https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79341
--- Comment #8 from Dominik Vogt <vogt at linux dot vnet.ibm.com> --- The symbol was introduced to Glibc after 2.18 and before 2.19.
vogt at linux dot vnet.ibm.com Fri, 03 Feb 2017 01:49:41 -0800
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79341
--- Comment #8 from Dominik Vogt <vogt at linux dot vnet.ibm.com> --- The symbol was introduced to Glibc after 2.18 and before 2.19.