Bug#824668: gmt: please make the build reproducible (timestamps)

[Bas Couwenberg]

Control: tags -1 pending

Hi Alexis,

Thanks for your patch, unfortunately it's some duplicate work because I 
recently added a similar patch which has been merged upstream:

  
http://anonscm.debian.org/cgit/pkg-grass/gmt.git/tree/debian/patches/source_date_epoch.patch

My patch doesn't bother patching today.c (although the initial version 
did that too), it handles SOURCE_DATE_EPOCH in CMake.

The transition to GDAl 2.1.0 is almost complete (#823335). I'll upload a 
new GMT revision that includes the upstreamed patch after GDAL 2.1.0 is 
in testing.

Kind Regards,

Bas