Make the rand dependency optional.

.github/Xargo.toml

@@ -1,2 +1,5 @@
 [target.x86_64-unknown-linux-gnu.dependencies]
+alloc = {}
+
+[target.thumbv7em-none-eabihf.dependencies]
 alloc = {}

.github/workflows/nalgebra-ci-build.yml

@@ -90,7 +90,11 @@ jobs:
           components: rustfmt
       - name: install xargo
         run: cp .github/Xargo.toml .; rustup component add rust-src; cargo install -f xargo;
-      - name: build
+      - name: build x86_64-unknown-linux-gnu
         run: xargo build --verbose --no-default-features --target=x86_64-unknown-linux-gnu;
-      - name: build --feature alloc
+      - name: build x86_64-unknown-linux-gnu --features rand-no-std
+        run: xargo build --verbose --no-default-features --target=x86_64-unknown-linux-gnu;
+      - name: build x86_64-unknown-linux-gnu --features alloc
         run: xargo build --verbose --no-default-features --features alloc --target=x86_64-unknown-linux-gnu;
+      - name: build thumbv7em-none-eabihf
+        run: xargo build --verbose --no-default-features --target=thumbv7em-none-eabihf;

Cargo.toml

@@ -23,12 +23,14 @@ path = "src/lib.rs"
 
 [features]
 default         = [ "std" ]
-std             = [ "matrixmultiply", "rand/std", "rand/std_rng", "rand_distr", "simba/std" ]
+std             = [ "matrixmultiply", "simba/std" ]
+rand-no-std     = [ "rand-package" ]
+rand            = [ "rand-no-std", "rand-package/std", "rand-package/std_rng", "rand_distr" ]
 arbitrary       = [ "quickcheck" ]
 serde-serialize = [ "serde", "num-complex/serde" ]
 abomonation-serialize = [ "abomonation" ]
 sparse = [ ]
-debug = [ "approx/num-complex", "rand/std" ]
+debug = [ "approx/num-complex", "rand" ]
 alloc = [ ]
 io = [ "pest", "pest_derive" ]
 compare = [ "matrixcompare-core" ]
@@ -43,8 +45,7 @@ slow-tests = []
 [dependencies]
 typenum        = "1.12"
 generic-array  = "0.14"
-rand           = { version = "0.8", default-features = false }
-getrandom      = { version = "0.2", default-features = false, features = [ "js" ] } # For wasm
+rand-package   = { package = "rand", version = "0.8", optional = true, default-features = false }
 num-traits     = { version = "0.2", default-features = false }
 num-complex    = { version = "0.3", default-features = false }
 num-rational   = { version = "0.3", default-features = false }

src/base/construction.rs

@@ -7,18 +7,16 @@ use crate::base::storage::Owned;
 use quickcheck::{Arbitrary, Gen};
 
 use num::{Bounded, One, Zero};
-#[cfg(feature = "std")]
-use rand;
-use rand::distributions::{Distribution, Standard};
-use rand::Rng;
-#[cfg(feature = "std")]
-use rand_distr::StandardNormal;
+#[cfg(feature = "rand-no-std")]
+use rand::{
+    distributions::{Distribution, Standard},
+    Rng,
+};
+
 use std::iter;
 use std::mem;
 use typenum::{self, Cmp, Greater};
 
-#[cfg(feature = "std")]
-use simba::scalar::RealField;
 use simba::scalar::{ClosedAdd, ClosedMul};
 
 use crate::base::allocator::Allocator;
@@ -281,7 +279,7 @@ where
 
     /// Creates a matrix filled with random values.
     #[inline]
-    #[cfg(feature = "std")]
+    #[cfg(feature = "rand")]
     pub fn new_random_generic(nrows: R, ncols: C) -> Self
     where
         Standard: Distribution<N>,
@@ -291,6 +289,7 @@ where
 
     /// Creates a matrix filled with random values from the given distribution.
     #[inline]
+    #[cfg(feature = "rand-no-std")]
     pub fn from_distribution_generic<Distr: Distribution<N> + ?Sized, G: Rng + ?Sized>(
         nrows: R,
         ncols: C,
@@ -589,6 +588,7 @@ macro_rules! impl_constructors(
 
         /// Creates a matrix or vector filled with random values from the given distribution.
         #[inline]
+        #[cfg(feature = "rand-no-std")]
         pub fn from_distribution<Distr: Distribution<N> + ?Sized, G: Rng + ?Sized>(
             $($args: usize,)*
             distribution: &Distr,
@@ -599,7 +599,7 @@ macro_rules! impl_constructors(
 
