Add support for illumos target
This change adds support for an illumos os target to libc. Similar to the BSDs, there is a large deal of overlap (given the common history), so the 'solaris' directory was renamed to 'solarish' (it's the closest thing to an official term to refer to things descending from Solaris as well as Solaris). There were also a number of missing definitions (as well as a couple missing functions) that have proved necessary for building a number of rust programs on illumos or Solaris.
Portions contributed by @papertigers .
Do not allow rustup to fail
Currently if rustup fails to download something the build will continue until that something is needed. This makes the job fail early and clearly.
and Solaris-derived distributions (i.e. illumos). In addition, a number
of missing definitions (and compatability functions) that have been
found necessary to run a number of rust binaries on illumos have been
added.
Portions were contributed by Mike Zeller <mike@mikezeller.net>
Build all platforms
cc @alexcrichton this needs a more thorough review. It turns out libc failed to build on a lot of older Rust versions for various reasons and platforms, so it took a while to fix the build on all of them.
This PR fixes the build on all platforms and all Rust version down to the
minimum Rust version supported by libc: Rust 1.13.0.
The `build.rs` is extended with logic to detect the newer Rust features used by
`libc` since Rust 1.13.0:
* Rust 1.19.0: `untagged_unions`. APIs using untagged unions are gated on
`cfg(libc_unions)` and not available on older Rust versions.
* Rust 1.25.0: `repr(align)`. Because `repr(align)` cannot be parsed by older
Rust versions, all uses of `repr(align)` are split into `align.rs` and
`no_align.rs` modules, which are gated on the `cfg(libc_align)` at the top
level. These modules sometimes contain macros that are expanded at the top
level to avoid privacy issues (`pub(crate)` is not available in older Rust
versions). Closes#1242 .
* Rust : `const` `mem::size_of`. These uses are worked around with hardcoded
constants on older Rust versions.
Also, `repr(packed)` structs cannot automatically `derive()` some traits like
`Debug`. These have been moved into `s_no_extra_traits!` and the lint of missing
`Debug` implementations on public items is silenced for these. We can manually
implement the `extra_traits` for these in a follow up PR. This is tracked
in #1243. Also, `extra_traits` does not enable `align` manually anymore.
Since `f64::to_bits` is not available in older Rust versions, its usage
has been replaced with a `transmute` to an `u64` which is what that method
does under the hood.
Closes#1232 .
This commit adds a `ci/build.sh` script that checks that libc builds correctly
for some common configurations (`--no-default-features`, `default`,
`extra_traits`) on most targets supported by Rust since Rust 1.13.0 (the oldest
Rust version that libc supports).
The build matrix is refactored into two stages.
The first stage is called `tools-and-build-and-tier1` and it aims to discover
issues quickly by running the documentation and linter builds, as well as
checking that the library builds correctly on all targets in all supported
channels and "problematic" Rust versions; Rust versions adding major new
features like `repr(align)`, `union`, etc. This first stage also runs
libc-test for the tier-1 targets on linux and osx. These builds finish
quickly because no emulation is necessary.
The second stage is called `tier2` and it runs libc-test for all other targets
for which we are currently able to do so.
Closes#1229 .
