c2a669a9f0
Many contributors (me included) did not fully understand what CCFLAGS, CXXFLAGS and CPPFLAGS refer to exactly, and were thus not using them in the way they are intended to be. As per the SCons manual: https://www.scons.org/doc/HTML/scons-user/apa.html - CCFLAGS: General options that are passed to the C and C++ compilers. - CFLAGS: General options that are passed to the C compiler (C only; not C++). - CXXFLAGS: General options that are passed to the C++ compiler. By default, this includes the value of $CCFLAGS, so that setting $CCFLAGS affects both C and C++ compilation. - CPPFLAGS: User-specified C preprocessor options. These will be included in any command that uses the C preprocessor, including not just compilation of C and C++ source files [...], but also [...] Fortran [...] and [...] assembly language source file[s]. TL;DR: Compiler options go to CCFLAGS, unless they must be restricted to either C (CFLAGS) or C++ (CXXFLAGS). Preprocessor defines go to CPPFLAGS.
320 lines
12 KiB
Python
320 lines
12 KiB
Python
import os
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import sys
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import platform
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from distutils.version import LooseVersion
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def is_active():
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return True
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def get_name():
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return "Android"
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def can_build():
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return ("ANDROID_NDK_ROOT" in os.environ)
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def get_platform(platform):
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return int(platform.split("-")[1])
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def get_opts():
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from SCons.Variables import BoolVariable, EnumVariable
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return [
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('ANDROID_NDK_ROOT', 'Path to the Android NDK', os.environ.get("ANDROID_NDK_ROOT", 0)),
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('ndk_platform', 'Target platform (android-<api>, e.g. "android-18")', "android-18"),
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EnumVariable('android_arch', 'Target architecture', "armv7", ('armv7', 'armv6', 'arm64v8', 'x86', 'x86_64')),
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BoolVariable('android_neon', 'Enable NEON support (armv7 only)', True),
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BoolVariable('android_stl', 'Enable Android STL support (for modules)', True)
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]
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def get_flags():
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return [
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('tools', False),
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]
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def create(env):
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tools = env['TOOLS']
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if "mingw" in tools:
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tools.remove('mingw')
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if "applelink" in tools:
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tools.remove("applelink")
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env.Tool('gcc')
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return env.Clone(tools=tools)
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def configure(env):
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# Workaround for MinGW. See:
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# http://www.scons.org/wiki/LongCmdLinesOnWin32
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if (os.name == "nt"):
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import subprocess
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def mySubProcess(cmdline, env):
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# print("SPAWNED : " + cmdline)
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startupinfo = subprocess.STARTUPINFO()
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startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
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proc = subprocess.Popen(cmdline, stdin=subprocess.PIPE, stdout=subprocess.PIPE,
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stderr=subprocess.PIPE, startupinfo=startupinfo, shell=False, env=env)
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data, err = proc.communicate()
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rv = proc.wait()
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if rv:
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print("=====")
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print(err)
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print("=====")
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return rv
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def mySpawn(sh, escape, cmd, args, env):
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newargs = ' '.join(args[1:])
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cmdline = cmd + " " + newargs
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rv = 0
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if len(cmdline) > 32000 and cmd.endswith("ar"):
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cmdline = cmd + " " + args[1] + " " + args[2] + " "
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for i in range(3, len(args)):
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rv = mySubProcess(cmdline + args[i], env)
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if rv:
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break
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else:
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rv = mySubProcess(cmdline, env)
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return rv
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env['SPAWN'] = mySpawn
