[Wheel-builders] Problem with "too-recent versioned symbols"

[Lele Gaifax]

Nick Coghlan <ncoghlan at gmail.com> writes:

> One thing you might want to try is to send yourself a PR that reverts
> everything back to the way it was for your 0.1.0 release, and see if
> *that* builds. If it doesn't, you can plausibly guess that something
> changed unexpectedly in the Travis build environment. If it does
> build, then you can start selectively removing things from the
> reversion PR until the build breaks again.

Thank you Nick,

this morning I ran a dozen of different attempts, and even if I was able to
isolate the commit that makes the difference, I'm still lost in determining
exactly *what* it does "wrong".

Just for the history, and maybe to relax a bit, here is a brain dump of my
discovering:

* the commit that triggers the problem[1] is apparently innocuous, the
  prominent change is that instead of #including a "version.h" with some
  #defines it keeps the module's version in a toplevel "version.txt" and the
  actual version is passed to the compiler with a -D option

* the immediate parent commit[2] does not exhibit the issue, 

* I tried to wander around the problematic commit trying out several different
  approaches and trialing various assumptions, without luck: my last
  attempt[3] (for today...) seems to prove that it's not the -D option the
  cause

What a strange and boring problem :-\

Thanks for any further suggestion,
ciao, lele.
  
[1] https://github.com/python-rapidjson/python-rapidjson/commit/957be619ae24e5758bfd93711713d0296724acb9
[2] https://github.com/python-rapidjson/python-rapidjson/commit/3f350c7e3362d23713c06fa2884d92e10e0cc018
[3] https://github.com/python-rapidjson/python-rapidjson/commit/f750e43c23e3e990a4e596029c0029fab2793d55
-- 
nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
lele at metapensiero.it  |                 -- Fortunato Depero, 1929.