Enum TargetEnvironment 

pub enum TargetEnvironment {
    Gnu,
    Musl,
    Lamina,
    Eabi,
    Eabihf,
    Freestanding,
}

The C runtime and ABI a target means.

Variants

Gnu

glibc, with the architecture’s own floating-point ABI.

Musl

musl libc.

Lamina

Lamina’s own C library, beside musl rather than on top of it.

Reserved: the axis carries the choice so the target grammar is settled, but no Lamina libc has been written. Every environment-derived property that would name a file answers None for it, and a link refuses by name.

Eabi

ARM EABI with the soft-float calling convention.

Eabihf

ARM EABI with the hard-float calling convention: floats in VFP registers.

Freestanding

No libc and no compiler runtime: bare metal, or an operating system that supplies its own runtime and leaves nothing for this axis to choose.

Implementations

impl TargetEnvironment

pub const ALL: [Self; 6]

Every environment a target string may name, in the order the diagnostics list them.

pub const fn token(self) -> &'static str

Spelling in a target string.

pub const fn libc(self) -> Option<Libc>

The C library this environment links, or None when it links none.

pub const fn compiler_runtime(self) -> CompilerRuntime

Where the 128-bit integer helpers and the other compiler-runtime symbols come from.

pub const fn hardware_float(self) -> bool

Whether the calling convention passes floating-point values in floating-point registers. This is the eabi/eabihf distinction on 32-bit ARM.

pub const fn is_hosted(self) -> bool

Whether C runtime objects and a libc are linked at all.

Trait Implementations

impl Clone for TargetEnvironment

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for TargetEnvironment

impl Debug for TargetEnvironment

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for TargetEnvironment

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for TargetEnvironment

impl FromStr for TargetEnvironment

type Err = &'static str

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for TargetEnvironment

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for TargetEnvironment

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for TargetEnvironment