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rustbuild: support MIPS host builds #37625

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merged 1 commit into from Nov 7, 2016

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xen0n commented Nov 7, 2016

There is a little code duplication, but primarily for sake of "match exhaustiveness". Let's blame Linux/MIPS for not exposing endianness explicitly in uname -m (that's user-space interface and as such is frozen).

Currently the build won't work as we have to wait for a new stage0 for the MIPS host compilers, but this paves the way to self-hosted Rust on MIPS. The cross-compiled MIPS binaries are confirmed to work on the Loongson 3A2000 (MIPS64r2-compatible) so we have plenty of confidence that they'll work on other MIPS platforms too, as Linux/MIPS user-space ABI is consistent across machines of the same bitness.

r? @alexcrichton

rustbuild: support MIPS host builds
There is a *little* code duplication, but primarily for sake of "match
exhaustiveness". Let's blame Linux/MIPS for not exposing endianness
explicitly in `uname -m` (that's user-space interface and as such is
frozen).

Currently the build won't work as we have to wait for a new stage0 for
the MIPS host compilers, but this paves the way to self-hosted Rust on
MIPS. The cross-compiled MIPS binaries are confirmed to work on the
Loongson 3A2000 (MIPS64r2-compatible) so we have plenty of confidence
that they'll work on other MIPS platforms too, as Linux/MIPS user-space
ABI is consistent across machines of the same bitness.
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alexcrichton commented Nov 7, 2016

@bors: r+ rollup

Thanks!

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bors commented Nov 7, 2016

📌 Commit 0d433a8 has been approved by alexcrichton

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bors commented Nov 7, 2016

⌛️ Testing commit 0d433a8 with merge ec0d1ce...

bors added a commit that referenced this pull request Nov 7, 2016

Auto merge of #37625 - xen0n:rustbuild-mips, r=alexcrichton
rustbuild: support MIPS host builds

There is a *little* code duplication, but primarily for sake of "match exhaustiveness". Let's blame Linux/MIPS for not exposing endianness explicitly in `uname -m` (that's user-space interface and as such is frozen).

Currently the build won't work as we have to wait for a new stage0 for the MIPS host compilers, but this paves the way to self-hosted Rust on MIPS. The cross-compiled MIPS binaries are confirmed to work on the Loongson 3A2000 (MIPS64r2-compatible) so we have plenty of confidence that they'll work on other MIPS platforms too, as Linux/MIPS user-space ABI is consistent across machines of the same bitness.

r? @alexcrichton

@bors bors merged commit 0d433a8 into rust-lang:master Nov 7, 2016

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@xen0n xen0n deleted the xen0n:rustbuild-mips branch Nov 8, 2016

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