fix install for mac osx > 10.9, based on pandas fix for the same

.circleci/config.yml

@@ -159,6 +159,7 @@ jobs:
             pip install git+https://github.com/HERA-Team/linsolve.git
             pip install git+https://github.com/HERA-Team/hera_qm.git
             pip install git+https://github.com/HERA-Team/uvtools.git
+            pip install git+https://github.com/HERA-Team/hera_sim.git
       - run:
           name: run hera_cal tests
           command: |

CHANGELOG.md

@@ -17,6 +17,8 @@ All notable changes to this project will be documented in this file.
 
 ### Fixed
 - Possible bug where `check_variables` dictionary can change size during `read_miriad` call
+- Building pyuvdata on macOS now targets minimum macOS 10.9 if run on macOS 10.9 or above
+
 
 ## [1.3.7] - 2019-04-02
 

ci/hera_cal.yml

@@ -5,6 +5,7 @@ channels:
 dependencies:
   - aipy
   - astropy
+  - cached-property
   - h5py
   - healpy
   - matplotlib

setup.py

@@ -8,6 +8,10 @@
 import glob
 import os
 import io
+import sys
+import platform
+from distutils.sysconfig import get_config_var
+from distutils.version import LooseVersion
 import numpy as np
 import json
 
@@ -24,6 +28,23 @@
     readme = readme_file.read()
 
 
+def is_platform_mac():
+    return sys.platform == 'darwin'
+
+
+# For mac, ensure extensions are built for macos 10.9 when compiling on a
+# 10.9 system or above, overriding distuitls behaviour which is to target
+# the version that python was built for. This may be overridden by setting
+# MACOSX_DEPLOYMENT_TARGET before calling setup.py
+# implementation based on pandas, see https://github.com/pandas-dev/pandas/issues/23424
+if is_platform_mac():
+    if 'MACOSX_DEPLOYMENT_TARGET' not in os.environ:
+        current_system = LooseVersion(platform.mac_ver()[0])
+        python_target = LooseVersion(
+            get_config_var('MACOSX_DEPLOYMENT_TARGET'))
+        if python_target < '10.9' and current_system >= '10.9':
+            os.environ['MACOSX_DEPLOYMENT_TARGET'] = '10.9'
+
 global_c_macros = [
     ('NPY_NO_DEPRECATED_API', 'NPY_1_7_API_VERSION'),
 ]