ZNC 1.6 run giving GLIBCXX_3.4.11 not found error #504

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2026-10-05T04:25:43+02:00

adam commented

2026-10-05 04:25:43 +02:00

znc -r
/usr/lib/libstdc++.so.6: version GLIBCXX_3.4.11 required by /usr/local/bin/znc not found

That's what I'm getting. I created a fresh jail on FreeNAS, performed the pkg updates, etc. and followed the instructions on the ZNC wiki to install but receive the above error when I try to do anything involving the znc binary. Any ideas?

znc -r /usr/lib/libstdc++.so.6: version GLIBCXX_3.4.11 required by /usr/local/bin/znc not found That's what I'm getting. I created a fresh jail on FreeNAS, performed the pkg updates, etc. and followed the instructions on the ZNC wiki to install but receive the above error when I try to do anything involving the znc binary. Any ideas?

adam closed this issue

2026-10-05 04:25:43 +02:00

adam commented

2026-10-05 04:25:44 +02:00

Did you build from source or did you use a precompiled package for it? (I.E. how did you install ZNC)

Did you build from source or did you use a precompiled package for it? (I.E. how did you install ZNC)

adam commented

2026-10-05 04:25:45 +02:00

I've tried so much at this point, it's hard to remember. But I believe I
used the pkg install irc/znc.

On Mon, Mar 30, 2015 at 1:20 PM, Thomas Ward notifications@github.com
wrote:

Did you build from source or did you use a precompiled package for it?
(I.E. how did you install it)

—
Reply to this email directly or view it on GitHub
https://github.com/znc/znc/issues/931#issuecomment-87758086.

I've tried so much at this point, it's hard to remember. But I believe I used the pkg install irc/znc. On Mon, Mar 30, 2015 at 1:20 PM, Thomas Ward notifications@github.com wrote: > Did you build from source or did you use a precompiled package for it? > (I.E. how did you install it) > > — > Reply to this email directly or view it on GitHub > https://github.com/znc/znc/issues/931#issuecomment-87758086.

adam commented

2026-10-05 04:25:46 +02:00

If it's a prepackaged-for-that-OS package, that's not really a ZNC upstream problem - likely indicates packaging problems in that specific distribution's built binaries...

If it's a prepackaged-for-that-OS package, that's not really a ZNC upstream problem - likely indicates packaging problems in that specific distribution's built binaries...

adam commented

2026-10-05 04:25:46 +02:00

you can work around the issue by setting library paths or patching the executeable
patchelf --set-rpath /usr/local/lib/gcc48 /usr/local/bin/znc

in general it's an issue in the freebsd package not znc

you can work around the issue by setting library paths or patching the executeable patchelf --set-rpath /usr/local/lib/gcc48 /usr/local/bin/znc in general it's an issue in the freebsd package not znc

adam commented

2026-10-05 04:25:47 +02:00

Another user shown similar error; they compiled ZNC manually on FreeBSD.

By default g++ is 4.6 there, so they used CXX=/usr/local/bin/g++48, but it complains about /usr/local/lib/gcc46/libstdc++.so.6: version GLIBCXX_3.4.18 required by /usr/local/bin/znc not found
Workaround for this: export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib/gcc48 (patchelf might work too)

Alternatively, just use CXX=clang++ instead.

So, FreeNAS package needs to be fixed to compile ZNC correctly.

Another user shown similar error; they compiled ZNC manually on FreeBSD. By default g++ is 4.6 there, so they used `CXX=/usr/local/bin/g++48`, but it complains about `/usr/local/lib/gcc46/libstdc++.so.6: version GLIBCXX_3.4.18 required by /usr/local/bin/znc not found` Workaround for this: `export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib/gcc48` (patchelf might work too) Alternatively, just use `CXX=clang++` instead. So, FreeNAS package needs to be fixed to compile ZNC correctly.

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Reference: adam/znc#504