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opencv/android/android.toolchain.cmake
Andrey Kamaev ab9311947a Update Android CMake toolchain for NDK r8c
2012-11-20 15:20:04 +04:00

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CMake
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# Copyright (c) 2010-2011, Ethan Rublee
# Copyright (c) 2011-2012, Andrey Kamaev
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# 3. The name of the copyright holders may be used to endorse or promote
# products derived from this software without specific prior written
# permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
# ------------------------------------------------------------------------------
# Android CMake toolchain file, for use with the Android NDK r5-r8
# Requires cmake 2.6.3 or newer (2.8.5 or newer is recommended).
# See home page: https://github.com/taka-no-me/android-cmake
#
# The file is mantained by the OpenCV project. The latest version can be get at
# http://code.opencv.org/projects/opencv/repository/revisions/master/changes/android/android.toolchain.cmake
#
# Usage Linux:
# $ export ANDROID_NDK=/absolute/path/to/the/android-ndk
# $ mkdir build && cd build
# $ cmake -DCMAKE_TOOLCHAIN_FILE=path/to/the/android.toolchain.cmake ..
# $ make -j8
#
# Usage Linux (using standalone toolchain):
# $ export ANDROID_STANDALONE_TOOLCHAIN=/absolute/path/to/android-toolchain
# $ mkdir build && cd build
# $ cmake -DCMAKE_TOOLCHAIN_FILE=path/to/the/android.toolchain.cmake ..
# $ make -j8
#
# Usage Windows:
# You need native port of make to build your project.
# Android NDK r7 (or newer) already has make.exe on board.
# For older NDK you have to install it separately.
# For example, this one: http://gnuwin32.sourceforge.net/packages/make.htm
#
# $ SET ANDROID_NDK=C:\absolute\path\to\the\android-ndk
# $ mkdir build && cd build
# $ cmake.exe -G"MinGW Makefiles"
# -DCMAKE_TOOLCHAIN_FILE=path\to\the\android.toolchain.cmake
# -DCMAKE_MAKE_PROGRAM="%ANDROID_NDK%\prebuilt\windows\bin\make.exe" ..
# $ cmake.exe --build .
#
#
# Options (can be set as cmake parameters: -D<option_name>=<value>):
# ANDROID_NDK=/opt/android-ndk - path to the NDK root.
# Can be set as environment variable. Can be set only at first cmake run.
#
# ANDROID_STANDALONE_TOOLCHAIN=/opt/android-toolchain - path to the
# standalone toolchain. This option is not used if full NDK is found
# (ignored if ANDROID_NDK is set).
# Can be set as environment variable. Can be set only at first cmake run.
#
# ANDROID_ABI=armeabi-v7a - specifies the target Application Binary
# Interface (ABI). This option nearly matches to the APP_ABI variable
# used by ndk-build tool from Android NDK.
#
# Possible targets are:
# "armeabi" - matches to the NDK ABI with the same name.
# See ${ANDROID_NDK}/docs/CPU-ARCH-ABIS.html for the documentation.
# "armeabi-v7a" - matches to the NDK ABI with the same name.
# See ${ANDROID_NDK}/docs/CPU-ARCH-ABIS.html for the documentation.
# "armeabi-v7a with NEON" - same as armeabi-v7a, but
# sets NEON as floating-point unit
# "armeabi-v7a with VFPV3" - same as armeabi-v7a, but
# sets VFPV3 as floating-point unit (has 32 registers instead of 16).
# "armeabi-v6 with VFP" - tuned for ARMv6 processors having VFP.
# "x86" - matches to the NDK ABI with the same name.
# See ${ANDROID_NDK}/docs/CPU-ARCH-ABIS.html for the documentation.
