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