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import os
import sys
import platform
import subprocess
from typing import TYPE_CHECKING
if TYPE_CHECKING:
from SCons import Environment
def is_active():
return True
def get_name():
return "Android"
def can_build():
return os.path.exists(get_env_android_sdk_root())
def get_opts():
return [
("ANDROID_SDK_ROOT", "Path to the Android SDK", get_env_android_sdk_root()),
("ndk_platform", 'Target platform (android-<api>, e.g. "android-24")', "android-24"),
]
# Return the ANDROID_SDK_ROOT environment variable.
def get_env_android_sdk_root():
return os.environ.get("ANDROID_SDK_ROOT", -1)
def get_min_sdk_version(platform):
return int(platform.split("-")[1])
def get_android_ndk_root(env):
return env["ANDROID_SDK_ROOT"] + "/ndk/" + get_ndk_version()
# This is kept in sync with the value in 'platform/android/java/app/config.gradle'.
def get_ndk_version():
return "23.2.8568313"
def get_flags():
return [
("arch", "arm64"), # Default for convenience.
("target", "template_debug"),
]
# Check if Android NDK version is installed
# If not, install it.
def install_ndk_if_needed(env):
print("Checking for Android NDK...")
sdk_root = env["ANDROID_SDK_ROOT"]
if not os.path.exists(get_android_ndk_root(env)):
extension = ".bat" if os.name == "nt" else ""
sdkmanager = sdk_root + "/cmdline-tools/latest/bin/sdkmanager" + extension
if os.path.exists(sdkmanager):
# Install the Android NDK
print("Installing Android NDK...")
ndk_download_args = "ndk;" + get_ndk_version()
subprocess.check_call([sdkmanager, ndk_download_args])
else:
print("Cannot find " + sdkmanager)
print(
"Please ensure ANDROID_SDK_ROOT is correct and cmdline-tools are installed, or install NDK version "
+ get_ndk_version()
+ " manually."
)
sys.exit()
env["ANDROID_NDK_ROOT"] = get_android_ndk_root(env)
def configure(env: "Environment"):
# Validate arch.
supported_arches = ["x86_32", "x86_64", "arm32", "arm64"]
if env["arch"] not in supported_arches:
print(
'Unsupported CPU architecture "%s" for Android. Supported architectures are: %s.'
% (env["arch"], ", ".join(supported_arches))
)
sys.exit()
install_ndk_if_needed(env)
ndk_root = env["ANDROID_NDK_ROOT"]
# Architecture
if get_min_sdk_version(env["ndk_platform"]) < 21 and env["arch"] in ["x86_64", "arm64"]:
print(
'WARNING: arch="%s" is not supported with "ndk_platform" lower than "android-21". Forcing platform 21.'
% env["arch"]
)
env["ndk_platform"] = "android-21"
if env["arch"] == "arm32":
target_triple = "armv7a-linux-androideabi"
env.extra_suffix = ".armv7" + env.extra_suffix
elif env["arch"] == "arm64":
target_triple = "aarch64-linux-android"
env.extra_suffix = ".armv8" + env.extra_suffix
elif env["arch"] == "x86_32":
target_triple = "i686-linux-android"
env.extra_suffix = ".x86" + env.extra_suffix
elif env["arch"] == "x86_64":
target_triple = "x86_64-linux-android"
env.extra_suffix = ".x86_64" + env.extra_suffix
target_option = ["-target", target_triple + str(get_min_sdk_version(env["ndk_platform"]))]
env.Append(ASFLAGS=[target_option, "-c"])
env.Append(CCFLAGS=target_option)
env.Append(LINKFLAGS=target_option)
# LTO
if env["lto"] == "auto": # LTO benefits for Android (size, performance) haven't been clearly established yet.
env["lto"] = "none"
if env["lto"] != "none":
if env["lto"] == "thin":
env.Append(CCFLAGS=["-flto=thin"])
env.Append(LINKFLAGS=["-flto=thin"])
else:
env.Append(CCFLAGS=["-flto"])
env.Append(LINKFLAGS=["-flto"])
# Compiler configuration
env["SHLIBSUFFIX"] = ".so"
if env["PLATFORM"] == "win32":
env.use_windows_spawn_fix()
if sys.platform.startswith("linux"):
host_subpath = "linux-x86_64"
elif sys.platform.startswith("darwin"):
host_subpath = "darwin-x86_64"
elif sys.platform.startswith("win"):
if platform.machine().endswith("64"):
host_subpath = "windows-x86_64"
else:
host_subpath = "windows"
toolchain_path = ndk_root + "/toolchains/llvm/prebuilt/" + host_subpath
compiler_path = toolchain_path + "/bin"
env["CC"] = compiler_path + "/clang"
env["CXX"] = compiler_path + "/clang++"
env["AR"] = compiler_path + "/llvm-ar"
env["RANLIB"] = compiler_path + "/llvm-ranlib"
env["AS"] = compiler_path + "/clang"
# Disable exceptions and rtti on non-tools (template) builds
if env.editor_build:
env.Append(CXXFLAGS=["-frtti"])
elif env["builtin_icu"]:
env.Append(CXXFLAGS=["-frtti", "-fno-exceptions"])
else:
env.Append(CXXFLAGS=["-fno-rtti", "-fno-exceptions"])
# Don't use dynamic_cast, necessary with no-rtti.
env.Append(CPPDEFINES=["NO_SAFE_CAST"])
env.Append(
CCFLAGS=(
"-fpic -ffunction-sections -funwind-tables -fstack-protector-strong -fvisibility=hidden -fno-strict-aliasing".split()
)
)
env.Append(CPPDEFINES=["NO_STATVFS", "GLES_ENABLED"])
if get_min_sdk_version(env["ndk_platform"]) >= 24:
env.Append(CPPDEFINES=[("_FILE_OFFSET_BITS", 64)])
if env["arch"] == "x86_32":
# The NDK adds this if targeting API < 24, so we can drop it when Godot targets it at least
env.Append(CCFLAGS=["-mstackrealign"])
elif env["arch"] == "arm32":
env.Append(CCFLAGS="-march=armv7-a -mfloat-abi=softfp".split())
env.Append(CPPDEFINES=["__ARM_ARCH_7__", "__ARM_ARCH_7A__"])
env.Append(CPPDEFINES=["__ARM_NEON__"])
elif env["arch"] == "arm64":
env.Append(CCFLAGS=["-mfix-cortex-a53-835769"])
env.Append(CPPDEFINES=["__ARM_ARCH_8A__"])
# Link flags
env.Append(LINKFLAGS="-Wl,--gc-sections -Wl,--no-undefined -Wl,-z,now".split())
env.Append(LINKFLAGS="-Wl,-soname,libgodot_android.so")
env.Prepend(CPPPATH=["#platform/android"])
env.Append(CPPDEFINES=["ANDROID_ENABLED", "UNIX_ENABLED", "NO_FCNTL"])
env.Append(LIBS=["OpenSLES", "EGL", "GLESv2", "android", "log", "z", "dl"])
if env["vulkan"]:
env.Append(CPPDEFINES=["VULKAN_ENABLED"])
if not env["use_volk"]:
env.Append(LIBS=["vulkan"])
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