The majority of the Colvars module can be built with all major versions of the C++ language. In general, the accepted standard is C++11, which is supported by all major OSes and compilers currently in use. Any future exceptions to this will be listed here, as well as in the "Compilation notes" section of the Colvars doc.
Because Colvars relies on the build system of each engine, there is nothing for you to do, whether you are using a precompiled build or making your own. The only exception to this is VMD, whose build system requires some patching in order to work on modern architectures (details below).
If you are reading this page following an error message from Colvars, you are probably using an earlier version of the code, which at the time was supporting C++11 as an option but not requiring it yet. Consider upgrading your engine and/or Colvars, as you will also get new features and improvements.
We no longer support using extremely old compilers and OSes that are well past their end of life (for example, GCC 4.4 and CentOS 6).
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GROMACS follows the C++17 standard.
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LAMMPS follows the C++11 standard.
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NAMD follows the C++11 standard.
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VMD precompiled builds do not use C++11 yet, and the optional
CXX11flag in VMD'sconfigurescript does not work yet. Please apply thec++11patch from this repository to allow building VMD with C++11 whenever supported.
In theory we could, but due to UIUC's restrictive license we are curently unable to distribute any version of VMD, modified or not. We hope that this restriction is lifted in the future, through the adoption of best practices for research software sharing.