Re: [Help-gsl] problem with ode example

[Frank Reininghaus]

Hio,

Am Freitag 28 Mai 2010 13:15:46 schrieb gottstew:
> I copied that example (saved as test_ode.c) and it compiled properly
> (using "gcc -Wall -c test_ode.c") and I got the test_ode.o file as
> expected.

The file test_ode.o is not the final executable file, but only an intermediate 
result. To get an executable file and run it, you can either

1. Run the following commands:

gcc -Wall -c test_ode.c    (like you did)
gcc -o test_ode test_ode.o -lgsl -lgslcblas -lm

The 2nd command calls the so-called linker and produces the executable file 
test_ode which you can run with

./test_ode

2. A bit simpler: Run only the command

gcc -o test_ode test_ode.c -lgsl -lgslcblas -lm

This produces the executable file test_ode directly.

You need the first version (which looks a bit more complicated at first sight) 
if your source code is split between different files.

You can find these steps in the manual:

http://www.gnu.org/software/gsl/manual/html_node/Compiling-and-Linking.html
http://www.gnu.org/software/gsl/manual/html_node/Linking-programs-with-the-
library.html

Cheers,
Frank