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## Architecture
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if env['android_arch'] not in ['armv7', 'armv6', 'arm64v8', 'x86', 'x86_64']:
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env['android_arch'] = 'armv7'
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neon_text = ""
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if env["android_arch"] == "armv7" and env['android_neon']:
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neon_text = " (with NEON)"
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print("Building for Android (" + env['android_arch'] + ")" + neon_text)
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can_vectorize = True
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if env['android_arch'] == 'x86':
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env['ARCH'] = 'arch-x86'
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env.extra_suffix = ".x86" + env.extra_suffix
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target_subpath = "x86-4.9"
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abi_subpath = "i686-linux-android"
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arch_subpath = "x86"
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env["x86_libtheora_opt_gcc"] = True
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if env['android_arch'] == 'x86_64':
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if get_platform(env["ndk_platform"]) < 21:
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print("WARNING: android_arch=x86_64 is not supported by ndk_platform lower than android-21; setting ndk_platform=android-21")
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env["ndk_platform"] = "android-21"
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env['ARCH'] = 'arch-x86_64'
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env.extra_suffix = ".x86_64" + env.extra_suffix
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target_subpath = "x86_64-4.9"
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abi_subpath = "x86_64-linux-android"
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arch_subpath = "x86_64"
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env["x86_libtheora_opt_gcc"] = True
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elif env['android_arch'] == 'armv6':
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env['ARCH'] = 'arch-arm'
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env.extra_suffix = ".armv6" + env.extra_suffix
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target_subpath = "arm-linux-androideabi-4.9"
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abi_subpath = "arm-linux-androideabi"
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arch_subpath = "armeabi"
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can_vectorize = False
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elif env["android_arch"] == "armv7":
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env['ARCH'] = 'arch-arm'
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target_subpath = "arm-linux-androideabi-4.9"
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abi_subpath = "arm-linux-androideabi"
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arch_subpath = "armeabi-v7a"
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if env['android_neon']:
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env.extra_suffix = ".armv7.neon" + env.extra_suffix
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else:
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env.extra_suffix = ".armv7" + env.extra_suffix
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elif env["android_arch"] == "arm64v8":
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if get_platform(env["ndk_platform"]) < 21:
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print("WARNING: android_arch=arm64v8 is not supported by ndk_platform lower than android-21; setting ndk_platform=android-21")
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env["ndk_platform"] = "android-21"
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env['ARCH'] = 'arch-arm64'
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target_subpath = "aarch64-linux-android-4.9"
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abi_subpath = "aarch64-linux-android"
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arch_subpath = "arm64-v8a"
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env.extra_suffix = ".armv8" + env.extra_suffix
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## Build type
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if (env["target"].startswith("release")):
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if (env["optimize"] == "speed"): #optimize for speed (default)
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env.Append(LINKFLAGS=['-O2'])
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env.Append(CCFLAGS=['-O2', '-fomit-frame-pointer'])
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env.Append(CPPFLAGS=['-DNDEBUG'])
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else: #optimize for size
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env.Append(CCFLAGS=['-Os'])
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env.Append(CPPFLAGS=['-DNDEBUG'])
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env.Append(LINKFLAGS=['-Os'])
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if (can_vectorize):
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env.Append(CCFLAGS=['-ftree-vectorize'])
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if (env["target"] == "release_debug"):
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env.Append(CPPFLAGS=['-DDEBUG_ENABLED'])
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elif (env["target"] == "debug"):
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env.Append(LINKFLAGS=['-O0'])
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env.Append(CCFLAGS=['-O0', '-g', '-fno-limit-debug-info'])
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env.Append(CPPFLAGS=['-D_DEBUG', '-UNDEBUG', '-DDEBUG_ENABLED', '-DDEBUG_MEMORY_ENABLED'])
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## Compiler configuration
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env['SHLIBSUFFIX'] = '.so'
