Download e-book for iPad: 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 handbook presents an entire instructional creation to the GNU C and C++ compilers, gcc and g++. Many books train the C and C++ languages, this publication teaches you the way to exploit the compiler itself. the entire universal difficulties and blunder messages encountered by means of new clients of GCC are rigorously defined, with quite a few easy-to-follow "Hello global" examples. themes lined comprise: compiling C and C++ courses utilizing header documents and libraries, caution strategies, use of the preprocessor, static and dynamic linking, debugging, optimization, platform-specific ideas, profiling and assurance checking out, paths and setting variables, and the C++ commonplace library and templates. contains a specified foreword through Richard M. Stallman, primary developer of GCC and founding father of the GNU venture. the entire funds raised from the sale of this booklet will aid the improvement of unfastened 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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O2’ This option turns on further optimizations, in addition to those used by ‘-O1’. These additional optimizations include instruction scheduling. Only optimizations that do not require any speed-space tradeoffs are used, so the executable should not increase in size. The compiler will take longer to compile programs and require more memory than with ‘-O1’. This option is generally the best choice for deployment of a program, because it provides maximum optimization without increasing the executable size.

The preprocessor also inserts lines recording the source file and line numbers in the form # line-number "source-file ", to aid in debugging and allow the compiler to issue error messages referring to this information. These lines do not affect the program itself. The ability to see the preprocessed source files can be useful for examining the effect of system header files, and finding declarations of system Chapter 4: Using the preprocessor 39 functions. ) ; [ ... additional declarations ...

H> int main (void) { const char asm[] = "6502"; printf ("the string asm is ’%s’\n", asm); return 0; } The variable name asm is valid under the ANSI/ISO standard, but this program will not compile in GNU C because asm is a GNU C keyword extension (it allows native assembly instructions to be used in C functions). out the string asm is ’6502’ Chapter 3: Compilation options 27 For reference, the non-standard keywords and macros defined by the GNU C extensions are asm, inline, typeof, unix and vax.

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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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