Re: libxml2-2.10.3-1.fc36 breaks (part of) GraphicsMagick

[Mamoru TASAKA]

Michael J Gruber wrote on 2022/10/29 5:19:
>  With this libxml2 update:
>  ```
>  gm convert -list format
>  ...
>  gm convert: Unable to load module
> ("/usr/lib64/GraphicsMagick-1.3.38/modules-Q16/coders/url.la: file not found")
>  ```
>  In fact, `url.so` is there but cannot be dlopen'ed. This works after downgrading
> libxml2 to 2.9.
>  I noticed because my scribus failed to start today, and this was somehow tough to track
> down.
>  I still don't know whether libxml2 had an abi change without soname bump and whether
> a simple rebuild of GM would solve this (in particular, which one to file a big against).
> But since it was diificult to spot and more packages could be broken (without a clear
> FTI/FTBFS) I wanted to give a heads up here. 

Confirmed, as I've noticed that now rubygem-rmagick is now FTBFS.
So I tried narrowing the issue and the minimum reproducer is:

$ ldd -r /usr/lib64/ImageMagick-6.9.12/modules-Q16/coders/url.so  | grep undefined
undefined symbol: xmlNanoFTPInit, version
LIBXML2_2.4.30	(/usr/lib64/ImageMagick-6.9.12/modules-Q16/coders/url.so)
undefined symbol: xmlNanoFTPClose, version
LIBXML2_2.4.30	(/usr/lib64/ImageMagick-6.9.12/modules-Q16/coders/url.so)
undefined symbol: xmlNanoFTPGet, version
LIBXML2_2.4.30	(/usr/lib64/ImageMagick-6.9.12/modules-Q16/coders/url.so)
undefined symbol: xmlNanoFTPNewCtxt, version
LIBXML2_2.4.30	(/usr/lib64/ImageMagick-6.9.12/modules-Q16/coders/url.so)
undefined symbol: xmlNanoFTPConnect, version
LIBXML2_2.4.30	(/usr/lib64/ImageMagick-6.9.12/modules-Q16/coders/url.so)

(i.e. ImageMagick is now broken)

This is perhaps due to the following change:
https://gitlab.gnome.org/GNOME/libxml2/-/commit/a0a0f3be93753e387e31e7de9...

... and in fact lots of other symbols are also removed...

