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IBM XL C/C++ for AIX details

New C/C++ compilers that adopt the Clang infrastructure

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Compared with the legacy XL-based front end, the new Clang-based front end provides full support for C11, C++11, and C++14; more GCC options and pragmas are supported so that you can migrate your programs that were written for and compiled by GCC to IBM® XL C/C++ for AIX® easily.

Exploitation of POWER8 and the latest POWER9 architectures

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Provides the architecture and tune compiler options and built-in functions to explore POWER8® and POWER9™.

Language standard compliance

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The legacy XL-based front end includes conformance to the C89, C99, C++98, and C++03 programming language specifications and support for a subset of the C11 and C++11 standards, and it also supports OpenMP 3.1 and partially supports OpenMP 4.0.
The Clang-based front end fully supports the C89, C99, C11, C++98, C++03, C++03, C++11, and C++14 programming language specifications.

Five levels of industry leading optimizations

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Tailors the optimization process for your applications with 5 distinct optimization levels; tunes the performance of your application for a typical usage scenario with profile-directed feedback (PDF); optimizes across different files (whole-program analysis) to result in significant performance improvements with interprocedural analysis (IPA).

High-performance libraries

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Provides a set of libraries for high-performance mathematical computing including the Mathematical Acceleration Subsystem (MASS) and Basic Linear Algebra Subprograms (BLAS).

Shared memory parallelization

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Supports application development for multiprocessor system architectures.

Diagnostic reports

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Provides important information to help you develop and debug your applications more efficiently with the compiler listings, XML reports, and HTML reports.

Symbolic debugger support

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Includes debugging information in your compiled objects when you use different levels of the -g compiler option.

Entity visibility attributes

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Indicates whether and how an entity defined in one module can be referenced or used in other modules, which can result in decreased size of shared libraries, reduced chance of symbol collision, and improved efficiency of dynamic linking.

Technical details

Software requirements

  • AIX V7.1 TL4
  • AIX V7.2
  • IBM i V7.3 PASE V7.3

Hardware requirements

  • Required hard disk space: 500 MB
  • RAM: 2 GB minimum; 4 GB or more recommended