Struct GnucVersion 

pub struct GnucVersion {
    pub major: u32,
    pub minor: u32,
    pub patch: u32,
}

The GCC release the compiler claims to be, as __GNUC__, __GNUC_MINOR__ and __GNUC_PATCHLEVEL__.

Design: spec/04-driver-and-cli.md section 4.5, which makes this a knob rather than a constant and says to start conservative and raise it as the matrix in rucc-gnu fills in.

The default is seven, which is the lowest claim that gets a modern glibc. glibc gates most of what it hands a caller on __GNUC_PREREQ, so the claim decides which half of sys/cdefs.h we get, and below seven bits/floatn-common.h writes typedef float _Float32; over a keyword this compiler already has. Every header that reaches it stops there, which was most of them: on Ubuntu 24.04’s glibc 2.39 the claim of 4.2.1 that stood here before got 180 of 214 headers through and seven gets 202, and the amalgamated sqlite goes from four errors to none.

It is still deliberately low. Claiming a version whose promises have not been kept means being handed syntax the compiler cannot parse, so this moves when there is a measurement saying it can. Thirteen and sixteen were measured alongside seven and came out identical on glibc, on the macOS SDK and on sqlite, so the next move up is cheap; it is a separate one because nothing yet needs it.

Fields

major: u32

__GNUC__.

minor: u32

__GNUC_MINOR__.

patch: u32

__GNUC_PATCHLEVEL__.

Trait Implementations

impl Clone for GnucVersion

fn clone(&self) -> GnucVersion

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for GnucVersion

impl Debug for GnucVersion

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

Formats the value using the given formatter.

impl Default for GnucVersion

fn default() -> GnucVersion

Returns the “default value” for a type.

impl Eq for GnucVersion

impl FromStr for GnucVersion

fn from_str(text: &str) -> Result<GnucVersion, String>

Reads -fgnuc-version=, which is 15, 15.1 or 15.1.0.

The short forms are not a convenience, they are what people write. A missing component is zero, the same way GCC treats a release with no patchlevel.

type Err = String

The associated error which can be returned from parsing.

impl Hash for GnucVersion

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

where __H: Hasher,

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 Ord for GnucVersion

fn cmp(&self, other: &GnucVersion) -> 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 GnucVersion

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for GnucVersion

fn partial_cmp(&self, other: &GnucVersion) -> 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 GnucVersion