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C/370

IBM Not Supported z/OS z/VM zVSE/VSEn
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Product Overview

C/370's architecture comprised several key components. The compiler itself was the core, responsible for translating C source code into object code. The preprocessor handled directives like `#include` and `#define`.

The linker combined object files and libraries to create executable programs. The runtime libraries provided essential functions for C programs. Integration with the mainframe was achieved through system calls, allowing access to operating system services and hardware resources.

The compiler used system-specific headers to interface with the z/OS, z/VM, and zVSE/VSEn environments. The compilation process involved the following steps: preprocessing, compilation, assembly, and linking. The `CC` command initiated the compilation process.

The compiler did not have a dedicated database or storage mechanism; it relied on the mainframe's file systems and storage. Security was managed through the mainframe's security infrastructure, such as RACF, which provided authentication and access control. The compiler did not provide encryption capabilities.

The recommended migration path is to a supported C/C++ compiler for z/OS, such as OS/390 C/C++ or z/OS XL C/C++. The migration process involves recompiling the existing code with the new compiler and addressing any compatibility issues. The main differentiator was its mainframe compatibility.

Frequently Asked Questions

What is C/370?

C/370 is a compiler for the C programming language designed for IBM mainframe systems. It enables developers to write and compile C code for z/OS, z/VM, and zVSE/VSEn environments. It provides features for system programming, application development, and interfacing with existing mainframe applications.

How does C/370 compile C code?

C/370 supports the compilation of C source code into executable programs. It includes a preprocessor, compiler, and linker. The compiler translates C source code into object code, which is then linked with libraries to create an executable program. The compiler also provides options for optimization and debugging.

What are the common commands and syntax for C/370?

Common commands include `CC` for compilation, `LINK` for linking object files, and `EDIT` for source code editing. The syntax for compilation is `CC sourcefile.c -o outputfile`. Configuration often involves specifying include paths and library paths. These are typically set using environment variables or compiler options.

How does C/370 integrate with the mainframe environment?

C/370 integrates with the mainframe environment through system calls and interfaces. It allows developers to access mainframe resources and services. The compiler supports the use of system-specific headers and libraries, enabling interaction with the operating system and other system components.

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