The page provides a brief summary of the new features in the Intel® Fortran Compiler and Intel® Fortran Compiler Classic available in the Intel® HPC Toolkit. Also provided is a link to the release notes. The Intel® oneAPI DPC++/C++ Compiler Release Notes are here. The notes are categorized by major version, from newest to oldest, with minor releases listed within each major version.
Click a version to expand it into a summary of new features and changes in that version since its previous release and access to the detailed release notes, which include important information, such as pre-requisites, software compatibility, installation instructions, and known issues.
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Version 2024
2024.1.0
Intel® Fortran Compiler
- Intel® Fortran Compiler adds more Fortran 23 language features - improving compatibility and interoperability between C and Fortran code in the intrinsic module ISO_C_BINDING; simplifying trigonometric calculations by allowing developers to use intrinsic functions that accept arguments as degrees, enhancing ease of use and code readability; use of predefined data types of specific sizes in intrinsic module ISO_FORTRAN_ENV improving code portability and ensuring consistent behavior, and more.
- Intel® Fortran Compiler makes OpenMP Offload programming more productive by adding runtimes checks ensuring that mapped data is currently allocated/associated.
- Increased compiler stability by fixing miscellaneous compilation, OpenMP and runtime issues.
Intel® Fortran Compiler Classic
- The Intel® Fortran Compiler Classic has been updated to include recent versions of 3rd party components, which include functional and security updates.
NOTE Intel® Fortran Compiler Classic (ifort) is now deprecated and will be discontinued in late 2024. Intel recommends that customers transition now to using the LLVM-based Intel® Fortran Compiler (ifx) for continued Windows* and Linux* support, new language support, new language features, and optimizations. For more information on ifx, see the Intel® Fortran Compiler Developer Guide and Reference and the Porting Guide for ifort Users to ifx.
2024.0.2
These compilers are available in the Intel® HPC Toolkit 2024.0.1.
Overview
Intel® Fortran Compiler (ifx) version 2024.0.2
- Bug fixes
- Includes bug fixes in 2024.0.1
Intel® Fortran Compiler Classic (ifort) version 2021.11.1
- A deprecation message is added to the ifort command.
NOTE Intel® Fortran Compiler Classic (ifort) is now deprecated and will be discontinued in late 2024. Intel recommends that customers transition now to using the LLVM-based Intel® Fortran Compiler (ifx) for continued Windows* and Linux* support, new language support, new language features, and optimizations. For more information on ifx, see the Intel® Fortran Compiler Developer Guide and Reference and the Porting Guide for ifort Users to ifx.
2024.0.0
These compilers are available in the Intel® HPC Toolkit 2024.0.
Overview
Intel® Fortran Compiler (ifx) version 2024.0.0
- Intel® Fortran Compiler significantly improves productivity by adding popular LLVM sanitizers allowing developers to catch Fortran, OpenMP, OpenMP offload address, memory leak, uninitialized memory, thread data races, deadlocks and undefined behavior on CPU.
- Intel® Fortran Compiler adds initial Fortran 2023 standards support and enhances OpenMP 5.0, 5.1, 5.2 and 6.0 target features for Intel GPUs.
Intel® Fortran Compiler Classic (ifort) version 2021.11.0
- The Intel® Fortran Compiler Classic has been updated to include recent versions of 3rd party components, which include functional and security updates.
oneAPI 2023
These compilers are available in the Intel® oneAPI HPC Toolkit 2023.2.
Overview
Intel Fortran Compiler (ifx) version 2023.2
- The Intel® Fortran Compiler now supports the Fortran 2023 REDUCTION locality-spec on the DO CONCURRENT construct. With compiler option [qQ]openmp, the compiler will parallelize the DO CONCURRENT construct. Add [fQ]fopenmp-targets=<device> to offload to an Intel GPU.
- The ifx compiler option -check uninit improves correctness and reliability of Fortran applications by detecting errors related to uninitialized variables using the LLVM Memory Sanitizer.
- The compiler provides enhanced OpenMP 5.1/5.2 standards compliance by implementing order clause modifiers, allocators and dispatch constructs.
- ALLOCATORS directive
Specifies memory allocators to be used to allocate variables in the associated Fortran ALLOCATE statement and to use in
their deallocation. - TILE directive
Tiles (or blocks) one or more loops of a loop-nest. - Optional END DISPATCH directive on the DISPATCH construct
- END construct directives are now optional on OpenMP constructs that contain only a strictly-structured-block (a Fortran BLOCK construct).
