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GCC 4.9 data alignment change, i386 & x86-64

From: Jordan Justen <jljusten at gmail dot com>
To: gcc-help at gcc dot gnu dot org
Date: Sat, 19 Jul 2014 17:57:53 -0700
Subject: GCC 4.9 data alignment change, i386 & x86-64
Authentication-results: sourceware.org; auth=none

For i386/x86-64, I noticed this change from 4.8 to 4.9:

$ echo "int a[0x20] = { 0 };" | gcc-4.8 -S -x c -o - - | grep align
  .align 32

$ echo "int a[0x20] = { 0 };" | gcc-4.9 -S -x c -o - - | grep align
  .align 64

Is it possible to get GCC 4.9 to limit the data alignment to 32?

Thanks,

-Jordan

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