build(binding): macOS ARM64 native binaries (#223)

Co-authored-by: @Tom-Ski @zly2006

buildSrc/src/main/groovy/tool/generator/GenerateLibs.groovy

@@ -19,6 +19,7 @@ class GenerateLibs extends DefaultTask {
     private final boolean forWindows = buildEnvs?.contains('windows')
     private final boolean forLinux = buildEnvs?.contains('linux')
     private final boolean forMac = buildEnvs?.contains('macos')
+    private final boolean forMacArm64 = buildEnvs?.contains('macosarm64')
 
     private final boolean isLocal = System.properties.containsKey('local')
     private final boolean withFreeType = Boolean.valueOf(System.properties.getProperty('freetype', 'false'))
@@ -105,6 +106,16 @@ class GenerateLibs extends DefaultTask {
             buildTargets += mac64
         }
 
+        if (forMacArm64) {
+            def minMacOsVersion = '10.15'
+            def macArm64 = BuildTarget.newDefaultTarget(BuildTarget.TargetOs.MacOsX, true, true)
+            macArm64.cppFlags += ' -std=c++14'
+            macArm64.cppFlags = macArm64.cppFlags.replace('10.7', minMacOsVersion)
+            macArm64.linkerFlags = macArm64.linkerFlags.replace('10.7', minMacOsVersion)
+            addFreeTypeIfEnabled(macArm64)
+            buildTargets += macArm64
+        }
+
         new AntScriptGenerator().generate(buildConfig, buildTargets)
 
         // Generate native libraries
@@ -118,6 +129,8 @@ class GenerateLibs extends DefaultTask {
             BuildExecutor.executeAnt(jniDir + '/build-linux64.xml', commonParams)
         if (forMac)
             BuildExecutor.executeAnt(jniDir + '/build-macosx64.xml', commonParams)
+        if (forMacArm64)
+            BuildExecutor.executeAnt(jniDir + '/build-macosxarm64.xml', commonParams)
 
         BuildExecutor.executeAnt(jniDir + '/build.xml', '-v', 'pack-natives')
     }