Hi Chris, I saw nothing suspicious about Bison in the logs you sent.
> Le 21 nov. 2020 à 18:33, Chris Elvidge <celvidge...@gmail.com> a écrit : > > CC lib/parse-datetime.o > In file included from lib/gettext.h:26:0, > from parse-datetime.y:71: > parse-datetime.y: In function 'parse_datetime2': > parse-datetime.y:2301:27: error: format '%lld' expects argument of type 'long > long int', but argument 2 has type 'time_t {aka long int}' [-Werror=format=] > parse-datetime.y:2301:25: note: in expansion of macro '_' This is the only error I spotted, and that corresponds to: 2296 dbg_printf (_("after time adjustment (%+"PRIdMAX" hours, " 2297 "%+"PRIdMAX" minutes, " 2298 "%+"PRIdMAX" seconds, %+d ns),\n"), 2299 pc.rel.hour, pc.rel.minutes, pc.rel.seconds, 2300 pc.rel.ns); 2301 dbg_printf (_(" new time = %"PRIdMAX" epoch-seconds\n"), t4); with time_t t4; so it appears we "only" have a portability issue where gnulib believes %PRIdMAX is ok for time_t, but it is not. The other guys (in the previous gdb_printf) are intmax_t: /* Relative times. */ typedef struct { /* Relative year, month, day, hour, minutes, seconds, and nanoseconds. */ intmax_t year; intmax_t month; intmax_t day; intmax_t hour; intmax_t minutes; intmax_t seconds; int ns; } relative_time; I have no idea what is the best course of action to fix the error (a cast? A configure check to fight the right printf format? Changing the type of t4?), but Chris, if you just want to build, then simply change 2301 into dbg_printf (_(" new time = %ld epoch-seconds\n"), t4); That should do it. Cheers!