[VCDImager Bugs/Devel] vcdxbuild 0.7.10 incompatible with libxml2 version > 2.4.1.

[P.C. Chan]

Dear sir,

After upgrading libxml2 from 2.4.1 to 2.4.5/2.4.6, vcdxbuild from
vcdimager stopped working.

In xmlCreateFileParserCtxt() of parser.c of the newer libxml2 (2.4.2 or
above),  it invoked xmlExternalEntityLoader() (which was setup to
_xmlExternalEntityLoader() of frontends/xml/vcd_xml_dtd.c) with
parmeters pubid = NULL and sysid = filename.   It would failed the
stcmp's and vcdxbuild would terminate with unsupported doctype
encountered and failed to generate the bin and cue files.

After downgrading to 2.4.1 libxml2, vcdxbuild worked again.

Please look into the incompatibility.  Since vcdimager was setting up
xmlExternalEntityLoader, we probably can address the issue from the
vcdimager side.

Thanks,
P.C. Chan

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