Add MacOS pipelines build support. (#902)

* Attempt to add MacOS pipelines support; increase parallelism to 4.

* Fix "expression unused" warnings on MacOS.

Author: BillyONeal

Release/tests/functional/http/client/compression_tests.cpp

@@ -761,15 +761,15 @@ SUITE(compression_tests)
         // No acquire(), to force non-acquire compression client codepaths
         virtual bool acquire(_Out_ _CharType*& ptr, _Out_ size_t& count)
         {
-            ptr;
-            count;
+            (void)ptr;
+            (void)count;
             return false;
         }
 
         virtual void release(_Out_writes_(count) _CharType* ptr, _In_ size_t count)
         {
-            ptr;
-            count;
+            (void)ptr;
+            (void)count;
         }
 
         static concurrency::streams::basic_istream<_CharType> open_istream(const _CharType* data, size_t size)

azure-pipelines.yml

@@ -18,7 +18,7 @@ jobs:
         cmakeArgs: '-G Ninja -DCMAKE_BUILD_TYPE=Debug ..'
     - script: |
         cd build.debug
-        ninja -j 2
+        ninja -j 4
       displayName: 'Run ninja'
   - job: Ubuntu_1604_Apt_Release
     pool:
@@ -37,5 +37,37 @@ jobs:
         cmakeArgs: '-G Ninja -DCMAKE_BUILD_TYPE=Release ..'
     - script: |
         cd build.release
-        ninja -j 2
+        ninja -j 4
+      displayName: 'Run ninja'
+  - job: MacOS_Debug
+    pool:
+      vmImage: 'macOS-10.13'
+    steps:
+    - script: brew install boost openssl ninja
+      displayName: Berw install dependencies
+    - script: mkdir build.debug
+      displayName: Make build.debug
+    - task: CMake@1
+      inputs:
+        workingDirectory: 'build.debug'
+        cmakeArgs: '-G Ninja -DCMAKE_BUILD_TYPE=Debug ..'
+    - script: |
+        cd build.debug
+        ninja -j 4
+      displayName: 'Run ninja'
+  - job: MacOS_Release
+    pool:
+      vmImage: 'macOS-10.13'
+    steps:
+    - script: brew install boost openssl ninja
+      displayName: Berw install dependencies
+    - script: mkdir build.release
+      displayName: Make build.release
+    - task: CMake@1
+      inputs:
+        workingDirectory: 'build.release'
+        cmakeArgs: '-G Ninja -DCMAKE_BUILD_TYPE=Release ..'
+    - script: |
+        cd build.release
+        ninja -j 4
       displayName: 'Run ninja'