Welcome to MCNPX, Version 2.5.
-------------------------------

Construction of this version of MCNPX is totally 
controlled by the 'autoconf' utility. This means that
you must run the 'configure' script prior to running
the 'make' program (described below). The configure
script determines the hardware type in use and
searches for FORTRAN and C compilers and 
their associated libraries. The 'configure' script also
accepts a variety of arguments and options that
allow you to control the outcome of the configure.

Running configure generates the various Makefile files 
with appropriate contents for the hardware and software
platform in use. Once the Makefile files exist, you may 
then execute the 'make'program.

The MCNPX system relies on the GNU implementation
of the 'make' program. On many platforms, this is
invoked by 'gmake'. Occasionally, as under LINUX,
'make' invokes the GNU version. To examine the 
version of make on your system, execute the following
commands:

make --version
gmake --version

Use the command that allows and understands the --version option.

To see instructions for configuring and building the 
MCNPX code and the standard Tests see the page "INSTALL.html"

For all unix systems, you can configure simply with ../configure

The default configure commands for some systems are shown below:
Sun-Solaris: ../configure --with-FC=f90 --with-CC=cc
Intel-Linux: ../configure --with-FC=pgf90 --with-CC=pgcc
Alpha-Tru64: ../configure --with-FC=f90 --with-CC=cc
SGI-IRIX: ../configure --with-FC=f90 --with-CC=cc
HP-HPUX: ../configure --with-FC=f90 --with-CC=cc
IBM-AIX: ../configure --with-FC=xlf --with-CC=cc