CAMD: add octave support

Author: homka122

Diff for: CAMD/MATLAB/camd_demo.m

@@ -25,6 +25,8 @@
 
 n = size (A,1) ;
 
+have_octave = (exist ('OCTAVE_VERSION', 'builtin') == 5) ;
+
 rand ('state', 0) ;
 C = irand (6, n) ;
 
@@ -70,11 +72,15 @@
 [cn, height, parent, post, R] = symbfact (A(p,p)) ;
 
 subplot (2,2,3) ;
-spy (R') ; 
+spy (R') ;
 title ('Cholesky factor L') ;
 
 subplot (2,2,4) ;
-treeplot (parent) ;
+if (have_octave)
+  treeplot (parent')
+else
+  treeplot(parent)
+end
 title ('etree') ;
 
 % results from symbfact

Diff for: CAMD/MATLAB/camd_make.m

@@ -10,18 +10,28 @@
 % Amestoy, and Iain S. Duff.  All Rights Reserved.
 % SPDX-License-Identifier: BSD-3-clause
 
+have_octave = (exist ('OCTAVE_VERSION', 'builtin') == 5) ;
+
 details = 0 ;	    % 1 if details of each command are to be printed
 
 d = '' ;
 if (~isempty (strfind (computer, '64')))
     d = '-largeArrayDims' ;
 end
 
-% MATLAB 8.3.0 now has a -silent option to keep 'mex' from burbling too much
-if (~verLessThan ('matlab', '8.3.0'))
-    d = ['-silent ' d] ;
+if (have_octave)
+    d = ['--silent ' d] ;
+else
+    % MATLAB 8.3.0 now has a -silent option to keep 'mex' from burbling too much
+    if (~verLessThan ('matlab', '8.3.0'))
+        d = ['-silent ' d] ;
+    end
 end
 
+if (have_octave)
+    d = ['-DOCTAVE ' d] ;
+end
+    
 i = sprintf ('-I../Include -I../../SuiteSparse_config') ;
 cmd = sprintf ('mex -O %s -output camd %s camd_mex.c %s', d, i, ...
     '../../SuiteSparse_config/SuiteSparse_config.c') ;

Diff for: CAMD/MATLAB/camd_mex.c

@@ -28,7 +28,10 @@
 
 #include "camd.h"
 #include "mex.h"
+
+#ifndef OCTAVE
 #include "matrix.h"
+#endif
 
 void mexFunction
 (