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Precompiled Header: Computer Programming, Header File, C++, Compilers
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| Please note that the content of this book primarily consists of articles
available from Wikipedia or other free sources online. In computer
programming, a pre-compiled header is a technique used by some C or C++
compilers to reduce compilation time. In the C and C++ programming
languages, a header file is a file whose text may be automatically
included in another source file by the C preprocessor, usually specified
by the use of compiler directives in the source file. Header files can
sometimes contain a very large amount of source code (for instance, the
header files windows.h and Cocoa/Cocoa.h on Microsoft Windows and Mac OS
X, respectively). To reduce compilation times some compilers allow
header files to be precompiled into a form that is faster for the
compiler to process. This intermediate form is known as a precompiled
header, and is commonly held in a file named with the extensions .pch or
.gch. A related feature is the prefix header, which is a file that is
automatically included by the compiler without requiring the use of any
compiler directives. |
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