I updated my GCC compiler from the GIT repo to version 11. Now my test code (GoogleTest/GoogleMock) is complaining about GLIBCXX_3.4.29 not being found. This is not a duplicate please reopen The answers posted in: Understanding the gcc version and the GLIBC, GLIBCXX versions in more detail (2 answers) doesn't answer the question.
Linker error is:
/usr/lib/x86_64-linux-gnu/libstdc++.so.6: version GLIBCXX_3.4.29 not found
The output of strings /usr/lib/x86_64-linux-gnu/libstdc++.so.6 | grep GLIBCXX
GLIBCXX_3.4
GLIBCXX_3.4.1
GLIBCXX_3.4.2
GLIBCXX_3.4.3
GLIBCXX_3.4.4
GLIBCXX_3.4.5
GLIBCXX_3.4.6
GLIBCXX_3.4.7
GLIBCXX_3.4.8
GLIBCXX_3.4.9
GLIBCXX_3.4.10
GLIBCXX_3.4.11
GLIBCXX_3.4.12
GLIBCXX_3.4.13
GLIBCXX_3.4.14
GLIBCXX_3.4.15
GLIBCXX_3.4.16
GLIBCXX_3.4.17
GLIBCXX_3.4.18
GLIBCXX_3.4.19
GLIBCXX_3.4.20
GLIBCXX_3.4.21
GLIBCXX_3.4.22
GLIBCXX_3.4.23
GLIBCXX_3.4.24
GLIBCXX_3.4.25
GLIBCXX_3.4.26
GLIBCXX_3.4.27
GLIBCXX_3.4.28
GLIBCXX_DEBUG_MESSAGE_LENGTH
Where can I find 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.