My ideal would be something that requires attribution only in source form, but not in compiled/binary/object form.
The Boost Software License has this very feature baked right into it, no modification needed. It is “very similar to the BSD license and the MIT license” (direct quote), but was designed with these very use-cases in mind:
- Must require that the license appear with all copies [including redistributions] of the software source code.
- Must not require that the license appear with executables or other binary uses of the library.
It’s recognized by the Open Source Initiative, and is compatible with the GNU GPL according to the FSF. Like BSD/MIT, it’s reasonably (IMO) brief, consisting only of three paragraphs: a license, a restriction, and a disclaimer:
Boost Software License - Version 1.0 - August 17th, 2003
Permission is hereby granted, free of charge, to any person or organization obtaining a copy of the software and accompanying documentation covered by this license (the "Software") to use, reproduce, display, distribute, execute, and transmit the Software, and to prepare derivative works of the Software, and to permit third-parties to whom the Software is furnished to do so, all subject to the following:
The copyright notices in the Software and this entire statement, including the above license grant, this restriction and the following disclaimer, must be included in all copies of the Software, in whole or in part, and all derivative works of the Software, unless such copies or derivative works are solely in the form of machine-executable object code generated by a source language processor.
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, TITLE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
(StrongEmphasis text mineadded by me.)