Can you code up an example? I'm not sure how to do that. On Tue, Nov 6, 2012 at 11:11 AM, Clinton Stimpson <[email protected]> wrote: > > On Tuesday, November 06, 2012 11:06:45 AM Robert Dailey wrote: >> I use ${CMAKE_COMMAND} -E copy_if_different to copy DLL files to my >> binary output directory. The custom target runs this command about >> 50-100 times (for that many files). >> >> I notice that when all files are already copied, the commands still >> run extremely slowly. It takes just as long to copy all the files as >> it does to copy none of them. >> >> I used the Sysinternals tool called Process Monitor to see what CMake >> is doing as it runs copy_if_different. It's opening the full file and >> seems to be comparing actual contents instead of something simple, >> such as timestamp. >> >> I do not need such a thorough check, I simply want the check to see >> which timestamp is higher and copy if the source is newer than the >> target. >> >> Any reason why copy_if_different is so slow? Is my assumption correct? >> How can I make it faster? > > How about using plain "cmake -E copy ..." and rely on the timestamp check done > by a custom command (add_custom_command()). > You need to make sure the input/ouput parts of the custom command are set > correctly so it can do a timestamp check. > > -- > Clinton Stimpson > Elemental Technologies, Inc > Computational Simulation Software, LLC > www.csimsoft.com > -- > > Powered by www.kitware.com > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > Please keep messages on-topic and check the CMake FAQ at: > http://www.cmake.org/Wiki/CMake_FAQ > > Follow this link to subscribe/unsubscribe: > http://www.cmake.org/mailman/listinfo/cmake --
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