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if env['PLATFORM'] == 'win32':
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env.Tool('gcc')
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env.use_windows_spawn_fix()
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mt_link = True
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if (sys.platform.startswith("linux")):
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host_subpath = "linux-x86_64"
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elif (sys.platform.startswith("darwin")):
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host_subpath = "darwin-x86_64"
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elif (sys.platform.startswith('win')):
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if (platform.machine().endswith('64')):
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host_subpath = "windows-x86_64"
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else:
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mt_link = False
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host_subpath = "windows"
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if env["android_arch"] == "arm64v8":
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mt_link = False
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compiler_path = env["ANDROID_NDK_ROOT"] + "/toolchains/llvm/prebuilt/" + host_subpath + "/bin"
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gcc_toolchain_path = env["ANDROID_NDK_ROOT"] + "/toolchains/" + target_subpath + "/prebuilt/" + host_subpath
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tools_path = gcc_toolchain_path + "/" + abi_subpath + "/bin"
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# For Clang to find NDK tools in preference of those system-wide
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env.PrependENVPath('PATH', tools_path)
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ccache_path = os.environ.get("CCACHE")
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if ccache_path is None:
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env['CC'] = compiler_path + '/clang'
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env['CXX'] = compiler_path + '/clang++'
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else:
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# there aren't any ccache wrappers available for Android,
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# to enable caching we need to prepend the path to the ccache binary
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env['CC'] = ccache_path + ' ' + compiler_path + '/clang'
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env['CXX'] = ccache_path + ' ' + compiler_path + '/clang++'
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env['AR'] = tools_path + "/ar"
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env['RANLIB'] = tools_path + "/ranlib"
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env['AS'] = tools_path + "/as"
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common_opts = ['-fno-integrated-as', '-gcc-toolchain', gcc_toolchain_path]
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lib_sysroot = env["ANDROID_NDK_ROOT"] + "/platforms/" + env['ndk_platform'] + "/" + env['ARCH']
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## Compile flags
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if env['android_stl']:
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env.Append(CPPFLAGS=["-isystem", env["ANDROID_NDK_ROOT"] + "/sources/cxx-stl/llvm-libc++/include"])
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env.Append(CPPFLAGS=["-isystem", env["ANDROID_NDK_ROOT"] + "/sources/cxx-stl/llvm-libc++abi/include"])
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env.Append(CXXFLAGS=['-frtti', "-std=gnu++14"])
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else:
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env.Append(CXXFLAGS=['-fno-rtti', '-fno-exceptions'])
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env.Append(CPPFLAGS=['-DNO_SAFE_CAST'])
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ndk_version = get_ndk_version(env["ANDROID_NDK_ROOT"])
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if ndk_version != None and LooseVersion(ndk_version) >= LooseVersion("15.0.4075724"):
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print("Using NDK unified headers")
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sysroot = env["ANDROID_NDK_ROOT"] + "/sysroot"
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env.Append(CPPFLAGS=["--sysroot=" + sysroot])
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env.Append(CPPFLAGS=["-isystem", sysroot + "/usr/include/" + abi_subpath])
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env.Append(CPPFLAGS=["-isystem", env["ANDROID_NDK_ROOT"] + "/sources/android/support/include"])
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# For unified headers this define has to be set manually
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env.Append(CPPFLAGS=["-D__ANDROID_API__=" + str(get_platform(env['ndk_platform']))])
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else:
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print("Using NDK deprecated headers")
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env.Append(CPPFLAGS=["-isystem", lib_sysroot + "/usr/include"])
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env.Append(CCFLAGS='-fpic -ffunction-sections -funwind-tables -fstack-protector-strong -fvisibility=hidden -fno-strict-aliasing'.split())
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env.Append(CPPFLAGS='-DNO_STATVFS -DGLES_ENABLED'.split())
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env['neon_enabled'] = False
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if env['android_arch'] == 'x86':
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target_opts = ['-target', 'i686-none-linux-android']
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# The NDK adds this if targeting API < 21, so we can drop it when Godot targets it at least
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env.Append(CCFLAGS=['-mstackrealign'])
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elif env['android_arch'] == 'x86_64':
