Intel® Fortran Compilers

Performance without compromise on Windows*, Linux* and OS X*

  • Broad support for current and previous Fortran standards, plus popular extensions
  • Intel® Math Kernel Library included in suites
  • Optional Rogue Wave* IMSL* Fortran Numerical Library on Windows

Try & Buy Intel® Fortran Compiler in:

Intel® Parallel Studio XE

A complete Fortran development environment for Windows*

  • Works with Microsoft* Visual Studio* 2010, 2012 and 2013
  • Don't have Visual Studio? No problem - a Fortran development environment based on Microsoft Visual Studio 2010 Shell is included - nothing else to buy!
  • Develop, build, debug and run from the familiar Visual Studio IDE, or build and run from the command line - your choice!
  • 32-bit and 64-bit development included - no extra charge!
  • Create traditional console applications or advanced graphical interfaces with QuickWin, OpenGL* and Windows API support
  • COM (Component Object Model) and .NET interoperability provided
  • Build mixed-language applications with C++, Visual Basic*, Microsoft C# and more! (requires Microsoft Visual Studio)
  • Tens of thousands of declarations of routines, types and constants for Windows API, OpenGL, POSIX, dialogs, multi-byte character support and more!

Intel Fortran integration into Microsoft Visual Studio

  1. Fortran project and source files in Visual Studio
  2. Fortran-aware text editor with context-sensitive help, Go To Definition, templates, coloring and more
  3. Debug Fortran code with full access to Fortran types and arrays
  4. Build and debug mixed-language programs in a single Visual Studio solution
  5. Set breakpoints at Fortran source lines, with optional conditions


Broad support for current and previous Fortran standards, plus popular extensions

  • Full language Fortran 95, full Fortran 2003, plus significant Fortran 2008 features
    • Coarrays
    • DO CONCURRENT
    • 31 array dimensions (standard specifies 15)
    • NEWUNIT in OPEN
    • Much more - see release notes for details
  • Also supports FORTRAN IV (FORTRAN-66), FORTRAN 77 and Fortran 90
  • Extensive OpenMP 4.0* support
  • Source compatible with Compaq Visual Fortran* - most projects just need a rebuild

Performance without compromise

  • Industry leading performance on Intel and AMD* processors.  Take a look at the benchmarks below that were run by Polyhedron* for independent confirmation.


Geomean time in seconds - lower is better
As published 3/10/2014 at http://www.polyhedron.com

  • Extensive optimizations for the latest Intel processors, including Intel® Xeon Phi™ coprocessor
  • Take advantage of multicore, manycore and multiprocessor systems with OpenMP, automatic parallelism, DO CONCURRENT, coarrays and Intel Xeon Phi coprocessor support
  • Patented automatic CPU dispatch feature gets you code optimized for the current running processor

Intel® Math Kernel Library

  • Included in Fortran suites that adds advanced math processing
  • Vectorized and threaded for highest performance on all Intel and compatible processors
  • De facto standard APIs for simple code integration
  • Compatible with all C, C++ and Fortran compilers
  • Royalty-free, per developer licensing for low cost deployment
  • Click here for more information.

Rogue Wave* IMSL* 7 Fortran Numerical Library

  • Optional add-on to the suites that include Intel Visual Fortran compiler
  • Superior accuracy and reliability through 40 years of refinement
  • A comprehensive set of 1000+ algorithms
  • Supporting parallel processing architectures since 1990
  • Evolves easily with software and hardware upgrades
  • Click here for more information and pricing

Outstanding support

  • One year of support included with purchase – gives you access to all product updates and new versions released in the support period plus access to Intel® Premier Support
  • Active user forums for help from experienced users and Intel engineers

Works with your familiar development environment

  • Uses gcc tools, including gdb debugger
  • Link compatible with C and C++ from gcc
  • 32-bit and 64-bit compilers included – no extra charge!

