Enum build_target::Env

#[non_exhaustive]
pub enum Env<'a> {
    GNU,
    MSVC,
    Musl,
    SGX,
    uClibc,
    Other(Cow<'a, str>),
}

target_env: target enviroment that disambiguates the target platform by ABI / libc. This value is closely related to the fourth element of the platform target triple, though it is not identical. For example, embedded ABIs such as gnueabihf will simply define target_env as "gnu" (i.e. Env::GNU)

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

GNU

gnu: The GNU C Library (glibc)

MSVC

msvc: Microsoft Visual C(++)

Musl

musl: Clean, efficient, standards-conformant libc implementation.

SGX

sgx: Intel Software Guard Extensions (SGX) Enclave

uClibc

uclibc: C library for developing embedded Linux systems

Other

Unknown target environment

Tuple Fields of Other

0: Cow<'a, str>

Implementations

impl<'a> Env<'a>

pub fn as_str(&self) -> &str

String representing this environment which matches #[cfg(target_env)].

pub fn target() -> Result<Self, VarError>

Trait Implementations

impl<'a> Clone for Env<'a>

fn clone(&self) -> Env<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Env<'a>

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

Formats the value using the given formatter.

impl<'a> Display for Env<'a>

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

Formats the value using the given formatter.

impl<'a> Hash for Env<'a>

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, 

Feeds a slice of this type into the given Hasher.

impl<'a> Ord for Env<'a>

fn cmp(&self, other: &Env<'a>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl<'a> PartialEq<Env<'a>> for Env<'a>

fn eq(&self, other: &Env<'a>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Env<'a>) -> bool

This method tests for !=.

impl<'a> PartialOrd<Env<'a>> for Env<'a>

fn partial_cmp(&self, other: &Env<'a>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl<'a> Eq for Env<'a>

impl<'a> StructuralEq for Env<'a>

impl<'a> StructuralPartialEq for Env<'a>