COBOL Manual for TNS/E Programs (H06.03+)

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Using HP COBOL in the OSS Environment

HP COBOL Manual for TNS/E Programs—520347-003

19-4

Mixed-Language Programs

In the OSS environment, you can write mixed-language programs.

Native HP COBOL programs can call programs written in native HP COBOL, native

HP C, native HP C++, or pTAL.

To produce a native HP COBOL program that contains native HP COBOL and native

HP C modules, follow these steps:

1. Using the c89 utility, compile the HP C modules, but do not link them.

2. Using the ecobol utility, compile the HP COBOL modules, specifying any

necessary linking or SQL-compiling flags.

For example, suppose that you want to produce a loadfile from the native HP COBOL

modules cobol1.cbl and cobol2.cbl and the native HP C modules c1.c and

c2.c.

First you use the c89 utility to compile the HP C modules without linking them:

c89 -c -o cprog.o c1.c c2.c

The resulting object file is cprog.o.

Then you use the ecobol utility to do this:

•

Compile the HP COBOL modules

•

Link the ecobol compiler output, the object file cprog.o, and the native HP C

library.

•

Produce the loadfile myprog:

ecobol -o myprog cprog.o cobol1.cbl cobol2.cbl

The ecobol utility automatically links the HP C DLLs to myprog.

Changing Default Pathnames and Disk Volume

The “Default” column of Table 19-1 shows the default pathnames of the programs that

the ecobol commands call and the default disk volume on which they create

temporary files.

To change one or more of these defaults before executing the ecobol command, use

the export command.

To execute an ecobol command with a specified set of environment variables, use the

OSS env function with the environment variables that Table 19-1 lists and explains.

For the syntax of the env function, see the env(1) command reference page either

online or in the Open System Services System Calls Reference Manual.

The effect of the export command lasts until you explicitly change it. The effect of the

env function applies only to the ecobol command with which you use it.