This document provides a summary of new and changed product features and includes notes about features and problems not described in the product documentation.
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Please see the licenses included in the distribution as well as the Disclaimer and Legal Information section of these release notes for details. Please see the following links for information on this release of the Intel® Fortran Compiler 19.0.
Get the Compiler. The Intel® Fortran Compiler is part of Intel® Parallel Studio XE. Try it today for 30 days, and optionally convert to a paid license that includes Priority Support for one year. Students and classroom educators may qualify for a free version of the suite.
Change History
This section highlights important changes from the previous product version and changes in product updates.
Changes in Update 5 (Intel® Fortran Compiler 19.0.5)
- Note: macOS* 10.15 Catalina and Xcode* 11.0 are not supported in this release. Users will see issues with installation of the Intel Compilers for 2019 Update 5 and prior releases, no Xcode 11 integration, and other possible errors due to incompatibility. Users are advised to delay upgrading to macOS* 10.15 and Xcode 11 until we officially support this environment. Support for macOS* 10.15 and Xcode 11 will be provided in a future release.
- Support for Xcode 10.3
- Floating License Server Upgrade required if you upgrade from from 2019 Update 3 or older
- Corrections to reported problems
Changes in Update 4 (Intel® Fortran Compiler 19.0.4)
- Corrections to reported problems
Changes in Update 3 (Intel® Fortran Compiler 19.0.3)
- Xcode* 10.1 support
- Previous compiler versions erroneously permitted a PRIVATE or SEQUENCE statement to appear prior to the declaration of any type parameters in a derive type declaration. Intel® Fortran Compiler 19.0.3 no longer permits this behavior.
- Corrections to reported problems
Changes in Update 2 (Intel® Fortran Compiler 19.0.2)
- Intel® Fortran Compiler 19.0 Update 2 includes functional and security updates. Users should update to the latest version.
Changes in Update 1 (Intel® Fortran Compiler 19.0.1)
- macOS* 10.14 and Xcode* 10 support
- New code names supported by -[a]x, -mtune and -march options
- code names supported : cascadelake, kabylake, coffeelake, amberlake, whiskeylake
- Corrections to reported problems
Changes since Intel® Visual Fortran Compiler 18.0 (New in Intel® Fortran Compiler 19.0.0)
- New -[a]xcannonlake and -mtune=cannonlake options
- -m<feature> support
- -rcd option deprecated
- Corrections to reported problems
System Requirements
- A 64-bit Intel®-based Apple* Mac* system
- 2GB RAM minimum, 4GB RAM recommended
- 4GB free disk space for all features
- One of the following combinations of macOS*, Xcode* and the Xcode SDK:
- macOS* 10.13, 10.14
- Xcode* 9.4, 10.0
- If doing command line development, the Command Line Tools component of Xcode* is required
Note: Advanced optimization options or very large programs may require additional resources such as memory or disk space.
How to install the Intel® Fortran Compiler
Installation instructions are shipped with all Intel® Software Development Products as part of the documentation.
Note that user should have an administrative authorities to install Intel® Fortran Compiler on macOS*.
Please refer to Installation FAQ for more details on installation questions.
How to use the Intel® Fortran Compiler
Intel® Parallel Studio XE 2019: Getting Started with the Intel® Fortran Compiler 19.0 for macOS* at <install-dir>/documentation_2019/en/compiler_f/ps2019/get_started_mf.htm contains information on how to use the Intel® Fortran Compiler from the command line and from Xcode*.
Documentation
Product documentation is linked from <install-dir>/documentation_2019/en/compiler_f/ps2019/get_started_mf.htm.
Offline Core Documentation Removed from the Installed Image
Offline core documentation is removed from the Intel® Parallel Studio XE installed image. The core documentation for the components of Intel® Parallel Studio XE are available at the Intel® Software Documentation Library for viewing online. Offline documentation for older versions is also available from the Intel® Software Development Products Registration Center: Product List > Intel® Parallel Studio XE Documentation.
User and Reference Guides, What's New and Release Notes, Installation Guides
Refer to the Intel® Parallel Studio XE Support – Documentation for additional User and Reference Guides, What’s New and Release Notes, and Installation Guides.
Intel-provided Debug Solutions
Intel®-provided debug solutions are based GNU* GDB. Please see Intel® Parallel Studio 2019 Composer Edition Fortran - Debug Solutions Release Notes for further information.
Samples
Product samples are now available online at Intel® Software Product Samples and Tutorials
Redistributable Libraries
Refer to the Redistributable Libraries for Intel® Parallel Studio XE for more information.
Technical Support
If you did not register your compiler during installation, please do so at the Intel® Software Development Products Registration Center. Registration entitles you to free technical support, product updates and upgrades for the duration of the support term.
