Simplified uniform GPU selection in CMake

[alexxy/gromacs.git] / docs / release-notes / 2021 / major / miscellaneous.rst

diff --git a/docs/release-notes/2021/major/miscellaneous.rst b/docs/release-notes/2021/major/miscellaneous.rst
index 6ba62406737035db80ae73e6ff9ed910ed9403cf..fa547d418613db446f61a9c4c2096e5d547ec22b 100644 (file)
--- a/docs/release-notes/2021/major/miscellaneous.rst
+++ b/docs/release-notes/2021/major/miscellaneous.rst
@@ -7,9 +7,21 @@ Miscellaneous
    Also, please use the syntax :issue:`number` to reference issues on GitLab, without the
    a space between the colon and number!
 
+Uniform and manual CMake GPU-support configuration
+""""""""""""""""""""""""""""""""""""""""""""""""""
+The GPU accelerations setup has been changed to be uniform for CUDA and OpenCL. Either
+option is now enabled by setting GMX_GPU to CUDA or OpenCL in the CMake configuration.
+To simplify the CMake code, we have also moved away from automated option selection
+based on the build host. In particular, this means that CUDA will not be enabled unless
+the GMX_GPU option is explicitly enabled, and CMake will no longer perform the extra
+steps of trying to detect hardware and propose to install CUDA if hardware is available.
+Apart from the simplification, this should also make it easier to handle multiple
+different accelerator APIs targeting e.g. NVIDIA hardware.
+
 Configuration-time trivalue options changed from autodetection to boolean on/off
 """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
 To simplify the CMake configuration and avoid having multiple settings that
 change outside of the users direct control we have removed the support for
 automatically setting booleans. GMX_BUILD_HELP and GMX_HWLOC are now
 disabled by default, while GMX_LOAD_PLUGINS is enabled by default.
+