XL C/C++ for z/VM Modernization Guide

XL C/C++ for z/VM is a standards-conforming C/C++ compiler designed for the z/VM operating system. It enables development and compilation of C and C++ applications on the z/VM platform.

The primary use case is compiling C and C++ source code into executable programs that run on z/VM. This includes developing system utilities, application software, and middleware components.

XL C/C++ for z/VM supports standard C and C++ language features, optimization techniques for z/VM, and integration with z/VM system services.

The compiler transforms C/C++ source code into machine code executable on z/VM. It performs lexical analysis, parsing, semantic analysis, optimization, and code generation.

The core command is `xlc` or `xlC` (depending on whether you are compiling C or C++ code). Options control optimization levels, debugging information, and target architecture. For example, `xlc -O2 myprogram.c` compiles `myprogram.c` with optimization level 2.

Configuration files include compiler option sets and environment variables that influence the compilation process. These files allow customization of compiler behavior.

XL C/C++ for z/VM primarily uses native APIs for interacting with the z/VM operating system. These APIs are accessed through standard C/C++ library functions.

The compiler uses standard protocols for file access and system calls within the z/VM environment.

XL C/C++ for z/VM enables development of high-performance applications tailored for the z/VM environment, optimizing resource utilization and system throughput.

By leveraging the compiler's optimization capabilities, organizations can reduce the resources required to run applications, leading to cost savings.

The compiler supports industry standards, ensuring application portability and reducing vendor lock-in.

It allows organizations to leverage existing C/C++ skills and codebases on the z/VM platform, reducing the learning curve and development time.

XL C/C++ for z/VM relies on the security features provided by the underlying z/VM operating system. It does not implement its own authentication mechanisms.

Access control is managed by the z/VM operating system's security mechanisms. These mechanisms typically include user authentication and authorization based on user IDs and group memberships.

Encryption is handled by the z/VM operating system and is not directly implemented by the compiler. Data can be encrypted at the file system level or during network transmission using z/VM's security features.

Auditing and logging are performed by the z/VM operating system. The compiler does not provide its own auditing capabilities but relies on the system's logging facilities.

The compiler is managed through command-line interfaces and configuration files. There is no dedicated GUI or web console.

User management is handled by the z/VM operating system. The compiler uses the existing user accounts and permissions defined in z/VM.

Key configuration parameters include compiler options, optimization levels, and target architecture settings. These parameters are set through command-line options or configuration files.

Monitoring and logging are performed at the z/VM system level. The compiler does not provide specific monitoring tools but relies on z/VM's system monitoring and logging capabilities.