zCOBOL

The zCOBOL architecture comprises several key components that facilitate the compilation, linking, and execution of COBOL programs on open systems. The primary components include the compiler, linker, and runtime environment. The compiler, invoked via the `cobol` command, parses COBOL source code, performs syntax and semantic analysis, and generates object code.

The linker, using the `link` command, combines object files, libraries, and other resources to create an executable program. The runtime environment provides the necessary support for executing the compiled COBOL code, including file I/O, memory management, and system calls. These components interact through a well-defined process.

The compiler reads source code files and generates object files. The linker takes these object files, along with any required libraries, and produces an executable. The runtime environment then loads and executes the compiled program.

zCOBOL uses the file system for storing source code, object files, and executables. It does not use any specific databases or storage mechanisms beyond the file system. The system does not require any specific network ports.

The primary configuration mechanism involves the use of configuration files. These files specify compiler options, include paths, and library paths. The compiler reads these files during the compilation process to determine how to process the source code.

The linker uses these settings to locate and link the necessary libraries. zCOBOL does not expose any APIs. It relies on standard file I/O and system calls for program interaction.

Compared to mainframe-based COBOL environments, zCOBOL offers a more flexible and portable solution. Unlike some competitors, zCOBOL focuses on providing a direct COBOL development environment without requiring a full mainframe emulation.