Dual License

Author: termoshtt

LICENSE

@@ -0,0 +1,37 @@
+License of fftw, fftw-sys crates
+================================
+
+`fftw` and `fftw-sys` crates are distributed under dual license based on which backends are linked:
+
+FFTW
+------
+FFTW is free software and distributed under [GNU General Public License version 2 (GPLv2)](https://www.gnu.org/licenses/gpl-2.0.html),
+and FFI codes (`fftw-sys` crate) and Rust binding (`fftw` crate) are also distributed under GPLv2.
+
+Intel MKL
+---------
+Intel Math Kernel Library (MKL) is distributed under the [Intel Simplified Software License](https://software.intel.com/en-us/license/intel-simplified-software-license).
+See also [License FAQ](https://software.intel.com/en-us/mkl/license-faq).
+In this case, both `fftw` and `fftw-sys` are distributed under following MIT-license:
+
+    MIT License
+
+    Copyright (c) 2017-2019 Toshiki Teramura
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.

LICENSE.md

@@ -6,7 +6,7 @@ authors = ["Toshiki Teramura <[email protected]>"]
 description = "unsafe wrapper of FFTW3"
 repository = "https://github.com/termoshtt/rust-fftw3"
 keywords = ["fftw"]
-license = "GPL-2.0"
+license-file = "../LICENSE.md"
 
 [features]
 default = ["source"]

fftw-sys/Cargo.toml

@@ -6,7 +6,7 @@ authors = ["Toshiki Teramura <[email protected]>"]
 description = "safe wrapper of FFTW3"
 repository = "https://github.com/termoshtt/rust-fftw3"
 keywords = ["fftw"]
-license = "MIT"
+license-file = "../LICENSE.md"
 
 [features]
 default = ["source"]