Nikita Vetoshkin created MESOS-1010:
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Summary: Undefined symbol in Python extension
Key: MESOS-1010
URL: https://issues.apache.org/jira/browse/MESOS-1010
Project: Mesos
Issue Type: Bug
Components: build, python api
Environment: Fedora 20, amd64. GCC: 4.8.2.
Reporter: Nikita Vetoshkin
In my environment mesos build from master results in broken python api module
{{_mesos.so}}:
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nekto0n@ya-darkstar ~/workspace/mesos/src/python $
PYTHONPATH=build/lib.linux-x86_64-2.7/ python -c "import _mesos"
Traceback (most recent call last):
File "<string>", line 1, in <module>
ImportError:
/home/nekto0n/workspace/mesos/src/python/build/lib.linux-x86_64-2.7/_mesos.so:
undefined symbol: _ZN6google14FlagRegistererC1EPKcS2_S2_S2_PvS3_
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Unmangled version of symbol looks like this:
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google::FlagRegisterer::FlagRegisterer(char const*, char const*, char const*,
char const*, void*, void*)
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Digging a bit deeper into build process I found that {{gflags}} library is
dynamically linked and when autools(?) machinery assembles python library it
doesn't mention {{-lgflags}}:
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g++ -pthread -shared -Wl,-z,relro,--export-dynamic
build/temp.linux-x86_64-2.7/native/mesos_executor_driver_impl.o
build/temp.linux-x86_64-2.7/native/proxy_scheduler.o
build/temp.linux-x86_64-2.7/native/proxy_executor.o
build/temp.linux-x86_64-2.7/native/mesos_scheduler_driver_impl.o
build/temp.linux-x86_64-2.7/native/module.o
/home/nekto0n/workspace/mesos/src/.libs/libmesos_no_3rdparty.a
/home/nekto0n/workspace/mesos/3rdparty/libprocess/3rdparty/protobuf-2.5.0/src/.libs/libprotobuf.a
/home/nekto0n/workspace/mesos/3rdparty/leveldb/libleveldb.a
/home/nekto0n/workspace/mesos/3rdparty/zookeeper-3.4.5/src/c/.libs/libzookeeper_mt.a
/home/nekto0n/workspace/mesos/3rdparty/libprocess/.libs/libprocess.a
/home/nekto0n/workspace/mesos/3rdparty/libprocess/3rdparty/glog-0.3.3/.libs/libglog.a
/home/nekto0n/workspace/mesos/3rdparty/libprocess/3rdparty/libev-4.15/.libs/libev.a
-L/usr/lib64 -L./src/.libs/ -lpython2.7 -o
build/lib.linux-x86_64-2.7/_mesos.so -lsasl2 -lcurl -lz -lrt -lunwind
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Simply adding this agrument fixes the issue:
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nekto0n@ya-darkstar ~/workspace/mesos/src/python $ ldd
build/lib.linux-x86_64-2.7/_mesos.so
...
libgflags.so.0 => /lib64/libgflags.so.0 (0x00007f0f07e1f000)
...
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