The following ports are currently installed:
  bzip2 @1.0.6_0 (active)
  cctools @921_1+llvm70
  cctools @921_2+llvm70 (active)
  fftw-3 @3.3.8_0 (active)
  gcc8 @8.3.0_0
  gcc8 @8.3.0_4 (active)
  gcc_select @0.1_8 (active)
  gettext @0.19.8.1_0
  gettext @0.19.8.1_2 (active)
  gmp @6.1.2_1 (active)
  gsl @2.5_1 (active)
  hdf5 @1.10.5_0+cxx+fortran+gfortran+hl (active)
  hwloc @1.11.8_0 (active)
  icu @58.2_2 (active)
  isl @0.20_0
  isl @0.21_0 (active)
  jpeg @9c_0 (active)
  ld64 @3_1+ld64_xcode (active)
  ld64-xcode @2_1 (active)
  libcxx @5.0.1_4 (active)
  libedit @20181209-3.1_0
  libedit @20190324-3.1_0 (active)
  libffi @3.2.1_0 (active)
  libgcc @1.0_0
  libgcc @2.0_1 (active)
  libgcc8 @8.3.0_0
  libgcc8 @8.3.0_5 (active)
  libgcc9 @9.1.0_1
  libgcc9 @9.1.0_2 (active)
  libiconv @1.15_0
  libiconv @1.16_0 (active)
  libmpc @1.1.0_1 (active)
  libxml2 @2.9.9_0
  libxml2 @2.9.9_1 (active)
  llvm-7.0 @7.0.1_1 (active)
  llvm_select @2_0 (active)
  mpfr @4.0.2_0 (active)
  mpi-doc @3.3_0 (active)
  mpi_select @0.0_3 (active)
  ncurses @6.1_0 (active)
  openmpi @3.0.0_0
  openmpi @4.0.1_0 (active)
  openmpi-default @3.0.0_0+gcc8
  openmpi-default @4.0.1_0+gcc8 (active)
  openssl @1.0.2r_0
  openssl @1.0.2s_0 (active)
  pkgconfig @0.29.2_0 (active)
  xar @1.6.1_0 (active)
  xz @5.2.4_0 (active)
  zlib @1.2.11_0 (active)