Error "lua: error loading module 'launchdarkly_server_sdk'" Lua SDK

Affected: Lua SDK, version 2.1.1

Symptoms

When compiling the Lua SDK, the following error appears:

lua: error loading module 'launchdarkly_server_sdk' from file '/usr/local/lib/lua/5.1/launchdarkly_server_sdk.so': /usr/local/lib/lua/5.1/launchdarkly_server_sdk.so: undefined symbol: _ZTVN10__cxxabiv117__class_type_infoE

Cause

The error undefined symbol: _ZTVN10__cxxabiv117__class_type_infoE indicates a missing C++ library, which typically arises when using the gcc compiler.

Solution

To resolve this error, follow these steps:

1. Update the C++ server to version 3.3.3.
2. Compile the library by using the scripts/get-cpp-sdk-locally.sh script from the luarocks package.
3. Add the following line to the rockspec file:
   

   libraries = {"launchdarkly-cpp-server","stdc++","boost_json","boost_url","ssl","crypto"}

4. Run the build command: 

   luarocks make launchdarkly-server-sdk-2.1.1-0.rockspec

5. Run the compiler.

Example:

g++ -O2 -fPIC -fpermissive -I/usr/local/openresty/luajit/include/luajit-2.1 -c launchdarkly-server-sdk.c -o launchdarkly-server-sdk.o -I/usr/local/include && \
g++ -std=c++11 -shared launchdarkly-server-sdk.o -L/usr/local/lib -Wl,-rpath,/usr/local/lib -llaunchdarkly-cpp-server && \

Resources

• Lua SDK reference