Getting duplicate libxml2 symbols trying to link librsslVA from ETA 2.2.x

ericp

Hi all:

I am using RHEL8 and GCC8, statically linking ETA and libxml2.

I'm trying to build a sample application using ETA 2.2.3 and libxml2. When linking I am getting duplicate symbols errors like

/opt/rh/gcc-toolset-11/root/usr/bin/ld: /userhome/epederson/.conan/data/libxml2/2.13.5///package/a0eb883ef4c5f6bbed8510d21145a7b12bd3ce89/lib/libxml2.a(libxml2_la-globals.o): in function xmlInitGlobals':
/userhome/epederson/.conan/data/libxml2/2.13.5/_/_/build/a0eb883ef4c5f6bbed8510d21145a7b12bd3ce89/src/globals.c:560: multiple definition of xmlInitGlobals'; /userhome/epederson/.conan/data/rtsdk-eta/2.2.3/third-party/stable/package/86623287cb17dedcf3a3860ff0bc96052d3e2443/lib/librsslVA.a(libxml2_la-globals.o):globals.c:(.text+0x1a): first defined here

That is one of many such duplicate symbols. When looking at librssVA.a (Specifically ./Cpp-C/Eta/Libs/RHEL8_64_GCC831/Optimized/librsslVA.a), I see that does define the duplicate symbols. For example:

$ nm --defined-only librsslVA.a | grep xmlInitGlobals
000000000000001a T xmlInitGlobals
0000000000000026 T xmlInitGlobalsInternal

When checking the contents of librsslVA.a it appears that somehow the libxml2 object files have been included. For example:

$ ar t librsslVA.a | grep libxml2
libxml2_la-buf.o
libxml2_la-c14n.o
libxml2_la-catalog.o
libxml2_la-chvalid.o
libxml2_la-debugXML.o
libxml2_la-dict.o
libxml2_la-encoding.o
libxml2_la-entities.o
libxml2_la-error.o
libxml2_la-globals.o
libxml2_la-hash.o
libxml2_la-HTMLparser.o
libxml2_la-HTMLtree.o
libxml2_la-list.o
libxml2_la-parserInternals.o
libxml2_la-parser.o
libxml2_la-pattern.o
libxml2_la-relaxng.o
libxml2_la-SAX2.o
libxml2_la-schematron.o
libxml2_la-threads.o
libxml2_la-tree.o
libxml2_la-uri.o
libxml2_la-valid.o
libxml2_la-xinclude.o
libxml2_la-xlink.o
libxml2_la-xmlIO.o
libxml2_la-xmlmemory.o
libxml2_la-xmlmodule.o
libxml2_la-xmlreader.o
libxml2_la-xmlregexp.o
libxml2_la-xmlsave.o
libxml2_la-xmlschemas.o
libxml2_la-xmlschemastypes.o
libxml2_la-xmlstring.o
libxml2_la-xmlunicode.o
libxml2_la-xmlwriter.o
libxml2_la-xpath.o
libxml2_la-xpointer.o

Is this intentional? Is it possible to use both libxml2 and librsslVA in the same program? What is the intention of librsslVA versus librssl?

Thanks,

Jirapongse

@ericp

Thank you for reaching out to us.

I will contact the product team to verify if the libxml2 is really required by the librsslVA.

For now, you may try to link the application with the shared library (librsslVA.so) instead.

The librsslVA is a value added layer built on top of librssl to simplify and compliment the use of the Enterprise Transport API. It provided additional functionalities, such as a connection managment and administration domain model representations.