diff --git a/src/configure b/src/configure
index be59f62d0..be1d07b61 100755
--- a/src/configure
+++ b/src/configure
@@ -1521,8 +1521,7 @@ Optional Packages:
   --with-rt               Deprecated! include MIT-RT testing environment
                           (yes|builtin|no, default=NO)
   --with-profile          Deprecated! include CMUCL's simple profiler
-                          (yes|builtin|no, default=YES if Boehm-Weiser garbage
-                          collector used)
+                          (yes|builtin|no, default=NO)
   --with-dffi             dynamic foreign function interface
                           (system|included|auto|no, default=AUTO if libffi
                           available)
@@ -2859,7 +2858,7 @@ fi
 if test "${with_profile+set}" = set; then :
   withval=$with_profile;
 else
-  with_profile=NO
+  with_profile=no
 fi
 
 
@@ -9341,7 +9340,7 @@ fi
 done
 
 
-for ac_func in sched_yield uname fseeko backtrace backtrace_symbols
+for ac_func in sched_yield uname fseeko dladdr backtrace backtrace_symbols
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
diff --git a/src/configure.ac b/src/configure.ac
index 6d50435ec..297482eb0 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -185,15 +185,15 @@ AC_ARG_WITH(bytecmp,
 
 AC_ARG_WITH(rt,
   AS_HELP_STRING( [--with-rt],
-                  [include MIT-RT testing environment]
-                  [(yes|builtin|no, default=YES)]),
-  [], [with_rt=yes])
+                  [Deprecated! include MIT-RT testing environment]
+                  [(yes|builtin|no, default=NO)]),
+  [], [with_rt=no])
 
 AC_ARG_WITH(profile,
   AS_HELP_STRING( [--with-profile],
-                  [include CMUCL's simple profiler]
-                  [(yes|builtin|no, default=YES if Boehm-Weiser garbage collector used)]),
-  [], [with_profile=yes])
+                  [Deprecated! include CMUCL's simple profiler]
+                  [(yes|builtin|no, default=NO)]),
+  [], [with_profile=no])
 
 AC_ARG_WITH(dffi,
   AS_HELP_STRING( [--with-dffi],
diff --git a/src/ecl/configpre.h b/src/ecl/configpre.h
index f1681d1ec..96795696f 100644
--- a/src/ecl/configpre.h
+++ b/src/ecl/configpre.h
@@ -102,6 +102,9 @@
 /* Define to 1 if you have the <dirent.h> header file. */
 #undef HAVE_DIRENT_H
 
+/* Define to 1 if you have the `dladdr' function. */
+#undef HAVE_DLADDR
+
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H