r details.

   (3) Other regression tests, some of which have not (yet) been
       put into the framework.  They are also named *_reg.

   (4) Programs that were used to test library functions or auto-generate
       library code.  These are useful for testing the behavior of small
       sets of functions and for providing example code.

6. Sanitizers can be used on all the regression tests in alltests_reg.c.

   First run autogen.sh to generate the configure script
     autogen.sh
   Then run configure t