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https://issues.apache.org/jira/browse/STDCXX-423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12568352#action_12568352
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Martin Sebor commented on STDCXX-423:
-------------------------------------
For some background on the issue read this discussion on [Padding
Bits|http://groups.google.com/group/comp.lang.c/browse_thread/thread/7839f3bf59637b85]
on [comp.lang.c|http://groups.google.com/group/comp.lang.c].
> LIMITS.cpp assumes integers with no padding bits
> ------------------------------------------------
>
> Key: STDCXX-423
> URL: https://issues.apache.org/jira/browse/STDCXX-423
> Project: C++ Standard Library
> Issue Type: Bug
> Components: Configuration
> Affects Versions: 4.1.2, 4.1.3, 4.2.0
> Environment: unknown
> Reporter: Martin Sebor
> Priority: Trivial
> Fix For: 4.2.1
>
>
> The LIMITS.cpp config test tries to determine exact-width integer typese (the
> equivalent of things such as int32_t) but it fails to consider the fact that
> all integer types other than unsigned char may have padding bits that
> contribute to their size but not to their range (i.e., there may be two or
> more distinct bit patters that represent the same value, or bit patterns that
> do not correspond to any value at all). This is only an issue in theory since
> we know of no architecture with such a representation.
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