Download e-book for kindle: An introduction to GCC : for the GNU compilers gcc and g++ by Brian J. Gough, Richard M. Stallman

By Brian J. Gough, Richard M. Stallman

ISBN-10: 0954161793

ISBN-13: 9780954161798

This guide offers a whole educational advent to the GNU C and C++ compilers, gcc and g++. Many books train the C and C++ languages, this booklet teaches you ways to exploit the compiler itself. all of the universal difficulties and blunder messages encountered via new clients of GCC are rigorously defined, with a variety of easy-to-follow "Hello global" examples. issues lined contain: compiling C and C++ courses utilizing header records and libraries, caution thoughts, use of the preprocessor, static and dynamic linking, debugging, optimization, platform-specific suggestions, profiling and assurance trying out, paths and atmosphere variables, and the C++ general library and templates. encompasses a specified foreword by way of Richard M. Stallman, primary developer of GCC and founding father of the GNU venture. all of the cash raised from the sale of this publication will help the advance of loose software program and documentation

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Extra info for An introduction to GCC : for the GNU compilers gcc and g++

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Both compilers are part of the GNU Compiler Collection. cc -o hello The C++ frontend of GCC uses many of the same the same options as the C compiler gcc. It also supports some additional options for controlling C++ language features, which will be described in this chapter. c’ extension used for C programs. /hello Hello, world! The executable produces the same output as the C version of the program, using std::cout instead of the C printf function. All the options used in 56 An Introduction to GCC the gcc commands in previous chapters apply to g++ without change, as do the procedures for compiling and linking files and libraries (using g++ instead of gcc, of course).

The header files can then be included with ‘#include’ in each source file where they are needed. For example, the following template file creates a simple Buffer class which represents a circular buffer holding objects of type T. #ifndef BUFFER_H #define BUFFER_H template class Buffer { public: Buffer (unsigned int n); void insert (const T & x); T get (unsigned int k) const; private: unsigned int i; unsigned int size; T *pT; Chapter 7: Compiling a C++ program 59 }; template Buffer::Buffer (unsigned int n) { i = 0; size = n; pT = new T[n]; }; template void Buffer::insert (const T & x) { i = (i + 1) % size; pT[i] = x; }; template T Buffer::get (unsigned int k) const { return pT[(i + (size - k)) % size]; }; #endif /* BUFFER_H */ The file contains both the declaration of the class and the definitions of the member functions.

Whether or not this option produces a beneficial result has to be examined on a case-by-case basis. ‘-Os’ This option selects optimizations which reduce the size of an executable. The aim of this option is to produce the smallest possible executable, for systems constrained by memory or disk space. In some cases a smaller executable will also run faster, due to better cache usage. It is important to remember that the benefit of optimization at the highest levels must be weighed against the cost.

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An introduction to GCC : for the GNU compilers gcc and g++ by Brian J. Gough, Richard M. Stallman

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