From help-octave-request at bevo dot che dot wisc dot edu Wed Feb  4 10:06:32 2004
Subject: Problems calling functions created with Matwrap
From: "Marco Gazzoni" <marco dot gazzoni at polito dot it>
To: <help-octave at bevo dot che dot wisc dot edu>
Date: Wed, 4 Feb 2004 17:06:31 +0100


 I'm using Octave (ver.2.0.16 under Debian ) to develop some methods for
 bio-signal processing.
 Some algorithm are very time consuming and I have written them in C. Now I
 need to call the functions from Octave.
 I have installed Matwrap but I'm not able to run the compiled function from
 Octave.
 Then, I have written a very simple test function but it doesn't work.

 I have a header file test.h with the prototype of the function test:

 int test(int);

 And the source test.cc file:

 int test(int val)
 {
     val= val*2;
     return(val);
 }

 To create the needed interface and the library I use the following
commands:

 matwrap -language octave test.h -o test_octave.cc -stub test_octave_stub.cc
 mkoctfile test_octave.cc -lm

 All seems to work well and no error messages are diaplayed. The following
 files are created:
 Test.m, test_octave.cc, test_octave_stub.cc, test_octave.o, test_octave.oct
 When I open Octave and I run "test" from the command line Octave crashes.
 Where is the problem? Someone has some suggestions?

 Thanks for your attention, Marco










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