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# Download and unarchive latest Android NDK from https://developer.android.com/tools/sdk/ndk/index.html
# Make custom standalone toolchain as described here (android_ndk/docs/STANDALONE-TOOLCHAIN.html)
# Please export custom standalone toolchain path
# export ANDROID_STANDALONE_TOOLCHAIN=/tmp/android-14-toolchain
# Add to your build_config.rb
# MRuby::CrossBuild.new('androideabi') do |conf|
# toolchain :androideabi
# end
MRuby::Toolchain.new(:androideabi) do |conf|
toolchain :gcc
DEFAULT_ANDROID_TOOLCHAIN = 'gcc'
DEFAULT_ANDROID_TARGET_ARCH = 'arm'
DEFAULT_ANDROID_TARGET_ARCH_ABI = 'armeabi'
DEFAULT_ANDROID_TARGET_PLATFORM = 'android-14'
DEFAULT_GCC_VERSION = '4.6'
DEFAULT_CLANG_VERSION = '3.1'
GCC_COMMON_CFLAGS = %W(-ffunction-sections -funwind-tables -fstack-protector)
GCC_COMMON_LDFLAGS = %W()
# 'ANDROID_STANDALONE_TOOLCHAIN' or 'ANDROID_NDK_HOME' must be set.
ANDROID_STANDALONE_TOOLCHAIN = ENV['ANDROID_STANDALONE_TOOLCHAIN']
ANDROID_NDK_HOME = ENV['ANDROID_NDK_HOME']
ANDROID_TARGET_ARCH = ENV['ANDROID_TARGET_ARCH'] || DEFAULT_ANDROID_TARGET_ARCH
ANDROID_TARGET_ARCH_ABI = ENV['ANDROID_TARGET_ARCH_ABI'] || DEFAULT_ANDROID_TARGET_ARCH_ABI
ANDROID_TOOLCHAIN = ENV['ANDROID_TOOLCHAIN'] || DEFAULT_ANDROID_TOOLCHAIN
case ANDROID_TARGET_ARCH.downcase
when 'arch-arm', 'arm' then
toolchain_prefix = 'arm-linux-androideabi-'
when 'arch-x86', 'x86' then
toolchain_prefix = 'i686-linux-android-'
when 'arch-mips', 'mips' then
toolchain_prefix = 'mipsel-linux-android-'
else
# Any other architectures are not supported by Android NDK.
# Notify error.
end
if ANDROID_STANDALONE_TOOLCHAIN == nil then
if RUBY_PLATFORM.include?('darwin') then
HOST_PLATFORM = 'darwin-x86'
elsif RUBY_PLATFORM.include('linux') then
HOST_PLATFORM = 'linux-x86'
elsif RUBY_PLATFORM.include('win') then
HOST_PLATFORM = 'windows'
else
# Unknown host platform.
end
ANDROID_TARGET_PLATFORM = ENV['ANDROID_TARGET_PLATFORM'] || DEFAULT_ANDROID_TARGET_PLATFORM
path_to_toolchain = ANDROID_NDK_HOME + '/toolchains/'
path_to_sysroot = ANDROID_NDK_HOME + '/platforms/' + ANDROID_TARGET_PLATFORM
if ANDROID_TOOLCHAIN.downcase == 'gcc' then
case ANDROID_TARGET_ARCH.downcase
when 'arch-arm', 'arm' then
path_to_toolchain += 'arm-linux-androideabi-'
path_to_sysroot += '/arch-arm'
when 'arch-x86', 'x86' then
path_to_toolchain += 'x86-'
path_to_sysroot += '/arch-x86'
when 'arch-mips', 'mips' then
path_to_toolchain += 'mipsel-linux-android-'
path_to_sysroot += '/arch-mips'
else
# Any other architecture are not supported by Android NDK.
end
path_to_toolchain += DEFAULT_GCC_VERSION + '/prebuilt/' + HOST_PLATFORM
else
path_to_toolchain += 'llvm-' + DEFAULT_CLANG_VERSION + '/prebuilt/' + HOST_PLATFORM
end
else
path_to_toolchain = ANDROID_STANDALONE_TOOLCHAIN
path_to_sysroot = ANDROID_STANDALONE_TOOLCHAIN + '/sysroot'
end
SYSROOT = path_to_sysroot
case ANDROID_TARGET_ARCH.downcase
when 'arch-arm', 'arm' then
if ANDROID_TARGET_ARCH_ABI.downcase == 'armeabi-v7a' then
ARCH_CFLAGS = %W(-march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16)
ARCH_LDFLAGS = %W(-march=armv7-a -Wl,--fix-cortex-a8)
else
ARCH_CFLAGS = %W(-march=armv5te -mtune=xscale -msoft-float)
ARCH_LDFLAGS = %W()
end
when 'arch-x86', 'x86' then
ARCH_CFLAGS = %W()
ARCH_LDFLAGS = %W()
when 'arch-mips', 'mips' then
ARCH_CFLAGS = %W(-fpic -fno-strict-aliasing -finline-functions -fmessage-length=0 -fno-inline-functions-called-once -fgcse-after-reload -frerun-cse-after-loop -frename-registers)
ARCH_LDFLAGS = %W()
else
# Notify error
end
case ANDROID_TOOLCHAIN.downcase
when 'gcc' then
ANDROID_CC = path_to_toolchain + '/bin/' + toolchain_prefix + 'gcc'
ANDROID_LD = path_to_toolchain + '/bin/' + toolchain_prefix + 'gcc'
ANDROID_AR = path_to_toolchain + '/bin/' + toolchain_prefix + 'ar'
ANDROID_CFLAGS = GCC_COMMON_CFLAGS + %W(-mandroid --sysroot=#{SYSROOT}) + ARCH_CFLAGS
ANDROID_LDFLAGS = GCC_COMMON_LDFLAGS + %W(-mandroid --sysroot=#{SYSROOT}) + ARCH_LDFLAGS
when 'clang' then
# clang is not supported yet.
when 'clang31', 'clang3.1' then
# clang is not supported yet.
else
# Any other toolchains are not supported by Android NDK.
# Notify error.
end
[conf.cc, conf.cxx, conf.objc, conf.asm].each do |cc|
cc.command = ENV['CC'] || ANDROID_CC
cc.flags = [ENV['CFLAGS'] || ANDROID_CFLAGS]
end
conf.linker.command = ENV['LD'] || ANDROID_LD
conf.linker.flags = [ENV['LDFLAGS'] || ANDROID_LDFLAGS]
conf.archiver.command = ENV['AR'] || ANDROID_AR
end
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