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The name of the XL C/C++ and Fortran compilers are:
| Invocations | Usage (supported standards) |
|---|---|
xlc, xlc_r | Compile C source files. (ANSI C89, ISO C99, IBM language extensions) |
| xlc++, xlc++_r, xlC, xlC_r | Compile C++ source files. |
cc, cc_r | Compile legacy code that does not conform to Standard C. (pre-ANSI C) |
| c89, c89_r | Compile C source files with strict conformance to the C89 standard. (ANSI C89) |
c99, c99_r | Compile C source files with strict conformance to the C99 standard. (ISO 99) |
| xlf, xlf_r, f77,fort77 | Compile FORTRAN 77 source files |
| xlf90, xlf90_r, f90 | Compile FORTRAN 90 source files |
| xlf95, xlf95_r, f95 | Compile FORTRAN 95 source files |
| xlf2003, xlf2003_r, f2003 | Compile FORTRAN 2003 source files |
| xlf2008, xlf2008_r, f2008 | Compile FORTRAN 2008 source files |
| xlcuf | Compile CUDA FORTRAN source files |
The main difference between these commands is that they use different default options (which are set in the configuration files /cineca/prod/opt/compilers/xl/16.1.1/binary/xlC/16.1.1/etc/xlc.cfg.rhel.7.6.gcc.8.4.0.cuda.10.1 and /cineca/prod/opt/compilers/xl/16.1.1/binary/xlf/16.1.1/etc/xlf.cfg.rhel.7.6.gcc.8.4.0.cuda.10.1 respectively for the C/C++ and Fortran compilers).
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The OpenMP parallelization is enabled by the -qsmp compiler option. If -qsmp=omp is specified, strict OpenMP compliance is applied on the compiling programs. Please refer to the official OpenMP support in IBM XL compilers documentation.
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Scientific libraries designed for Power architecture included in the XL compiler package,
> module load xlessl/6.2.1
Documentation: https://www.ibm.com/support/knowledgecenter/SSFHY8/essl_content.html
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