Intel® C++ Compiler 16.0 User and Reference Guide
This section describes a basic approach to porting applications from the gcc* C/C++ compilers to the Intel® C++ Compiler. These compilers correspond to each other as follows:
|
Language |
Intel® Compiler |
GCC* Compiler |
|---|---|---|
|
C |
icc |
gcc |
|
C++ |
icpc |
g++ |
Unless otherwise indicated, the term "gcc " refers to both gcc* and g++* compilers from the GNU Compiler Collection*.
In many cases, porting applications from gcc to the Intel® C++ Compiler can be as easy as modifying your makefile to invoke the Intel® C++ Compiler (icc ) instead of gcc . Using the Intel® C++ Compiler typically improves the performance of your application, especially for those that run on Intel processors. In many cases, your application's performance may also show improvement when running on non-Intel processors. When you compile your application with the Intel® C++ Compiler, you have access to:
Compiler options that optimize your code for the latest Intel® architecture processors.
Advanced profiling tools (PGO) similar to the GNU profiler gprof.
High-level optimizations (HLO).
Interprocedural optimization (IPO).
Intel intrinsic functions that the compiler uses to inline instructions, including various versions of Intel® Streaming SIMD Extensions and Intel® Advanced Vector Extensions.
Highly-optimized Intel® Math Library for improved accuracy.
Because the Intel® C++ Compiler is compatible and interoperable with gcc , porting your gcc application to the Intel® C++ Compiler includes the benefits of binary compatibility. As a result, you should not have to re-build libraries from your gcc applications. The Intel® C++ Compiler also supports many of the same compiler options, macros, and environment variables you already use in your gcc work.
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Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice. Notice revision #20110804 |