[cctbxbb] Booststrap fails: zlib.h missing on Mojave with Xcode 10.3

[Luc Bourhis]

Hi,

I am trying to setup a Python 3 cctbx. I did

python bootstrap.py --git-ssh --python3 --builder cctbxlite

But it fails at the installation of OpenSSL. Clang version is "Apple LLVM version 10.0.1 (clang-1001.0.46.4)”. I attached the OpenSSL install log but I don’t see any error in it. And the advice to run xcode-select is bogus: I have it already setup. 
Best wishes,

Luc

Installing OpenSSL...
  log file is /Users/luc/Developer/cctbx/base_tmp/OpenSSL_install_log
  getting package openssl-1.0.2r.tar.gz...
    downloading from https://gitcdn.link/repo/dials/dependencies/master/openssl-1.0.2r.tar.gz : 5223 kB
  installing openssl-1.0.2r.tar.gz...
  package openssl took 219.5s to install

--------------------------------------------------------------------------------

zlib.h missing -- try running 'xcode-select --install' first
Process failed with return code 1


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