# "mips" - matches to the NDK ABI with the same name
# (It is not tested on real devices by the authos of this toolchain)
# See ${ANDROID_NDK}/docs/CPU-ARCH-ABIS.html for the documentation.
#
# ANDROID_NATIVE_API_LEVEL=android-8 - level of Android API compile for.
# Option is read-only when standalone toolchain is used.
#
# ANDROID_TOOLCHAIN_NAME=arm-linux-androideabi-4.6 - the name of compiler
# toolchain to be used. The list of possible values depends on the NDK
# version. For NDK r8c the possible values are:
#
# * arm-linux-androideabi-4.4.3
# * arm-linux-androideabi-4.6
# * arm-linux-androideabi-clang3.1
# * mipsel-linux-android-4.4.3
# * mipsel-linux-android-4.6
# * mipsel-linux-android-clang3.1
# * x86-4.4.3
# * x86-4.6
# * x86-clang3.1
#
# ANDROID_FORCE_ARM_BUILD=OFF - set ON to generate 32-bit ARM instructions
# instead of Thumb. Is not available for "x86" (inapplicable) and
# "armeabi-v6 with VFP" (is forced to be ON) ABIs.
#
# ANDROID_NO_UNDEFINED=ON - set ON to show all undefined symbols as linker
# errors even if they are not used.
#
# ANDROID_SO_UNDEFINED=OFF - set ON to allow undefined symbols in shared
# libraries. Automatically turned for NDK r5x and r6x due to GLESv2
# problems.
#
# LIBRARY_OUTPUT_PATH_ROOT=${CMAKE_SOURCE_DIR} - where to output binary
# files. See additional details below.
#
# ANDROID_SET_OBSOLETE_VARIABLES=ON - if set, then toolchain defines some
# obsolete variables which were used by previous versions of this file for
# backward compatibility.
#
# ANDROID_STL=gnustl_static - specify the runtime to use.
#
# Possible values are:
# none -> Do not configure the runtime.
# system -> Use the default minimal system C++ runtime library.
# Implies -fno-rtti -fno-exceptions.
# Is not available for standalone toolchain.
# system_re -> Use the default minimal system C++ runtime library.
# Implies -frtti -fexceptions.
# Is not available for standalone toolchain.
# gabi++_static -> Use the GAbi++ runtime as a static library.
# Implies -frtti -fno-exceptions.
# Available for NDK r7 and newer.
# Is not available for standalone toolchain.
# gabi++_shared -> Use the GAbi++ runtime as a shared library.
# Implies -frtti -fno-exceptions.
# Available for NDK r7 and newer.
# Is not available for standalone toolchain.
# stlport_static -> Use the STLport runtime as a static library.
# Implies -fno-rtti -fno-exceptions for NDK before r7.
# Implies -frtti -fno-exceptions for NDK r7 and newer.
# Is not available for standalone toolchain.
# stlport_shared -> Use the STLport runtime as a shared library.
# Implies -fno-rtti -fno-exceptions for NDK before r7.
# Implies -frtti -fno-exceptions for NDK r7 and newer.
# Is not available for standalone toolchain.
# gnustl_static -> Use the GNU STL as a static library.
# Implies -frtti -fexceptions.
# gnustl_shared -> Use the GNU STL as a shared library.
# Implies -frtti -fno-exceptions.
# Available for NDK r7b and newer.
# Silently degrades to gnustl_static if not available.
#
# ANDROID_STL_FORCE_FEATURES=ON - turn rtti and exceptions support based on
# chosen runtime. If disabled, then the user is responsible for settings
# these options.
