https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69699
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2017-01-17 Ever confirmed|0 |1 --- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> --- You can look at https://gcc.gnu.org/develop.html#timeline for the release dates which are used for the values for __GLIBCXX__ in GCC 4.1.0 and later. I'm updating the docs to explain why __GLIBCXX__ is not useful.