crosstool-ng/samples/arc-arc700-linux-uclibc/reported.by

reporter_name="Alexey Brodkin"
reporter_url="http://embarc.org"
reporter_comment="ARCompact uClibc Linux toolchain without atomics"
Add ARC700 and ARC HS38 Linux samples 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> 2018-05-15 13:37:24 +00:00			`reporter_name="Alexey Brodkin"`
			`reporter_url="http://embarc.org"`
ARC: Update Linux samples 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> 2018-05-21 10:33:50 +00:00			`reporter_comment="ARCompact uClibc Linux toolchain without atomics"`