My personal server uses CentOS 7.9, and there are often strange errors when deploying some AI applications.
For example, recently, an error was reported when deploying an application:

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/lib64/libstdc++.so.6: version GLIBCXX_3.4.xx not found

Online search for solutions, there are different opinions, either reinstall gcc, or recompile and install libstdc++,export LD_LIBRARY_PATH and so on.
Several attempts have failed, and there is no way to upgrade the os version. Finally, a suitable solution is found, and it’s worked for me.

1. Find and display all packages that provide libstdc++.so.6 as a library file through yum

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sudo yum provides libstdc++.so.6

2. Download new version libstdc.so.

NOTICE: Since I need version 3.4.22+, so I can just update it to 3.4.26. Other versions are the same.

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cd /usr/local/lib64
sudo wget http://www.vuln.cn/wp-content/uploads/2019/08/libstdc.so_.6.0.26.zip
unzip libstdc.so_.6.0.26.zip

3. Copy libstdc++.so.6.0.26 to /usr/lib64

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cp libstdc++.so.6.0.26 /usr/lib64
cd /usr/lib64

4. Check the soft link version of libstdc++.so.6,

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ls -l | grep libstdc++

It may shows like this:

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libstdc++.so.6 ->libstdc++.so.6.0.19

5. Remove /usr/lib64 original link libstdc++.so.6, you can backup it before remove.

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sudo rm libstdc++.so.6

then, relink it.

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sudo ln -s libstdc++.so.6.0.26 libstdc++.so.6

6. OK, check the newest link

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strings /usr/lib64/libstdc++.so.6 | grep GLIBCXX

It may shows like this:

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GLIBCXX_3.4
...
GLIBCXX_3.4.25
GLIBCXX_3.4.26
GLIBCXX_DEBUG_MESSAGE_LENGTH

Well Done!