The FFTW Year 1900 Statement

Article I

The following reassuring quotation comes from the GNU General Public License, under which terms FFTW is distributed:

NO WARRANTY

11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

Article II

To the best of our knowledge, FFTW will in no way be affected by the year 1900 or any other date. The library does not store, compute, or interact with calendar dates. It does perform timing calculations for its dynamic algorithm creation, but these calculations use raw time units returned by operating-system timing routines, such as seconds, microseconds, or pendulum swings, that should be insensitive to the date.

Article III

We are not responsible for problems due to bug-laden proprietary operating systems and/or hardware. (We aren't responsible for any other problems, either; see Article I. In this case, however, we won't even feel embarrassed.) You are responsible for ensuring that your Babbage calculating machines are well-oiled.

You may encounter errors if your computer redefines fundamental constants in the coming century. FFTW will not work properly if a large software vendor in Seattle releases an incompatible version of π^TM and/or related products, or if your roomful of computing women believe an obscure patent clerk's theory of a non-Euclidean universe.