2014-11-06 8:06 GMT+01:00 Roger Mc Murtrie <rogermc@grapevine.com.au>:

> I have just started learning Guile on my Mac OS X 10.10 (Yosemite) but my
> attempt to build the Writing Guile Extensions example failed with:
>
> gcc `pkg-config --cflags guile-2.0` -shared -o libguile-bessel.so -fPIC
> bessel.c
> Undefined symbols for architecture x86_64:
>   "_scm_c_define_gsubr", referenced from:
>       _init_bessel in bessel-6d66cf.o
>   "_scm_from_double", referenced from:
>       _j0_wrapper in bessel-6d66cf.o
>   "_scm_to_double", referenced from:
>       _j0_wrapper in bessel-6d66cf.o
> ld: symbol(s) not found for architecture x86_64
>
> The simple-guile example built and worked OK.
>
> Any advice appreciated.
>

Try adding `pkg-config --libs guile-2.0` to the command line.

HTH
M