meta-cmake: A collection of cmake helper scripts

The scripts here are used in the MeTA toolkit's build system.

The most useful ones are probably FindLIBCXX.cmake and FindOrBuildICU.cmake.

• FindLIBCXX.cmake is a standard CMake module for finding libc++ and a suitable ABI (libc++abi or libcxxrt). It also provides a macro set_libcxx_required_flags() to set CMAKE_REQUIRED_FLAGS for performing compilation checks using libc++.

• FindOrBuildICU.cmake is used to either locate a suitable ICU library (matching a specified version exactly) or build one using ExternalProject_Add.

• CompilerKludges.cmake provides a macro for setting a bunch of preprocessor variables that are used as workarounds for compiler bugs, standard library bugs, or missing standard library features.

• SetClangOptions.cmake provides a macro that is probably only useful in the context of MeTA.

License

Copyright (c) 2016 Chase Geigle

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.