How to Find Libstdc++.So.6: That Contain Glibcxx_3.4.19 for Rhel 6

libstdc++.so.6: version `GLIBCXX_3.4.20' not found

Considering that /usr/lib/x86_64-linux-gnu/libproxy.so.1 is supplied by Ubuntu, let's assume that it is compatible with the system libstdc++ library. This means that the application is not actually using that system library, but some other version. I'd suggest to check if the application sets LD_LIBRARY_PATH and if there is another copy of libstdc++.so.6 on that path. In this case, try moving it away or deleting it—the application should then switch to the system library, which is newer and should be backwards-compatible.

/usr/lib/libstdc++.so.6: version `GLIBCXX_3.4.15' not found

I'm compiling gcc 4.6 from source, and apparently

sudo make install 

didn't catch this one. I dug around and found

gcc/trunk/x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so.6.0.15

I copied it in to /usr/lib and redirected libstdc++.so.6 to point to the new one, and now everything works.

Starting VS Code hangs with GLIBCXX_3.4.20 not found, Can I point to a libstdc++.so.6 in a non-standard location?

Per scroveez's suggestion, the /usr/lib64/libstdc++.so.6 was indeed a symlink to the older version. To fix it I copied the 'new' version 25 library into /usr/lib64/ and changed the symlink to point to the newer version.

$ ll /usr/lib/libstdc++.so.*
lrwxrwxrwx 1 root root      18 Apr 30  2019 /usr/lib/libstdc++.so.5 -> libstdc++.so.5.0.7
-rwxr-xr-x 1 root root  739520 Nov 13  2014 /usr/lib/libstdc++.so.5.0.7
lrwxrwxrwx 1 root root      19 Jul  6 08:56 /usr/lib/libstdc++.so.6 -> libstdc++.so.6.0.25
-rwxr-xr-x 1 root root  934644 Mar 25  2020 /usr/lib/libstdc++.so.6.0.19
-rwxr-xr-x 1 root root 1570176 Jul  6 08:55 /usr/lib/libstdc++.so.6.0.25
$

Where can I find GLIBCXX_3.4.29?

After building GCC and installing the binaries, the softlink /usr/lib/x86_64-linux-gnu/libstdc++.so.6 wasn't updated to the latest version. Mine was still pointing to a previous version as mentioned in the comments above. Under GCC build directory I found the GLIBCXX_3.4.29 build directory and copied the library to /usr/lib/x86_64-linux-gnu and updated the softlink.

---

Related Topics