I think you need to use Pd's c_externdir method to determine the
extern's path. This is basicaly how I opened a .so in an external:
void *my_extern_tilde_new(t_symbol *s, int argc, t_atom *argv)
{
// creates the object
t_my_extern *x = (t_my_extern *)pd_new(my_extern_class);
// using Pd's open_via_path to find myextern, and from there
my_other_lib.so
char *externdir = myextern_class->c_externdir->s_name;
x->my_other_lib = dlopen(externdir, RTLD_NOW | RTLD_LOCAL);
...
Joel
On 01/09/2015 03:34 PM, David Medine wrote:
I am writing an extern that uses a 3rd party shared object library. I
keep getting a
"cannot open shared object file: No such file or directory"
posted to the Pd console when I load the extern. The library is
linking properly in my makefile (as far as I can tell) and the .so
file that I want the extern to load is in the same folder as the
extern. I have also put the path to the unfound library in Pd's path
list.
I have also compiled a different, plain old dylib/shared object/dll
using this very same library for use in python and it works perfectly.
I've also written C and C++ programs that link to this library at run
time and they work perfectly too. Does anybody have any idea why Pd
hates it?
I have also done dynamic loading successfully in a Pd extern using the
sphinx library. The only difference there was that there the sphinx
libraries were installed in a standard library directory (ie /usr/lib
or something like that) . I can't try to do this right now because I
don't have su rights on the computer I am using. My understanding,
though, is that linux should be searching for dynamic libraries in the
directory that the parent application is in. So I also tried putting
my unfound library in pd-0-whatever/bin. No joy.
I have tried compiling using gcc and g++ on linux. I've also tried to
link with those compilers as well as ld (which is called by those
compilers if you link with them). I haven't tried any other OSs yet.
Thanks in advance,
David
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