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Support static linking with glibc and target-feature=+crt-static #77386

Merged
merged 4 commits into from
Oct 6, 2020
Merged

Support static linking with glibc and target-feature=+crt-static #77386

merged 4 commits into from
Oct 6, 2020
+17 −32

Commits on Oct 5, 2020

  1. Update libc to 0.2.79 

    This also fixes issues with inconsistent `unsafe` on functions.
    @joshtriplett
    joshtriplett committed Oct 5, 2020
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  2. unwind: Move linux-gnu library linking to lib.rs and libc 

    This unifies it with the handling of `target-feature=+crt-static` on
other platforms, and allows for supporting static glibc in the future.
    @joshtriplett
    joshtriplett committed Oct 5, 2020
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  3. Support static linking with glibc and target-feature=+crt-static 

    With this change, it's possible to build on a linux-gnu target and pass
RUSTFLAGS='-C target-feature=+crt-static' or the equivalent via a
`.cargo/config.toml` file, and get a statically linked executable.

This requires libc 0.2.79, which adds support for static linking with
glibc.

Add `crt_static_respected` to the `linux_base` target spec.

Update `android_base` and `linux_musl_base` accordingly. Avoid enabling
crt_static_respected on Android platforms, since that hasn't been
tested.
    @joshtriplett
    joshtriplett committed Oct 5, 2020
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  4. Add comment explaining why libunwind doesn't need to link libgcc_eh

    @joshtriplett
    joshtriplett committed Oct 5, 2020
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