HP 3000 Manuals HP 3000 Manuals
Chapter 12 RPG Compiler
When you compile an RPG program, the compiler reads the source program
file and produces either a relocatable object file (intermediate form of
an object program that must be converted to executable form by HP Link
Editor/iX) or an executable program file (the form of an object program
that is directly executable). When a program is compiled, a list file is
produced which contains the source program listing and informational,
error and warning messages. If you request it, the compiler also
produces a Cross-Reference listing.
This chapter discusses the MPE/iX commands that compile a program and the
compiler subsystem commands that determine the compiler options that are
used. It also discusses the files used during compilation.
To compile a program successfully, the statements in the source program
must be in the correct order. Figure 12-1 shows this order (compiler
subsystem commands start with $). In summary, a source program file must
contain:
* Not more than one Header Specification (optional).
* At least one Input or Output Specification, unless all files are
display type (the File Type Field (column 15) of the File
Description Specification is D).
___________________________________________________________________________________
| |
| 1 2 3 4 5 6 7 |
| 678901234567890123456789012345678901234567890123456789012345678901234|
| _______________________________________________________ |
| |
| $CONTROL (Compiler subsystem command optional) |
| |
| H (Header Specification optional) |
| |
| F |
| F (File Description Specifications optional) |
| F |
| |
| E (File Extension Specification optional) |
| |
| L (Line Counter Specification optional) |
| |
| I |
| I (Input Specifications optional) |
| I |
| |
| C |
| C (Calculation Specifications optional) |
| C |
| |
| O |
| O (Output Specifications optional) |
| O |
| |
| |
___________________________________________________________________________________
Figure 12-1. The Format of an RPG Source Program File