There is no limitations as to libraries you might use in your plugin code. If you give more details we may be able to help.
When you say ‘it stops working as an opcode’, do you mean it does not get loaded? If that is the case, there may be
reasons to do with linking (if the linked libraries are not found for instance).
========================
Prof. Victor Lazzarini
Dean of Arts, Celtic Studies, and Philosophy,
Maynooth University,
Maynooth, Co Kildare, Ireland
Tel: 00 353 7086936
Fax: 00 353 1 7086952 

> On 25 Aug 2018, at 01:08, Forrest Curo  wrote:
> 
> Ah! No libraries containing c++ code?
> 
> On Fri, Aug 24, 2018 at 3:49 PM, Forrest Curo  wrote:
> I've done a simple (adds 2 numbers in init phase & outputs an increasing count in k time) plugin opcode.
> 
> That is, if I put in a line like
> iresult kresult opty 2,2
> I get iresult = 4, and kresult rapidly increasing every time
> 
> When I start putting other things I'd like to play with into the plugin code, some of these work (ie an array of integers) while others (starting to initialize the allegro graphics library) don't. 
> 
> That is, I still get an .so file but it stops working as an opcode.
> 
> What are the limits on this sort of thing? (ie Can I start a new pthread in the opcode & have one branch return to run csound while the other goes on processing?
> 
> 
> 
> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here


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Sounds good.
========================
Prof. Victor Lazzarini
Dean of Arts, Celtic Studies, and Philosophy,
Maynooth University,
Maynooth, Co Kildare, Ireland
Tel: 00 353 7086936
Fax: 00 353 1 7086952 

> On 25 Aug 2018, at 17:22, Forrest Curo  wrote:
> 
> Okay, I think I've got it, no problem. I'd left out a needed "-l" in the compilation line.
> 
> This compilation line seemed to work (everything required for the csound libraries themselves)
> -----------
> forrest@salvage:~/c$ gcc -O2 -shared -o opty.so -fPIC opty.c -DUSE_DOUBLE  -I /usr/local/include/csound
> forrest@salvage:~/c$ sudo cp opty.so /usr/lib
> ------------------------------
> 
> 
> 
> but that led to
> 
> error: syntax error, unexpected T_IDENT, expecting T_OPCODE or T_FUNCTION or ',' or '['  (token "opty") from file utes.csd (1)
>  line 16:
> >>>iresult, kresult opty <<<
> Unexpected untyped word kresult when expecting a variable
> 
> 
> whenever the opcode had the line 'allegro_init(); in  opty_init --
> 
> 
> ----------------------------
> 
> but for the call to allegro to work I should have used [Ooops!]:
> 
> forrest@salvage:~/c$ gcc -O2 -shared -o opty.so -fPIC opty.c -DUSE_DOUBLE  -I /usr/local/include/csound -lalleg
> 
> and that works.
> 
> --------
> Thanks.
> ----------------------------------------------------------------
> ------------------------------------------------- (purpose):
> 
> [computer 1] ------ [ midi keyboard] (computer 1 runs display & human interface)
> |
> |  (cable)
> |
> [computer 2] 
> 
> (Both computers run csound, one to handle midi & generate algorithmic accompaniment, the other to render the sound.)  
> 
> 
> 
> On Sat, Aug 25, 2018 at 2:52 AM, Victor Lazzarini  wrote:
> There is no limitations as to libraries you might use in your plugin code. If you give more details we may be able to help.
> When you say ‘it stops working as an opcode’, do you mean it does not get loaded? If that is the case, there may be
> reasons to do with linking (if the linked libraries are not found for instance).
> ========================
> Prof. Victor Lazzarini
> Dean of Arts, Celtic Studies, and Philosophy,
> Maynooth University,
> Maynooth, Co Kildare, Ireland
> Tel: 00 353 7086936
> Fax: 00 353 1 7086952 
> 
> > On 25 Aug 2018, at 01:08, Forrest Curo  wrote:
> > 
> > Ah! No libraries containing c++ code?
> > 
> > On Fri, Aug 24, 2018 at 3:49 PM, Forrest Curo  wrote:
> > I've done a simple (adds 2 numbers in init phase & outputs an increasing count in k time) plugin opcode.
> > 
> > That is, if I put in a line like
> > iresult kresult opty 2,2
> > I get iresult = 4, and kresult rapidly increasing every time
> > 
> > When I start putting other things I'd like to play with into the plugin code, some of these work (ie an array of integers) while others (starting to initialize the allegro graphics library) don't. 
> > 
> > That is, I still get an .so file but it stops working as an opcode.
> > 
> > What are the limits on this sort of thing? (ie Can I start a new pthread in the opcode & have one branch return to run csound while the other goes on processing?
> > 
> > 
> > 
> > Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
> 
> 
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>         https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here
> 
> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here


Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here