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
