path: root/mcon/U/alignbytes.U
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authorManoj Srivastava <>2003-12-01 17:11:15 +0000
committerManoj Srivastava <>2003-12-01 17:11:15 +0000
commit371472d9fb6a936149b105a6563a0550d35bdf1a (patch)
tree6d23751e44a7dddf4e29918551f1ea0513352622 /mcon/U/alignbytes.U
Initial import of upstream branch
Initial import of upstream branch git-archimport-id:
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+?RCS: $Id: alignbytes.U,v 1994/10/29 16:02:28 ram Exp $
+?RCS: Copyright (c) 1991-1993, Raphael Manfredi
+?RCS: You may redistribute only under the terms of the Artistic Licence,
+?RCS: as specified in the README file that comes with the distribution.
+?RCS: You may reuse parts of this distribution only within the terms of
+?RCS: that same Artistic Licence; a copy of which may be found at the root
+?RCS: of the source tree for dist 3.0.
+?RCS: $Log: alignbytes.U,v $
+?RCS: Revision 1994/10/29 16:02:28 ram
+?RCS: patch36: added ?F: line for metalint file checking
+?RCS: Revision 1994/05/06 14:25:20 ram
+?RCS: patch23: avoid ALIGNBYTES, since it conflicts on NetBSD
+?RCS: Revision 3.0 1993/08/18 12:05:23 ram
+?RCS: Baseline for dist 3.0 netwide release.
+?MAKE:alignbytes: Myread cat cc ccflags rm
+?MAKE: -pick add $@ %<
+?S: This variable holds the number of bytes required to align a
+?S: double. Usual values are 2, 4 and 8.
+?X: This used to be called ALIGNBYTES, but that conflicts with
+?X: <machines/param.h> in NetBSD.
+?C: This symbol contains the number of bytes required to align a
+?C: double. Usual values are 2, 4 and 8.
+?H:#define MEM_ALIGNBYTES $alignbytes /**/
+: check for alignment requirements
+echo " "
+case "$alignbytes" in
+'') echo "Checking alignment constraints..." >&4
+ $cat >try.c <<'EOCP'
+struct foobar {
+ char foo;
+ double bar;
+} try;
+ printf("%d\n", (char *)& - (char *)&;
+ if $cc $ccflags try.c -o try >/dev/null 2>&1; then
+ dflt=`./try`
+ else
+ dflt='8'
+ echo"(I can't seem to compile the test program...)"
+ fi
+ ;;
+*) dflt="$alignbytes"
+ ;;
+rp="Doubles must be aligned on a how-many-byte boundary?"
+. ./myread
+$rm -f try.c try