         /// Creates a matrix filled with random values.
         #[inline]
-        #[cfg(feature = "std")]
+        #[cfg(feature = "rand")]
         pub fn new_random($($args: usize),*) -> Self
             where Standard: Distribution<N> {
             Self::new_random_generic($($gargs),*)
@@ -817,6 +817,7 @@ where
     }
 }
 
+#[cfg(feature = "rand-no-std")]
 impl<N: Scalar, R: Dim, C: Dim> Distribution<MatrixMN<N, R, C>> for Standard
 where
     DefaultAllocator: Allocator<N, R, C>,
@@ -851,11 +852,11 @@ where
     }
 }
 
-#[cfg(feature = "std")]
-impl<N: RealField, D: DimName> Distribution<Unit<VectorN<N, D>>> for Standard
+#[cfg(feature = "rand")]
+impl<N: crate::RealField, D: DimName> Distribution<Unit<VectorN<N, D>>> for Standard
 where
     DefaultAllocator: Allocator<N, D>,
-    StandardNormal: Distribution<N>,
+    rand_distr::StandardNormal: Distribution<N>,
 {
     /// Generate a uniformly distributed random unit vector.
     #[inline]
@@ -863,7 +864,7 @@ where
         Unit::new_normalize(VectorN::from_distribution_generic(
             D::name(),
             U1,
-            &StandardNormal,
+            &rand_distr::StandardNormal,
             rng,
         ))
     }

src/base/helper.rs

@@ -1,7 +1,11 @@
 #[cfg(feature = "arbitrary")]
 use quickcheck::{Arbitrary, Gen};
-use rand::distributions::{Distribution, Standard};
-use rand::Rng;
+
+#[cfg(feature = "rand-no-std")]
+use rand::{
+    distributions::{Distribution, Standard},
+    Rng,
+};
 
 /// Simple helper function for rejection sampling
 #[cfg(feature = "arbitrary")]
@@ -17,6 +21,7 @@ pub fn reject<F: FnMut(&T) -> bool, T: Arbitrary>(g: &mut Gen, f: F) -> T {
 
 #[doc(hidden)]
 #[inline]
+#[cfg(feature = "rand-no-std")]
 pub fn reject_rand<G: Rng + ?Sized, F: FnMut(&T) -> bool, T>(g: &mut G, f: F) -> T
 where
     Standard: Distribution<T>,

src/geometry/isometry_construction.rs

@@ -4,10 +4,12 @@ use crate::base::storage::Owned;
 use quickcheck::{Arbitrary, Gen};
 
 use num::One;
-use rand::distributions::{Distribution, Standard};
-use rand::Rng;
+#[cfg(feature = "rand-no-std")]
+use rand::{
+    distributions::{Distribution, Standard},
+    Rng,
+};
 
-use simba::scalar::RealField;
 use simba::simd::SimdRealField;
 
 use crate::base::allocator::Allocator;
@@ -80,7 +82,8 @@ where
     }
 }
 
-impl<N: RealField, D: DimName, R> Distribution<Isometry<N, D, R>> for Standard
+#[cfg(feature = "rand-no-std")]
+impl<N: crate::RealField, D: DimName, R> Distribution<Isometry<N, D, R>> for Standard
 where
     R: AbstractRotation<N, D>,
     Standard: Distribution<N> + Distribution<R>,

src/geometry/orthographic.rs

@@ -1,7 +1,10 @@
 #[cfg(feature = "arbitrary")]
 use quickcheck::{Arbitrary, Gen};
-use rand::distributions::{Distribution, Standard};
-use rand::Rng;
+#[cfg(feature = "rand-no-std")]
+use rand::{
+    distributions::{Distribution, Standard},
+    Rng,
+};
 #[cfg(feature = "serde-serialize")]
 use serde::{Deserialize, Deserializer, Serialize, Serializer};
 use std::fmt;
@@ -10,7 +13,6 @@ use std::mem;
 use simba::scalar::RealField;
 
 use crate::base::dimension::U3;
-use crate::base::helper;
 use crate::base::storage::Storage;
 use crate::base::{Matrix4, Vector, Vector3};
 
