Just a small remark to say this request of "builtin" way to forbid in-source is quite old: https://gitlab.kitware.com/cmake/cmake/issues/6672 which find its origin in: https://cmake.org/Bug/view.php?id=6672
I don't know if the note from that initial discussion are valid nowadays but the fact that: "Code in CMakeLists.txt is not even executed until after the cache is initialized so there would have to be some other way to indicate in the source tree that it should not be built in-source." and the fact that "The cache is initialized before the procedural steps start to run. With cmake-gui or the cmake command-line "-D" option it is even possible to store entries in the cache before CMake even parses CMakeLists.txt" almost implies that this should be done outside CMakeLists.txt That said, I think that I would rather have some obviously visible and fixed place like CMakeInit.json that should be located in the very same directory as the concerned CMakeLists.txt rather than some list of possible places (cmake/, cmake/init, .cmake, etc...). The exact path to CMakeInit.json could be overwritten by some new command line option, like --init-file if for some reason we want a configurable place (may be used in various CI scripts occasion). This file could hold more options than "just forbid in-source" it could indicate a default generator (which may be different from the usual default generator on the concerned platform), some a toolchain. It's usage would be different than the initial cache precisely because it could work before cache is created. Le ven. 9 nov. 2018 à 17:03, Ben Boeckel <ben.boec...@kitware.com> a écrit : > On Fri, Nov 09, 2018 at 07:28:54 -0500, Taylor Holberton wrote: > > A lot of projects that use CMake already have a `./cmake` directory, I > > would think `./cmake/init.json` would fit nicer as opposed to the hidden > > directory. I'm not a fan of hidden directories in software projects > anyway. > > There are also `./CMake` directories. HDF5 uses `./config/cmake`. I > think just claiming a "hidden" directory with exact casing is better. > > --Ben > -- > > 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: > https://cmake.org/mailman/listinfo/cmake-developers > -- Eric
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