Link to hidapi on non-Linux systems

According to the hidapi README [0], only Linux provides two different
hidapi backends.  Therefore this patch changes the build script to
default to linking to hidapi on non-Linux systems.

This patch fixes the macOS build issue reported by Philippe Normand and
is based on the patch proposed by Philippe Normand at [1].

[0] https://github.com/signal11/hidapi/blob/master/README.txt
[1] https://github.com/d-e-s-o/nitrocli/pull/42

2 files changed, 8 insertions, 1 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 492afa0..26f88a8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 # Unreleased
 - Use the -std=c++14 compiler flag.
+- Change the build script to link to `-lhidapi` on non-Linux operating systems
+  (while still using `-lhidapi-libusb` on Linux).
 
 # v3.4.1 (2018-12-10)
 
diff --git a/build.rs b/build.rs
index 38950d3..c52bf34 100644
--- a/build.rs
+++ b/build.rs
@@ -101,5 +101,10 @@ fn main() {
         .file(version_source)
         .compile("libnitrokey.a");
 
-    println!("cargo:rustc-link-lib=hidapi-libusb");
+    let hidapi_library_name = if cfg!(target_os = "linux") {
+        "hidapi-libusb"
+    } else {
+        "hidapi"
+    };
+    println!("cargo:rustc-link-lib={}", hidapi_library_name);
 }