Can't build with upstream LMDB

[Vogtinator]

LMDB does not ship either pkg-config nor CMake files by itself, so building fails.

See also the discussion in the commit adding LMDB as dependency: 358e939#commitcomment-33867125

[Vogtinator]

Tried myself, seems to be as simple as this:

-lmdb_dep = dependency('lmdb')
+lmdb_dep = meson.get_compiler('c').find_library('lmdb')

Would need some refinement like using this only as a fallback though, but I'm not fluent in meson myself.

[ximion]

Thanks for reporting this as a proper issue :-)
This should be fixed via 653bae3 now, give it a try!