3.8.6 Linux: PGI Compiler

So far, under Linux the compiler of the Portland Group has been used mostly to compile CO5BOLD. It is called with pgf90.

Important switches are:

• -byteswapio: With this flag set, binary files in big_endian format (the standard for UIO files) are automatically transformed to little_endian and vice versa.

• -fast: General optimization flag to choose (close to) optimum optimization for local machine.

• -Mvect=sse: Optimization: Allow Pentium III vector commands.

• -Mcache_align: Optimization: Align some data object on cache-line boundaries.

• -fastsse: From compiler version 4.0 on, this option can be used instead of the three previous ones. It contains and supersedes them.

• -Minline=...: Optimization: Routines that should be inlined:
  file rhd_hyd_module.F90: rhd_hyd_avg, rhd_hyd_upwind, rhd_hyd_pred0, rhd_hyd_predm, rhd_hyd_predp, rhd_hyd_alpha, rhd_hyd_constanteq, rhd_hyd_minmodeq, rhd_hyd_minmod, rhd_hyd_vanleereq, rhd_hyd_vanleer, rhd_hyd_superbeeeq, rhd_hyd_superbee, rhd_hyd_ppeq, rhd_hyd_pp, rhd_hyd_hdflux,
  file rhd_lhdrad_module.F90: rhd_rad3d_raylhd, rhd_rad3d_solve, rhd_rad3d_solveeq,
  file rhd_shortrad_module.F90: rhd_shortrad_operator, rhd_shortrad_dtauop.

• -DMSrad_raytas=2: Optimization: choose non-default version of loop in SUBROUTINE raytas in file MSrad3D.F90. See Sect. 3.7.

• -Drhd_hyd_roe1d_l01=0: Optimization: choose standard set of routines for Roe solver. See Sect. 3.7.

• -Drhd_shortrad_operator_l02=1: Optimization: use the ``manually inlined version'' of the short characteristics operator.

• -Drhd_shortrad_dtauop_l02=1: Optimization: use the ``manually inlined version'' of the optical coupling operator.

Everything compiles. The MSrad radiation transport module does not work with OpenMP activated. In this case it is recommended to use the Intel compiler instead (see Sect. 3.8.7).