GNU Scientific Library (GSL): Difference between revisions
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#REDIRECT[[GSL]] |
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The '''GNU Scientific Library''' (or '''GSL''') is a software library for numerical computations in applied mathematics and science. The GSL is written in the C programming language, but bindings exist for other languages as well. |
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'''Online-Documentation:''' http://www.gnu.org/software/gsl/ |
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'''Local-Documentation:''' |
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See 'info gsl', 'man gsl' and 'man gsl-config'. |
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'''Tips for compiling and linking:''' |
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Load the gsl module. After having loaded the gsl environment module, you can use several |
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environment variables to compile and link your application with the gsl library. |
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Your source code should contain preprocessor include statements with a gsl/ prefix, such as |
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<pre> #include <gsl/gsl_math.h></pre> |
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A typical compilation command for a source file example.c with the |
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Intel C compiler icc is |
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<pre> $ icc -Wall -I$GSL_INC_DIR -c example.c </pre> |
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The $GSL_INC_DIR environment variable points to location of |
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the include path for the gsl header files. |
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The following command can be used to link the application with the |
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gsl libraries, |
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<pre> $ icc -L$GSL_LIB_DIR -o example example.o -lgsl -lgslcblas -lm </pre> |
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The $GSL_LIB_DIR environment variable points to the location |
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of the gsl libraries. |
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Also make sure to have the gsl module loaded before running applications build |
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with this library. |
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'''Example''' |
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Create source code file 'intro.c': |
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{| style="width: 100%; border:1px solid #d0cfcc; background:#f2f7ff;border-spacing: 2px;" |
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| style="width:280px; text-align:center; white-space:nowrap; color:#000;" | |
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<source lang="c"> |
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#include <stdio.h> |
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#include <gsl/gsl_sf_bessel.h> |
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int main (void) |
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{ |
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double x = 5.0; |
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double y = gsl_sf_bessel_J0 (x); |
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printf ("J0(%g) = %.18e\n", x, y); |
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return 0; |
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} |
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</source> |
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|} |
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Load the gsl module for the Intel compiler, compile, link and run the program: |
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<pre> |
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$ module load numlib/gsl/1.16-intel-13.1 |
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Loading module dependency 'compiler/intel/13.1'. |
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$ icc -Wall -I$GSL_INC_DIR -c intro.c |
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$ icc -L$GSL_LIB_DIR -o intro intro.o -lgsl -lgslcblas -lm |
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$ ./intro |
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J0(5) = -1.775967713143382642e-01 |
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</pre> |
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[[Category: Numerical libraries]][[Category:bwUniCluster]] |
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Latest revision as of 22:25, 4 February 2022
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