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  Intel C and C++

Contents

• Introduction
• Options
• Documentation

Introduction

The C compiler on Ram is the Intel C/C++ "ecc" (extended C compiler). It supports the C99 ANSI standard.

ecc ...

The default "ecc" is version 7. A version 8 is also available for use. Use the "module" command to load an alternate version of the compiler. Note that for version 8, the C compiler is named "icc", but "ecc" will still work.

Options

The following options control the amount of debugging information generated by the compiler. They can adversely affect optimization.

-g	Produce symbolic debug information in object file.

For most cases, the usual levels of optimization are appropriate (-O0, -O1, -O2 (default), -O3). Here are a few exceptions.

-tpp2	Target optimization to the Itanium 2 processor.
-prof_gen	Instrument program for profiling.
-opt_report	Generate an optimization report to stderr.
-openmp	Enable the compiler to generate multi-threaded code based on the OpenMP* directives.
-openmp_profile	Link with instrumented OpenMP runtime library to generate OpenMP profiling information for use with the OpenMP component of the VTune(TM) Performance Analyzer.
-parallel	Enable the auto-parallelizer to generate multi-threaded code for loops that can be safely executed in parallel.

Documentation

See "man ecc" for a full list of compiler options. Note that the man page corresponds to the currently load C module. Thus, you get the version 7 man page by default. After loading the version 8 compiler, a "man icc" will produce the version 8 man page.

SGI and Intel have more information at the following URLs.

• SGI's Intel C/C++ Compiler for Linux
• Intel C++ Compiler Reference Manuals and User's Guides
• Intel Debugger (IDB) Mannual