The highlighted sentence gives the minimum version of gcc which folly broadly supports. One motivation for this is so that a user may know whether folly suppor

The highlighted sentence gives the minimum version of gcc which folly broadly supports. One motivation for this is so that a user may know whether folly supports the version of the gcc c++ compiler which is preinstalled on their system, since many systems ship with a preinstalled gcc. Likewise for systems which ship with a blessed package repo. But folly also supports recent versions of clang and msvc, as other commenters here note.