Stop using xercesc3

[ryandesign (Ryan Carsten Schmidt)]

​The developer of xercesc3 gives notice that it should not be used anymore:

I'd strongly advise pulling or at least deprecating (don't know the official process) all the Macports relying on Xerces, they're all at risk using this code or Xalan. I am the last maintainer left, I don't support the Mac for my own software anymore, and once I'm fully off Xerces in a few years, I seriously doubt it has a future unless somethiing changes.

Whatever the official process is for retiring ports, I would be getting the crank turning on that.

Please try to remove the xercesc3 dependency from your ports. If it is a mandatory dependency, please work with the upstream developers to get it removed from their code.

[scantor (Scott Cantor)]

Notably regarding a few of mine:

• xml-security-c is officially retired as an Apache code base. It was forked for private use by the Shibboleth Project

• All the Shibboleth Project ports (xmltooling, opensaml, shibboleth) are in their wind-down phase and will be replaced and go out of support by late this decade

None of that code is really supported for the Mac now, as of a few years back, that's why I haven't been maintaining those ports very actively.

I will open a similar ticket to this one against all those ports now that I know that's appropriate to do.

[ryandesign (Ryan Carsten Schmidt)]

Yes please! We don't want MacPorts to be a museum, but we also don't want to just remove a port that others still depend on, so it can take some work before an old library can be removed.

[ryandesign (Ryan Carsten Schmidt)]

In c6a4e33d8cf123cef4b0343082303ac3a72f5b66/macports-ports (master):

xercesc3: deprecated

See: #71310

[ryandesign (Ryan Carsten Schmidt)]

• aircraft_oap requires xerces-c: ​https://github.com/NCAR/aircraft_oap/issues/4
• enigma requires xerces-c: ​https://github.com/Enigma-Game/Enigma/issues/99

[paumard]

Gyoto can be built without xerces-c but with a severe cost on functionality: ​https://github.com/gyoto/Gyoto/issues/25

[ryandesign (Ryan Carsten Schmidt)]

In e30d6c1b19b62c86038215b74c0bd47ce116ef4e/macports-ports (master):

cegui: Stop using xercesc3

See: #71310

[ryandesign (Ryan Carsten Schmidt)]

In e57c4970a6cfae882dd871501343092916cb7ebf/macports-ports (master):

zorba: Stop using xercesc3

See: #71310

[remkos (Remko Scharroo)]

I submitted a PR (​https://github.com/macports/macports-ports/pull/26678) to remove xercesc3 from the nco port.