Broad support for current and previous Fortran standards, plus popular extensions

  • Full language Fortran 95, Full Fortran 2003, plus significant Fortran 2008 features
    • Coarrays
    • DO CONCURRENT
    • 31 array dimensions (standard specifies 15)
    • NEWUNIT in OPEN
    • BLOCK
    • Much more - see release notes for details
  • Also supports FORTRAN IV (FORTRAN-66), FORTRAN 77 and Fortran 90
  • Extensive OpenMP 4.0* support

Performance without compromise

  • Industry leading performance on Intel and AMD processors. Take a look at the benchmarks below that were run by Polyhedron for independent confirmation.


Geomean time in seconds - lower is better
As published 3/10/2014 at http://www.polyhedron.com

  • Extensive optimizations for the latest Intel processors including Intel® Xeon Phi™ coprocessor
  • Take advantage of multicore, manycore and multiprocessor systems with OpenMP, automatic parallelism, DO CONCURRENT, coarrays and Intel Xeon Phi coprocessor support
  • Patented automatic CPU dispatch feature gets you code optimized for the current running processor

Intel® Math Kernel Library

  • Included in Fortran suites that adds advanced math processing
  • Vectorized and threaded for highest performance on all Intel and compatible processors
  • De facto standard APIs for simple code integration
  • Compatible with all C, C++ and Fortran compilers
  • Royalty-free, per developer licensing for low cost deployment
  • Click here for more information

Outstanding support

  • One year of support included with purchase – gives you access to all product updates and new versions released in the support period plus access to Intel® Premier Support
  • Active user forums for help from experienced users and Intel engineers

Works with your familiar development environment

  • Build from command line or use Xcode integration (limited feature)
  • Link compatible with C and C++ from gcc
  • 32-bit and 64-bit compilers included – no extra charge!

Broad support for current and previous Fortran standards, plus popular extensions

  • Full language Fortran 95, full Fortran 2003, plus significant Fortran 2008 features
    • DO CONCURRENT
    • 31 array dimensions (standard specifies 15)
    • NEWUNIT in OPEN
    • BLOCK
    • Much more - see release notes for details
  • Also supports FORTRAN IV (FORTRAN-66), FORTRAN 77 and Fortran 90
  • Extensive OpenMP 4.0* support

Performance without compromise

  • Industry leading performance
  • Extensive optimizations for the latest Intel processors
  • Take advantage of multicore, manycore and multiprocessor systems with OpenMP, automatic parallelism, DO CONCURRENT
  • Patented automatic CPU dispatch feature gets you code optimized for the current running processor

Intel® Math Kernel Library

  • Vectorized and threaded for highest performance on all Intel and compatible processors
  • De facto standard APIs for simple code integration
  • Compatible with all C, C++ and Fortran compilers
  • Royalty-free, per developer licensing for low cost deployment
  • Included in Intel® Fortran Composer XE
  • Click here for more information

Outstanding support

  • One year of support included with purchase – gives you access to all product updates and new versions released in the support period plus access to Intel® Premier Support
  • Active user forums for help from experienced users and Intel engineers

Videos to help you get started.

  • Introduction to Intel® Visual Fortran in the Microsoft* Visual Studio* Development Environment
  • Optimizing your application with Intel® C++ and Fortran Compilers for Windows* and Linux*

Register for future Webinars


Previously recorded Webinars:

  • Update Now: What’s New in Intel® Compilers and Libraries
  • An Introduction to Intel® Visual Fortran Development on Intel® Xeon Phi™ coprocessor
  • OpenMP 4.0 for SIMD and Affinity Features with Intel® Xeon® Processors and Intel® Xeon Phi™ Coprocessor
  • Learn to be an Intel® Visual Fortran Power User
  • Optimizing and Compilation for Intel® Xeon Phi™ Coprocessor

