Index: iscan-2.21.0/configure.ac
===================================================================
--- iscan-2.21.0.orig/configure.ac
+++ iscan-2.21.0/configure.ac
@@ -68,7 +68,7 @@ AC_PROG_CXX
 #  to be larger than that for the gcc-3.[23] packages (as long as both
 #  are distributed) for smooth upgrade paths.
 
-if test x"$CXX" = xg++; then
+if test "$GXX" = "yes"; then
     AC_MSG_CHECKING([C++ ABI version])
     CXX_ABI="`$CXX -E -dM - < /dev/null | $AWK '/GXX_ABI/ { print $3 }'`"
     AC_MSG_RESULT([$CXX_ABI])