Preventing gcc from aligning stack???

Michael Meissner meissner en cygnus.com
Mie Ene 26 20:41:26 CST 2000


On Wed, Jan 26, 2000 at 02:19:35PM +0100, Jamie Lokier wrote:
> David Weinehall wrote:
> > > > sched.c:77: warning: alignment of `aligned_data' is greater than maximum
> > > > object file alignment
> > > 
> > > That's not i386 is it?
> > 
> > 486.

It doesn't matter which machine is chosen (the machine type only sets the
default alignments).  I believe the original problem is for System V.4 targets
(Linux ELF is a SVR4 target) in 2.7.2.3 did not set MAX_OFILE_ALIGNMENT, which
meant that the compiler assumed that the maximum alignment was 4 or 8 bytes.
Under 2.95 and beyond, the compiler knows you can specify higher alignments.

-- 
Michael Meissner, Red Hat, Inc.
PMB 198, 174 Littleton Road #3, Westford, Massachusetts 01886
Work:	  meissner en redhat.com		phone: 978-486-9304 fax: 978-692-4482
Non-work: meissner en spectacle-pond.org

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