Set minimum macOS version to 10.14

contrib/macdeploy/Info.plist.in

@@ -3,7 +3,7 @@
 <plist version="0.9">
 <dict>
   <key>LSMinimumSystemVersion</key>
-  <string>10.15.0</string>
+  <string>10.14.0</string>
 
   <key>LSArchitecturePriority</key>
   <array>

contrib/macdeploy/README.md

@@ -24,7 +24,7 @@ and search for [`Xcode 12.2`](https://developer.apple.com/download/all/?q=Xcode%
 
 An Apple ID and cookies enabled for the hostname are needed to download this.
 
-The `sha256sum` of the downloaded XIP archive should be `28d352f8c14a43d9b8a082ac6338dc173cb153f964c6e8fb6ba389e5be528bd0`.
+The `sha256sum` of the downloaded XIP archive should be `332477876917786b26dd7c3fc1665d2c5cdca81c72755e6a9754f308de77d33b`.
 
 After Xcode version 7.x, Apple started shipping the `Xcode.app` in a `.xip`
 archive. This makes the SDK less-trivial to extract on non-macOS machines. One

contrib/macdeploy/gen-sdk

@@ -60,6 +60,8 @@ def run():
         sdk_build_id = pl['ProductBuildVersion']
     print("Found MacOSX SDK (version: {sdk_version}, build id: {sdk_build_id})".format(sdk_version=sdk_version, sdk_build_id=sdk_build_id))
 
+    clang_rt = xcode_app.joinpath("Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/12.0.0/lib/darwin")
+
     out_name = "Xcode-{xcode_version}-{xcode_build_id}-extracted-SDK-with-libcxx-headers".format(xcode_version=xcode_version, xcode_build_id=xcode_build_id)
 
     xcode_libcxx_dir = xcode_app.joinpath("Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1")
@@ -109,6 +111,8 @@ def run():
                 tarfp_add_with_base_change(tarfp, sdk_dir, out_name)
                 print("Adding libc++ headers...")
                 tarfp_add_with_base_change(tarfp, xcode_libcxx_dir, "{}/usr/include/c++/v1".format(out_name))
+                print("Adding clang_rt libraries")
+                tarfp_add_with_base_change(tarfp, clang_rt, "{}/lib/darwin".format(out_name))
     print("Done! Find the resulting gzipped tarball at:")
     print(out_sdktgz_path.resolve())