+echo $ac_n "checking for main in -lefence""... $ac_c" 1>&6
+echo "configure:4673: checking for main in -lefence" >&5
+ac_lib_var=`echo efence'_'main | sed 'y%./+-%__p_%'`
+if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ ac_save_LIBS="$LIBS"
+LIBS="-lefence $LIBS"
+cat > conftest.$ac_ext <<EOF
+#line 4681 "configure"
+#include "confdefs.h"
+
+int main() {
+main()
+; return 0; }
+EOF
+if { (eval echo configure:4688: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+ rm -rf conftest*
+ eval "ac_cv_lib_$ac_lib_var=yes"
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ eval "ac_cv_lib_$ac_lib_var=no"
+fi
+rm -f conftest*
+LIBS="$ac_save_LIBS"
+
+fi
+if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
+ echo "$ac_t""yes" 1>&6
+ efence=true
+else
+ echo "$ac_t""no" 1>&6
+efence=false
+fi
+
+echo $ac_n "checking for enable-efence""... $ac_c" 1>&6
+echo "configure:4710: checking for enable-efence" >&5
+# Check whether --enable-efence or --disable-efence was given.
+if test "${enable_efence+set}" = set; then
+ enableval="$enable_efence"
+ case "${enableval}" in
+ yes) useefence=true
+ echo "$ac_t""yes" 1>&6
+ ;;
+ no) useefence=false
+ echo "$ac_t""no" 1>&6
+ ;;
+ *) echo "$ac_t""bad value ${enableval} for --enable-efence" 1>&6
+ ;;
+esac
+else
+ useefence=false; echo "$ac_t""no" 1>&6
+fi
+
+
+if test "$efence" = "true" -a "$useefence" = "true" ; then
+ ctlibs_tools="$ctlibs_tools -lefence"
+ cat >> confdefs.h <<\EOF
+#define HAVE_EFENCE 1
+EOF
+
+ echo "$ac_t""Using efence" 1>&6
+fi
+