* configure.in (AC_DEBUG): add test

* acinclude.m4 (AC_DEBUG): Define debug-feature and set DEBUG, NODEBUG,
or NDEBUG according to its value.

eo/ChangeLog

@@ -1,5 +1,9 @@
+2006-11-16  Jochen Küpper  <jochen@fhi-berlin.mpg.de>
 
+	* configure.in (AC_DEBUG): add test
 
+	* acinclude.m4 (AC_DEBUG): Define debug-feature and set DEBUG, NODEBUG,
+	or NDEBUG according to its value.
 
 	* Local Variables:
 	* coding: iso-8859-1

eo/acinclude.m4

@@ -19,6 +19,29 @@ AC_DEFUN([AC_APPLICATIONS],[dnl
 
 
 
+# AC_DEBUG()
+#
+# Check for commandline options requesting DEBUG feature.
+# Might define DEBUG, NODEBUG, or NDEBUG, depending on flags given.
+AC_DEFUN([AC_DEBUG],[dnl
+  AC_ARG_ENABLE([debug], 
+    AC_HELP_STRING([--enable-debug], [include debugging code (default=no)]),
+    [ case "${enableval}" in
+      yes) debug=true ;;
+      no) debug=false ;;
+      *) AC_MSG_ERROR(bad value ${enableval} for debug option) ;;
+    esac],
+    [debug=false])
+  if test "$debug" = true; then
+    AC_DEFINE([DEBUG], true, [Debugging flag])
+  else
+    AC_DEFINE([NDEBUG], true, [no debugging])
+    AC_DEFINE([NODEBUG], true, [no debugging])
+  fi
+])
+
+
+
 # AC_GNUPLOT()
 #
 # Compile applications unless user requests not to do it.

eo/configure.in

@@ -46,6 +46,7 @@ AC_CHECK_LIB(m, cos)
 
 dnl user-switches
 AC_APPLICATIONS
+AC_DEBUG
 AC_GNUPLOT
 AC_TUTORIAL