[Bug libstdc++/105671] [11/12/13 Regression] Unexplained "undefined reference" error

[christian.morales.vega at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105671

--- Comment #4 from Cristian Morales Vega <christian.morales.vega at gmail dot 
com> ---
I can confirm adding "__attribute__((always_inline))" in _M_high_mark() solves
the issue.