#
# What?:
# android-cmake toolchain searches for NDK/toolchain in the following order:
# ANDROID_NDK - cmake parameter
# ANDROID_NDK - environment variable
# ANDROID_STANDALONE_TOOLCHAIN - cmake parameter
# ANDROID_STANDALONE_TOOLCHAIN - environment variable
# ANDROID_NDK - default locations
# ANDROID_STANDALONE_TOOLCHAIN - default locations
#
# Make sure to do the following in your scripts:
# SET( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${my_cxx_flags}" )
# SET( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${my_cxx_flags}" )
# The flags will be prepopulated with critical flags, so don't loose them.
# Also be aware that toolchain also sets configuration-specific compiler
# flags and linker flags.
#
# ANDROID and BUILD_ANDROID will be set to true, you may test any of these
# variables to make necessary Android-specific configuration changes.
#
# Also ARMEABI or ARMEABI_V7A or X86 or MIPS will be set true, mutually
# exclusive. NEON option will be set true if VFP is set to NEON.
#
# LIBRARY_OUTPUT_PATH_ROOT should be set in cache to determine where Android
# libraries will be installed.
# Default is ${CMAKE_SOURCE_DIR}, and the android libs will always be
# under the ${LIBRARY_OUTPUT_PATH_ROOT}/libs/${ANDROID_NDK_ABI_NAME}
# (depending on the target ABI). This is convenient for Android packaging.
#
# Change Log:
# - initial version December 2010
# - April 2011
# [+] added possibility to build with NDK (without standalone toolchain)
# [+] support cross-compilation on Windows (native, no cygwin support)
# [+] added compiler option to force "char" type to be signed
# [+] added toolchain option to compile to 32-bit ARM instructions
# [+] added toolchain option to disable SWIG search
# [+] added platform "armeabi-v7a with VFPV3"
# [~] ARM_TARGETS renamed to ARM_TARGET
# [+] EXECUTABLE_OUTPUT_PATH is set by toolchain (required on Windows)
# [~] Fixed bug with ANDROID_API_LEVEL variable
# [~] turn off SWIG search if it is not found first time
# - May 2011
# [~] ANDROID_LEVEL is renamed to ANDROID_API_LEVEL
# [+] ANDROID_API_LEVEL is detected by toolchain if not specified
# [~] added guard to prevent changing of output directories on the first
# cmake pass
# [~] toolchain exits with error if ARM_TARGET is not recognized
# - June 2011
# [~] default NDK path is updated for version r5c
# [+] variable CMAKE_SYSTEM_PROCESSOR is set based on ARM_TARGET
# [~] toolchain install directory is added to linker paths
# [-] removed SWIG-related stuff from toolchain
# [+] added macro find_host_package, find_host_program to search
# packages/programs on the host system
# [~] fixed path to STL library
# - July 2011
# [~] fixed options caching
# [~] search for all supported NDK versions
# [~] allowed spaces in NDK path
# - September 2011
# [~] updated for NDK r6b
# - November 2011
# [*] rewritten for NDK r7
# [+] x86 toolchain support (experimental)
# [+] added "armeabi-v6 with VFP" ABI for ARMv6 processors.
# [~] improved compiler and linker flags management
# [+] support different build flags for Release and Debug configurations
# [~] by default compiler flags the same as used by ndk-build (but only
# where reasonable)
# [~] ANDROID_NDK_TOOLCHAIN_ROOT is splitted to ANDROID_STANDALONE_TOOLCHAIN
# and ANDROID_TOOLCHAIN_ROOT
# [~] ARM_TARGET is renamed to ANDROID_ABI
# [~] ARMEABI_NDK_NAME is renamed to ANDROID_NDK_ABI_NAME
# [~] ANDROID_API_LEVEL is renamed to ANDROID_NATIVE_API_LEVEL
# - January 2012
# [+] added stlport_static support (experimental)
