> gmx -version
##Output##
GROMACS:    gmx, VERSION 5.0.6

GROMACS is written by:
Emile Apol         Rossen Apostolov   Herman J.C. Berendsen Par Bjelkmar
Aldert van Buuren  Rudi van Drunen    Anton Feenstra     Sebastian Fritsch
Gerrit Groenhof    Christoph Junghans Peter Kasson       Carsten Kutzner
Per Larsson        Justin A. Lemkul   Magnus Lundborg    Pieter Meulenhoff
Erik Marklund      Teemu Murtola      Szilard Pall       Sander Pronk
Roland Schulz      Alexey Shvetsov    Michael Shirts     Alfons Sijbers
Peter Tieleman     Christian Wennberg Maarten Wolf
and the project leaders:
Mark Abraham, Berk Hess, Erik Lindahl, and David van der Spoel

Copyright (c) 1991-2000, University of Groningen, The Netherlands.
Copyright (c) 2001-2014, The GROMACS development team at
Uppsala University, Stockholm University and
the Royal Institute of Technology, Sweden.
check out http://www.gromacs.org for more information.

GROMACS is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License
as published by the Free Software Foundation; either version 2.1
of the License, or (at your option) any later version.

GROMACS:      gmx, VERSION 5.0.6
Executable:   /usr/local/gromacs/bin/gmx
Library dir:  /usr/local/gromacs/share/gromacs/top
Command line:
  gmx --version

Gromacs version:    VERSION 5.0.6
Precision:          single
Memory model:       32 bit
MPI library:        thread_mpi
OpenMP support:     enabled
GPU support:        disabled
invsqrt routine:    gmx_software_invsqrt(x)
SIMD instructions:  AVX2_256
FFT library:        fftw-3.3.3-sse2
RDTSCP usage:       enabled
C++11 compilation:  enabled
TNG support:        enabled
Tracing support:    disabled
Built on:           Thu Oct  1 09:51:11 EDT 2015
Built by:           simon@researchBox [CMAKE]
Build OS/arch:      Linux 3.19.0-26-generic i686
Build CPU vendor:   GenuineIntel
Build CPU brand:    Intel(R) Core(TM) i7-4550U CPU @ 1.50GHz
Build CPU family:   6   Model: 69   Stepping: 1
Build CPU features: aes apic avx avx2 clfsh cmov cx8 cx16 f16c fma htt lahf_lm mmx msr nonstop_tsc pcid pclmuldq pdcm pdpe1gb popcnt pse rdrnd rdtscp sse2 sse3 sse4.1 sse4.2 ssse3 tdt x2apic
C compiler:         /usr/bin/cc GNU 4.8.4
C compiler flags:    -march=core-avx2    -Wno-maybe-uninitialized -Wextra -Wno-missing-field-initializers -Wno-sign-compare -Wpointer-arith -Wall -Wno-unused -Wunused-value -Wunused-parameter  -O3 -DNDEBUG -fomit-frame-pointer -funroll-all-loops -fexcess-precision=fast  -Wno-array-bounds
C++ compiler:       /usr/bin/c++ GNU 4.8.4
C++ compiler flags:  -march=core-avx2   -std=c++0x  -Wextra -Wno-missing-field-initializers -Wpointer-arith -Wall -Wno-unused-function  -O3 -DNDEBUG -fomit-frame-pointer -funroll-all-loops -fexcess-precision=fast  -Wno-array-bounds
Boost version:      1.55.0 (internal)