1#serial 5 2dnl Copyright (C) 2002, 2005, 2007 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7AC_DEFUN([gl_FUNC_DUP2], 8[ 9 AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) 10 AC_CHECK_FUNCS_ONCE([dup2]) 11 if test $ac_cv_func_dup2 = no; then 12 HAVE_DUP2=0 13 AC_LIBOBJ([dup2]) 14 fi 15]) 16