check for octave_base_value m_count

* src/configure.ac: add detect for octave_base_value m_count

* src/octave_sqlite.cc: use OV_COUNT instead of count

Author: lostbard

src/configure.ac

@@ -92,14 +92,38 @@ OF_OCTAVE_LIST_ALT_SYMS([
 [dnl
   [octave_base_value],
   [octave_base_dld_value],
-  [[octave_base_dld_value tmp();]],
+  [[octave_base_dld_value tmp;]],
   [OCTAVE_BASE_CLASS],
   [],
   []
 ]
 
 ],[oct-alt-includes.h])
 
+AC_MSG_CHECKING([for octave_base_value count field])
+octave_count_field=count
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+   #include <octave/oct.h>
+   #ifdef HAVE_CONFIG_H
+   #  include "config.h"
+   #endif
+   class test_base_class : public octave_base_value
+   {
+   public:
+     test_base_class() {}
+     ~test_base_class() {}
+     void test() { m_count ++; }
+     bool is_object (void) const { return true; }
+   };
+  ]], [
+    test_base_class t;  t.is_object();
+  ])],
+ [octave_count_field=m_count],
+ [octave_count_field=count]
+)
+AC_MSG_RESULT([$octave_count_field])
+AC_DEFINE_UNQUOTED([OV_COUNT],$octave_count_field,[octave_base_value ref count field])
+
 CC=$save_CXX
 CXXFLAGS=$save_CXXFLAGS
 LIBS="$save_LIBS"

src/octave_sqlite.cc

@@ -89,7 +89,7 @@ octave_sqlite::clone (void) const
 octave_base_value *
 octave_sqlite::unique_clone (void) 
 {
-  count++;
+  OV_COUNT++;
   return this;
 }
 
@@ -198,7 +198,7 @@ octave_sqlite::subsasgn (const std::string& type, const std::list<octave_value_l
 		}
 	      }
             }
-            count++;
+            OV_COUNT++;
             retval = octave_value (this);
 	  }
         }