[Bug libstdc++/108288] Deadlock when using -fno-elide-constructor + -D_GLIBCXX_DEBUG=1 + -std=c++11

[simon.marchi at polymtl dot ca]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108288

--- Comment #4 from Simon Marchi <simon.marchi at polymtl dot ca> ---
Thanks for looking into this so quickly.  I'll try to test the patch against my
use case, but I might need some guidance.  I know how to build gcc and install
it in some non-default prefix.  But then, do I need to do something special
when building my program, to ensure that this libstdc++.so will be used,
instead of the system one?  Just set LD_LIBRARY_PATH appropriately, like for
any other lib?