Struct build_env::BuildEnv

pub struct BuildEnv { /* fields omitted */ }

Allow retrieval of values pretaining to a build process that may be related to the target and/or host triple.

Methods

impl BuildEnv

fn from_env() -> Result<BuildEnv, VarError>

Use environment variables (such as those set by cargo) to determine values for target and host via the environment variables TARGET and HOST.

fn new_cross(host: String, target: String) -> BuildEnv

Construct a BuildEnv where the host and target may be different.

fn new(trip: String) -> BuildEnv

Construct a BuildEnv where target and host are the same.

fn target(&self) -> &str

The target we're supplying values for

fn host(&self) -> &str

The host we're supplying values for

fn var<K: AsRef<OsStr>>(&self, var_base: K) -> Option<OsString>

Query the environment for a value, trying the most specific first, before querying more general variables.

1. <var>_<target> - for example, CC_x86_64-unknown-linux-gnu
2. <var>_<target_with_underscores> - for example, CC_x86_64_unknown_linux_gnu
3. <build-kind>_<var> - for example, HOST_CC or TARGET_CFLAGS
4. <var> - a plain CC, AR as above.

fn var_str<K: AsRef<OsStr> + Debug + Any>(
    &self,
    var_base: K
) -> Result<String, VarError<K>>

The same as Self::var(), but converts the return to an OsString and provides a useful error message

Trait Implementations

impl Debug for BuildEnv

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Clone for BuildEnv

fn clone(&self) -> BuildEnv

Returns a copy of the value.

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

Performs copy-assignment from source.