More Tech Articles

What are PEEL and REMAINDER loops? (Fortran and C vectorization support)
By Martyn Corden (Intel)Posted 10/28/20140
The vectorization component of the optimization report produced by the Intel® Compiler version 15 may contain remarks such as: <Peeled> remark #15301: PEEL LOOP WAS VECTORIZED <Remainder> remark #15301: REMAINDER LOOP WAS VECTORIZED The compiler does its best to create an effi...
Diagnostic 15319: Using NOVECTOR directive
By Devorah H. (Intel)Posted 10/02/20140
Product Version: Intel(R) Visual Fortran Compiler XE 15.0.0.070  Cause: When using NOVECTOR directive in code, the vectorization report generated using Visual Fortran Compiler's optimization and vectorization report options ( -O2 -Qopt-report:2) includes non-vectorized loop instance.  Example:...
Diagnostic 15304: non-vectorizable loop instance
By Devorah H. (Intel)Posted 10/02/20140
Product Version: Intel(R) Visual Fortran Compiler XE 15.0.0.070   Cause: The vectorization report generated using Visual Fortran Compiler's optimization and vectorization report options (-Qvec-report2 -O2) includes non-vectorized loop instance when using the following compiler option (Win OS): ...
Mapping of Intel® MPI Library versions to bundle suites
By Gergana Slavova (Intel)Posted 08/28/20140
Introduction: Mapping the Intel® MPI Library numbers to specific suites and update versions Intel® Parallel Studio XE 2015 Update 1 Cluster Edition (released 26 November 2014) Intel® MPI Library 5.0 Intel® Registration Center Activation Date (yr.mo.day) Windows Version / build Linu...
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Supplemental Documentation

Intel® MKL Sparse BLAS Overview
By Naveen Gv (Intel)Posted 06/25/20120
Sparse BLAS routines can be useful to implement iterative methods for solving large sparse systems of equations or eigenvalue problems
Intel Guide for Developing Multithreaded Applications
By adminPosted 01/16/201224
The Intel® Guide for Developing Multithreaded Applications covers topics ranging from general advice applicable to any multithreading method to usage guidelines for Intel® software products to API-specific issues.
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You can reply to any of the forum topics below by clicking on the title. Please do not include private information such as your email address or product serial number in your posts. If you need to share private information with an Intel employee, they can start a private thread for you.