For information about how to find Technical Support, Product Updates, User Forums, FAQs, tips and tricks, and other support information, please visit: http://www.intel.com/software/products/support/
Note: If your distributor provides technical support for this product, please contact them for support rather than Intel.
Compatibility
In general, object code and modules compiled with earlier versions of Intel Fortran Compiler for Linux* (8.0 and later) may be used in a build with version 19.0. Exceptions include:
- Sources that use the CLASS keyword to declare polymorphic variables and which were built with a compiler version earlier than 12.0 must be recompiled.
- Objects built with the multi-file interprocedural optimization (-ipo) option must be recompiled with the current version.
- Objects that use the REAL(16), REAL*16, COMPLEX(16) or COMPLEX*32 datatypes and which were compiled with versions earlier than 12.0 must be recompiled.
- Objects built for the Intel® 64 architecture with a compiler version earlier than 10.0 and that have module variables must be recompiled. If non-Fortran sources reference these variables, the external names may need to be changed to remove an incorrect leading underscore.
- Modules that specified an ATTRIBUTES ALIGN directive outside of a derived type and were compiled with versions earlier than 11.0 must be recompiled. The compiler will notify you if this issue is encountered.
- Modules that specified an ATTRIBUTES ALIGN directive inside a derived type declaration cannot be used by compilers older than 13.0.1.
- The implementation of the Fortran 2008 submodules feature required extensive changes to the internal format of binary .mod files. Therefore module files created by the version 16.0 or newer Fortran compiler cannot be used with version 15.0 or older Fortran compilers.
Stack Alignment Change for REAL(16) and COMPLEX(16) Datatypes
In versions prior to 12.0, when a REAL(16) or COMPLEX(16) (REAL*16 or COMPLEX*32) item was passed by value, the stack address was aligned at 4 bytes. For improved performance, the version 12 and later compilers align such items at 16 bytes and expects received arguments to be aligned on 16-byte boundaries. This change is also compatible with gcc.
This change primarily affects compiler-generated calls to library routines that do computations on REAL(16) values, including intrinsics. If you have code compiled with earlier versions and link it with the version 12 libraries, or have an application linked to the shared version of the Intel run-time libraries, it may give incorrect results.
In order to avoid errors, you must recompile all Fortran sources that use the REAL(16) and COMPLEX(16) datatypes if they were compiled by compiler versions earlier than 12.0.
New and Changed Features
The Intel® Fortran Compiler supports all features from the Fortran 2008 standard.
Please refer to the Fortran 2008 Standard (PDF) and the Fortran 2018 Standard (PDF) if necessary.
Intel® Parallel Studio XE 2019 Update 4 requires version 2.9 or higher of the Intel Software License Manager for floating licenses
The Intel® Software License Manager has been updated to version 2.9 for this release. You must upgrade to this version before installing Intel Parallel Studio XE 2019 Update 4 with a floating license. Please refer for more details:
Intel® Software License Manager Download
Intel® Software License Manager Release Notes
Features from Fortran 2018
- Coarray events
- Intrinsic function coshape
- Default accessibility for entities accessed from a module
- Import Enhancements
- All standard proceduress in ISO_C_BINDING other than C_F_POINTER are now PURE
Features from OpenMP*
- User-Defined Reductions from the OpenMP* 4.5 specifications are now supported:
!$omp declare reduction(reduction-identifier: type-list : combiner) [initializer-clause] - The F2008 standard added the BLOCK/ENDBLOCK construct. It is now allowed to use this construct inside an OMP region.
- ASSERT clause for !$OMP SIMD directive
Directs the compiler to assert when the vectorization fails. Similar to deprecated !DIR$ SIMD ASSERT.
For more information, see the compiler documentation or the link to the OpenMP* Specification above.
New and Changed Directives
- New clause for dynamic alignment in the VECTOR directive:
!DIR$ VECTOR DYNAMIC_ALIGN[(POINTER)]
!DIR$ VECTOR NODYNAMIC_ALIGN
The compiler generates a peel loop for the specified pointer. If no pointer is specified, the compiler automatically decides for which pointer to generate aligned loads and stores, or else doesn’t generate a peel loop. With the nodynamic_align clause, the compiler will not generate a peel loop. - New clause for vector length in VECTOR directive:
!DIR$ VECTOR VECTORLENGTH(vl1, vl2, .., vln)
Vectorizer chooses best vector length from the list according to cost model. If all vector lengths from the list are not profitable, the loop remains scalar.
New and Changed Compiler Options
Please refer to the compiler documentation for details
- -m<feature> support
- New -[a]xcannonlake and -mtune=cannonlake options
For a list of deprecated compiler options, see the Compiler Options section of the documentation.
