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* Simplify CMake per-source license noticesBrad King2016-09-271-16/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | 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copyright/license notice headers that spell out copyright holder names and years are hard to maintain and often out-of-date or plain wrong.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.
* Check*CompilerFlag: Revert to previous method used to pass flags (#15641)Brad King2015-07-081-4/+4
| | | | | | | | | Since commit v3.3.0-rc1~397^2 (Check*CompilerFlag: Refactor method used to pass flags, 2015-02-24) these check modules pass the flags to the compiler front-end during linking as well as during compilation. This breaks checks for flags like '-x c++' that are meant only for the compilation step. Revert the change and add a test covering a compiler-only flag.
* Check*CompilerFlag: Refactor method used to pass flagsMark Abraham2015-02-241-4/+4
| | | | | | | Refactor the Check*CompilerFlag modules to pass the flags to Check*SourceCompiles using CMAKE_REQUIRED_FLAGS instead of CMAKE_REQUIRED_DEFINITIONS. Both end up being used, but the variable for "FLAGS" is more precise.
* CheckFortranCompilerFlag: Add module to check Fortran flag existenceNicolas Bock2015-02-051-0/+66
Copy the CheckCCompilerFlag module and replace 'C' with 'Fortran'. Also update the common patterns module to match some Fortran compiler messages.