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From Peter Kelly <>
Subject Re: libxml2 and iconv question, do we really need iconv ?
Date Mon, 23 Mar 2015 14:31:09 GMT
Also I just realised that SDL2, SDL2_image, and even zlib are in 3rd party. This brings the
total size of our source tree to 165 mb. Before that it was 41 Mb. Could we *please* not have
these in there?

Dennis raised the point previously about it being a bad idea to provide our own binary distributions
of these libraries - a point I disagreed with (I think it is useful to do so, for convenience
purposes). But I definitely think the sources to other projects do not belong in our own repository.
The issues of size (medium) and responsibility for updating after security vulnerabilities
are found in these (major) are the main reasons for my objection, but another minor one is
that these are not Apache licensed.

Dr Peter M. Kelly

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(fingerprint 5435 6718 59F0 DD1F BFA0 5E46 2523 BAA1 44AE 2966)

> On 23 Mar 2015, at 9:04 pm, Peter Kelly <> wrote:
> (apologies if this is duplicated; I sent from the wrong address before)
> I have about 70% of an XML parser done that I haven’t gotten around to finishing yet.
Once that’s completed, we don’t need libxml. I can’t remember if we need iconv; it’s
used for character set conversions but DocFormats is UTF-8 native (as is libxml), and support
for UTF-16 would not be hard (if it’s even needed).
> I would strongly argue against keeping sources of libraries in our repositories except
in the case where we have made changes to those libraries. If we do that we have to include
all of SDL_image and thus all of SDL, and that leads to quite a big repository. The same goes
for libz etc. Most projects have lots and lots of dependencies and are handled just fine by
standard package dependency systems e.g. apt-get.
> Furthermore, we want to use the system libxml where available, both to take advantage
of shared libraries (libxml only needs to exist in memory once, the OS maps it into the address
space of each process that uses it), and for security updates (system libxml updated due to
vulnerability, programs using DocFormats are still vulnerable until we go and update our own
> —
> Dr Peter M. Kelly
> PGP key: <>
> (fingerprint 5435 6718 59F0 DD1F BFA0 5E46 2523 BAA1 44AE 2966)
>> On 23 Mar 2015, at 3:29 pm, jan i <> wrote:
>> Hi.
>> I am nearly finished with the x64 port for windows, I have compiled all
>> libraries we need.
>> I wanted to see if we could keep the library sources in our Repo, and
>> integrate them in our build
>> system, as it would simplify things. Since I am biased I asked on
>> general@i.a.o to get the opinion
>> of outside Mentors. I got a few responses (strangely enough all in
>> private), and it turns out many projects do as I suggest.
>> However one of the others mentors found a license problem with iconv. We do
>> not use iconv, but by default libxml2 does. I can configure libxml2 not to
>> include iconv, but I wanted to ask in here, if we need the functionality ?
>> If not my plan has changed a bit, and I will include the sources in
>> platform, make a single commit with each original source, noting the URL
>> and version in the commit text (and add it to LICENSE). Then I will add my
>> changes, which will be solely CMAKE files NO source changes.
>> Having the source in our build system, will also allow us to decide how to
>> handle other platforms.
>> Rgds
>> jan I.

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