--- configure.in	2008-12-12 13:50:51.000000000 +0100
+++ configure.in.oden	2008-12-12 13:51:27.000000000 +0100
@@ -465,6 +465,7 @@
 # no unprotected single quotes should appear in the expression.
 AC_PATH_PROG(PS, ps, ps)
 AC_MSG_CHECKING("how to check if pid exists")
+if test -z "$FIND_PROC"; then
 PS=$ac_cv_path_PS
 # Linux style
 if $PS wwwp $$ 2> /dev/null | grep -- "$0" > /dev/null
@@ -504,12 +505,14 @@
       AC_MSG_ERROR([Could not find the right ps and/or grep switches. Which OS is this?  See the Installation chapter in the Reference Manual.])
   esac
 fi
+fi
 AC_SUBST(FIND_PROC)
 AC_MSG_RESULT("$FIND_PROC")
 
 # Check if a pid is valid
 AC_PATH_PROG(KILL, kill, kill)
 AC_MSG_CHECKING("for kill switches")
+if test -z "$CHECK_PID"; then
 if $ac_cv_path_KILL -0 $$
 then
   CHECK_PID="$ac_cv_path_KILL -0 \$\$PID > /dev/null 2> /dev/null"
@@ -520,6 +523,7 @@
   AC_MSG_WARN([kill -0 to check for pid seems to fail])
     CHECK_PID="$ac_cv_path_KILL -s SIGCONT \$\$PID > /dev/null 2> /dev/null"
 fi
+fi
 AC_SUBST(CHECK_PID)
 AC_MSG_RESULT("$CHECK_PID")