android/build.py: add aarch64 support

android/build.py

@@ -29,6 +29,15 @@ android_abis = {
         'cflags': '-march=armv7-a -mfpu=vfp -mfloat-abi=softfp',
     },
 
+    'arm64-v8a': {
+        'android_api_level': '21',
+        'arch': 'aarch64-linux-android',
+        'ndk_arch': 'arm64',
+        'toolchain_arch': 'aarch64-linux-android',
+        'llvm_triple': 'aarch64-none-linux-android',
+        'cflags': '',
+    },
+
     'x86': {
         'arch': 'i686-linux-android',
         'ndk_arch': 'x86',
@@ -117,6 +126,7 @@ class AndroidNdkToolchain:
 
         self.is_arm = ndk_arch == 'arm'
         self.is_armv7 = self.is_arm and 'armv7' in self.cflags
+        self.is_aarch64 = ndk_arch == 'arm64'
         self.is_windows = False
 
         libcxx_path = os.path.join(ndk_path, 'sources/cxx-stl/llvm-libc++')

configure.ac

@@ -198,6 +198,7 @@ if test x$host_is_android = xyes; then
 
 	AS_CASE([$host_cpu],
 		[i686], [android_abi="x86"],
+		[aarch64], [android_abi="arm64-v8a"],
 		[android_abi="armeabi-v7a"])
 fi
 

python/build/ffmpeg.py

@@ -21,6 +21,8 @@ class FfmpegProject(Project):
 
         if toolchain.is_arm:
             arch = 'arm'
+        elif toolchain.is_aarch64:
+            arch = 'aarch64'
         else:
             arch = 'x86'
 

python/build/meson.py

@@ -20,6 +20,9 @@ class MesonProject(Project):
                 cpu = 'armv7'
             else:
                 cpu = 'armv6'
+        elif toolchain.is_aarch64:
+            cpu_family = 'aarch64'
+            cpu = 'arm64-v8a'
         else:
             cpu_family = 'x86'
             if 'x86_64' in toolchain.arch:

win32/build.py

@@ -65,6 +65,7 @@ class CrossGccToolchain:
 
         self.is_arm = arch.startswith('arm')
         self.is_armv7 = self.is_arm and 'armv7' in self.cflags
+        self.is_aarch64 = arch == 'aarch64'
         self.is_windows = 'mingw32' in arch
 
         self.env = dict(os.environ)