Even the Dreamcast port has a version of GCC able to pass the initial standards tests, so most legacy ports seem to be in a state that they'll be able to leverage at least a subset of C++11 functionality.
(Sadly - as with many large community-driven projects that require a specialist set of skills like reverse engineering - ScummVM does have a slight history of alienating contributors only to adopt the point in contention as some point in the future.
Source: I was once a co-lead developer for ScummVM, and tried unsuccessfully to fix this :P)
Believe it or not, there's finally some progress here!
https://wiki.scummvm.org/index.php?title=Compiling_ScummVM/C...
Even the Dreamcast port has a version of GCC able to pass the initial standards tests, so most legacy ports seem to be in a state that they'll be able to leverage at least a subset of C++11 functionality.
(Sadly - as with many large community-driven projects that require a specialist set of skills like reverse engineering - ScummVM does have a slight history of alienating contributors only to adopt the point in contention as some point in the future.
Source: I was once a co-lead developer for ScummVM, and tried unsuccessfully to fix this :P)