The single underscore version is actually slightly more supported among
the compilers I've seen so far. Also added the exact list now.
Part of P0183, funded by Yanga and [Anonymous].
Might look uglier, but has the advantage of not generating an empty
segment with the default name… *and* the default padding, which will
really come in handy with the following breakthrough.
Part of P0137, funded by [Anonymous].
Finishing this push with another highly questionable one… Let's hope
that the port developers will certainly appreciate that they just have
to remove the weirdness here, and not mess with defining entirely new
functions in C land.
Completes P0127, funded by [Anonymous].
nmlgc