cobalt/arch/arm' > CC libarch_la-features.lo > features.c: In function 'cobalt_arch_check_features': > features.c:82:1: error: r7 cannot be used in 'asm' here > 82 | } > | ^ > > That seems to be related to passing the syscall number via r7 on ARM. Is > our ABI soon no longer compilable, or can we fix this? > > Jan r7 may be used as a scratch register by gcc in some cases. -fomit-frame-pointer for debug builds may help (i.e. when the optimizer is switched off). -- Philippe.
