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I got this error:

/opt/quartus/linux/ GLIBCXX_3.4.15 not found required by compiz 

I am also unable to work with apt-get.

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Solution is to

  • Compile gcc-4.6.2 with --prefix=/usr/local/gcc462/
  • Copy to /usr/lib64/
  • Create a new symlink to


  • Download .deb from this location and grab from the package. To unpack the package use command: ar -x <package> && tar xvf data.tar.gz

Hope this helps

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Thnks for reply, my gcc version is 4.6.2.but when i type this command in my terminal is strings /opt/quartus/linux/ grep | GLIBC, the output is GLIBCXX_3.4 to GLIBCXX is 3.4.9 only but gcc is 4.6.2.How to compile gcc-4.6.2 wit --prefix=/usr/local/gcc462.kindly tel me sir. – alex Oct 15 '12 at 9:00

For those of you with Calibre: please note that changing the default installed Calibre to the one in use by your system can be accomplished simply by:

root@localhost:~# cd /[path to calibre]/lib/

This next command is optional as a method of keeping the installed for trouble issues, if unnecessary to keep the file then delete it.

root@localhost:/[path to calibre]/lib/# mv libstdc++.KEEP_so.6

Finally link the system's into the Calibre libray directory.

root@localhost:/[path to calibre]/lib/# ln -s /usr/lib/gcc/x86_64-linux-gnu/4.6 \

Note: this from my system using Ubuntu 12.0.4 LTS x86_64 with current updates applied via apt-get.

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