[RFC] Use -mtune= instead of -mcpu=

[Ulrich Drepper]

Jakub Jelinek wrote:

> GCC <= 3.3.x use -mcpu=, while 3.4.x+ uses -mtune=.

We'll just bump the gcc version requirement to 3.4 and unconditionally
change to -mtune.  3.4 is stable, there is no reason for anybody to not
use that compiler.

--
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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