Set MACOSX_DEPLOYMENT_TARGET env variable

to prevent errors like:

- `targeted OS version does not support use of thread local variables`
- `$MACOSX_DEPLOYMENT_TARGET mismatch: now "10.5" but "10.6" during configure`

Refs: #4

1 files changed, 6 insertions, 0 deletions

diff --git a/setup.py b/setup.py
index 3402dcc..1d165a6 100644
--- a/setup.py
+++ b/setup.py
@@ -1,6 +1,8 @@
 #!/usr/bin/env python
 
 import os
+import platform
+import sysconfig
 import subprocess
 import tarfile
 import shutil
@@ -54,6 +56,10 @@ class jq_build_ext(build_ext):
             except subprocess.CalledProcessError:
                 print("No Homebrew yacc found")
 
+        macosx_deployment_target = sysconfig.get_config_var("MACOSX_DEPLOYMENT_TARGET")
+        if macosx_deployment_target:
+            os.environ['MACOSX_DEPLOYMENT_TARGET'] = macosx_deployment_target
+
         command(["autoreconf", "-i"])
         command(["./configure"] + configure_args)
         command(["make"])