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13 lines
746 B
Text
13 lines
746 B
Text
unifdef (selectively processes C conditional compilation)
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The unifdef utility selectively processes conditional C preprocessor #if
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and #ifdef directives. It removes from a file both the directives and the
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additional text that they delimit, while otherwise leaving the file alone.
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It is useful for avoiding distractions when studying code that uses
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#ifdef heavily for portability: the author's original motivation was to
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understand xterm's pty handling code. It can be used as a lightweight
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preprocessor; for example the Linux kernel uses unifdef to strip out
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#ifdef __KERNEL__ sections from the headers it exports to userland. You
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can use unifdef with languages other than C; for example UIT, a publisher
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in Cambridge, uses unifdef with LaTeX.
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