gcc-12 (12.3.0-13) unstable; urgency=medium
* Update to git
20231215 from the gcc-12 branch.
- Fix PR target/112891 (x86), PR libstdc++/112314.
* Build again using GCC 11 to fix the bootstrap on riscv64.
* For Ubuntu 24.04 LTS and later, switch _FORTIFY_SOURCE to 3 by default
instead of 2 when optimization is enabled.
[dgit import unpatched gcc-12 12.3.0-13]