- ALLOCATORS directive
Intel Fortran Compiler Classic (ifort) version 2021.10.0
- The Intel® Fortran Compiler Classic has been updated to include recent versions of 3rd party components, which include functional and security updates. Also, bug fixes for the Fortran Language.
Overview
Intel Fortran Compiler (ifx) version 2023.1.0
- ifx is now fully compliant with Fortran 2018, and it has feature parity with ifort.
- New OpenMP 5.1 Features
- Iterators are now supported in the DEPEND clause.
- Optional END construct directives are now supported with strictly structured block construct bodies.
- ASSUMES directive
- Provides hints to the optimizer about the current compilation unit and all the code it can reach through procedure calls.
- ERROR directive
- Causes the compiler or runtime system to process an error condition.
- NOTHING directive
- Provides documentary clarity in conditionally compiled code or conditional OpenMP code. It has no effect on the semantics or execution of the program.
- New clauses LINK and INDIRECT for directive DECLARE TARGET
- The LINK clause maps the list items for specific device executions, supporting functions called in a TARGET region that refer to the list items. The INDIRECT clause determines whether procedures specified in an ENTER clause can be called by an indirect device invocation.
- Iterators are now supported in the DEPEND clause.
Intel Fortran Compiler Classic (ifort) version 2021.9.0
- The Intel® Fortran Compiler Classic has been updated to include recent versions of 3rd party components, which include functional and security updates. Also, bug fixes for the Fortran Language.
These compilers are available in the Intel® oneAPI HPC Toolkit 2023.0.0.
Overview
Intel Fortran Compiler Classic (ifort) version 2021.8.0
- The Intel® Fortran Compiler Classic has been updated to include recent versions of 3rd party components, which include functional and security updates. Also, bug fixes for the Fortran Language.
Intel Fortran Compiler (ifx) version 2023.0.0
- Intel Fortran Compiler, based on modern LLVM technology, now has up to Fortran 2018 full language standards support, including Coarrays eliminating the need for external APIs such as MPI or OpenMP. To easily express offload parallelism the compiler adds DO CONCURRENT GPU offload support.
- Intel® Fortran Compiler adds support for 4th Gen Intel® Xeon® Scalable Processor (formerly Sapphire Rapids), and Intel® Data Center GPU MAX Series (formerly Ponte Vecchio).
- Intel Fortran Compiler enhances OpenMP 5.0, 5.1 compliance, focusing much of that on offloading, and improved performance.
- Developers are now able to source-level debug optimized code.
- Intel® Fortran Compiler has feature parity with Intel® Fortran Compiler Classic.
oneAPI 2022
These compilers are available in the Intel® oneAPI HPC Toolkit 2022.3.1.
- Intel® Fortran Compiler 2022.2.1 has been updated to include functional and security updates. Users should update to the latest version as it becomes available.
- Intel® Fortran Compiler Classic 2021.7.1 has been updated to include functional and security updates. Users should update to the latest version as it becomes available.
These compilers are available in the Intel® oneAPI HPC Toolkit 2022.3.
Overview
ifort version 2021.7.0
- Fortran language fixes and security updates
ifx version 2022.2.0
- The following ifort and Fortran 2018 features are now available for ifx
• DLLIMPORT/DLLEXPORT support
Allows creating and using dynamic libraries in the Windows environment (ifort compatibility)
• Fortran 2018 coarray features and coarrays with allocatable fields
Coarrays, including Fortran 2018 teams and events, are now fully supported. (F2008 and F2018 support)
• Fortran 2018 C interoperability support
All C interoperability features, including assumed rank arrays and C array descriptors, are now supported. (F2018 support) -
Additional New Features
• !DIR$ ASSUME support
The !DIR$ ASSUME directive is now supported by ifx for the -check and -assume options. (ifort compatibility)
• !DIR$ vector [no]vecremainder
Vectorization is now enabled/disabled by using !DIR$ vector [no]vecremainder. For additional performance add !$omp simd. (ifort compatibility)
• OpenMP SIMD IF clause is now supported. -
New Compiler Options for ifx
• -check bounds support
ifx now supports array bounds checking. (ifort compatibility)
• -init command line switch
Allows classes of variables to be initialized to zero or IEEE exceptional values. (ifort compatibility)
• Dynamic COMMON support
The -dyncom (Linux) or /Qdyncom (Windows) command line switch allows COMMON blocks to be allocated dynamically instead of statically. (ifort compatibility)
• DO CONCURRENT offload support (ifx only)
-fopenmp-[no]-target-do-concurrent (Linux) or /Qopenmp-[no]-target-do-concurrent (Windows) causes the compiler to generate offload code for DO CONCURRENT constructs. The default varies: if option fopenmp-targets (Qopenmp-targets) is specified the default is ON, otherwise it is OFF. This option is available only in ifx. -
The following new OpenMP 5.1 features are available for ifx
• UNROLL construct
Partially or fully unrolls a DO loop.
