Determines if compiled code should be used or not.
A list which must have elements COMPILED and DUP.
Setting flags with this function is primarily for debugging. It should not
normally be needed by users. If called with no arguments,
.DSEflags() returns the current setting.
Several dse functions which call compiled fortran or C code will use
the equivalent S/R version if the
The flag setting affects whether compiled fortran or C code is called.