bug#53940: Wrong gcc path ?

[Cayetano Santos]

Hello Guix,

 I'm building a container with 'guix shell --container', and 
 including gcc-toolchain.

 Under /gnu/store I get gcc 11.2 as well as gcc 10.3, both with 
 -lib directories. Problem is I get an error about GLIBCXX_3.4.29 
 missing. My software compiles (and finds) the wrong gcc 10.3 
 lib, and not the correct 11.2. How can I set the correct gcc 
 libs ? I have located the folder, but the random hash makes it 
 unusable. I mean, setting LD_LIBRARY_PATH solves the problem, 
 but, how to guess the right one ?

 To reproduce the problem, I have created an example repository 
 here: https://gitlab.in2p3.fr/csantos/examples/guix-issue

 Is that related to guix ?

Thanks,

Cayetano Santos