On 05/28/2014 01:20 PM, Alessandro Di Federico wrote: > Hi, I'm working on a quite big project, namely LLVM. As you can > imagine, launching a `make install` it's quite time consuming, in > particular in Debug builds. However I'm using a smart file system > (BTRFS on Linux) which supports "reflinks", which basically means > that it's possible to create copy-on-write duplicate of a file, without > having to write the file contents again. This can be easily done using > `cp` (from the GNU Coreutils) with the --reflink parameter.
Neat. How is it known when a reflink is safe (e.g. on the same filesystem)? Does it just fall back to a normal copy otherwise? This would likely go in the implementation of the file(INSTALL) command used internally by the installation infrastructure. See SystemTools::CopyFileAlways in Source/kwsys/SystemTools.cxx. That method could probably be optimized anyway. Thanks, -Brad -- Powered by www.kitware.com Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Kitware offers various services to support the CMake community. For more information on each offering, please visit: CMake Support: http://cmake.org/cmake/help/support.html CMake Consulting: http://cmake.org/cmake/help/consulting.html CMake Training Courses: http://cmake.org/cmake/help/training.html Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Follow this link to subscribe/unsubscribe: http://public.kitware.com/cgi-bin/mailman/listinfo/cmake-developers
