XL C/C++ for z/VM

Features
System requirements

An advanced optimizing compiler for the z/VM platform

IBM XL C/C++ for z/VM is a standards-based programming tool for developing large, complex, computationally-intensive applications. XL C/C++ for z/VM lets you write C and C++ applications or extend existing C applications using C++.

Standards compliance: Conforms to the ISO/IEC 9899:1999 international standard (C99), the latest ANSI/ISO 1998 C++ standard, and a standards-conforming C compiler and includes the C++ Standard Library.
HOT support: Uses the high order transformation (HOT) option for high-order transformations, which are optimizations that improve performance for loops through techniques such as interchange, fusion, and unrolling.
OPTIMIZE(3) support: Supports OPTIMIZE(3) or OPT(3), the compiler's highest and most aggressive level of optimization.
LANGLVL compiler option: Supports all available language levels that you can use to compile your code within XL C/C++ for z/VM.
Portability: Supports industry standards to simplify the porting of applications to z/VM from both IBM and non-IBM platforms.

Standards compliance

The C++ Standard Library includes the following: the C++ Standard I/O Stream Library for performing input and output (I/O) operations; the C++ Standard Complex Mathematics Library for manipulating complex numbers; and the STL, which is composed of C++ template-based algorithms, container classes, iterators, localization object, and the string class.
XL C/C++ for z/VM includes the UNIX System Laboratories I/O Stream and Complex Mathematics libraries.

OPTIMIZE(3) support

OPT(3) introduces additional options and pragmas to help you improve your application performance, including the loop unrolling option and pragmas and a number of new built-in functions.
Using the OPT(0), OPT(2) and OPT(3) options, you can obtain optimization levels that run from comprehensive low-level optimizations to more extensive optimizations.

XL C/C++ for z/VM resources

XL C/C++ for z/VM library
See the announcement letters, product documentation, information centers, and white papers for XL C/C++ for z/VM.

White paper: XL C/C++
This paper provides an overview of the XL C/C++ compilers and how their features can help you with your C and C++ development needs.

White paper: Code optimization with the XL compilers
This paper introduces the most important capabilities and describes the compiler options, source constructs, and techniques to maximize application performance.