This is the command ifnames that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
ifnames - Extract CPP conditionals from a set of files
SYNOPSIS
ifnames [OPTION]... [FILE]...
DESCRIPTION
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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