Re: Snort vs. gcc 4.1.0

[Allen McIntosh <mcintosh () research telcordia com>]

Allen McIntosh wrote:
> Snort and gcc 4.1.0 don't get along.

A little further investigation shows that -fno-strict-aliasing makes the 
problem go away.  Without it, the compiler thinks that "ph" and 
references to h[] in the expansion of in_chksum_tcp() do not point to 
the same memory.  The fetch of h[3] gets moved ahead of the store to 
ph.dip, and Bad Things ensue.


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