* gnu/packages/rust.scm (rust-cfg-if): New variable.
---
gnu/packages/rust.scm | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/gnu/packages/rust.scm b/gnu/packages/rust.scm
index 910f296b6..365ab4ed4 100644
--- a/gnu/packages/rust.scm
+++ b/gnu/packages/rust.scm
@@ -682,3 +682,26 @@ per-object thread-local storage, unlike the standard
library's
@code{thread_local!} macro which only allows static thread-local
storage.")
(license (list license:asl2.0 license:expat))))
+
+(define-public rust-cfg-if
+ (package
+ (name "rust-cfg-if")
+ (version "0.1.0")
+ (source
+ (origin
+ (method url-fetch)
+ (uri (crate-uri "cfg-if" version))
+ (file-name
+ (string-append name "-" version ".tar.gz"))
+ (sha256
+ (base32
+ "137qikjcal4h75frzcn6mknygqk8vy5bva7w851aydb5gc6pc7ny"))))
+ (build-system cargo-build-system)
+ (home-page "https://github.com/alexcrichton/cfg-if";)
+ (synopsis
+ "Ergonomically define an item depending on a large number of
@code{#[cfg]} parameters")
+ (description
+ "Cfg-if provides a macro to ergonomically define an item depending
+on a large number of @code{#[cfg]} parameters. Structured like an
+if-else chain, the first matching branch is the item that gets emitted.")
+ (license (list license:expat license:asl2.0))))
--
2.11.0
