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Increase the minimum linux-gnu versions #95026

Merged
merged 5 commits into from
Aug 5, 2022
Merged

Increase the minimum linux-gnu versions #95026

merged 5 commits into from
Aug 5, 2022

Commits on Aug 4, 2022

  1. Increase the minimum linux-gnu versions 

    This is implementing the MCP from rust-lang/compiler-team#493. It is
increasing the minimum requirements of a couple Tier 1 targets, and
others at lower tiers, so this should go through FCP sign-offs for both
`T-compiler` and `T-release`.

The new `linux-gnu` baseline is kernel 3.2 and glibc 2.17. We will also
take that kernel as the minimum floor for _all_ `*-linux-*` targets, so
it may be broadly assumed in the implementation of the standard library.
That does not preclude specific targets from having greater requirements
where it makes sense, like a new arch needing something newer, or a
platform like `linux-android` choosing a newer baseline.
    @cuviper
    cuviper committed Aug 4, 2022
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  2. Clarify the comment about CentOS 7's kernel version

    @cuviper
    cuviper committed Aug 4, 2022
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  3. doc: s390x also requires glibc 2.17 

    Co-authored-by: Jubilee <46493976+workingjubilee@users.noreply.github.com>
    @cuviper @workingjubilee
    cuviper and workingjubilee committed Aug 4, 2022
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  4. Downgrade dist-powerpc-linux binutils to 2.30 

    With binutils 2.32, we were getting errors like this:

    relocation truncated to fit: R_PPC_PLTREL24 against symbol
        `__cxa_atexit@@GLIBC_2.1.3' defined in .plt section in
        /x-tools/powerpc-unknown-linux-gnu/powerpc-unknown-linux-gnu/sysroot/usr/lib/crt1.o

but it builds okay with binutils 2.30.
    @cuviper
    cuviper committed Aug 4, 2022
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  5. Link /rustroot/lib stuff for clang -m32 to see

    @cuviper
    cuviper committed Aug 4, 2022
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