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toolchain/toolchain-buildroot: enable glibc for all little-endian ARCs with atomic ops

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Initially we had a port only for ARCv2 cores but then with a simple
change ARCompact cores got supported as well.

So we generalize from BR2_archs to BR2_arcle as we haven't tried to
get glibc working on big-endian ARCs yet.

Also we never bothered to check avaialbility of atomic instructions in
the core but in case of Glibc for ARC this is really a must, so we add
this check here.

Note in case of uClibc we may have system w/o HW atomics but:

 1. Only single-core systems are allowed
 2. Atomic instructions are emulated via arc_usr_cmpxchg syscall

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Alexey Brodkin 2018-11-09 23:09:49 +03:00 committed by Thomas Petazzoni
parent 87290b8084
commit 311af5e8c2
1 changed files with 1 additions and 1 deletions

2
toolchain/toolchain-buildroot/Config.in
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@ -48,7 +48,7 @@ config BR2_TOOLCHAIN_BUILDROOT_GLIBC
BR2_powerpc || BR2_powerpc64 || BR2_powerpc64le || \
BR2_riscv || BR2_sh || BR2_sparc64 || \
BR2_x86_64 || BR2_microblaze || BR2_nios2 || \
BR2_archs38
(BR2_arcle && BR2_ARC_ATOMIC_EXT)
depends on BR2_USE_MMU
depends on !BR2_STATIC_LIBS
depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2