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8/8/2019 Fort Ran Compiling
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Introduction to Fortran
and Fortran Compiling
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Outline
Surfing www.mcsr.olemiss.edu website
Logging into the system via ssh
B
asic Structure and Syntaxo
fF
ortran A quick glance on PICO editor
More detailed look on compilers andcompiling commands
Application of Fortran Compiling
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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: UserNameClick Connect.
Logging into the system from Unix: Start the Terminal:
Finder Utilities Terminal Type the following command:
ssh UserName@HostNameEnter 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 onthe SSH Secure Shell 3.1 link.
If you are a Unix user, ssh will come with the operating system
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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
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The PICO Editor
General Command 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] for 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
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More detailed look into Compilers and
Compiling commands
Fortran Compilers at UM/MCSR: 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
Suns Forte f90 on willow
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Sweetgum
MIPSPro Fortran Compilers, version 7.4
To compile with f77 on sweetgum, enter:
f77 filename.for
To compile with f90 on sweetgum, enter: f90 filename.for
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Mimosa
Portland Group and MPICH Fortran compilers
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
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Redwood
Intel Fortran Compilers(7.1, 8.0 and 9.0)
Before using the Fortran Compiler on redwood, you mustfirst 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
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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 toload, then load it. Before you can use the module command, you mustsource 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 namesof the m
odules and the c
ompiler versi
ons theycorrespond 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
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Willow
Suns Forte f90 To compile with f90, enter:
f90 filename.for
If there are no compilation errors this creates an executable filecalled 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 filecalled a.out. To execute the Fortran program, enter: ./a.out.
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More about Compiling Commands
If there are no compilation errors, thepreviously mentioned Fortran Commandscreate an executable file called a.out. To
execute the Fortran program, enter:./a.out.
To create an executable file with anotherfilename, use the o flag, for example:
f90 o
exefilename filename.for
For more information about Fortrancompilers, Go to: www.mcsr.olemiss.edu
SoftwareFortran
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How to run a compiled files
The compiling commands createan executable file known as
a.out unless specified otherwise.
To execute your program, type:
./a.out and press Enter.
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MCSRFortran Compilers
MCSR's Fortran compilers and platformsare available for instructional or researchuse for all students, faculty, and staffofM
ississippi's eight public universities.Users should decide which compiler is bestsuited for their application. Compilers onSUN are for fast jobs with a quick turnaround, while compilers on sweetgum andmagnolia are designed for larger, morecomputationally intensive jobs.
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MCSRAccounts
MCSR is pleased to provide free computeraccounts on redwood, sweetgum, and mimosa forany student, faculty, or research staff member atany ofMississippi's 8 publicly funded universities.
If you can't access an existing account, please e-mail [email protected] or call one of theconsultants at 662-915-7206. You may request apassword reset from the MCSR Online AccountManager.