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Signed-off-by: Alexey Neyman <stilor@att.net>
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- Pin sparc-leon-linux-gnu to GCC6, again.
- Remove "brokenness" explanation from moxie-elf comment (was only
applicable to stage-2 compiler, not final).
Signed-off-by: Alexey Neyman <stilor@att.net>
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There's no point in keeping samples which are in its essense
just a sub-set of multilib toolchain.
But still we'd like to cover quite unusual but really existing
case - ARC750, i.e. ARC700 with MMU but without so-called
atomic instructions (LLOCK/SCOND). To support this HW variation
we need:
1) Compile all target binaries without "-matomics" or even
better "-mno-atomics" so that's even future-proof
(as we may decide to enable "-matomics" by default for Linux
targets which is a recommented setup).
2) Configure libc such that it uses Linux-kernel-assisted implementation
of atomic operation via "arc_usr_cmpxchg" syscall,
see https://cgit.uclibc-ng.org/cgi/cgit/uclibc-ng.git/commit/?id=b985fa069187e4c5a7ee84213d9fbead2f219ce5
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
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ARC700 is based on ARCompact (AKA ARCv1 ISA) while ARC HS38 is
based on modern ARCv2 ISA.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
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