Compaq COBOL AAQ2G1FTK - Manual (Page 537)

Compaq COBOL for OpenVMS VAX and Compaq COBOL Compatibility and Migration
B.1 Compatibility Matrix
Table B–1 (Cont.) Cross-Platform Compatibility of COBOL Features
OpenVMS
VAX OpenVMS
Alpha Tru64
UNIX Windows NT
Alpha
VAX compatible alignment
p p p p
Alpha natural alignment / padding N
p p p
Targetted code generation / optimization
p p p p
/[NO]SEPARATE_COMPILATION P
p
N N
I18N (PIC N, etc.)
p p p p
CALL USING BY DESCRIPTOR
p p
N N
cobfunc, cobcall, and cobcancel N
p p p
Reformat
p p p p
Terminal source format
p p p p
Lowercase, -/_ in source
p p p p
Sample Application - Client/Server N N N
p
Sample Applications - Visual Basic calling
COBOL N N N
p
Oracle CDD/DML support
p p
N N
Transarc Encina (-tps) support N N
p
N
DECset PCA,LSE/SCA support
p p
N N
DECset PDF support
p
N N N
FUSE support N N
p
N
Interactive compiler driver N N N
p
Symbolic debugger support
p p p p
B.2 Differences in Extensions and Other Features
Compaq COBOL contains the following language extensions and other features
that are not in Compaq COBOL for OpenVMS VAX:
• A choice of alignment (with the /ALIGNMENT qualifier) on the compile
command line or as a source directive for individual records; you can select
Alpha data alignment to optimize performance or Compaq COBOL for
OpenVMS VAX data alignment for compatibility with Compaq COBOL for
OpenVMS VAX.
• A flag or qualifier (/ARCHITECTURE or -arch ) that enhances performance
through targeted code generation.
• A flag or qualifier (/ARITHMETIC or -arithmetic ) that selects native or
standard arithmetic.
• A flag or qualifier (/CONVERT=LEADING_BLANKS or -convert
leading_blanks ) that changes all blanks to zeros in numeric display
items in arithmetic expressions or statements.
• A flag or qualifier (/DISPLAY_FORMATTED or -display_formatted ) that
causes the proper display of numeric values without the use of WITH
CONVERSION on the DISPLAY statement.
Compaq COBOL for OpenVMS VAX and Compaq COBOL Compatibility and Migration B–3