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cmu-db / peloton

The Self-Driving Database Management System
http://pelotondb.io
Apache License 2.0
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Undefined reference to LockFreeArray #1358

Closed eloiseh closed 6 years ago

eloiseh commented 6 years ago

When we try to use LockFreeArray in transaction_manager.h, the linker throws undefined reference error. Any idea why would this happen?

../lib/libpeloton.so.0.0.5: error: undefined reference to 'peloton::LockFreeArray<unsigned long>::GetSize() const'
../lib/libpeloton.so.0.0.5: error: undefined reference to 'peloton::LockFreeArray<unsigned long>::Find(unsigned long const&) const'
../lib/libpeloton.so.0.0.5: error: undefined reference to 'peloton::LockFreeArray<unsigned long>::Contains(unsigned long const&)'
../lib/libpeloton.so.0.0.5: error: undefined reference to 'peloton::LockFreeArray<unsigned long>::Append(unsigned long)'
../lib/libpeloton.so.0.0.5: error: undefined reference to 'peloton::LockFreeArray<unsigned long>::Erase(unsigned long const&, unsigned long const&)'
../lib/libpeloton.so.0.0.5: error: undefined reference to 'peloton::LockFreeArray<unsigned long>::~LockFreeArray()'
../lib/libpeloton.so.0.0.5: error: undefined reference to 'peloton::LockFreeArray<unsigned long>::LockFreeArray()'
collect2: error: ld returned 1 exit status
src/CMakeFiles/peloton-bin.dir/build.make:153: recipe for target 'bin/peloton' failed
make[2]: *** [bin/peloton] Error 1
CMakeFiles/Makefile2:1241: recipe for target 'src/CMakeFiles/peloton-bin.dir/all' failed
make[1]: *** [src/CMakeFiles/peloton-bin.dir/all] Error 2
Makefile:138: recipe for target 'all' failed
make: *** [all] Error 2
eloiseh commented 6 years ago

You probably forget the explicit template instantiation. Can you try to add

template class LockFreeArray<unsigned long>;

at the end of lock_free_array.cpp and rerun cmake?