-qopenmp-simd is on by default
-qopenmp-simd option enables OpenMP* SIMD compilation. It is set by default now. In order to disable it please use -qno-openmp-simd- option explicitly.
New -check:shape and -warn:shape options
These switches tell the compiler to produce errors or warnings when shapes of arrays do not match on assignments. This check is done for assignments only (and implicit assignments resulting from an allocate with source= syntax).
Value safe simd options for !$OMP SIMD directive
!$OMP SIMD directive overrides FP value and exception safe settings. Following options introduced in 19.0 Update 1 change that legacy behavior and produce value and exception safe code even for SIMD loops:
- -q[no-]simd-honor-fp-model: Tells the compiler to obey the selected floating-point model when vectorizing SIMD loops
- -q[no-]simd-serialize-fp-reduction: Tells the compiler to serialize floating-point reduction when vectorizing SIMD loops.
Note that these options don't affect auto-vectorization of loops. Please refer to the compiler documentation for more details.
Support Deprecated
Loop Profiler
The Loop Profiler feature is deprecated in the 19.0 compiler and will be removed in future compiler release. The following compiler options related to Loop Profiler are deprecated and will be removed in future compiler release: -profile-loops=keyword, -profile-loops-report=value -profile-functions, -guide-profile.
Support Removed
32-bit applications are no longer supported
Starting with the 19.0 release of the Intel® Fortran Compiler, macOS 32-bit applications are no longer supported.
If you want to compile 32-bit applications, you should use an earlier version of the compiler and Xcode* 9.4 or earlier.
Known Limitations
Xcode* requires explicit acceptance of Intel bundle at startup for integration to be installed
Beginning with Xcode* 6.3.2, the IDE integration for Intel® Parallel Studio XE does not complete installation until the next time Xcode is started after completing the product installation. When Xcode* is started, you will see a dialog:
The dialog is titled “Unexpected code bundles”, and mentions that Xcode found one or more code bundles not provided by Apple. It then has two buttons, one to “Load Bundles” and one to “Skip Bundles”. “Load Bundles” is required to be clicked to complete the Intel Parallel Studio XE IDE integration. Clicking “Skip Bundles” will cause the Intel tools to not be selectable in Xcode*.
Certain uses of OMP THREADPRIVATE with COMMON block name not diagnosed per OpenMP 4.5 rules
The OpenMP* 4.5 rules states that if a threadprivate directive specifying a common block name appears in one program unit, then such a directive must also appear in every other program unit that contains a COMMON statement specifying the same name. It must appear after the last such COMMON statement in the program unit. The Intel Fortran compiler does not properly diagnose this.
For example, the following program does not conform to the OpenMP* 4.5 specification and ifort does not diagnose and issue an error for the COMMON statements following the OMP THREADPRIVATE statement according to the rule above.
PROGRAM ex1
COMMON /common_blk1/x
!$OMP THREADPRIVATE(/common_blk1/)
COMMON /common_blk1/y
COMMON /common_blk1/z
END PROGRAM
Error 'no rule to process file' within Xcode* 10
macOS*’s new XCode 10 comes with a new build system and it is configured as the default. Currently, the Intel Fortran Compiler does not support it. You will see the error 'no rule to process file' when building an Intel Fortran Compiler project within XCode 10. Please switch to “Legacy Build System” in Project Settings to build your Fortran project in Xcode 10.
For more details please find this article.
Fortran 2008 and Fortran 2018 Feature Summary
The Intel® Fortran Compiler now supports all features from the Fortran 2008 standard. The Intel® Fortran Compiler also supports features from the proposed draft Fortran 2018 standard. Additional features will be supported in future releases. Features from the proposed Fortran 2018 standard supported by the current version include:
- Assumed type (TYPE(*))
- Assumed rank (DIMENSION(.))
- Relaxed restrictions on interoperable dummy arguments
- C include file ISO_Fortran_binding.h for use by C code manipulating “C descriptors” used by Fortran
- Coarray events
- Intrinsic function coshape
- Default accessibility for entities accessed from a module
- Import Enhancements
- All standard proceduress in ISO_C_BINDING other than C_F_POINTER are now PURE
Disclaimer and Legal Information
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Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice. Notice revision #20110804 |
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The products described in this document may contain design defects or errors known as errata which may cause the product to deviate from published specifications. Current characterized errata are available on request.
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Copies of documents which have an order number and are referenced in this document, or other Intel literature, may be obtained by calling 1-800-548-4725, or go to: http://www.intel.com/design/literature.htm
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The Intel® Fortran Compiler is provided under Intel’s End User License Agreement (EULA).
Please consult the licenses included in the distribution for details.
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