Re: [Help-gsl] undefined reference problem with GSL functions

[Mike Smith]

I found it's fine if I do the following (as suggested
by the manual)

gcc -Wall -I/usr/local/include/gsl -c test.c;
gcc -L/usr/local/lib/ test.o -lgsl -lgslcblas -lm

Or equivalently do the following
gcc -L/usr/local/lib/ test.c -lgsl -lgslcblas -lm

Thanks for your attention.

--Mike
--- Mike Smith <address@hidden> wrote:

> Hello, All
> 
> I tried a very simple example on the gsl reference
> manual to test the GSL installed in my Cygwin. The
> program is the following:
> 
> #include <stdio.h>
> #include <gsl/gsl_sf_bessel.h>
> 
> int main (void)
> {
>   double x = 5.0;
>   double y = gsl_sf_bessel_J0 (x);
>   printf ("J0(%g) = %.18e\n",x,y);
>   return 0;
> }
> 
> When I do 
> 
> gcc -Wall -L/usr/local/include/gsl test.c -o test ,
> 
> the following error will be reported:
> ..../Temp/ccRVEv5H.o:test.c:(.text+0x3a): undefined
> reference to `_gsl_sf_bessel_J0'
> 
> The undefined reference problem is persistent
> whenever
> I try to use any GSL functions.
> 
> I installed gsl in the default directory and "make
> check" works fine.
> 
> Does anybody know what happens? 
> 
> Thanks a lot,
> 
> --Mike 
> 
> 
>               
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