Configure macOS targets depending on OS.

I've added separate builds for our 10.8 and 10.10 machines while we
work out our 10.10 build issues. Unfortunately the 10.10 machines
can't build for 10.8 and the 10.8 machines can't build for 10.9, so we
need to handle them differently.

Test: None
Bug: None
Change-Id: I6df3d8a663ccb214e3b829cd158e1d10ddb6a037

1 files changed, 19 insertions, 1 deletions

diff --git a/do_build.py b/do_build.py
index d4780af3..b6dbb744 100755
--- a/do_build.py
+++ b/do_build.py
@@ -71,6 +71,24 @@ def check_call(cmd, *args, **kwargs):
     subprocess.check_call(cmd, *args, **kwargs)
 
 
+def check_output(cmd, *args, **kwargs):
+    """subprocess.check_call with logging."""
+    logger().info('check_output %s', subprocess.list2cmdline(cmd))
+    return subprocess.check_output(cmd, *args, **kwargs)
+
+
+def get_osx_deployment_target():
+    """Determines which macOS deployment target should be used."""
+    major, minor, _ = check_output(['sw_vers', '-productVersion']).split('.')
+    assert major == '10'
+    if minor == '8':
+        return '10.8'
+    elif minor == '10':
+        return '10.9'
+    else:
+        raise RuntimeError(f'Unconfigured macOS version: {major}.{minor}')
+
+
 def configure(arch, host: Host, install_dir, src_dir):
     """Configures binutils."""
     configure_host = {
@@ -106,7 +124,7 @@ def configure(arch, host: Host, install_dir, src_dir):
         toolchain = ndk.paths.android_path(
             'prebuilts/gcc/darwin-x86/host/i686-apple-darwin-4.2.1')
         toolchain_prefix = 'i686-apple-darwin10'
-        env['MACOSX_DEPLOYMENT_TARGET'] = '10.8'
+        env['MACOSX_DEPLOYMENT_TARGET'] = get_osx_deployment_target()
     elif host == Host.Linux:
         toolchain = ndk.paths.android_path(
             'prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.15-4.8')