Fix cmake build on Mac and add Mac Github Action runner (milvus-io#28)

.github/workflows/cpp.yml

@@ -30,4 +30,20 @@ jobs:
       - name: Build
         run: make -C build -j
       - name: Test
-        run: make -C build test
+        run: make -C build test
+  mac-build:
+    runs-on: macos-12
+    timeout-minutes: 30
+    defaults:
+      run:
+        working-directory: ./cpp
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install dependencies
+        run: brew install apache-arrow protobuf
+      - name: Cmake
+        run: cmake -B build
+      - name: Build
+        run: make -C build -j
+      - name: Test
+        run: make -C build test

cpp/CMakeLists.txt

@@ -63,14 +63,18 @@ if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
     list(APPEND CMAKE_MODULE_PATH /usr/lib/x86_64-linux-gnu/cmake/arrow)
 endif ()
 
-find_package(Arrow REQUIRED)
-
 if (APPLE)
-    set(OPENSSL_ROOT_DIR /opt/homebrew/opt/openssl@1.1/)
+    execute_process(COMMAND brew --prefix openssl@1.1 OUTPUT_VARIABLE OPENSSL_PREFIX)
+    string(STRIP ${OPENSSL_PREFIX} OPENSSL_ROOT_DIR)
     find_package(Zstd REQUIRED)
-    list(APPEND CMAKE_MODULE_PATH /opt/homebrew/opt/apache-arrow/lib/cmake/arrow)
+    list(APPEND CMAKE_MODULE_PATH
+            /opt/homebrew/opt/apache-arrow/lib/cmake/arrow
+            /usr/local/opt/apache-arrow/lib/cmake/arrow)
+    message("FOUND OPENSSL is : ${OPENSSL_ROOT_DIR}]")
 endif (APPLE)
 
+find_package(Arrow REQUIRED)
+
 find_package(ArrowDataset REQUIRED)
 include_directories(include)
 include_directories(src)

cpp/README.md

@@ -27,7 +27,7 @@ A recent C++ compiler that supports C++20 is needed. The toolchain that has been
 
 ```sh
 # On macOS 12+
-brew install apache-arrow cmake protobuf
+brew install apache-arrow cmake protobuf openssl@1.1
 # Optionally, build document
 brew install doxygen
 ```