lib/forcefindlib.c

   1 /* Ensures that the FINDLIB_REPLACE_FUNCS macro in configure.in works
   2    Copyright (C) 2004 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 */
  18
  19 /* Written by James Youngman. */
  20
  21
  22 #include <config.h>
  23
  24
  25 extern void forcefindlib(void); /* prevent GCC warning... */
  26
  27
  28
  29 /* forcefindlib
  30  *
  31  * This function exists only to be pulled into libfind.a by the
  32  * FINDLIB_REPLACE_FUNCS macro in configure.in.   We already have
  33  * AC_REPLACE_FUNCS, but that adds to LIBOBJS, and that's a gnulib thing
  34  * in the case of findutils.  Hence we have out own library of replacement
  35  * functions which aren't in gnulib (or aren't in it any more).  An example
  36  * of this is waitpid().   I develop on a system that doesn't
  37  * lack waitpid, for example.   Therefore FINDLIB_REPLACE_FUNCS(waitpid)
  38  * never puts waitpid.o into FINDLIBOBJS.  Hence, to ensure that these
  39  * macros are tested every time, we use FINDLIB_REPLACE_FUNCS on a function
  40  * that never exists anywhere, so always needs to be pulled in.  That function
  41  * is forcefindlib().
  42  */
  43 void
  44 forcefindlib(void)
  45 {
  46   /* does nothing, exists only to ensure that FINDLIB_REPLACE_FUNCS works. */
  47 }