* [c914617]->[34d3cce] ansi-c++-opt: Interoperability with libtool.
* [3f9fff2]->[0bd455a] careadlinkat: Avoid mismatch between ssize_t and int.
* [c224523]->[5c698ae] canonicalize-lgpl: work around AIX realpath bug
+ * [79aac72]->[cc1a9b7] canonicalize-lgpl: use common idiom
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