Question about ARM optimization settings

[J Sevy]

I'm compiling code for an ARM926EJ-S core, and had a question as to the difference in two possible optimization flag settings available in gcc 3.4:
-mcpu=arm926ejs
 and
-march=armv5te
Either applies to the core; which is preferable - i.e., which will generate code best optimized for this core - or are they equivalent?
Thanks,
 \
 Jon

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             Jonathan Sevy
 Geometric and Intelligent Computing Lab
           Drexel University
    http://gicl.cs.drexel.edu/sevy
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