https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119550
--- Comment #6 from Andreas Schwab <sch...@linux-m68k.org> --- AC_STRUCT_TIMEZONE is trying to do a link check (for the tzname global) if struct tm has no tm_zone, thus the problem only occurs for certain non-linux targets. Since chrono implementation only supports tm_zone the configure script should probably use a tailored check for tm.tm_zone only.
