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author | gnzlbg <gonzalobg88@gmail.com> | 2019-02-07 11:37:21 +0100 |
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committer | gnzlbg <gonzalobg88@gmail.com> | 2019-02-07 13:44:32 +0100 |
commit | a17a91cdbf13a43af4e24c0f5498ff6a5e6271c5 (patch) | |
tree | 61e87c1bc93fea6149fa4ac1201059aee3249e09 /Cargo.toml | |
parent | 8f1acf4643293a22c3888423eb9d48d0ee351fa7 (diff) | |
download | rust-libc-a17a91cdbf13a43af4e24c0f5498ff6a5e6271c5.tar.gz |
Fix build on all platforms
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 .
Diffstat (limited to 'Cargo.toml')
-rw-r--r-- | Cargo.toml | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Cargo.toml b/Cargo.toml index d20fc69ba8..d72aa8c97d 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -27,7 +27,7 @@ default = ["use_std"] use_std = [] align = [] rustc-dep-of-std = ['align', 'rustc-std-workspace-core'] -extra_traits = ["align"] +extra_traits = [] [workspace] members = ["libc-test"] |