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re PR other/8947 (Please add a Warning about "-malign-double" in docs)

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2003-01-07  Janis Johnson  <janis187@us.ibm.com>

	PR other/8947
	* doc/invoke.texi (-malign-double): Explain that the option breaks
	binary compatibility.

From-SVN: r61028
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Janis Johnson
2003-01-08 01:17:11 +00:00
committed by Janis Johnson
parent 8ed975d7e6
commit 892e7ea839
2 changed files with 12 additions and 4 deletions
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6
gcc/ChangeLog
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@@ -1,3 +1,9 @@
2003-01-07 Janis Johnson <janis187@us.ibm.com>
PR other/8947
* doc/invoke.texi (-malign-double): Explain that the option breaks
binary compatibility.
2003-01-07 Benjamin Kosnik <bkoz@redhat.com>
Sunil Davasam <sunil.k.davasam@intel.com>

10
gcc/doc/invoke.texi
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@@ -1,12 +1,12 @@
@c Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
@c 2000, 2001, 2002 Free Software Foundation, Inc.
@c 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
@c This is part of the GCC manual.
@c For copying conditions, see the file gcc.texi.
@ignore
@c man begin COPYRIGHT
Copyright @copyright{} 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997,
1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.1 or
@@ -7497,9 +7497,11 @@ boundary. Aligning @code{double} variables on a two word boundary will
produce code that runs somewhat faster on a @samp{Pentium} at the
expense of more memory.
@strong{Warning:} if you use the @samp{-malign-double} switch,
@strong{Warning:} if you use the @option{-malign-double} switch,
structures containing the above types will be aligned differently than
the published application binary interface specifications for the 386.
the published application binary interface specifications for the 386
and will not be binary compatible with structures in code compiled
without that switch.
@item -m128bit-long-double
@opindex m128bit-long-double