undefined symbol: mdb_txn_id

[salortiz]

After the v0.11 release that includes @rouzier's work some CPAN testers are failing, see:
http://matrix.cpantesters.org/?dist=LMDB_File+0.11

I'm suspecting we needs to test for the availability of the symbol in lmdb library so that code can be conditionally compiled.

@rouzier, can you take a look, please?

[hoytech]

Is there any way to tell which liblmdb.so is being used by these tests? It would be nice to throw some diag() lines in the test before the use_ok('LMDB_File') to display this info (if possible).

I recently upgraded Alien::LMDB to the latest LMDB release, 0.9.19. This is another potential advantage of the Alien method: you can encode a minimum version LMDB dependency at the perl level (independent of what your OS packages.)

But I do agree LMDB_File should try to work with both old and new versions, and throw a run-time error if this feature wasn't compiled in.

[hoytech]

Although I just remembered, Alien::LMDB actually does fallback to the system verson if present... Maybe I should remove that feature, or make it opt-in...

I added an issue here:

hoytech/Alien-LMDB#3

[salortiz]

I've pushed a trivial fix, I'll wait for some cpantesters.org's reports before closing this.
Fingers crossed ;-)