[Bug 215393] devel/boost-libs: bad encoding conversion with base iconv()

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=215393

--- Comment #12 from Tijl Coosemans <tijl at FreeBSD.org> ---
Created attachment 186721
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=186721&action=edit
boost.locale patch

(In reply to Jan Beich from comment #11)
If the input buffer is valid UTF-8 then POSIX says this:
> If iconv() encounters a character in the input buffer that is valid, but for
> which an identical character does not exist in the target codeset, iconv()
> shall perform an implementation-defined conversion on this character.

By default our iconv either replaces such characters with "?" or transliterates
them (e.g. "ĝ" becomes "^g").  GNU iconv returns an error in this case, which I
believe is not POSIX compliant.

The problem reported in this bug is in Boost itself.  Their use of
__ICONV_F_HIDE_INVALID on FreeBSD does not give the desired behaviour.  Please
try the attached patch.  Make sure your ports tree is at least r450634.

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