Development activity of OpenMP support in clang/llvm compiler has moved to. Please get OpenMP-enabled clang (OpenMP 3.1 is fully supported in clang/llvm 3.7) and contribute to its further development there.
However, a lot of the work that I do is done on macOS instead of a Windows or a. Instead, the recommendation is to now download and install llvm, which. The latter two components are optional and can be ommitted when choosing 'custom install'. This release uses Clang 6.0.0 and GNU Fortran 6.1. Maintainers should visit CRAN check summary page to see whether their package is compatible with the current build of R for Mac OS X.
This web-site is maintained for archival purposes only. The OpenMP ( Open Multi- Processing) specification is a standard for a set of compiler directives, library routines, and environment variables that can be used to specify shared memory parallelism in Fortran and C/C programs. This project implements OpenMP support in the C language family front-end for the compiler. The current scope of the project is to support the specification. News November 27, 2015 - Further development of OpenMP support in clang/llvm compiler moved to www.llvm.org.
This site is maintained for archival purposes only. Thank you to everyone who contributed all these years! September 9, 2014 - Upgrade to clang/LLVM 3.5, updated link to LLVM OpenMP library.
June 10, 2014 - Initial support of omp teams distribute simd, omp target teams distribute simd, omp teams distribute parallel for simdand omp target teams distribute parallel for simd directives (just parsing and semantic analysis). June 9, 2014 - Initial support of omp target data, omp target updateand omp target teams directives (just parsing and semantic analysis). May 6, 2014 - Initial support of omp target, teams, distribute, distribute simd, distribute for, distribute parallel for, distribute parallel for simd and omp declare targetdirectives (no actual offloading, just parsing and semantic analysis). April 11, 2014 - Added support of omp cancel and omp cancellation pointdirectives. March 14, 2014 - Added support of depend clause in omp taskdirective, support for omp parallel for simd directive.
February 6, 2014 - Upgrade to clang/llvm 3.4. December 6, 2013 - Added support of variable length arrays in OpenMP constructs. November 25, 2013 - Added support of omp simd, omp declare reduction directives.
September 27, 2013 - Added support of procbind clause. August 23, 2013 - Initial release. Try OpenMP/Clang Getting the source code $ git clone $ git clone llvm/projects/compiler-rt $ git clone -b clang-omp llvm/tools/clang The source code structure follows Clang/LLVM:. To run (rather than just compile) code you need to get and build an. Also you can try to use trunk-based version of the compiler (supported by ) $ git clone llvm $ git clone llvm/projects/compiler-rt $ git clone llvm/tools/clang Building To build clang with OpenMP support just follow the clang/LLVM compiler's standard build procedure (see ). Using To use the newly installed compiler, add the following to your environment.
On Mac OS X, replace LDLIBRARYPATH with DYLDLIBRARYPATH. Export PATH=/install/prefix/bin:$PATH export CINCLUDEPATH=/install/prefix/include::$CINCLUDEPATH export CPLUSINCLUDEPATH=/install/prefix/include::$CPLUSINCLUDEPATH export LIBRARYPATH=/install/prefix/lib::$LIBRARYPATH export LDLIBRARYPATH=/install/prefix/lib::$LDLIBRARYPATH When you build a program that uses OpenMP directives, add the following options to enable OpenMP support and link to the runtime library.fopenmp Using clang-omp with Xcode Instructions are provided.
Install clang-omp using: brew install llvm. Add llvm binaries to your path using: echo 'export PATH='/usr/local/opt/llvm/bin:$PATH' /.bashprofile. Create a new Xcode project. Under Build Settings. Add a new user-defined setting CC with the value /usr/local/bin/clang-omp. Add -fopenmp to Other C Flags.
Add /usr/local/include to Header Search Paths. Set Enable Modules (C and Objective-C) to No. Under Build Phases. Add /usr/local/lib/libiomp5.dylib to Link Binary With Libraries Done. You can now #include and start using #pragma omp. In your source code.
A simple example Confirm that the compiler is working correctly by saving the above code to a file. $ clang -fopenmp hello.c -o hello $./hello Compilation should proceed with no errors or warnings. Execute the output./hello. You should see more than one “Hello” line with different thread numbers. Note that the lines may be mixed together.
If you see only one, try setting the environment variable OMPNUMTHREADS to some number (say 4) and try again. If you would like to see performance impact, you can try to compile and execute a more complex example. Contribute We welcome contributions of all kinds: patches, code reviews, testing and bug reports.
However, as any other open source project, we have to maintain some level of control to prevent complete chaos and keep a single architectural direction. You can send your patches for review and commit; also, we are very open with granting commit access rights to recognized members of Clang/LLVM community. We plan eventually to contribute this OpenMP implementation to the Clang trunk, where it will be governed by existing Clang/LLVM community development policies. Status Full support for and most of features (except for offloading) are implemented.
This implementation relies on the Intel OpenMP API, and should be used along with Intel® OpenMP. Runtime Library that supports that API (available from ). The following openly available OpenMP test suites pass:.
by OpenUH Research Compiler - passed 119 tests of 123. Supported platforms OS: Linux or Mac OS X Architecture: x86, x86-64, PowerPC, Arm Important Note Please note that this is a preliminary version. While everything is carefully tested and works fine, there are known internal design quality issues. We plan to refactor some parts of the code before submitting them to Clang trunk. And yes, any help with this would be appreciated!
Among known design issues are:. Combined constructs ( #pragma omp parallel for and #pragma omp parallel sections).
Currently these constructs are represented as a pair of #pragma omp parallel and #pragma omp for/sections constructs. This solution leads to ugly representation in AST because of the troubles with the variables capturing. Calculation of iteration indices for #pragma omp for is not quite optimal.
AST representation of this construct also is not very good and should be re-designed. Analysis of atomic constructs and loops should be reworked for better diagnostics and readability. Download quicktime alternative for mac pro.
Also, please note that this development is based on latest released clang (3.5), not what is currently under development in clang trunk. External Projects External projects based on OpenMP implementation hosted here. If you want your project to be listed, please. by Luis Felipe Mattos and Juan Salamanca from UNICAMP (Brazil).
License LLVM, Clang, and Compiler-rt are distributed under LLVM's. In addition to the license, the runtime library component of LLVM ( Compilerrt) is also licensed under the. For details, including information about third-party components, see LICENSE.txt in the code repositories. Contact If you would like to report a bug, or make a feature request, you can submit an issue in Github.