Support mac-arm64 platform (#502)

native/Makefile

@@ -52,7 +52,7 @@ NATIVE_DLL:=$(NATIVE_DIR)/$(LIBNAME)
 # For cross-compilation, install docker. See also https://github.com/dockcross/dockcross
 # Disabled linux-armv6 build because of this issue; https://github.com/dockcross/dockcross/issues/190
 native-all: linux-x86 linux-x86_64 linux-arm linux-armv6 linux-armv7 \
-	linux-arm64 linux-ppc64 win-x86 win-x86_64 mac-x86 mac-x86_64 freebsd-x86 freebsd-x86_64
+	linux-arm64 linux-ppc64 win-x86 win-x86_64 mac-x86 mac-x86_64 mac-arm64 freebsd-x86 freebsd-x86_64
 
 native: $(NATIVE_DLL)
 
@@ -95,6 +95,9 @@ mac-x86: download-includes
 mac-x86_64: download-includes
 	docker run -it --rm -v $$PWD:/workdir -e CROSS_TRIPLE=x86_64-apple-darwin multiarch/crossbuild make clean-native native OS_NAME=Mac OS_ARCH=x86_64
 
+mac-arm64: download-includes
+	docker run -it --rm -v $$PWD:/src -e TARGET=arm64-apple-darwin mcandre/snek:darwin sh -c "make clean-native native CROSS_PREFIX=arm64-apple-darwin20.4- OS_NAME=Mac OS_ARCH=arm64"
+
 freebsd-x86: download-includes
 	docker run -it --rm -v $$PWD:/workdir empterdose/freebsd-cross-build:9.3 make clean-native native CROSS_PREFIX=i386-freebsd9- OS_NAME=FreeBSD OS_ARCH=x86
 

native/Makefile.common

@@ -17,7 +17,7 @@
 
 # os=Default is meant to be generic unix/linux
 
-known_targets := Linux-x86 Linux-x86_64 Linux-arm Linux-armv6 Linux-armv7 Linux-android-arm Linux-ppc64 Mac-x86 Mac-x86_64 DragonFly-x86_64 FreeBSD-x86_64 OpenBSD-x86_64 Windows-x86 Windows-x86_64 SunOS-sparcv9 HPUX-ia64_32
+known_targets := Linux-x86 Linux-x86_64 Linux-arm Linux-armv6 Linux-armv7 Linux-android-arm Linux-ppc64 Mac-x86 Mac-x86_64 Mac-arm64 DragonFly-x86_64 FreeBSD-x86_64 OpenBSD-x86_64 Windows-x86 Windows-x86_64 SunOS-sparcv9 HPUX-ia64_32
 target := $(OS_NAME)-$(OS_ARCH)
 
 ifeq (,$(findstring $(strip $(target)),$(known_targets)))
@@ -143,6 +143,14 @@ Mac-x86_64_LINKFLAGS := -dynamiclib
 Mac-x86_64_LIBNAME   := libmvndnative.jnilib
 Mac-x86_64_JANSI_FLAGS  := 
 
+Mac-arm64_CC        := $(CROSS_PREFIX)clang -v
+Mac-arm64_STRIP     := $(CROSS_PREFIX)strip -x
+MAC_SDK := /usr/local/osxcross/SDK/MacOSX11.3.sdk/
+Mac-arm64_CCFLAGS    := -I$(MAC_SDK)/System/Library/Frameworks/JavaVM.framework/Headers -Itarget/inc -Itarget/inc/unix -Os -fPIC -mmacosx-version-min=11.0 -fvisibility=hidden
+Mac-arm64_LINKFLAGS := -shared
+Mac-arm64_LIBNAME   := libmvndnative.jnilib
+Mac-arm64_JANSI_FLAGS  :=
+
 Windows-x86_CC           := $(CROSS_PREFIX)gcc
 Windows-x86_STRIP        := $(CROSS_PREFIX)strip
 Windows-x86_CCFLAGS      := -D_JNI_IMPLEMENTATION_ -Itarget/inc -Itarget/inc/windows -Os