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Intel Parallel Studio XE 2016 Beta has Started!
By Steve Lionel (Intel)4
The beta test for Intel Parallel Studio XE 2016, including Intel Fortran Compiler XE 16.0, has begun. For more details, a FAQ and a registration link, see Intel® Parallel Studio XE 2016 Beta Major Fortran features supported in this release are: Submodules from Fortran 2008 IMPURE ELEMENTAL from Fortran 2008 "Further Interoperability with C" features from TS29113 (Fortran 2015 draft) For more details see the release notes. Please use Intel Premier Support for any problems you encounter, rather than this forum. If you have questions about Fortran language features, you can ask them in this forum. Please note that the compiler in the initial beta version was built a couple of weeks ago and doesn't include all of the fixes you may have seen described as "fixed in a release later this year". The remainder of this post will be kept updated on "things you should know" about the beta. The current beta includes VS2010 Shell. A beta update will include VS2013 Shell instead. VS2010 Shell wi...
Webinar May 13 - What's New in Intel Fortran 16.0
By Steve Lionel (Intel)8
Wed, May 13, 2015 12:00 PM - 1:00 PM EDT This session will cover new features in the Intel® Fortran compiler version 16, part of Intel® Parallel Studio XE 2016. Topics include new features from Fortran standards, new OpenMP* features and changes for users of Microsoft Visual Studio*. Register here This session will be recorded and the recording made available sometime afterward.
Using . instead of % as a component selector tool for a derived type
By avinashs2
  I accidently used the period operator (.) instead of % as a component selector tool in my Fortran code. This seemed to work perfectly fine with the Intel Parallel XE 2015 compiler. However, I could not find it documented anywhere as being a safe alternative for the % character. Is this a known feature or change to the standard? I personally find it easier to read code with the period operator and would like to adopt this as a standard code-writing practice. Any suggestions or warnings will be welcomed.
PDT question
By Walt Brainerd2
<p>I am trying some new things with Beta 2016 (W8.1, cygwin) and have several things working, including submodules, PDTs, and DTIO ! <p>I have encountered a couple of bugs and ICEs, which I have submitted, but this is a question. <p>I am trying to extend operator (+) and assignment (=) with a PDT. Each seems to work (sort of) but not together. How do I declare the result of the operator extension so that it is compatible with the arguments (other than literal array sizes)? Here is what I have so far (sorry, I have no clue how to format this thing). I am going to try the whole thing again with allocatables, but I think the simpler case should work ??? <pre> $ ifort addmatrix.f90 Intel(R) Visual Fortran Intel(R) 64 Compiler for applications running on Intel(R) 64, Version 16.0 Beta Build 20150326 Copyright (C) 1985-2015 Intel Corporation.  All rights reserved. addmatrix.f90(67): error #6197: An assignment of different structure types is invalid.    c = a + b...
Comments in Namelist Read From Character String Broken
By Jeff L.1
Hi, I am not a Fortran expert by any means but have been searching for a solution to a particular problem that I'm having and have not had any success in finding a solution. Any help or feedback would be much appreciated. I have a Fortran program that receives a character string from an external source (3rd party lib) that contains Namelist inputs. I have been using the READ statement to read the string directly into my namelist variables and all has been working well it seemed. However, recently I came along a use case where comments were embedded in the input string. All namelist inputs before the comment were read in correctly but all namelist inputs after the comment was ignored and the read statement returned a -1. I set up a small program to emulate the behavior and am including an example below. The namelist input string looks like the following: $NLA  a = 1,  ! This is a comment  b = 1, $ ---- Example Program to Emulate Problem --- CHARACTER*255 temp INTEGER(KIND=4) :: a, b,...
BBC Radio - Codes that Changed the World - Fortran
By Steve Lionel (Intel)3
A delightful program from BBC Radio on Fortran. Downloadable for the next three weeks: http://downloads.bbc.co.uk/podcasts/radio4/codes/r4codes_20150406-1400b.mp3
intel fortran DLL is klobbering my SIGINT handler!
By Geoff G.1
Hey guys, I'm doing an integration piece between a Java front-end and a very mathy chunk of fortran we've written. We've got it being loaded and executed properly. The one annoying thing is that I'm using the JVM to subscribe to SIGINT, so I can do some persistence-ee things if the user hits Ctrl + C on one of our command line tools. This works well, except for that if I load the fortran dll after the signal handler was registered with the JVM, the fortran DLL appears to over-write the signal handler I put in with its own. Fortran's default SIGINT handler prints out this: error (200): program aborting due to control-C event Image PC Routine Line Source SOGOV1.dll 6B0B69C8 Unknown Unknown Unknown KERNELBASE.dll 772123C4 Unknown Unknown Unknown KERNEL32.DLL 74E07C04 Unknown Unknown Unknown ntdll.dll 775DB54F Unknown Unknown Unknown ntdll.dll 775DB51...
What does &quot;Service &amp; Support Renewal Pre-expiry&quot; mean
By Tai Q.1
My research group is now considering buying a IVS compiler and install it to one computer. Then I found the cheapest one is: Intel® Parallel Studio XE Composer Edition for Fortran Windows - Named-user Academic (Service & Support Renewal Pre-expiry) [Electronic Delivery] It is only $199. So what does Service & Support Renewal Pre-expiry mean? My group will use it to run some short fortran codes. So any suggestions if we buy this one?
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You can reply to any of the forum topics below by clicking on the title. Please do not include private information such as your email address or product serial number in your posts. If you need to share private information with an Intel employee, they can start a private thread for you.