$ rpmsodiff libxml2-2.9.14-3.fc37.x86_64.rpm libxml2-2.10.3-1.fc37.x86_64.rpm | grep
"^-"
--- libxml2-2.9.14-3.fc37/libxml2.so.2	2022-07-22 05:06:27.000000000 +0900
-__docbDefaultSAXHandler	T
-attribute@(a)LIBXML2_2.4.30	T
-attributeDecl@(a)LIBXML2_2.4.30	T
-cdataBlock@(a)LIBXML2_2.4.30	T
-characters@(a)LIBXML2_2.4.30	T
-checkNamespace@(a)LIBXML2_2.4.30	T
-comment@(a)LIBXML2_2.4.30	T
-docbDefaultSAXHandler@(a)LIBXML2_2.4.30	D
-docbDefaultSAXHandlerInit@(a)LIBXML2_2.4.30	T
-elementDecl@(a)LIBXML2_2.4.30	T
-endDocument@(a)LIBXML2_2.4.30	T
-endElement@(a)LIBXML2_2.4.30	T
-entityDecl@(a)LIBXML2_2.4.30	T
-externalSubset@(a)LIBXML2_2.4.30	T
-getColumnNumber@(a)LIBXML2_2.4.30	T
-getEntity@(a)LIBXML2_2.4.30	T
-getLineNumber@(a)LIBXML2_2.4.30	T
-getNamespace@(a)LIBXML2_2.4.30	T
-getParameterEntity@(a)LIBXML2_2.4.30	T
-getPublicId@(a)LIBXML2_2.4.30	T
-getSystemId@(a)LIBXML2_2.4.30	T
-globalNamespace@(a)LIBXML2_2.4.30	T
-hasExternalSubset@(a)LIBXML2_2.4.30	T
-hasInternalSubset@(a)LIBXML2_2.4.30	T
-htmlDecodeEntities	T
-ignorableWhitespace@(a)LIBXML2_2.4.30	T
-initdocbDefaultSAXHandler@(a)LIBXML2_2.4.30	T
-inithtmlDefaultSAXHandler@(a)LIBXML2_2.4.30	T
-initxmlDefaultSAXHandler@(a)LIBXML2_2.4.30	T
-internalSubset@(a)LIBXML2_2.4.30	T
-isStandalone@(a)LIBXML2_2.4.30	T
-namespaceDecl@(a)LIBXML2_2.4.30	T
-notationDecl@(a)LIBXML2_2.4.30	T
-processingInstruction@(a)LIBXML2_2.4.30	T
-reference@(a)LIBXML2_2.4.30	T
-resolveEntity@(a)LIBXML2_2.4.30	T
-setDocumentLocator@(a)LIBXML2_2.4.30	T
-setNamespace@(a)LIBXML2_2.4.30	T
-startDocument@(a)LIBXML2_2.4.30	T
-startElement@(a)LIBXML2_2.4.30	T
-unparsedEntityDecl@(a)LIBXML2_2.4.30	T
-xmlBufAddHead	T
-xmlBufErase	T
-xmlBufInflate	T
-xmlBufWriteCHAR	T
-xmlBufWriteChar	T
-xmlCleanupPredefinedEntities@(a)LIBXML2_2.4.30	T
-xmlDecodeEntities@(a)LIBXML2_2.4.30	T
-xmlEncodeEntities@(a)LIBXML2_2.4.30	T
-xmlGetFeature@(a)LIBXML2_2.4.30	T
-xmlGetFeaturesList@(a)LIBXML2_2.4.30	T
-xmlHandleEntity@(a)LIBXML2_2.4.30	T
-xmlIOFTPClose@(a)LIBXML2_2.4.30	T
-xmlIOFTPMatch@(a)LIBXML2_2.4.30	T
-xmlIOFTPOpen@(a)LIBXML2_2.4.30	T
-xmlIOFTPRead@(a)LIBXML2_2.4.30	T
-xmlInitializePredefinedEntities@(a)LIBXML2_2.4.30	T
-xmlNamespaceParseNCName@(a)LIBXML2_2.4.30	T
-xmlNamespaceParseNSDef@(a)LIBXML2_2.4.30	T
-xmlNamespaceParseQName@(a)LIBXML2_2.4.30	T
-xmlNanoFTPCheckResponse@(a)LIBXML2_2.4.30	T
-xmlNanoFTPCleanup@(a)LIBXML2_2.4.30	T
-xmlNanoFTPClose@(a)LIBXML2_2.4.30	T
-xmlNanoFTPCloseConnection@(a)LIBXML2_2.4.30	T
-xmlNanoFTPConnect@(a)LIBXML2_2.4.30	T
-xmlNanoFTPConnectTo@(a)LIBXML2_2.4.30	T
-xmlNanoFTPCwd@(a)LIBXML2_2.4.30	T
-xmlNanoFTPDele@(a)LIBXML2_2.5.5	T
-xmlNanoFTPFreeCtxt@(a)LIBXML2_2.4.30	T
-xmlNanoFTPGet@(a)LIBXML2_2.4.30	T
-xmlNanoFTPGetConnection@(a)LIBXML2_2.4.30	T
-xmlNanoFTPGetResponse@(a)LIBXML2_2.4.30	T
-xmlNanoFTPGetSocket@(a)LIBXML2_2.4.30	T
-xmlNanoFTPInit@(a)LIBXML2_2.4.30	T
-xmlNanoFTPList@(a)LIBXML2_2.4.30	T
-xmlNanoFTPNewCtxt@(a)LIBXML2_2.4.30	T
-xmlNanoFTPOpen@(a)LIBXML2_2.4.30	T
-xmlNanoFTPProxy@(a)LIBXML2_2.4.30	T
-xmlNanoFTPQuit@(a)LIBXML2_2.4.30	T
-xmlNanoFTPRead@(a)LIBXML2_2.4.30	T
-xmlNanoFTPScanProxy@(a)LIBXML2_2.4.30	T
-xmlNanoFTPUpdateURL@(a)LIBXML2_2.4.30	T
-xmlNewGlobalNs@(a)LIBXML2_2.4.30	T
-xmlParseNamespace@(a)LIBXML2_2.4.30	T
-xmlParseQuotedString@(a)LIBXML2_2.4.30	T
-xmlParserHandleReference@(a)LIBXML2_2.4.30	T
-xmlSAX2InitDocbDefaultSAXHandler@(a)LIBXML2_2.6.0	T
-xmlScanName@(a)LIBXML2_2.4.30	T
-xmlSetEntityReferenceFunc@(a)LIBXML2_2.4.30	T
-xmlSetFeature@(a)LIBXML2_2.4.30	T
-xmlUpgradeOldNs	T
-xmlXPtrAdvanceNode	T
-xmlXPtrBuildNodeList@(a)LIBXML2_2.4.30	T
-xmlXPtrEvalRangePredicate@(a)LIBXML2_2.4.30	T
-xmlXPtrFreeLocationSet@(a)LIBXML2_2.4.30	T
-xmlXPtrLocationSetAdd@(a)LIBXML2_2.4.30	T
-xmlXPtrLocationSetCreate@(a)LIBXML2_2.4.30	T
-xmlXPtrLocationSetDel@(a)LIBXML2_2.4.30	T
-xmlXPtrLocationSetMerge@(a)LIBXML2_2.4.30	T
-xmlXPtrLocationSetRemove@(a)LIBXML2_2.4.30	T
-xmlXPtrNewCollapsedRange@(a)LIBXML2_2.4.30	T
-xmlXPtrNewLocationSetNodeSet@(a)LIBXML2_2.4.30	T
-xmlXPtrNewLocationSetNodes@(a)LIBXML2_2.4.30	T
-xmlXPtrNewRange@(a)LIBXML2_2.4.30	T
-xmlXPtrNewRangeNodeObject@(a)LIBXML2_2.4.30	T
-xmlXPtrNewRangeNodePoint@(a)LIBXML2_2.4.30	T
-xmlXPtrNewRangeNodes@(a)LIBXML2_2.4.30	T
-xmlXPtrNewRangePointNode@(a)LIBXML2_2.4.30	T
-xmlXPtrNewRangePoints@(a)LIBXML2_2.4.30	T
-xmlXPtrRangeToFunction@(a)LIBXML2_2.4.30	T
-xmlXPtrWrapLocationSet@(a)LIBXML2_2.4.30	T

I think libxml2 2.10.x (with current configuration) should not have brought into
F37/36/35 branches. Currently at least the following action is required.

* Either rebuilding all packages requiring the above symbol
* Or fixing libxml2 2.10.x
* Or introduce epoch on libxml2 and downgrade to 2.9.x

Regards,
Mamoru