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Re: Help with missing __sync_fetch_and_add_8

Manuel A. Fernandez Montecelo wrote:

I write here in the case that somebody can help me to fix this.

ogre-1.9 (...-2) fails to build with this error (full log in [1]):

CMakeFiles/OgreMain.dir/src/OgreResourceManager.cpp.o: In function
`Ogre::AtomicScalar<unsigned long long>::operator++(int)':
undefined reference to `__sync_fetch_and_add_8'

I attemped to fix this with patch [2] changing __sync calls to
__atomic, and depending on gcc >= 4.8 and linking to -latomic, as
suggested in [3].

Now fails with (full log in [4]):
undefined reference to `__atomic_fetch_add_8'

Can anybody please advise on what to do?

The package is a pre-release, not very important and low popcon, but
if this is not fixed it will persist in the future, and it's not the
only package affected by this issue so I guess that somebody can give
some hint.

I don't know whether this is remotely helpful, but I had problems building an old kernel on a different architecture which was fixed by http://www.brunni.de/linux_kernel_2.6.27.62_with_gcc_4.6.3.html

Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk

[Opinions above are the author's, not those of his employers or colleagues]

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