# HG changeset patch
# User Georges Racinet <georges.racinet@octobus.net>
# Date 2019-06-14 10:18:06
# Node ID 8ee0fdf3b08721c84849e55be45422b5900b1da4
# Parent  f4a65077e94978da1f60f714af8af0ed679ea83e

rust-cpython: fix build for MacOSX

MacOSX needs special link flags. Quoting the README of rust-cpython:

  create a `.cargo/config` with the following content:

  ```
  [target.x86_64-apple-darwin]
  rustflags = [
    "-C", "link-arg=-undefined",
    "-C", "link-arg=dynamic_lookup",
  ]
  ```

This is tested with Python 2.7 (Anaconda install) and Python 3
(Homebrew install)

diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -1199,6 +1199,9 @@ class RustExtension(Extension):
         if sys.version_info[0] == 3 and self.py3_features is not None:
             cargocmd.extend(('--features', self.py3_features,
                              '--no-default-features'))
+        if sys.platform == 'darwin':
+            env['RUSTFLAGS'] = ("-C link-arg=-undefined "
+                                "-C link-arg=dynamic_lookup")
         try:
             subprocess.check_call(cargocmd, env=env, cwd=self.rustsrcdir)
         except OSError as exc: