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gnzlbg authored
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 .
gnzlbg authoredThis 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 .
switch.rs 1.43 KiB
//! Switch C type definitions
pub type int8_t = i8;
pub type int16_t = i16;
pub type int32_t = i32;
pub type int64_t = i64;
pub type uint8_t = u8;
pub type uint16_t = u16;
pub type uint32_t = u32;
pub type uint64_t = u64;
pub type c_schar = i8;
pub type c_uchar = u8;
pub type c_short = i16;
pub type c_ushort = u16;
pub type c_int = i32;
pub type c_uint = u32;
pub type c_float = f32;
pub type c_double = f64;
pub type c_longlong = i64;
pub type c_ulonglong = u64;
pub type intmax_t = i64;
pub type uintmax_t = u64;
pub type size_t = usize;
pub type ptrdiff_t = isize;
pub type intptr_t = isize;
pub type uintptr_t = usize;
pub type ssize_t = isize;
pub type off_t = i64;
pub type c_char = u8;
pub type c_long = i64;
pub type c_ulong = u64;
pub type wchar_t = u32;
pub const INT_MIN: c_int = -2147483648;
pub const INT_MAX: c_int = 2147483647;
cfg_if! {
if #[cfg(libc_core_cvoid)] {
pub use ::ffi::c_void;
} else {
// Use repr(u8) as LLVM expects `void*` to be the same as `i8*` to help
// enable more optimization opportunities around it recognizing things
// like malloc/free.
#[repr(u8)]
#[allow(missing_copy_implementations)]
#[allow(missing_debug_implementations)]
pub enum c_void {
// Two dummy variants so the #[repr] attribute can be used.
#[doc(hidden)]
__variant1,
#[doc(hidden)]
__variant2,
}
}
}