Issue #3815 has been updated by Hiroshi NAKAMURA.

Category changed from ext to test
Status changed from Rejected to Open
Priority changed from Normal to Low

Thank you! Passing a double value to C function does not work on x86_64, right?

I reopen this ticket since we'd better add some tweaks.
Document, adding warnings, avoid tests, etc.
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http://redmine.ruby-lang.org/issues/show/3815

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