Adding arm64 support for OS X. (kwhat#94)

Adding arm64 support for OS X and removing cmake 10.5 min version requirement.

Author: kwhat

.github/workflows/package.yml

@@ -5,6 +5,42 @@ on:
       - '**'
 
 jobs:
+  apple-arm64:
+    runs-on: macos-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v1
+        with:
+          submodules: true
+
+      - name: Compile
+        env:
+          CC: clang
+          CFLAGS: '-O2 -g -target arm64-apple-macos10.5 -flto -fomit-frame-pointer -fno-stack-protector -pipe'
+          LDFLAGS: '-Wl,-dead_strip_dylibs'
+        shell: bash
+        run: |
+          cmake -B ${{github.workspace}}/build \
+            -G "Unix Makefiles" \
+            -D CMAKE_INSTALL_PREFIX=${{github.workspace}}/dist/darwin/x86_64 \
+            -D CMAKE_VERBOSE_MAKEFILE=true \
+            -D BUILD_SHARED_LIBS=ON \
+            -D BUILD_DEMO=ON
+
+          cmake --build ${{github.workspace}}/build \
+            --parallel 2 \
+            --config RelWithDebInfo \
+            --clean-first
+
+          cmake --install ${{github.workspace}}/build --config RelWithDebInfo
+
+      - name: Upload
+        uses: actions/upload-artifact@v2
+        with:
+          name: nightly-build
+          path: ${{github.workspace}}/dist/**/*
+
   apple-x86_64:
     runs-on: macos-latest
 
@@ -14,10 +50,10 @@ jobs:
         with:
           submodules: true
 
-      - name: Compile x86_64
+      - name: Compile
         env:
           CC: clang
-          CFLAGS: '-O2 -g -march=x86-64 -mtune=generic -flto -fomit-frame-pointer -fno-stack-protector -pipe'
+          CFLAGS: '-O2 -g -target x86_64-apple-macos10.5 -flto -fomit-frame-pointer -fno-stack-protector -pipe'
           LDFLAGS: '-Wl,-dead_strip_dylibs'
         shell: bash
         run: |

CMakeLists.txt

@@ -219,7 +219,6 @@ if(UNIX AND NOT APPLE)
     endif()
 elseif(APPLE)
     set(CMAKE_MACOSX_RPATH 1)
-    set(CMAKE_OSX_DEPLOYMENT_TARGET "10.5")
 
     find_package(Threads REQUIRED)
     target_link_libraries(uiohook "${CMAKE_THREAD_LIBS_INIT}")