Why does this matter? They were already working fine with gcc7. Why is it
of any significant benefit to the user to do this massive rebuild? I
installed gcc8, and I assume some of the rebuilds are using it, though
with USES=compiler specifying openmp, nestedfct, c11, c++0x, c++11-lang,
c++11-lib, c++14-lang, c++17-lang, or gcc-c++11-lib
leaves me mystified as several of those items will not result in the use of
gcc, though there may be some reason I miss. Still, this is the cause of
the bump for many of the ports that are being rebuilt with clang.
But why is this better than just letting gcc8 build port as they otherwise
need updating? Again, this build will typically run for hours on many
systems, using a great deal of power and slowing other uses of the systems,
if they are not dedicated build systems.