-In most cases, these tests are implemented in the end of the same file
-with functions that are normally commented out, but ca be included by
-defining a pre-processor variable when building the file separately.
-The details of the needed build options are included in the Makefile
-(test-* targets). All automated unit tests can be run with
+The test programs are collected in the tests subdirectory. All
+automated unit tests can be run with