On 08/14/2012 01:18 PM, Peng Yu wrote: >> CMake really leaves the decision when to recompile something to the >> backend, i.e. GNU Make, Xcode, Visual Studio, ninja etc. It merely >> defines dependencies and then lets the actual build tool handle the >> rest, and most of them choose to use simple time-stamps instead of > > Although GNU Make natively does not support build on content change, > it can be hijacked using the trick in the link that I mentioned. I > think that it is not impossible to do so in cmake at the language > level. But it is better if cmake can support this natively.
Again, using ccache solves this much more elegantly. And calling md5sum twice is also not very nice... > > Yes this is a feature request not a bug report. (To J Decker) Well, if you have the time, I'm pretty sure that the CMake developers would happily review your patch implementing this feature. > > This feature is available to scons. And I think it is reasonable to > expect cmake also have it. I seems that people here did think about it > seriously before, which is a surprise to me. Yes, but scons is monolithic. It doesn't have the backend build-system from the front end and hence doesn't have to ensure that GNU Make behaves consistently with what Xcode, Visual Studio, ninja etc. do. Michael -- 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
