https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78905
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|8.0 |7.0
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
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.
