Index: trunk/psModules/configure.ac
===================================================================
--- trunk/psModules/configure.ac	(revision 5323)
+++ trunk/psModules/configure.ac	(revision 5366)
@@ -47,14 +47,6 @@
 dnl doxygen -------------------------------------------------------------------
 
-AC_PATH_PROG([DOXYGEN], [doxygen], [missing])
-if test "$DOXYGEN" = "missing" ; then
-  AC_MSG_ERROR([doxygen is required])
-fi
-
-dnl needed by doxygen
-AC_PATH_PROG([PERL], [perl], [missing])
-if test "$PERL" = "missing" ; then
-  AC_MSG_ERROR([perl is required])
-fi
+AC_CHECK_PROG([doxygen], [doxygen], [true], [false])
+AM_CONDITIONAL(DOXYGEN, test x$doxygen = xtrue)
 
 dnl pslib ---------------------------------------------------------------------