# [+] added special check for cygwin
# [+] filtered out hidden files (starting with .) while globbing inside NDK
# [+] automatically applied GLESv2 linkage fix for NDK revisions 5-6
# [+] added ANDROID_GET_ABI_RAWNAME to get NDK ABI names by CMake flags
# - February 2012
# [+] updated for NDK r7b
# [~] fixed cmake try_compile() command
# [~] Fix for missing install_name_tool on OS X
# - March 2012
# [~] fixed incorrect C compiler flags
# [~] fixed CMAKE_SYSTEM_PROCESSOR change on ANDROID_ABI change
# [+] improved toolchain loading speed
# [+] added assembler language support (.S)
# [+] allowed preset search paths and extra search suffixes
# - April 2012
# [+] updated for NDK r7c
# [~] fixed most of problems with compiler/linker flags and caching
# [+] added option ANDROID_FUNCTION_LEVEL_LINKING
# - May 2012
# [+] updated for NDK r8
# [+] added mips architecture support
# - August 2012
# [+] updated for NDK r8b
# [~] all intermediate files generated by toolchain are moved to CMakeFiles
# [~] libstdc++ and libsupc are removed from explicit link libraries
# [+] added CCache support (via NDK_CCACHE environment or cmake variable)
# [+] added gold linker support for NDK r8b
# [~] fixed mips linker flags for NDK r8b
# - September 2012
# [+] added NDK release name detection (see ANDROID_NDK_RELEASE)
# [+] added support for all C++ runtimes from NDK
# (system, gabi++, stlport, gnustl)
# [+] improved warnings on known issues of NDKs
# [~] use gold linker as default if available (NDK r8b)
# [~] globally turned off rpath
# [~] compiler options are aligned with NDK r8b
# - October 2012
# [~] fixed C++ linking: explicitly link with math library (OpenCV #2426)
# - November 2012
# [+] updated for NDK r8c
# [+] added support for clang compiler
# ------------------------------------------------------------------------------
cmake_minimum_required( VERSION 2.6.3 )
if( DEFINED CMAKE_CROSSCOMPILING )
# subsequent toolchain loading is not really needed
return()
endif()
get_property( _CMAKE_IN_TRY_COMPILE GLOBAL PROPERTY IN_TRY_COMPILE )
if( _CMAKE_IN_TRY_COMPILE )
include( "${CMAKE_CURRENT_SOURCE_DIR}/../android.toolchain.config.cmake" OPTIONAL )
endif()
# this one is important
set( CMAKE_SYSTEM_NAME Linux )
# this one not so much
set( CMAKE_SYSTEM_VERSION 1 )
# rpath makes low sence for Android
set( CMAKE_SKIP_RPATH TRUE CACHE BOOL "If set, runtime paths are not added when using shared libraries." )
set( ANDROID_SUPPORTED_NDK_VERSIONS ${ANDROID_EXTRA_NDK_VERSIONS} -r8c -r8b -r8 -r7c -r7b -r7 -r6b -r6 -r5c -r5b -r5 "" )
if(NOT DEFINED ANDROID_NDK_SEARCH_PATHS)
if( CMAKE_HOST_WIN32 )
file( TO_CMAKE_PATH "$ENV{PROGRAMFILES}" ANDROID_NDK_SEARCH_PATHS )
set( ANDROID_NDK_SEARCH_PATHS "${ANDROID_NDK_SEARCH_PATHS}/android-ndk" "$ENV{SystemDrive}/NVPACK/android-ndk" )
else()
file( TO_CMAKE_PATH "$ENV{HOME}" ANDROID_NDK_SEARCH_PATHS )
set( ANDROID_NDK_SEARCH_PATHS /opt/android-ndk "${ANDROID_NDK_SEARCH_PATHS}/NVPACK/android-ndk" )
endif()
endif()
if(NOT DEFINED ANDROID_STANDALONE_TOOLCHAIN_SEARCH_PATH)
set( ANDROID_STANDALONE_TOOLCHAIN_SEARCH_PATH /opt/android-toolchain )
endif()
set( ANDROID_SUPPORTED_ABIS_arm "armeabi-v7a;armeabi;armeabi-v7a with NEON;armeabi-v7a with VFPV3;armeabi-v6 with VFP" )
set( ANDROID_SUPPORTED_ABIS_x86 "x86" )
set( ANDROID_SUPPORTED_ABIS_mipsel "mips" )
set( ANDROID_DEFAULT_NDK_API_LEVEL 8 )
