[llvm-dev] [RFC] Adding a char set converter to Support library

[Kai Peter Nacke via llvm-dev]

I see that there is a great emphasis on deterministic behavior on all 
platforms.
I'll update my code accordingly, as there is no need to have more 
conversions right now.
It also make the change much smaller.

Thanks for all the comments!

Regards,
Kai

Chris Tetreault <ctetreau at quicinc.com> wrote on 05.10.2020 19:27:11:

> Kai,
> 
>    I added some comments to your patch, but my main takeaway is that
> I think the iconv dependency should probably be removed regardless 
> of license uncertainty. I think we should define a set of 
> conversions that we support and only support those. If 
> convertWithTable is good enough for us, then we don't need iconv. 
> From what I can tell by reading the code, iconv provides the 
> possibility of supporting additional conversions. However, if 
> CharSetConverter::create can return a converter on one person's 
> machine, but not mine because I don't have an optional dependency 
> installed, that's going to be very annoying.
> 
> Thanks,
>    Christopher Tetreault
> 
> -----Original Message-----
> From: llvm-dev <llvm-dev-bounces at lists.llvm.org> On Behalf Of Kai 
> Peter Nacke via llvm-dev
> Sent: Friday, October 2, 2020 10:45 AM
> To: Anton Korobeynikov <anton at korobeynikov.info>
> Cc: llvm-dev <llvm-dev at lists.llvm.org>; Yusra Syeda 
<Yusra.Syeda at ibm.com>
> Subject: [EXT] Re: [llvm-dev] [RFC] Adding a char set converter to 
> Support library
> 
> My understanding is that dynamically linking should pose no problem,
> but I am no lawyer. On Linux, glibc is also under LGPL license, and 
> LLVM usually links against it.
> (There is really no need for us to depend on libiconv. If it is 
> deemed to risky, then I can dropped it.)
> 
> 
> 
> From:   Anton Korobeynikov <anton at korobeynikov.info>
> To:     Kai Peter Nacke <kai.nacke at de.ibm.com>
> Cc:     llvm-dev <llvm-dev at lists.llvm.org>, Yusra Syeda
> <Yusra.Syeda at ibm.com>
> Date:   02.10.2020 19:08
> Subject:        [EXTERNAL] Re: [llvm-dev] [RFC] Adding a char set
> converter to Support library
> 
> 
> 
> As far as I remember, libiconv is under LGPL. Will this cause any 
troubles?
> 
> On Fri, Oct 2, 2020 at 7:13 PM Kai Peter Nacke via llvm-dev <llvm-
> dev at lists.llvm.org> wrote:
> >
> > Hi!
> >
> > On z/OS, there is the need to convert strings from EBCDIC to UTF-8 and
> > vice versa.
> > Using the POSIX iconv functions has some challenges, so I created a
> small
> > wrapper
> > around this functionality to get the same result on all platforms.
> > This functionality is required for reading and writing GOFF object
> > files and can also be
> used
> > in the
> > frontend.
> > I put up the code on Phabricator
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> . Please
> > add your
> > comments to the review if you are interested in this topic.
> >
> > Best regards,
> > Kai
> >
> > Kai Nacke
> > IT Architect
> >
> > IBM Deutschland GmbH
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> 
> 
> 
> --
> With best regards, Anton Korobeynikov
> Department of Statistical Modelling, Saint Petersburg State University
> 
> 
> 
> 
> 
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