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Simplified hardware model testing.
Even smarter compiler option generation using sysctl and new GCC 4.2 features.
Get processor count from sysctl and thus remove our dependency on RubyCocoa.
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Saves building our own tool to do the same job!
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I confirmed this change with all relevant contributors first.
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Signed-off-by: Max Howell <max@methylblue.com>
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This is consistent with the other HOMEBREW_* path constants
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Closes Homebrew/homebrew#7
Cache directory is created when downloading tarballs, but the new
hw.model stuff compiles the hw.model.c file there.
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We call sysctl to determine which exact Mac model we are running on and
optimize as well as possible.
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