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CPP(8) System Manager's Manual CPP(8) NAME cpp - C language preprocessor SYNOPSIS /lib/cpp [ option ... ] [ ifile [ ofile ] ] DESCRIPTION Cpp interprets preprocessor directives and does macro substitution for cc(1) and other compilers. The input ifile and output ofile default to standard input and standard output respectively. The options are: -P Do not place line number markings in output. -C Do not remove comments. -Uname -Dname -Dname=def -Idir Same as in cc(1). -U overrides -D. -H Report all included files on standard error file,. -M Attach modification date to file names in line number directives thus: file@modtime, where modtime is the integer number of sec- onds since the epoch. -T Truncate preprocessor symbols to eight characters. -Ydir Use dir instead of as the last resort in searching for include files. The output file contains processed text sprinkled with lines that show the original input line numbering: # linenumber "ifile" The input language is as described in the reference, with a few addi- tions: The # linenumber marks placed in the output are accepted as an alterna- tive to the official #line directive. These symbols are predefined in various implementations: ibm gcos os tss unix interdata pdp11 u370 u3b u3b5 vax RES RT lint Preprocessor formal parameters are recognized within quoted strings in the replacement text. When comments are removed they are replaced by null strings; this unof- ficial feature makes it possible to construct identifiers by concatena- tion. FILES standard directory for include files SEE ALSO B. W. Kernighan and D. M. Ritchie, The C Programming Language, Pren- tice-Hall, 1988 CPP(8)