set( ANDROID_DEFAULT_NDK_API_LEVEL_x86 9 )
set( ANDROID_DEFAULT_NDK_API_LEVEL_mips 9 )
macro( __LIST_FILTER listvar regex )
if( ${listvar} )
foreach( __val ${${listvar}} )
if( __val MATCHES "${regex}" )
list( REMOVE_ITEM ${listvar} "${__val}" )
endif()
endforeach()
endif()
endmacro()
macro( __INIT_VARIABLE var_name )
set( __test_path 0 )
foreach( __var ${ARGN} )
if( __var STREQUAL "PATH" )
set( __test_path 1 )
break()
endif()
endforeach()
if( __test_path AND NOT EXISTS "${${var_name}}" )
unset( ${var_name} CACHE )
endif()
if( "${${var_name}}" STREQUAL "" )
set( __values 0 )
foreach( __var ${ARGN} )
if( __var STREQUAL "VALUES" )
set( __values 1 )
elseif( NOT __var STREQUAL "PATH" )
set( __obsolete 0 )
if( __var MATCHES "^OBSOLETE_.*$" )
string( REPLACE "OBSOLETE_" "" __var "${__var}" )
set( __obsolete 1 )
endif()
if( __var MATCHES "^ENV_.*$" )
string( REPLACE "ENV_" "" __var "${__var}" )
set( __value "$ENV{${__var}}" )
elseif( DEFINED ${__var} )
set( __value "${${__var}}" )
else()
if( __values )
set( __value "${__var}" )
else()
set( __value "" )
endif()
endif()
if( NOT "${__value}" STREQUAL "" )
if( __test_path )
if( EXISTS "${__value}" )
file( TO_CMAKE_PATH "${__value}" ${var_name} )
if( __obsolete AND NOT _CMAKE_IN_TRY_COMPILE )
message( WARNING "Using value of obsolete variable ${__var} as initial value for ${var_name}. Please note, that ${__var} can be completely removed in future versions of the toolchain." )
endif()
break()
endif()
else()
set( ${var_name} "${__value}" )
if( __obsolete AND NOT _CMAKE_IN_TRY_COMPILE )
message( WARNING "Using value of obsolete variable ${__var} as initial value for ${var_name}. Please note, that ${__var} can be completely removed in future versions of the toolchain." )
endif()
break()
endif()
endif()
endif()
endforeach()
unset( __value )
unset( __values )
unset( __obsolete )
elseif( __test_path )
file( TO_CMAKE_PATH "${${var_name}}" ${var_name} )
endif()
unset( __test_path )
endmacro()
macro( __DETECT_NATIVE_API_LEVEL _var _path )
SET( __ndkApiLevelRegex "^[\t ]*#define[\t ]+__ANDROID_API__[\t ]+([0-9]+)[\t ]*$" )
FILE( STRINGS ${_path} __apiFileContent REGEX "${__ndkApiLevelRegex}" )
if( NOT __apiFileContent )
message( SEND_ERROR "Could not get Android native API level. Probably you have specified invalid level value, or your copy of NDK/toolchain is broken." )
endif()
string( REGEX REPLACE "${__ndkApiLevelRegex}" "\\1" ${_var} "${__apiFileContent}" )
unset( __apiFileContent )
unset( __ndkApiLevelRegex )
endmacro()
macro( __DETECT_TOOLCHAIN_MACHINE_NAME _var _root )
if( EXISTS "${_root}" )
file( GLOB __gccExePath RELATIVE "${_root}/bin/" "${_root}/bin/*-gcc${TOOL_OS_SUFFIX}" )
__LIST_FILTER( __gccExePath "^[.].*" )
list( LENGTH __gccExePath __gccExePathsCount )
if( NOT __gccExePathsCount EQUAL 1 AND NOT _CMAKE_IN_TRY_COMPILE )
message( WARNING "Could not determine machine name for compiler from ${_root}" )
set( ${_var} "" )
else()
get_filename_component( __gccExeName "${__gccExePath}" NAME_WE )
string( REPLACE "-gcc" "" ${_var} "${__gccExeName}" )
endif()
unset( __gccExePath )
unset( __gccExePathsCount )
unset( __gccExeName )
else()
set( ${_var} "" )
endif()
endmacro()
# fight against cygwin
set( ANDROID_FORBID_SYGWIN TRUE CACHE BOOL "Prevent cmake from working under cygwin and using cygwin tools")
mark_as_advanced( ANDROID_FORBID_SYGWIN )
