Hi Ryan - thanks for the report. In Automake, those version.texi
variables are updated by the auxiliary script mdate-sh. In Automake
1.16, it seems mdate-sh was changed to compute the dates using UTC
(ChangeLog entry below, describing exactly what you saw, it seems),
with these lines:
# Use UTC to get reproducible result.
TZ=UTC0
export TZ
You can get the latest mdate-sh from automake or gnulib and just put it
in place independent of any other updates.
If you already have the latest mdate-sh, then I'd appreciate seeing a
recipe to reproduce, hopefully with smaller than gdbm itself
.. --thanks, karl.
2017-09-15 Reiner Herrmann <[email protected]> (tiny change)
mdate-sh: Ensure reproducible time output
This change fixes automake bug#20314.
[ https://debbugs.gnu.org/cgi/bugreport.cgi?bug=20314 ]
'mdate-sh' pretty-prints the modification time of a file. But it's
output can vary depending on the timezone of the caller. Someone in
timezone GMT-12 will get a different result (day) than someone in
timezone GMT+12. As this output is also used to create/update stamp
files, which influence the further build process, the build result can
vary.
* lib/mdate-sh: Set 'TZ' to UTC which ensures reproducible output.
* NEWS: Announce bug fix.
