On Mar 6, 2012, at 9:45 PM, Bill Hoffman wrote: > On 3/6/2012 9:09 PM, Clifford Yapp wrote: >> We use the same configuration tests on all platforms in an effort to >> avoid having large chunks of platform-specific code in our build files, >> but we pay a price for this on Windows - the same test process is more >> than an order of magnitude slower with MSVC than (say) Linux. >> >> Does CMake launch the MSVC C++ compiler each time it needs to do a >> TRY_COMPILE or similar test? If so, does anybody know of any techniques >> for combining tests or some way to run a cl.exe instance as a "daemon" >> to which multiple files can be fed without needing a full restart of cl.exe? >> > No, good way to do this on windows. The best you can do is to make sure it > tries the windows stuff first, and that you remove as many try-compiles as > possible when on Windows. Not only does CMake launch cl.exe, but it will > also launch devenv.com with command line build arguments.... :) It is the > only way to make sure that the compile environments are exact. So, you can > optimize a build for windows with a bit of work, but there is nothing easy to > do from CMake to make this faster. > > -Bill >
I also face the same issue with my own projects. I would be interested in hearing some techniques to speed this up straight from the CMake experts. --- Mike Jackson www.bluequartz.net -- 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
