--- a/configure.in	Wed Jun 27 02:29:04 2001 +0000
+++ b/configure.in	Fri Jun 29 18:58:22 2001 +0000
@@ -21,7 +21,7 @@
 ### Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 ### 02111-1307, USA. 
 
-AC_REVISION($Revision: 1.348 $)
+AC_REVISION($Revision: 1.349 $)
 AC_PREREQ(2.9)
 AC_INIT(src/octave.cc)
 AC_CONFIG_HEADER(config.h)
@@ -194,6 +194,11 @@
 OCTAVE_CXX_NEW_FRIEND_TEMPLATE_DECL
 OCTAVE_CXX_ISO_COMPLIANT_LIBRARY
 
+# Determine the ABI used the C++ compiler, needed by the dynamic loading
+# code. Currently supported ABIs are GNU v2, GNU v3 and Sun Workshop.
+
+OCTAVE_CXX_ABI
+
 ### See which C compiler to use (we expect to find gcc).
 
 EXTERN_CFLAGS="$CFLAGS"