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require "json"
class MRuby::Toolchain::Android
DEFAULT_ARCH = 'armeabi-v7a' # TODO : Revise if arch should have a default
DEFAULT_TOOLCHAIN = :clang
DEFAULT_NDK_HOMES = %w{
/usr/local/opt/android-sdk/ndk-bundle
/usr/local/opt/android-ndk
~/Android/Sdk/ndk-bundle
%LOCALAPPDATA%/Android/android-sdk/ndk-bundle
%LOCALAPPDATA%/Android/android-ndk
%LOCALAPPDATA%/Android/Sdk/ndk/*
~/Library/Android/sdk/ndk-bundle
~/Library/Android/ndk
/opt/android-ndk
}
TOOLCHAINS = [:clang]
ARCHITECTURES = %w{
armeabi-v7a arm64-v8a
x86 x86_64
}
class AndroidNDKHomeNotFound < StandardError
def message
<<-EOM
Couldn't find Android NDK Home.
Set ANDROID_NDK_HOME environment variable or set :ndk_home parameter
EOM
end
end
attr_reader :params
def initialize(params)
@params = params
end
def bin(command)
command = command.to_s
toolchain_path.join('bin', command).to_s
end
def home_path
@home_path ||= Pathname.new(
params[:ndk_home] ||
ENV['ANDROID_NDK_HOME'] ||
DEFAULT_NDK_HOMES.find { |path|
path.gsub! '%LOCALAPPDATA%', ENV['LOCALAPPDATA'] || '%LOCALAPPDATA%'
path.gsub! '\\', '/'
path.gsub! '~', Dir.home || '~'
path.gsub!('*') do
next nil unless path[-1] == "*"
dirs = Dir.glob(path).collect do |d|
m = d.match(/(\d+)\.(\d+)\.(\d+)$/)
m ? [m[1], m[2], m[3]].collect(&:to_i) : nil
end
dirs.compact!
dirs.sort! do |before, after|
f = 0
if (f = (after.first <=> before.first)) != 0
next f
elsif (f = (after[1] <=> before[1])) != 0
next f
else
next after.last <=> before.last
end
end
dirs.empty? ? nil.to_s : dirs.first.join(".")
end
File.directory?(path)
} || raise(AndroidNDKHomeNotFound)
)
end
def toolchain
@toolchain ||= params.fetch(:toolchain){ DEFAULT_TOOLCHAIN }
end
def toolchain_path
@toolchain_path ||= home_path.join('toolchains', 'llvm' , 'prebuilt', host_platform)
end
def host_platform
@host_platform ||= case RUBY_PLATFORM
when /cygwin|mswin|mingw|bccwin|wince|emx/i
path = home_path.join('toolchains', 'llvm' , 'prebuilt', 'windows*')
Dir.glob(path.to_s){ |item|
next if File.file?(item)
path = Pathname.new(item)
break
}
path.basename
when /x86_64-darwin/i
'darwin-x86_64'
when /darwin/i
'darwin-x86'
when /x86_64-linux/i
'linux-x86_64'
when /linux/i
'linux-x86'
else
raise NotImplementedError, "Unknown host platform (#{RUBY_PLATFORM})"
end
end
def arch
@arch ||= (params[:arch] || ENV['ANDROID_ARCH'] || DEFAULT_ARCH).to_s
end
def armeabi_v7a_mfpu
@armeabi_v7a_mfpu ||= (params[:mfpu] || 'vfpv3-d16').to_s
end
def armeabi_v7a_mfloat_abi
@armeabi_v7a_mfloat_abi ||= (params[:mfloat_abi] || 'softfp').to_s
end
def sdk_version
@sdk_version ||= params[:sdk_version]
if !@sdk_version then
# Higher SDK version will be used.
json = nil
File.open(home_path + "meta/platforms.json") do |f|
json = JSON.load(f)
end
@sdk_version = json["max"]
end
@sdk_version
end
def no_warn_mismatch
if %W(soft softfp).include? armeabi_v7a_mfloat_abi
''
else
',--no-warn-mismatch'
end
end
def cc
case toolchain
when :clang then bin('clang')
end
end
def ar
case toolchain
when :clang then bin('llvm-ar')
end
end
def ctarget
flags = []
v = sdk_version
case toolchain
when :clang
case arch
when /armeabi-v7a/ then flags += %W(-target armv7a-linux-androideabi#{v} -mfpu=#{armeabi_v7a_mfpu} -mfloat-abi=#{armeabi_v7a_mfloat_abi})
when /arm64-v8a/ then flags += %W(-target aarch64-linux-android#{v})
when /x86_64/ then flags += %W(-target x86_64-linux-android#{v})
when /x86/ then flags += %W(-target i686-linux-android#{v})
end
end
flags
end
def cflags
flags = []
case RUBY_PLATFORM
when /mswin|mingw|win32/
# Build for Android don't need window flag
flags += %W(-U_WIN32 -U_WIN64)
end
flags += %W(-MMD -MP -D__android__ -DANDROID)
flags += ctarget
flags += %W(-fpic -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes)
flags
end
def ldflags
flags = []
flags
end
def ldflags_before_libraries
flags = []
v = sdk_version
case toolchain
when :clang
case arch
when /armeabi-v7a/ then flags += %W(-target armv7-none-linux-androideabi#{v} -Wl,--fix-cortex-a8#{no_warn_mismatch})
when /arm64-v8a/ then flags += %W(-target aarch64-none-linux-android#{v})
when /x86_64/ then flags += %W(-target x86_64-none-linux-android#{v})
when /x86/ then flags += %W(-target i686-none-linux-android#{v})
end
end
flags += %W(-no-canonical-prefixes)
flags
end
end
MRuby::Toolchain.new(:android) do |conf, params|
android = MRuby::Toolchain::Android.new(params)
toolchain android.toolchain
[conf.cc, conf.cxx, conf.objc, conf.asm].each do |cc|
cc.command = android.cc
cc.flags = android.cflags
end
conf.archiver.command = android.ar
conf.linker.command = android.cc
conf.linker.flags = android.ldflags
conf.linker.flags_before_libraries = android.ldflags_before_libraries
end
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