From f523f532e6ce11cac2c6037715bf0cc0f49edfd4 Mon Sep 17 00:00:00 2001
From: Yoan Lecoq <yoanlecoq.io@gmail.com>
Date: Sun, 3 Feb 2019 15:02:30 +0100
Subject: [PATCH] Update README

---
 README.md | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index d2ea0d0..2b9cbcb 100644
--- a/README.md
+++ b/README.md
@@ -31,10 +31,12 @@ the default `std` feature. Use this in `Cargo.toml`:
 [dependencies.num-traits]
 version = "0.2"
 default-features = false
+# features = ["libm"]    # <--- Uncomment if you wish to use `Float` and `Real`
 ```
 
-The `Float` and `Real` traits are only available when `std` is enabled. The
-`FloatCore` trait is always available.  `MulAdd` and `MulAddAssign` for `f32`
+The `Float` and `Real` traits are only available when either `std` or `libm` is enabled.
+
+The `FloatCore` trait is always available.  `MulAdd` and `MulAddAssign` for `f32`
 and `f64` also require `std`, as do implementations of signed and floating-
 point exponents in `Pow`.