https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78905
--- Comment #9 from Matt Clarkson <mattyclarkson at gmail dot com> --- (In reply to Jonathan Wakely from comment #7) > GCC 7 now defines _GLIBCXX_RELEASE (with the same value as __GNUC__ has, > i.e. the GCC major version, as an integer constant, but defined by the > library headers not the compiler). > > If that macro is present you have a version of libstdc++ that provides a > working <regex>. To be really sure you could check it's defined to a value > >= 5, in order to handle (hypothetical) unofficial 4.7 or 4.8 builds that > have the patch backported. Sweet! Will update the snippet on Stack Overflow. Thank you for this, you the man ;)
