[Clamav-devel] Problem compiling with libxml2 and Xcode 9

[Steven Morgan]

Mark,

The file config.log should contain the details of the configure test
performed for -lxml2.

Can you tell what are the relevant differences in those files?

Thanks,
Steve

On Tue, Oct 10, 2017 at 7:48 AM, Mark Allan <markjallan at gmail.com> wrote:

> Hi all,
>
> I just updated Xcode (Apple's developer tools for macOS) to version 9 and
> I'm no longer able to compile ClamAV 0.99.2 with libxml2 support.
>
> Here's the relevant output from the configure script:
>
> > ...
> > checking for libxml2 installation... /usr
> > checking xml2-config version... 2.9.4
> > checking for xmlreader.h in /usr... found
> > checking for xmlTextReaderRead in -lxml2... no
> > configure: ****** libxml2 support unavailable
> > ...
> > configure: Summary of engine detection features
> >               bzip2       : ok
> >               zlib        : /usr
> >               unrar       : yes
> >               pcre        : /usr/local/clamXav
> >               libxml2     : no
> >               yara        : yes
>
> I'm aware that things tend to break when updating Xcode, so I did this
> test in a virtual machine, which means I can say with certainty that the
> devtools are the only things to have changed. If I revert to the snapshot
> with Xcode 8.3, the configure script finds everything it needs to within
> /usr:
>
> > ...
> > checking for libxml2 installation... /usr
> > checking xml2-config version... 2.9.4
> > checking for xmlreader.h in /usr... found
> > checking for xmlTextReaderRead in -lxml2... yes
> > configure: Compiling and linking with libxml2 from /usr
> > ...
> > configure: Summary of engine detection features
> >               bzip2       : ok
> >               zlib        : /usr
> >               unrar       : yes
> >               pcre        : /usr/local/clamXav
> >               libxml2     : yes, from /usr
> >               yara        : yes
>
> If I update again (or go back to the snapshot with Xcode 9) it fails.
>
> I've compared the checksums of the libraries in /usr/lib/libxml2.* and
> they're identical before and after the upgrade. Similarly, diffing the
> contents of /usr/include/libxml2/libxml shows they're exactly the same too,
> so I'm not quite sure what's going on.
>
> Can anyone help shed some light on the matter please?
>
> Many thanks
> Mark
>
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