+# You may also need to give the location of its headers. The following
+# should work on Mac OS X (which needs the above option as well) with
+# macports.
+#EXTRA_INCLUDES += -I/opt/local/include
+
+
+##
+## libc
+##
+
+# You may uncomment this if you know that your system C libary provides
+# asprintf and vasprintf. (GNU libc does.) If HAS_SYSTEM_ASPRINTF is not
+# defined, an implementation provided in libtu/sprintf_2.2/ is used.
+#HAS_SYSTEM_ASPRINTF=1