New topic    Search within this forum     Subscribe to this forum


Intel Parallel Studio XE 2016 Beta has Started!
By Steve Lionel (Intel)2
The beta test for Intel Parallel Studio XE 2016, including Intel Fortran Compiler XE 16.0, has begun. For more details, a FAQ and a registration link, see Intel® Parallel Studio XE 2016 Beta Major Fortran features supported in this release are: Submodules from Fortran 2008 IMPURE ELEMENTAL from Fortran 2008 "Further Interoperability with C" features from TS29113 (Fortran 2015 draft) For more details see the release notes. Please use Intel Premier Support for any problems you encounter, rather than this forum. If you have questions about Fortran language features, you can ask them in this forum. Please note that the compiler in the initial beta version was built a couple of weeks ago and doesn't include all of the fixes you may have seen described as "fixed in a release later this year". The remainder of this post will be kept updated on "things you should know" about the beta.
Webinar May 13 - What's New in Intel Fortran 16.0
By Steve Lionel (Intel)0
Wed, May 13, 2015 12:00 PM - 1:00 PM EDT This session will cover new features in the Intel® Fortran compiler version 16, part of Intel® Parallel Studio XE 2016. Topics include new features from Fortran standards, new OpenMP* features and changes for users of Microsoft Visual Studio*. Register here This session will be recorded and the recording made available sometime afterward.
OS X 10.9 Xcode 5 error ld: library not found for -lcrt1.10.6.o
By Ronald W Green (Intel)0
Environment:  OS X 10.9 (Mavericks) and Xcode 5.0 Command line compilations/links fail with "ld: library not found for -lcrt1.10.6.o" Affected compiler:  Intel Composer XE 2013 Update 1 Root cause:  Xcode 5.0 installation does not install all command line tools (include files, libraries, SDKs) need for the compiler to link user applications.  FIX: Install the Xcode 5.0 "Command Line Tools".  Follow this Knowledge Base article for installation of this package:  http://software.intel.com/en-us/articles/installing-intel-compilers-for-os-x-pre-requisite-xcode-command-line-tools
Compiler Installation and Uninstallation Help, Linux and Mac OS
By Ronald W Green (Intel)7
  Installing the Intel compilers on Linux* and Mac OS* X requires that you install various prerequisite packages. Linux: Read this Help on Installing the Intel Compilers. Mac OS X: Read this article on Xcode and Command Line tools installation (prerequisite for installation and use) We also have an article on Linux Silent or Non-Interactive Installation Here And Mac OS X Silent or Non-Interactive Installation Here Having trouble REMOVING or UNINSTALLING the Intel Linux compilers?  Read this article: http://software.intel.com/en-us/articles/uninstall-intel-compiler-for-linux-when-uninstallsh-is-missing-or-not-functioning NOTE: ARTICLES such as this are not monitored on a regular basis - do NOT ask questions here, your quesiton may go unnoticed.  Please post all questions to the USER FORUM
ld: cannot find -lm
By Ronald W Green (Intel)1
RHEL 6.x, FC14, FC13, FC12, SL6.x, CentOS 6, etc. and possibly other recent distributions: error when using -static or -fast: ld: cannot find -lm See this article: http://software.intel.com/en-us/articles/error-ld-cannot-find-lm/
BBC Radio - Codes that Changed the World - Fortran
By Steve Lionel (Intel)0
A delightful program from BBC Radio on Fortran. Downloadable for the next three weeks: http://downloads.bbc.co.uk/podcasts/radio4/codes/r4codes_20150406-1400b.mp3
-heap-arrays flag - does it work?
By Mark Mackey4
Hi all. If I compile the following program with ifort -m32 -heap-arrays test.f the array in mytest2() is allocated on the heap, but the one in mytest() is not. According to the documentation, the -heap-arrays flag should put all automatic arrays on the heap. Am I misunderstanding the documentation? Is there a way to force the array in mytest to be allocated on the heap instead of on the stack or in static data? Regards, Mark program test implicit none integer i,mytest,mytest2 i=mytest() i=mytest2(100000) stop end function mytest implicit none integer mytest automatic bigarray integer bigarray(100000) integer i,j do i=1,100000 bigarray(i)=i enddo do i=1,100000 j=j+bigarray(i) enddo mytest=j return end function mytest2(isize) implicit none integer mytest2,isize ...
line break in formatted output
By may.ka2
Hi this code write(CSTmp,"(I0)") size(this%RVPEffSize) CSFormat="("//Trim(AdjustL(CSTmp))//"(1X,F20.10))" write(this%ISOutputUnitEff,CSFormat,iostat=ISSubStat,iomsg=CSMsg)& &(this%RVPEffSize(c1),c1=1,size(this%RVPEffSize))is supposed to write the content of "this%RVPEffSize" into a single line of the file. It does so until "size(this%RVPEffSize)" is 51422. For larger sizes, a new line is inserted. Is that intended or a bug or related to the operation system??? Thanks Karl ifort 14, ubuntu 14.04
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