Enum Licence 

pub enum Licence {
    Mit,
    Lgpl,
    Bsd,
    LinuxUapi,
    MingwPermissive,
    Apache2,
    AppleSdk,
    MicrosoftSdk,
}

The licence an input arrives under.

The list is section 8.2’s table with one variant per row, plus the kernel headers, which every Linux row needs and which no row is about. A closed list rather than a free text field, because the question Licence::redistributable answers has to have an answer for every input and a string does not.

Variants

Mit

musl, which is MIT and the reason it goes first.

Lgpl

glibc, which is LGPL. Redistributable, with obligations that spec/cross-compile/13-distribution.md owns.

Bsd

The BSD libcs, which are permissive.

LinuxUapi

The Linux uapi headers, which are GPL-2.0 with the syscall note.

The note is the whole reason this is a separate variant and not a refusal: it says that using the headers to make a system call does not put the calling program under the GPL, which is what every libc and every cross toolchain relies on. Redistributing the headers themselves carries the GPL’s own obligation, and the pinned source URL in the manifest is how it is met, the same way it is for glibc.

MingwPermissive

mingw-w64, which is a mix of permissive licences and public domain headers.

Apache2

Ours. The compiler’s own headers and its runtime.

AppleSdk

The macOS SDK, restricted by the Xcode agreement to Apple-branded hardware. Never shipped, only ever pointed at.

MicrosoftSdk

The Windows SDK and the universal CRT, which are not redistributable.

Implementations

impl Licence

pub const fn redistributable(self) -> bool

Whether an artifact containing this input can be published.

Two of the eight answer false, and they are the two section 8.6 calls legal walls rather than engineering. A sysroot containing either is a local thing on the machine of somebody who accepted the licence themselves.

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

The spelling in a manifest file.

Trait Implementations

impl Clone for Licence

fn clone(&self) -> Licence

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Licence

impl Debug for Licence

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

Formats the value using the given formatter.

impl Display for Licence

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

Formats the value using the given formatter.

impl Eq for Licence

impl FromStr for Licence

type Err = ManifestError

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 Ord for Licence

fn cmp(&self, other: &Licence) -> Ordering

This method returns an Ordering between self and other.

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

where Self: Sized,

Compares and returns the maximum of two values.

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

where Self: Sized,

Compares and returns the minimum of two values.

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

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for Licence

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Licence

fn partial_cmp(&self, other: &Licence) -> Option<Ordering>

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl StructuralPartialEq for Licence