Merge pull request #15138 from jtattermusch/fix_csharp_macos

Fix C# macos tests

examples/csharp/helloworld-from-cli/global.json

@@ -1,5 +0,0 @@
-{
-  "sdk": {
-    "version": "1.0.0"
-  }
-}

src/csharp/Grpc.Core/NativeDeps.Mac.csproj.include

@@ -1,13 +1,5 @@
 <Project>
   <ItemGroup>
-    <!-- We are relying on run_tests.py to build grpc_csharp_ext with the right bitness
-    and we copy it as both x86 (needed by net45) and x64 (needed by netcoreapp1.0) as we don't
-    know which one will be needed to run the tests. -->
-    <Content Include="..\..\..\libs\$(NativeDependenciesConfigurationUnix)\libgrpc_csharp_ext.dylib">
-      <Link>libgrpc_csharp_ext.x86.dylib</Link>
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-      <Pack>false</Pack>
-    </Content>
     <Content Include="..\..\..\libs\$(NativeDependenciesConfigurationUnix)\libgrpc_csharp_ext.dylib">
       <Link>libgrpc_csharp_ext.x64.dylib</Link>
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>

src/csharp/global.json

@@ -1,5 +0,0 @@
-{
-  "sdk": {
-    "version": "2.1.4"
-  }
-}

tools/run_tests/run_tests.py

@@ -921,9 +921,6 @@ class CSharpLanguage(object):
             if self.platform == 'mac':
                 # TODO(jtattermusch): EMBED_ZLIB=true currently breaks the mac build
                 self._make_options = ['EMBED_OPENSSL=true']
-                if self.args.compiler != 'coreclr':
-                    # On Mac, official distribution of mono is 32bit.
-                    self._make_options += ['ARCH_FLAGS=-m32', 'LDFLAGS=-m32']
             else:
                 self._make_options = ['EMBED_OPENSSL=true', 'EMBED_ZLIB=true']
 
@@ -944,6 +941,9 @@ class CSharpLanguage(object):
             assembly_subdir += '/net45'
             if self.platform == 'windows':
                 runtime_cmd = []
+            elif self.platform == 'mac':
+                # mono before version 5.2 on MacOS defaults to 32bit runtime
+                runtime_cmd = ['mono', '--arch=64']
             else:
                 runtime_cmd = ['mono']