Librerias
=========

Instalación de librerías.

Librería gls
------------

Para instalar la librería gls

.. code-block:: bash

	[root@hope ~]# cd /export/apps/src/
	[root@hope src]# wget http://gnu.c3sl.ufpr.br/ftp/gsl/gsl-2.6.tar.gz
	[root@hope src]# gunzip -c gsl-2.6.tar.gz | tar -xvof -
	[root@hope gsl-2.6]# cd gsl-2.6
	[root@hope gsl-2.6]# ./configure --prefix=/share/apps
	[root@hope gsl-2.6]# make
	[root@hope gsl-2.6]# make install
	[root@hope gsl-2.6]# make clean


Lo que falta ahora es configurar el directorio ld

.. code-block:: bash

	[root@hope ~]# echo "/export/apps/lib" >> /etc/ld.so.conf.d/gsl.conf
	[root@hope ~]# ldconfig 


Para testear que todo esté funcionando creamos el archivo *testgsl.c*

.. code-block:: c

	#include <gsl/gsl_sf_trig.h>
	#include <stdio.h>

	int main(void){
	        double x,dx;
	        gsl_sf_result y;
	        x=1;
	        dx=0.1;
	        gsl_sf_sin_err_e(x,dx,&y);
	        printf("sin(%lf+/-%lf) = %lf+/-%lf\n",x,dx,y.val,y.err);
	}


.. code-block:: bash

	[hopeadmin@hope ~]$ gcc -I/share/apps/include -c testgsl.c -o testgsl.o
	[hopeadmin@hope ~]$ gcc testgsl.o -L/share/apps/lib -lgslcblas -lgsl -o testg
	sl.out                                                                          
	[hopeadmin@hope ~]$ ldd testgsl.out 
	        linux-vdso.so.1 =>  (0x00007fffa432d000)
	        libgslcblas.so.0 => /export/apps/lib/libgslcblas.so.0 (0x00007ffab5ded000)
	        libgsl.so.25 => /export/apps/lib/libgsl.so.25 (0x00007ffab5920000)
	        libc.so.6 => /lib64/libc.so.6 (0x0000003911400000)
	        libm.so.6 => /lib64/libm.so.6 (0x0000003911800000)
	        /lib64/ld-linux-x86-64.so.2 (0x0000003911000000)
	[hopeadmin@hope ~]$ ./testgsl.out 
	sin(1.000000+/-0.100000) = 0.841471+/-0.054030

Para compilar sin tener que pasar tantos argumentos

.. code-block:: bash

	[hopeadmin@hope ~]$ export CPATH=/share/apps/include
	[hopeadmin@hope ~]$ export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/export/apps/lib
	[hopeadmin@hope ~]$ export LIBRARY_PATH=/export/apps/lib
	[hopeadmin@hope ~]$ gcc -lgslcblas -lgsl testgsl.c -o testgsl.out