Missing symbol in jsoncpp 1.9.8

[dmnewber]

Describe the bug
jsoncpp 1.9.8 is missing symbol _ZN4Json5Value12removeMemberESt17basic_string_viewIcSt11char_traitsIcEE, which is breaking my build of NFS Ganesha.

To Reproduce
Steps to reproduce the behavior:

1. Present in 1.9.7:

root@ccc0a02ae202:/jsoncpp-build-1.9.7# nm -D bin/jsoncpp_test | grep '_ZN4Json5Value12removeMemberESt17basic_string_viewIcSt11char_traitsIcEE'
                 U _ZN4Json5Value12removeMemberESt17basic_string_viewIcSt11char_traitsIcEE
                 U _ZN4Json5Value12removeMemberESt17basic_string_viewIcSt11char_traitsIcEEPS0_

2. Missing in 1.9.8:

root@ccc0a02ae202:/jsoncpp-build-1.9.8# nm -D bin/jsoncpp_test | grep '_ZN4Json5Value12removeMemberESt17basic_string_viewIcSt11char_traitsIcEE'
root@ccc0a02ae202:/jsoncpp-build-1.9.8# 

Expected behavior
I expect for function to not be removed.

Desktop (please complete the following information):

• OS: Ubuntu
• Meson version 1.10.1
• Ninja version N/A

Additional context
Encountered a cmake error while building NFS Ganesha 9.11:

cmake: symbol lookup error: cmake: undefined symbol: _ZN4Json5Value12removeMemberESt17basic_string_viewIcSt11char_traitsIcEE

Build works with jsoncpp 1.9.7, breaks with 1.9.8.

[baylesj]

This is an SOVERSION issue, my apologies. Previous feedback has been that we were too aggressive at updating SOVERSION, and in response I started trying to be more conservative about SOVERSION updates, saving them for releases with actual breaking changes.

In this case, I was too conservative for the 1.9.8 release. This will be fixed moving forward with an SOVERSION bump.

[baylesj]

I opened PR #1697 for the SOVERSION bump. Good news, there is a workaround until 1.10.0 releases:

1. Rebuild the affected consumer against the installed jsoncpp. Recompiling cmake / NFS Ganesha against the current (1.9.8/1.9.9) headers makes Value::removeMember(std::string_view) inline into the consumer and the undefined symbol disappears. This is the actual resolution and works today.
2. Or pin jsoncpp to 1.9.7 (the last version that exported the symbol) until that rebuild can happen — e.g. hold the system libjsoncpp.so.27 from 1.9.7 in place.
3. Last resort only: rebuild jsoncpp 1.9.x from source with those methods forced out-of-line to restore the symbol — but that reintroduces the Fix string_view ABI mismatch between library and consumers #1661 C++11/C++17 mismatch, so I wouldn't recommend it.

[dmnewber]

Thanks for the quick turn around! My builds are working with the package version pinned to 1.9.7.