HP 3000 Manuals

HPTOOLSET XL Reference Manual

RL Files 

When Toolset compiles a source file, it creates a module in the
relocatable library file (RL). The module is given the same name as the
source file.  If a module of that name already exists in the RL, it is
deleted, then recreated.

A module may contain multiple entries, where an entry can be an outer
block, a Pascal procedure or function, a FORTRAN subroutine or function,
or a COBOL subprogram.  Each entry in the RL must have a unique name.
That is, two modules cannot contain entries having the same name.

MPE/iX 5.0 Documentation