IFNAMES(S)                                             IFNAMES(S)



NAME
       ifnames  - print identifiers that a package uses in C pre-
       processor conditionals

SYNOPSIS
       ifnames [ --help | -h ] [ --version | -V ]

DESCRIPTION
       ifnames can help when writing a configure.ac for  a  soft-
       ware  package.  It prints the identifiers that the package
       already uses in C preprocessor conditionals.  If a package
       has  already  been  set  up to have some portability, this
       program can help you figure out what its  configure  needs
       to  check for.  It may help fill in some gaps in a config-
       ure.ac generated by autoscan (see autoscan(n)).

       ifnames scans all of the C source files named on the  com-
       mand  line  (or the standard input, if none are given) and
       writes to the standard output a sorted  list  of  all  the
       identifiers  that  appear  in  those  files in #if, #elif,
       #ifdef, or #ifndef directives.  It prints each  identifier
       on a line, followed by a space-separated list of the files
       in which that identifier occurs.

       ifnames accepts the following options:

       --help

       -h     Print a summary of the  command  line  options  and
              exit.

       --version

       -V     Print the version number of Autoconf and exit.


SEE ALSO
       autoconf(f),  autoheader(r),  autoreconf(f),  autoscan(n),
       autoupdate(e)

AUTHORS
       David MacKenzie, with help  from  Franc,ois  Pinard,  Karl
       Berry,  Richard  Pixley, Ian Lance Taylor, Roland McGrath,
       Noah Friedman, David D. Zuhn, and many others.  This  man-
       page  written  by  Ben Pfaff <pfaffben@debian.org> for the
       Debian GNU/Linux autoconf package.



                             Autoconf                  IFNAMES(S)