• PRESENT as a map-type modifier in a MAP clause
You can now specify PRESENT as a map-type modifier in a MAP clause.
• SCAN directive (previously in ifort)
Allows vectorization of inclusive/exclusive scan operations in SIMD loops.
• TASK modifier and the REDUCTION clause
The TASK modifier is now supported on the REDUCTION clause.
• FILTER clause on the MASKED construct
The FILTER clause is now supported on the MASKED construct.
- Corrections to reported problems
These compilers are available in the Intel® oneAPI HPC Toolkit 2022.2.
Overview
ifort version 2021.6.0
- Fortran language fixes and security updates
ifx version 2022.1.0
- All of Fortran 2003 Standard is implemented including parameterized derived types
- All of Fortran 2008 Standard is implemented with the exception of coarrays
- Corrections to reported problems
These compilers are available in the Intel® oneAPI HPC Toolkit 2022.1.
Overview
ifort version 2021.5.0
- Fortran language fixes and security updates
ifx version 2022.0.0
- All of Fortran 2003 Standard is implemented with the exception of parameterized derived types
- All of Fortran 2008 Standard is implemented with the exception of coarrays
- Corrections to reported problems
oneAPI 2021
These compilers are available in the Intel® oneAPI HPC Toolkit.
Overview
- Corrections to reported problems
- Newly implemented Fortran features
- BLOCK construct
- Intrinsic EXECUTE_COMMAND_LINE
- The BACK argument in MAXLOC/MINLOC intrinsics
- Intrinsic FIND_LOC
- Variable expressions if FORMAT specifiers (ifort extension)
- New OpenMP* features include
- IN_REDUCTION clause on the TARGET clause
- ALIGN clause on the ALLOCATE directive
- ALIGN modifier on the ALLCOCATE clause
- DEPEND (and NOWAIT) clause on TASKWAIT directive
- OpenMP combined constructs with the MASKED or MASTER in them
- The MASKED construct is now available (without the FILTER clause) as an alternate to MASTER, which has been deprecated.
These compilers are available in the Intel® oneAPI HPC Toolkit.
Overview
- Corrections to reported problems
- Newly implemented Fortran features
- Intrinsic functions NORM2, BESSEL functions, MERGE_BIT
- F2008 POINTER initialization
- Asynchronous I/O
- IEEE arithmetic
- VOLATILE attribute
- POINTER intent
- New OpenMP* features include
- DISPATCH construct
- ADJUST_ARGS and APPEND_ARGS clauses on DECLARE VARIANT
- INTEROP directive
- TEAMS construct not within a TARGET construct
- LOOP construct
These compilers are available in the Intel® oneAPI HPC Toolkit.
Overview
Intel® Fortran Compiler Classic
- Corrections to reported problems
Intel® Fortran Compiler (Beta)
- A new pre-defined macro is available,
- Added support for general, non-OpenMP compiler directives (!DIR$):
- F2003 and F2008 features added
- Read this supplemental article for more information about the implementation of Fortran 2003, Fortran 2008, OpenMP 4.5 and OpenMP 5.0/5.1 features.
-
New OpenMP* features implemented
- Corrections to reported problems
These compilers are available in the Intel® oneAPI HPC Toolkit.
Overview
Intel® Fortran Compiler Classic
- Minor change to the compiler version reported
Intel® Fortran Compiler (Beta)
- Minor change to the compiler version reported
- Fixes an issue causing ifx OpenMP offload to hang with the latest Level 0 driver.
These compilers are available in the Intel® oneAPI HPC Toolkit.
Overview
Intel® Fortran Compiler Classic
- The Fortran 2018 implementation is complete for ifort.
- New compiler options
- Corrections to reported problems
Intel® Fortran Compiler (Beta)
- The implementation of Fortran 77 and Fortran 90/95 is complete.
- Corrections to reported problems