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 19.1.
NOTE: Intel® Parallel Studio XE 2020 Composer Edition for Fortran and C++ Linux* contains an update to the Intel® C++ Compiler next generation code generator. This is invoked using the -qnextgen option to the ICC and ICPC compilers. This update to the Intel® C++ Compiler next generation code generator includes our latest updates and features for our C++ next generation compiler invoked with the -qnextgen option.
Note: Advanced optimization options or very large programs may require additional resources such as memory or disk space.
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.
Intel® Parallel Studio XE 2020: Getting Started with the Intel® Fortran Compiler 19.1 for macOS* at <install-dir>/documentation_2020/en/compiler_f/ps2020/get_started_mf.htm contains information on how to use the Intel® Fortran Compiler from the command line and from Xcode*.
This article explains which version of Xcode* is supported by Intel Fortran Compiler release.
Product documentation is linked from
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 and from Download Documentation.
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 are based GNU* GDB. Please see Intel® Parallel Studio 2020 Composer Edition Fortran - Debug Solutions Release Notes for further information.
Product samples are now available online at Intel® Software Product Samples and Tutorials
Refer to the Redistributable Libraries for Intel® Parallel Studio XE for more information.
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.
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 19.1. Exceptions include:
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.
Please refer to the compiler documentation for details. Following new compiler options added:
For a list of deprecated compiler options, see the Compiler Options section of the documentation.
Determines the value of the RECL= specifier on an INQUIRE statement for an unconnected unit or a unit connected for stream access.
Determines the format of a floating-point zero produced by list-directed output. old_ldout_zero uses exponential format, no_old_ldout_zero uses fractional format.
Determines whether standard conformance checking occurs when user defined derived type input/output procedures are executed.-m[no-]branches-within-32B-boundaries
The compiler option -stand f15 will be removed in next update. Use -stand f18 instead.
GNU* DBG support will be removed in the next update.
The Loop Profiler feature is removed in Intel® Fortran Compiler 19.1. The following compiler options related to Loop Profiler are removed: -profile-loops=keyword, -profile-loops-report=value -profile-functions, -guide-profile.
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.
Xcode integration capabilities within our Fortran Compiler bundle have been removed. Command line interface remains fully functional for macOS.
Keep in mind that installation of Xcode is still recommended, as command line tools from Xcode are required by the command line compiler. However, you can install just the Xcode Command Line Tools with this command from a terminal window:
The license checkout performance on macOS Catalina 10.15 is roughly 1.1 seconds per source file. This is a 10x slowdown on this OS compared to previous versions of macOS. We are evaluating our license technology for a solution but at this time we have not root caused the issue. If this slowdown is an issue, please revert back to the previous macOS 10.14 where this slowdown does not occur.
macOS*’s XCode 10 and 11 come 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. Please switch to “Legacy Build System” in Project Settings to build your Fortran project in Xcode.
For more details please find this article.
Keep in mind, support for Xcode Integration is deprecated and will be removed in a future update - SEE THIS NOTE
The Intel® Fortran Compiler supports full Fortran 2008 standard and most features from the Fortran 2018 standard. New Fortran 2018 features supported by the current version are listed in the 'New features from Fortran 2018' section.
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Please consult the licenses included in the distribution for details.
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For more complete information about compiler optimizations, see our Optimization Notice.
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