ifnames - Man Page

ifnames [OPTION]... [FILE]...

Scan all of the C source FILES (or the standard input, if none are given) and write to the standard output a sorted list of all the identifiers that appear in those files in '#if', '#elif', '#ifdef', or '#ifndef' directives.  Print each identifier on a line, followed by a space-separated list of the files in which that identifier occurs.

-h,  --help

print this help, then exit

-V,  --version

print version number, then exit

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