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target_opts = ['-target', 'x86_64-none-linux-android']
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elif env["android_arch"] == "armv6":
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target_opts = ['-target', 'armv6-none-linux-androideabi']
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env.Append(CCFLAGS='-march=armv6 -mfpu=vfp -mfloat-abi=softfp'.split())
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env.Append(CPPFLAGS=['-D__ARM_ARCH_6__'])
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elif env["android_arch"] == "armv7":
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target_opts = ['-target', 'armv7-none-linux-androideabi']
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env.Append(CCFLAGS='-march=armv7-a -mfloat-abi=softfp'.split())
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env.Append(CPPFLAGS='-D__ARM_ARCH_7__ -D__ARM_ARCH_7A__'.split())
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if env['android_neon']:
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env['neon_enabled'] = True
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env.Append(CCFLAGS=['-mfpu=neon'])
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env.Append(CPPFLAGS=['-D__ARM_NEON__'])
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else:
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env.Append(CCFLAGS=['-mfpu=vfpv3-d16'])
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elif env["android_arch"] == "arm64v8":
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target_opts = ['-target', 'aarch64-none-linux-android']
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env.Append(CCFLAGS=['-mfix-cortex-a53-835769'])
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env.Append(CPPFLAGS=['-D__ARM_ARCH_8A__'])
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env.Append(CCFLAGS=target_opts)
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env.Append(CCFLAGS=common_opts)
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## Link flags
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if ndk_version != None and LooseVersion(ndk_version) >= LooseVersion("15.0.4075724"):
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if LooseVersion(ndk_version) >= LooseVersion("17.1.4828580"):
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env.Append(LINKFLAGS=['-Wl,--exclude-libs,libgcc.a', '-Wl,--exclude-libs,libatomic.a', '-nostdlib++'])
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else:
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env.Append(LINKFLAGS=[env["ANDROID_NDK_ROOT"] + "/sources/cxx-stl/llvm-libc++/libs/" + arch_subpath + "/libandroid_support.a"])
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env.Append(LINKFLAGS=['-shared', '--sysroot=' + lib_sysroot, '-Wl,--warn-shared-textrel'])
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env.Append(LIBPATH=[env["ANDROID_NDK_ROOT"] + "/sources/cxx-stl/llvm-libc++/libs/" + arch_subpath + "/"])
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env.Append(LINKFLAGS=[env["ANDROID_NDK_ROOT"] +"/sources/cxx-stl/llvm-libc++/libs/" + arch_subpath + "/libc++_shared.so"])
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else:
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env.Append(LINKFLAGS=['-shared', '--sysroot=' + lib_sysroot, '-Wl,--warn-shared-textrel'])
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if mt_link:
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env.Append(LINKFLAGS=['-Wl,--threads'])
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if env["android_arch"] == "armv7":
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env.Append(LINKFLAGS='-Wl,--fix-cortex-a8'.split())
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env.Append(LINKFLAGS='-Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now'.split())
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env.Append(LINKFLAGS='-Wl,-soname,libgodot_android.so -Wl,--gc-sections'.split())
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env.Append(LINKFLAGS=target_opts)
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env.Append(LINKFLAGS=common_opts)
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env.Append(LIBPATH=[env["ANDROID_NDK_ROOT"] + '/toolchains/' + target_subpath + '/prebuilt/' +
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host_subpath + '/lib/gcc/' + abi_subpath + '/4.9.x'])
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env.Append(LIBPATH=[env["ANDROID_NDK_ROOT"] +
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'/toolchains/' + target_subpath + '/prebuilt/' + host_subpath + '/' + abi_subpath + '/lib'])
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env.Append(CPPPATH=['#platform/android'])
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env.Append(CPPFLAGS=['-DANDROID_ENABLED', '-DUNIX_ENABLED', '-DNO_FCNTL'])
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env.Append(LIBS=['OpenSLES', 'EGL', 'GLESv3', 'android', 'log', 'z', 'dl'])
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# Return NDK version string in source.properties (adapted from the Chromium project).
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def get_ndk_version(path):
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if path is None:
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return None
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prop_file_path = os.path.join(path, "source.properties")
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try:
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with open(prop_file_path) as prop_file:
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for line in prop_file:
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key_value = list(map(lambda x: x.strip(), line.split("=")))
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if key_value[0] == "Pkg.Revision":
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return key_value[1]
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except:
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print("Could not read source prop file '%s'" % prop_file_path)
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return None
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