Difference between revisions of "GNU Scientific Library (GSL)"
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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]] |
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Latest revision as of 22:25, 4 February 2022
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