@@ -684,11 +686,13 @@ impl<N: RealField> Orthographic3<N> {
     }
 }
 
+#[cfg(feature = "rand-no-std")]
 impl<N: RealField> Distribution<Orthographic3<N>> for Standard
 where
     Standard: Distribution<N>,
 {
     fn sample<R: Rng + ?Sized>(&self, r: &mut R) -> Orthographic3<N> {
+        use crate::base::helper;
         let left = r.gen();
         let right = helper::reject_rand(r, |x: &N| *x > left);
         let bottom = r.gen();
@@ -706,6 +710,7 @@ where
     Matrix4<N>: Send,
 {
     fn arbitrary(g: &mut Gen) -> Self {
+        use crate::base::helper;
         let left = Arbitrary::arbitrary(g);
         let right = helper::reject(g, |x: &N| *x > left);
         let bottom = Arbitrary::arbitrary(g);

src/geometry/perspective.rs

@@ -1,7 +1,10 @@
 #[cfg(feature = "arbitrary")]
 use quickcheck::{Arbitrary, Gen};
-use rand::distributions::{Distribution, Standard};
-use rand::Rng;
+#[cfg(feature = "rand-no-std")]
+use rand::{
+    distributions::{Distribution, Standard},
+    Rng,
+};
 
 #[cfg(feature = "serde-serialize")]
 use serde::{Deserialize, Deserializer, Serialize, Serializer};
@@ -11,7 +14,6 @@ use std::mem;
 use simba::scalar::RealField;
 
 use crate::base::dimension::U3;
-use crate::base::helper;
 use crate::base::storage::Storage;
 use crate::base::{Matrix4, Scalar, Vector, Vector3};
 
@@ -268,11 +270,13 @@ impl<N: RealField> Perspective3<N> {
     }
 }
 
+#[cfg(feature = "rand-no-std")]
 impl<N: RealField> Distribution<Perspective3<N>> for Standard
 where
     Standard: Distribution<N>,
 {
     fn sample<'a, R: Rng + ?Sized>(&self, r: &'a mut R) -> Perspective3<N> {
+        use crate::base::helper;
         let znear = r.gen();
         let zfar = helper::reject_rand(r, |&x: &N| !(x - znear).is_zero());
         let aspect = helper::reject_rand(r, |&x: &N| !x.is_zero());
@@ -284,6 +288,7 @@ where
 #[cfg(feature = "arbitrary")]
 impl<N: RealField + Arbitrary> Arbitrary for Perspective3<N> {
     fn arbitrary(g: &mut Gen) -> Self {
+        use crate::base::helper;
         let znear = Arbitrary::arbitrary(g);
         let zfar = helper::reject(g, |&x: &N| !(x - znear).is_zero());
         let aspect = helper::reject(g, |&x: &N| !x.is_zero());

src/geometry/point_construction.rs

@@ -2,8 +2,11 @@
 use quickcheck::{Arbitrary, Gen};
 
 use num::{Bounded, One, Zero};
-use rand::distributions::{Distribution, Standard};
-use rand::Rng;
+#[cfg(feature = "rand-no-std")]
+use rand::{
+    distributions::{Distribution, Standard},
+    Rng,
+};
 
 use crate::base::allocator::Allocator;
 use crate::base::dimension::{DimName, DimNameAdd, DimNameSum, U1};
@@ -138,6 +141,7 @@ where
     }
 }
 
+#[cfg(feature = "rand-no-std")]
 impl<N: Scalar, D: DimName> Distribution<Point<N, D>> for Standard
 where
     DefaultAllocator: Allocator<N, D>,

src/geometry/quaternion_construction.rs

@@ -5,9 +5,13 @@ use crate::base::storage::Owned;
 #[cfg(feature = "arbitrary")]
 use quickcheck::{Arbitrary, Gen};
 
+#[cfg(feature = "rand-no-std")]
+use rand::{
+    distributions::{Distribution, OpenClosed01, Standard},
+    Rng,
+};
+
 use num::{One, Zero};
-use rand::distributions::{Distribution, OpenClosed01, Standard};
-use rand::Rng;
 
 use simba::scalar::RealField;
 use simba::simd::SimdBool;
@@ -144,6 +148,7 @@ where
     }
 }
 
+#[cfg(feature = "rand-no-std")]
 impl<N: SimdRealField> Distribution<Quaternion<N>> for Standard
 where
     Standard: Distribution<N>,
@@ -812,6 +817,7 @@ where
     }
 }
 
+#[cfg(feature = "rand-no-std")]
 impl<N: SimdRealField> Distribution<UnitQuaternion<N>> for Standard
 where
     N::Element: SimdRealField,

src/geometry/rotation_specialization.rs

@@ -4,8 +4,13 @@ use crate::base::storage::Owned;
 use quickcheck::{Arbitrary, Gen};
 
 use num::Zero;
-use rand::distributions::{Distribution, OpenClosed01, Standard};
-use rand::Rng;
+
+#[cfg(feature = "rand-no-std")]
+use rand::{
+    distributions::{Distribution, OpenClosed01, Standard},
+    Rng,
+};
+
 use simba::scalar::RealField;
 use simba::simd::{SimdBool, SimdRealField};
 use std::ops::Neg;
@@ -256,6 +261,7 @@ impl<N: SimdRealField> Rotation2<N> {
     }
 }
 
