[vtk-developers] Plan to make CMake 3.3 and C++11 required
mathieu.westphal at kitware.com
Wed Jan 4 14:36:56 EST 2017
That's awesome ! Thanks for doing that !
On Wed, Jan 4, 2017 at 8:06 PM, Robert Maynard <robert.maynard at kitware.com>
> As we start a new year, it is time to announce that we are planning on
> rolling out a series of updates to VTK that are starting with the update
> of the minimum required CMake version.
> We have chosen CMake 3.3 as the minimum required version for numerous
> the most important of those reasons being:
> - It is the first CMake release that offers C++11 support for all four
> compilers ( GCC / MSVC / Clang / XCode ). 
> - The CMake version is sufficiently new enough that it allows for a
> of the existing CMake infrastructure. The current CMake minimum version
> requires VTK to maintain forks of numerous FindPackages and Modules that
> part of newer CMake versions.
> - Supports HTTPS downloads, with all the official binaries come with
> Allowing for migration of external data to a HTTPS only server.
> Something we
> are going to require in the near future. 
> As mentioned above this year we have a series of upgrades planned to VTK
> require moving the minimum CMake version to 3.3. The most significant
> of these changes to all developers is the requirement of a C++11 capable
> Yes you heard that correct, VTK is going to soon require a C++11 capable
> compiler. To be more exact we are going to require a compiler that
> the significant majority of the C++11 language and runtime additions. The
> versions for each compiler have not been set in stone, but a rough
> would be:
> - GCC 4.8+
> - Clang 3.3+
> - XCode 5.0+
> - MSVC 2013+
> As we progress through the year, I expect a more concrete list of supported
> compilers will be determined and documented.
> Now the roll out for C++11 support is going to happen in multiple stages
> with an initial plan being:
> Stage 1: We require CMake 3.3, upgrade all dashboards, work through
> reported issues with the version bump
> Stage 2: Explicitly enable C++11 compiler flags during CMake
> configuration. Again
> we will have to upgrade/retire dashboards, work through developer
> reported issues.
> Stage 3: Update the VTK Coding Standards for C++11.
> Stage 4: Allow C++11 to be used in VTK ( outside currently permitted usage
> 1 - If you are using a different compiler vendor than one of those listed
> please see if it is currently supported
> ( https://cmake.org/cmake/help/v3.7/manual/cmake-compile-
> features.7.html ).
> If the vendor is not explicitly listed please contact me, so we can
> what options are available.
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