Index: configure.in
===================================================================
--- configure.in	(revision 907)
+++ configure.in	(working copy)
@@ -189,9 +189,32 @@
 
 
 dnl **************************************************
+dnl ICAL_ERRORS_ARE_FATAL
+dnl **************************************************
+AC_MSG_CHECKING(if icalerrors_* calls should abort instead of internally signalling an error)
+AC_ARG_ENABLE(icalerrors-are-fatal, 
+  [  --enable-icalerrors-are-fatal      define ICAL_ERRORS_ARE_FATAL to make icalerror_* calls fatal],
+  [  case "${enableval}" in
+	no)
+	  ac_cv_ical_errors_are_fatal=no
+	  ;;
+	*) 
+	  ac_cv_ical_errors_are_fatal=yes
+	  ;;
+     esac ],
+  ac_cv_ical_errors_are_fatal=yes
+)
+AC_MSG_RESULT($ac_cv_ical_errors_are_fatal)
+
+if test "x$ac_cv_ical_errors_are_fatal" != "xno"; then
+   AC_DEFINE(ICAL_ERRORS_ARE_FATAL, 1, [Define to make icalerror_* calls abort instead of internally signalling an error])
+else
+   AC_DEFINE(ICAL_ERRORS_ARE_FATAL, 0, [Define to make icalerror_* calls abort instead of internally signalling an error])
+fi
+
+dnl **************************************************
 dnl test/regression.c (and maybe others) needs this defined
 dnl **************************************************
-AC_DEFINE(ICAL_ERRORS_ARE_FATAL,1,[Define to make icalerror_* calls abort instead of internally signalling an error])
 AC_DEFINE(NO_WARN_DEPRECATED,1,[Define to 1 if you DO NOT WANT to see deprecated messages])
 AC_DEFINE(NO_WARN_ICAL_MALFORMEDDATA_ERROR_HACK,1,[Define to 1 if you DO NO WANT to see the warning messages related to ICAL_MALFORMEDDATA_ERROR and parsing .ics zoneinfo files])