I believe this also fixed in: #443fe78cb097ae2196517fc726595b57cb9418c4 https://sourceforge.net/p/viking/code/ci/443fe78cb097ae2196517fc726595b57cb9418c4/ Viking uses configure.ac, so ATM explicitly sets the CXXFLAGS before attempting trying the use of mapnik - as opposed to some kind of pkg-config method PKG_CHECK_MODULES - which may have issue/cause side effects when used in an optional section.
This is fixed by commit: #443fe78cb097ae2196517fc726595b57cb9418c4 https://sourceforge.net/p/viking/code/ci/443fe78cb097ae2196517fc726595b57cb9418c4/
This is fixed by commit: #443fe78cb097ae2196517fc726595b57cb9418c4
The normal (Viking) order for tile reference components is Z, X, Y as per: https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames But from that Karverket leaflet config guide - their config is now Z, Y, X. Thus for Viking config, there are two ways to achieve this. One way (as noted at the top of this page) is via the C printf parameter ordering, the other perhaps easier way is to add the line following line into your new version: <property name="switch-xy">TRUE</property> Which seems to work for...
@jidanni - I've added you into Viking 'Members' group - thus you'll now should have access to modify this Wiki
Maps
Maps
Mapnik API v4.0.0 support