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- /* Find out if we need the pad field in the header for this machine
- Copyright (C) 1991 Free Software Foundation
-
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2, or (at
- your option) any later version.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
- #include <stdio.h>
-
- struct inc
- {
- char a[20];
- char b[20];
- };
-
- struct test1
- {
- char a;
- struct inc in[5];
- };
-
- struct test2
- {
- char a;
- char b;
- struct inc in[5];
- };
-
- void
- main ()
- {
- struct test1 t1;
- struct test2 t2;
- int t1diff, t2diff;
- FILE *fp = fopen ("testpad.h", "w");
-
- if (fp == 0)
- {
- fprintf (stderr, "testpad: cannot open ");
- fflush (stderr);
- perror ("testpad.h");
- exit (1);
- }
-
- t1diff = (char *) &t1.in[0] - (char *) &t1;
- t2diff = (char *) &t2.in[0] - (char *) &t2;
-
- if (t2diff == t1diff + 1)
- fprintf (fp, "#define NEEDPAD\n");
- else if (t1diff != t2diff)
- fprintf (stderr, "Cannot determine padding for tar struct, \n\
- will try with none.\n");
-
- fclose (fp);
- exit (0);
- }
-