TNS/R Native Application Migration Guide

COBOL85 Migration Tasks
TNS/R Native Application Migration Guide—523745-001
4-2
Migrating COBOL85 Programs
3. If necessary, change your source program (see Changing the Source Program on
page 4-4).
To learn whether you must change your source program, compile it with the
NMCOBOL compiler, which will issue warnings when it encounters source
constructs that it does not accept. Running the NMCOBOL compiler with the new
DIAGNOSE-85 directive is especially recommended. This directive causes the
NMCOBOL compiler to issue warnings when it encounters source constructs that
could cause the program to produce different results than it would if it were
compiled with the COBOL85 compiler. For a complete description of the
DIAGNOSE-85 directive, see the COBOL85 for NonStop Systems Manual.
4. If your program calls TNS programs, migrate them to native mode. Native
programs cannot call TNS programs. For the following list of languages, follow
these instructions. The last one, Data Alignment on page 4-3, applies to several
languages.
•
C/C++
Recompile C and C++ programs with the native C and C++ compilers,
respectively. Verify to specify symbols when recompiling a C or C++ program
that your COBOL85 program references in a CALL or ENTER statement. For
information on tools that can help you migrate C and C++ programs to native
mode, see Section 3, C and C++ Migration Tasks.
•
COBOL 74
Convert COBOL 74 programs to COBOL85 (see the COBOL85 for NonStop
Systems Manual) and then migrate them to native COBOL85.
•
TAL
Convert TAL programs to pTAL (see the pTAL Conversion Guide). Some CRE
library routines might no longer exist, so you might have to change calls to
them. Also, if you want to reference an object in a CALL or ENTER statement,
you must compile your pTAL program with symbols.
If any of your TAL programs use the FORTRAN convention for determining the
length of a string parameter (that is, if they use the ENTER routine and do not
specify the language TAL), convert them to use another method (for example,
use the string:length convention or pass the length as a separate
parameter).
For information on tools that can help you convert TAL programs to pTAL
programs, see Section 5, TAL to pTAL Conversion Tasks.
•
FORTRAN and Pascal
There are no native FORTRAN or Pascal compilers. Rewrite FORTRAN and
Pascal programs in native C, native C++, native COBOL85, or pTAL. You need
not use the same language for all of them.