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* libarchive: Update to build within CMakeBrad King2020-02-131-0/+4
| | | | | Hard-code more libarchive options as internal cache entries. Doing so makes some of our `IF(0)` conditions unnecessary, so remove those.
* Simplify CMake per-source license noticesBrad King2016-09-271-11/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Per-source copyright/license notice headers that spell out copyright holder names and years are hard to maintain and often out-of-date or plain wrong. Precise contributor information is already maintained automatically by the version control tool. Ultimately it is the receiver of a file who is responsible for determining its licensing status, and per-source notices are merely a convenience. Therefore it is simpler and more accurate for each source to have a generic notice of the license name and references to more detailed information on copyright holders and full license terms. Our `Copyright.txt` file now contains a list of Contributors whose names appeared source-level copyright notices. It also references version control history for more precise information. Therefore we no longer need to spell out the list of Contributors in each source file notice. Replace CMake per-source copyright/license notice headers with a short description of the license and links to `Copyright.txt` and online information available from "https://cmake.org/licensing". The online URL also handles cases of modules being copied out of our source into other projects, so we can drop our notices about replacing links with full license text. Run the `Utilities/Scripts/filter-notices.bash` script to perform the majority of the replacements mechanically. Manually fix up shebang lines and trailing newlines in a few files. Manually update the notices in a few files that the script does not handle.
* cmake: Teach "-E tar" command a "--mtime=" optionBrad King2015-01-191-0/+16
Add an option to set the mtime of entries in a tarball so that one can create a tarball with a consistent content hash (e.g. MD5) for a given set of files regardless of their current timestamps on disk. This will be useful for submission of tarballs to CDash, which tracks content hashes to avoid duplication. Inspired-by: Bill Hoffman <bill.hoffman@kitware.com>