+#[cfg(feature = "rand-no-std")]
 impl<N: SimdRealField> Distribution<Rotation2<N>> for Standard
 where
     N::Element: SimdRealField,
@@ -912,6 +918,7 @@ impl<N: SimdRealField> Rotation3<N> {
     }
 }
 
+#[cfg(feature = "rand-no-std")]
 impl<N: SimdRealField> Distribution<Rotation3<N>> for Standard
 where
     N::Element: SimdRealField,

src/geometry/similarity_construction.rs

@@ -4,10 +4,12 @@ use crate::base::storage::Owned;
 use quickcheck::{Arbitrary, Gen};
 
 use num::One;
-use rand::distributions::{Distribution, Standard};
-use rand::Rng;
+#[cfg(feature = "rand-no-std")]
+use rand::{
+    distributions::{Distribution, Standard},
+    Rng,
+};
 
-use simba::scalar::RealField;
 use simba::simd::SimdRealField;
 
 use crate::base::allocator::Allocator;
@@ -59,7 +61,8 @@ where
     }
 }
 
-impl<N: RealField, D: DimName, R> Distribution<Similarity<N, D, R>> for Standard
+#[cfg(feature = "rand-no-std")]
+impl<N: crate::RealField, D: DimName, R> Distribution<Similarity<N, D, R>> for Standard
 where
     R: AbstractRotation<N, D>,
     DefaultAllocator: Allocator<N, D>,
@@ -107,8 +110,8 @@ where
 #[cfg(feature = "arbitrary")]
 impl<N, D: DimName, R> Arbitrary for Similarity<N, D, R>
 where
-    N: RealField + Arbitrary + Send,
-    N::Element: RealField,
+    N: crate::RealField + Arbitrary + Send,
+    N::Element: crate::RealField,
     R: AbstractRotation<N, D> + Arbitrary + Send,
     DefaultAllocator: Allocator<N, D>,
     Owned<N, D>: Send,

src/geometry/translation_construction.rs

@@ -4,8 +4,11 @@ use crate::base::storage::Owned;
 use quickcheck::{Arbitrary, Gen};
 
 use num::{One, Zero};
-use rand::distributions::{Distribution, Standard};
-use rand::Rng;
+#[cfg(feature = "rand-no-std")]
+use rand::{
+    distributions::{Distribution, Standard},
+    Rng,
+};
 
 use simba::scalar::ClosedAdd;
 
@@ -49,6 +52,7 @@ where
     }
 }
 
+#[cfg(feature = "rand-no-std")]
 impl<N: Scalar, D: DimName> Distribution<Translation<N, D>> for Standard
 where
     DefaultAllocator: Allocator<N, D>,

src/geometry/unit_complex_construction.rs

@@ -1,10 +1,14 @@
 #[cfg(feature = "arbitrary")]
 use quickcheck::{Arbitrary, Gen};
 
+#[cfg(feature = "rand-no-std")]
+use rand::{
+    distributions::{Distribution, OpenClosed01, Standard},
+    Rng,
+};
+
 use num::One;
 use num_complex::Complex;
-use rand::distributions::{Distribution, OpenClosed01, Standard};
-use rand::Rng;
 
 use crate::base::dimension::{U1, U2};
 use crate::base::storage::Storage;
@@ -377,6 +381,7 @@ where
     }
 }
 
+#[cfg(feature = "rand-no-std")]
 impl<N: SimdRealField> Distribution<UnitComplex<N>> for Standard
 where
     N::Element: SimdRealField,

src/lib.rs

@@ -89,26 +89,16 @@ an optimized set of tools for computer graphics and physics. Those features incl
 #![cfg_attr(all(feature = "alloc", not(feature = "std")), feature(alloc))]
 #![cfg_attr(feature = "no_unsound_assume_init", allow(unreachable_code))]
 
-#[cfg(feature = "arbitrary")]
-extern crate quickcheck;
-
 #[cfg(feature = "serde-serialize")]
 #[macro_use]
 extern crate serde;
 
-#[cfg(feature = "abomonation-serialize")]
-extern crate abomonation;
-
-#[cfg(feature = "mint")]
-extern crate mint;
+#[cfg(feature = "rand-no-std")]
+extern crate rand_package as rand;
 
 #[macro_use]
 extern crate approx;
-#[cfg(feature = "std")]
-extern crate matrixmultiply;
 extern crate num_traits as num;
-#[cfg(feature = "std")]
-extern crate rand_distr;
 
 #[cfg(all(feature = "alloc", not(feature = "std")))]
 extern crate alloc;