IBM Licensed Programs: Application Development Products
654 AS/400e System Handbook
Programmer Productivity
The ILE C compiler provides a number of tools to make more efficient use of time and
resources. The CHECKOUT compile option identifies possible programming errors that can
otherwise be difficult to find at runtime. The CVTCSRC tool assists in migrating EPM and
System C/400 code to ILE C code. The tool scans the source and recommends changes. It is
located in the example source files in the QCLE library. The ILE source Debugger provides
interactive source level debugging. It provides capabilities such as viewing source programs,
setting break-points by cursor position, stepping through source statements, and displaying
or changing values of program variables.
IBM ILE C for AS/400 continues to support industry standards, such as ANSI, enabling
applications written in ANSI C on other platforms to be easily ported to the AS/400 system.
V4R4 Enhancements
• Support for integrated file system files larger than 2 GB
• Support for UCS-2 (Unicode CCSID 13488)
• Support for teraspace: A memory model that allows more than 16 MB of contiguous
storage in one allocation
• Integer-to-pointer conversion
IBM CICS Transaction Server for AS/400 V4R4, 5769-DFH
The CICS platform is widely-used as a basis for implementing business solutions. CICS for
AS/400 enables many of these existing applications to be made available on the AS/400
system without excessive costs of code conversion. AS/400 applications can coexist with
CICS applications.
CICS for AS/400 supports CICS COBOL Command-Level or C applications on the AS/400
system. It is based on a major subset of the CICS/ESA Application Programming Interface
(API) and supports Minimal Function Basic Mapping Support (BMS).
If a user wants to write an application program using the CICS for AS/400 API, then ILE
COBOL for AS/400 (see “IBM Integrated Language Environment COBOL for AS/400 V4R4,
5769-CB1” on page 648) or ILE C for AS/400 (see “Integrated Language Environment C for
AS/400 V4R4, 5769-CX2” on page 652) is required. COBOL or C applications developed for
CICS/DOS/VS, CICS/OS/VS, CICS/ESA, CICS/MVS, CICS/VM, CICS OS/2, and CICS/6000
are generally source-compatible with CICS for AS/400 if they use only the CICS
command-level API. Application support is available for both single-byte and double-byte
character-set based applications.
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