introduction to fortran and fortran compiling

More detailed look into Compilers and Compiling commands  MIPSPro Fortran Compilers, version 7.4, on sweetgum  Portland Group and MPICH Fortran compilers on mimosa  Intel Fortran Com

Introduction to Fortran and Fortran Compiling

commands

Logging into the system using ssh

 Logging into the system from Windows:

 Start the secure shell client:

Start->Programs->SSH Secure Shell->Secure Shell Client

 Connect to willow:

From the secure shell window, click Quick Connect

Then, from the Connect to Remote Host pop-up window, enter:

Hostname : HostName

User Name : UserName

Click Connect

 Logging into the system from Unix:

 Start the Terminal:

Finder Utilities  Terminal

 Type the following command:

ssh UserName@HostName

Enter your password

 If you are a windows user and you want to download ssh;

Go to IT Helpdesk @

http://www.olemiss.edu/helpdesk/resources.html#software and click on the SSH Secure Shell 3.1 link.

 If you are a Unix user, ssh will come with the operating system

Simple Fortran Program

c This program adds two numbers and displays the result

program add

double precision a,b,c

write(*,*) 'Input two numbers (include a decimal point)' read (*,*) a,b

c=a+b

write (*,*) 'The sum of the numbers you entered is', c stop

end

The PICO Editor

 Write editor contents to a file [Ctrl] o

 Save the file and exit pico [Ctrl] x

 Spell Check [Ctrl] t

 Justify the text [Ctrl] j

 Moving around in your file

 Move one character to the right [Ctrl] f or right arrow key

 Move one character to the left [Ctrl] b or left arrow key

 Move up one line [Ctrl] p or up arrow key

 Move down one line [Ctrl] n or down arrow key

More detailed look into Compilers and Compiling commands

 MIPSPro Fortran Compilers, version 7.4, on sweetgum

 Portland Group and MPICH Fortran compilers on

mimosa

 Intel Fortran Compilers(7.1, 8.0 and 9.0) on redwood

 GUI g77 on willow

 Sun’s Forte f90 on willow

 f77 filename.for

 f90 filename.for

 To compile with the MPICH Fortran compilers, enter:

 /usr/local/apps/pgi-5.2/linux86/5.2/bin/pgf77 filename.for

 To compile with the PGI SDK compilers, enter:

 / usr/local/apps/pgi-6.1/linux86/6.1/bin/pgf90 filename.for

 Intel Fortran Compilers(7.1, 8.0 and 9.0)

 Before using the Fortran Compiler on redwood, you must first load the appropriate Intel compiler module.

 Then, to compile:

 ifc filename.for if using the 7.1 compiler

 ifort filename.for if using the 8.0 or 9.0 compilers

Loading the appropriate Intel Compiler Module

 Several versions/builds of Intel compilers are available on redwood To compile, you must first pick which compiler version module you want to load, then load it Before you can use the module command, you must source the correct setup file for your shell

 /usr/share/modules/init/sh (if using ssh) (There should be a space between and /opt)

 Then you use the module command:

 module list (to see if any other versions of compiler modules are loaded)

 module purge (to unload any other versions of compiler modules)

 module list (to verify that other versions were successfully unloaded)

 module avail (to see what versions of compiler modules are available to load)

 For example, to load the latest 9.1 version of the F Compilers:

 module load f91

 module list

 These are the names of the modules and the compiler versions they

correspond to:

 intel-compilers.7.1.037 for fortran 7.1

 intel-compilers.8.0.042 for fortran 8.0

 intel-compilers.8.0.046 for fortran 8.0

 intel-compilers.9.0.027 for fortran 9.0

 intel-compilers.9.1.046 for fortran 9.1

Willow

 Sun’s Forte f90

 To compile with f90, enter:

 f90 filename.for

 If there are no compilation errors this creates an executable file called a.out To execute the Fortran program, enter: /a.out.

 GUI g77

 To compile with g77, enter:

 g77 filename.for

 If there are no compilation errors this creates an executable file called a.out To execute the Fortran program, enter: /a.out.

More about Compiling Commands

 If there are no compilation errors, the previously mentioned Fortran Commands create an

executable file called a.out To execute the

Fortran program, enter: /a.out

 To create an executable file with another

filename, use the –o flag, for example:

 f90 –o exefilename filename.for

 For more information about Fortran compilers, Go to:

 www.mcsr.olemiss.edu

How to run a compiled files

an executable file known as

a.out unless specified otherwise.

type: /a.out and press Enter.

MCSR Fortran Compilers

MCSR's Fortran compilers and platforms are

available for instructional or research use for all students, faculty, and staff of Mississippi's eight public universities Users should decide which compiler is best suited for their application

Compilers on SUN are for fast jobs with a quick turn around, while compilers on sweetgum and magnolia are designed for larger, more

computationally intensive jobs

MCSR Accounts

 MCSR is pleased to provide free computer

accounts on redwood, sweetgum, and mimosa for any student, faculty, or research staff member at any of Mississippi's 8 publicly funded universities

 If you can't access an existing account, please e-mail assist@mcsr.olemiss.edu or call one of the consultants at 662-915-7206 You may request a password reset from the MCSR Online Account

Manager