compiling and linking a trivial guile example

[Ido Yehieli]

Hi,
    I've contemplating embedding guile as a scripting language in one 
of      my c++ applications.

I've been reading the reference manual, and tried compiling the first 
example
(from 
http://www.gnu.org/software/guile/docs/docs-1.8/guile-ref/Linking-Guile-into-Programs.html#Linking-Guile-into-Programs):

*****start simple-guile.c*****
     #include <stdlib.h>
     #include <libguile.h>

     static SCM
     my_hostname (void)
     {
       return scm_str2string (getenv ("HOSTNAME"));
     }

     static void
     inner_main (void *data, int argc, char **argv)
     {
       scm_c_define_gsubr ("my-hostname", 0, 0, 0, my_hostname);
       scm_shell (argc, argv);
     }

     int
     main (int argc, char **argv)
     {
       scm_boot_guile (argc, argv, inner_main, 0);
       return 0; /* never reached */
     }
***** end  simple-guile.c*****


like instructed, with:

gcc -o simple-guile simple-guile.c -lguile


However, i get this error message:

/tmp/ccerLXy4.o: In function `my_hostname':simple-guile.c:(.text+0x16): 
undefined reference to `scm_str2string'


I tried also compiling it with:

gcc -o simple-guile simple-guile.c -lguile -lguile-ltdl -lqthreads 
-lpthread -lcrypt -lm

because 'guile-config link' gave the following:

-lguile -lguile-ltdl -lqthreads -lpthread -lcrypt -lm


but to no avail. guile-config compile returns an empty line.
What am I doing wrong?

Thanks,
Ido Yehieli.