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svn fails: undefined reference to libdl.so.2

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Mon, 10/11/2010 - 15:43
#1
seandarcy
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svn fails: undefined reference to libdl.so.2

Same type of problem as in previous post, but now I hope I'm in the correct church.

http://www.kdenlive.org/forum/svn-fails-testlensiface-has-undefined-refe...

Building today's svn:

/usr/bin/ld: CMakeFiles/kdenlive.dir/blackmagic/include/DeckLinkAPIDispatch.o: undefined reference to symbol 'dlsym@@GLIBC_2.2.5'
/usr/bin/ld: note: 'dlsym@@GLIBC_2.2.5' is defined in DSO /lib64/libdl.so.2 so try adding it to the linker command line
/lib64/libdl.so.2: could not read symbols: Invalid operation

sean

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Mon, 10/11/2010 - 16:42
#2
j-b-m
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Re: svn fails: undefined reference to libdl.so.2

Which system do you have? Are you compiling on a Mac?

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Mon, 10/11/2010 - 17:04
#3
seandarcy
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Re: svn fails: undefined reference to libdl.so.2

No. Fedora 13. cmake-2.8.0-3.fc13.x86_64

This arises because Fedora no longer permits implicit linking. See:
https://fedoraproject.org/wiki/UnderstandingDSOLinkChange

Note that ld does know where to find the reference, it just won't do it because it's not explicitly linked. And I don't know enough cmake to specify the link libraries.

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Mon, 10/11/2010 - 18:19
#4
seandarcy
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Re: svn fails: undefined reference to libdl.so.2

In src/CMakeLists.txt , added -ldl to LINK_LIBRARIES and to target_link_libraries.

Then it built.

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Mon, 10/11/2010 - 21:29
#5
j-b-m
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Re: svn fails: undefined reference to libdl.so.2

Ok, thanks. I applied a patch to update target_link_libraries, since it looks like link_libraries is now deprecated. Can you please test with latest svn?

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Mon, 10/11/2010 - 22:04
#6
seandarcy
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Re: svn fails: undefined reference to libdl.so.2

Yes. svn-4983 built. Thanks for the quick response.

And thanks for all the work you do on this great program.

sean

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