Compiling against different OpenSSL more complicated than in our docs

[hynek]

Since version 7, pip auto-wheels stuff caches it somewhere. That usually awesome.

But it brings problems too. So I’ve spent an hour yesterday trying desperately to recompile cryptography against my homebrew’s OpenSSL and I’ve failed. In the end I pip installed my git checkout.

I kept deleting stuff from my wheel house, tried to find caches but nothing. It always pulled it out of nowhere and -v didn’t help either. I’m gonna claim that if I’m too asinine to get this done, other people are likely too.

This morning I found it out with the help of dtruss (concretely with it complaining, that I don’t own /Users/hynek/Library/Caches/pip/http b/c dtruss runs as root. So I killed all wheels there and got finally my juicy 1.0.2a.

We need to update our docs in this regard, this is madness. Does pip have some --force-recompile option I’ve missed? If not, that should be filed there too…

cc @dstufft

[dstufft]

There is no --force-recompile option, but there should be.

[Commod0re]

I had an issue with this the other day too, that started as a new feature in Tox which requires explicitly listing any environment variables you don't want to be scrubbed.

pip has a --no-cache-dir option that seems to work (this was causing an exception to be raised with the version of pip that I had installed when I tested it the other day, but I tried it again just now and it looks to be working)

[glyph]

@hynek - one trick you can use in the future is, in one terminal, bash -c 'echo $$; read; exec <program>, in another terminal, dtruss -p <pid>, then hit enter in the first terminal again.

[dracos]

Just to add key words that might help someone in future as this bit me also today – if you get something like "Symbol not found: _CRYPTO_malloc_debug_init" when trying to use cryptography, because you forgot to use the magic incantations when pip installing (or in my case, running tox) and using MacPorts, then as above you need to clear the wheel from your cache (in my case Library/Caches/pip/wheels/.../*cryptography* otherwise you keep on getting the broken wheel no matter what you think you've deleted elsewhere...