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Development toolchains

Much of the software available on Bessemer was installed using EasyBuild, which is a tool for building and installing software on HPC systems.

EasyBuild groups core sets of dependencies as what it calls toolchains. The three supported toolchains on Bessemer are:

  • foss
    • C, C++ and Fortran compilers: GCC
    • MPI implementation: OpenMPI
    • BLAS and LAPACK implementation: OpenBLAS
    • Parallel, distributed LAPACK implementation: ScaLAPACK
    • Fourier transforms: FFTW
  • fosscuda
    • As per foss
    • Plus CUDA
  • intel

Dependency versions for toolchains

See the EasyBuild documentation for dependency versions for foss and intel

fosscuda-2019a has the same dependencies as foss-2019a plus CUDA 10.1


In addition to the above toolchains there are sub-toolchains corresponding to subsets of the main toolchain dependencies:

  • gompi: GCC + openmpi
  • gompic: GCC + OpenMPI + CUDA
  • gcccuda: GCC + CUDA
  • iccifort: icc + ifort
  • iccifort: icc + ifort
  • iimpi: icc + ifort + impi