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This chapter describes the use of the GNU C preprocessor cpp
,
which is part of the GCC package. The preprocessor expands macros in
source files before they are compiled. It is automatically called
whenever GCC processes a C or C++ program.13
• Defining macros: | ||
• Macros with values: | ||
• Preprocessing source files: |
In recent versions
of GCC the preprocessor is integrated into the compiler, although a
separate cpp
command is also provided.