[m-rev.] for review: work around bug 160

[Zoltan Somogyi]

On 11-Sep-2010, Peter Ross <pdross at gmail.com> wrote:
> Agree the workaround is simple, the issue is determining that you need
> to apply the work around because as I understand it your program
> silently does the wrong thing.

We should auto-detect in configure whether the version of gcc being used has
the -fno-tree-loop-im flag, and if yes, set it. Preferably only on the gcc
versions that have the bug, but if we don't know exactly what they are,
we can do this for all of them.

Zoltan.
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