if( ANDROID_FORBID_SYGWIN )
if( CYGWIN )
message( FATAL_ERROR "Android NDK and android-cmake toolchain are not welcome Cygwin. It is unlikely that this cmake toolchain will work under cygwin. But if you want to try then you can set cmake variable ANDROID_FORBID_SYGWIN to FALSE and rerun cmake." )
endif()
if( CMAKE_HOST_WIN32 )
# remove cygwin from PATH
set( __new_path "$ENV{PATH}")
__LIST_FILTER( __new_path "cygwin" )
set(ENV{PATH} "${__new_path}")
unset(__new_path)
endif()
endif()
# detect current host platform
set( TOOL_OS_SUFFIX "" )
if( CMAKE_HOST_APPLE )
set( ANDROID_NDK_HOST_SYSTEM_NAME "darwin-x86" )
elseif( CMAKE_HOST_WIN32 )
set( ANDROID_NDK_HOST_SYSTEM_NAME "windows" )
set( TOOL_OS_SUFFIX ".exe" )
elseif( CMAKE_HOST_UNIX )
set( ANDROID_NDK_HOST_SYSTEM_NAME "linux-x86" )
else()
message( FATAL_ERROR "Cross-compilation on your platform is not supported by this cmake toolchain" )
endif()
# see if we have path to Android NDK
__INIT_VARIABLE( ANDROID_NDK PATH ENV_ANDROID_NDK )
if( NOT ANDROID_NDK )
# see if we have path to Android standalone toolchain
__INIT_VARIABLE( ANDROID_STANDALONE_TOOLCHAIN PATH ENV_ANDROID_STANDALONE_TOOLCHAIN OBSOLETE_ANDROID_NDK_TOOLCHAIN_ROOT OBSOLETE_ENV_ANDROID_NDK_TOOLCHAIN_ROOT )
if( NOT ANDROID_STANDALONE_TOOLCHAIN )
#try to find Android NDK in one of the the default locations
set( __ndkSearchPaths )
foreach( __ndkSearchPath ${ANDROID_NDK_SEARCH_PATHS} )
foreach( suffix ${ANDROID_SUPPORTED_NDK_VERSIONS} )
list( APPEND __ndkSearchPaths "${__ndkSearchPath}${suffix}" )
endforeach()
endforeach()
__INIT_VARIABLE( ANDROID_NDK PATH VALUES ${__ndkSearchPaths} )
unset( __ndkSearchPaths )
if( ANDROID_NDK )
message( STATUS "Using default path for Android NDK: ${ANDROID_NDK}" )
message( STATUS " If you prefer to use a different location, please define a cmake or environment variable: ANDROID_NDK" )
else()
#try to find Android standalone toolchain in one of the the default locations
__INIT_VARIABLE( ANDROID_STANDALONE_TOOLCHAIN PATH ANDROID_STANDALONE_TOOLCHAIN_SEARCH_PATH )
if( ANDROID_STANDALONE_TOOLCHAIN )
message( STATUS "Using default path for standalone toolchain ${ANDROID_STANDALONE_TOOLCHAIN}" )
message( STATUS " If you prefer to use a different location, please define the variable: ANDROID_STANDALONE_TOOLCHAIN" )
endif( ANDROID_STANDALONE_TOOLCHAIN )
endif( ANDROID_NDK )
endif( NOT ANDROID_STANDALONE_TOOLCHAIN )
endif( NOT ANDROID_NDK )
# remember found paths
if( ANDROID_NDK )
get_filename_component( ANDROID_NDK "${ANDROID_NDK}" ABSOLUTE )
# try to detect change
if( CMAKE_AR )
string( LENGTH "${ANDROID_NDK}" __length )
string( SUBSTRING "${CMAKE_AR}" 0 ${__length} __androidNdkPreviousPath )
if( NOT __androidNdkPreviousPath STREQUAL ANDROID_NDK )
message( FATAL_ERROR "It is not possible to change the path to the NDK on subsequent CMake run. You must remove all generated files from your build folder first.
" )
endif()
unset( __androidNdkPreviousPath )
unset( __length )
endif()
set( ANDROID_NDK "${ANDROID_NDK}" CACHE INTERNAL "Path of the Android NDK" FORCE )
set( BUILD_WITH_ANDROID_NDK True )
file( STRINGS "${ANDROID_NDK}/RELEASE.TXT" ANDROID_NDK_RELEASE LIMIT_COUNT 1 REGEX r[0-9]+[a-z]? )
elseif( ANDROID_STANDALONE_TOOLCHAIN )
get_filename_component( ANDROID_STANDALONE_TOOLCHAIN "${ANDROID_STANDALONE_TOOLCHAIN}" ABSOLUTE )
# try to detect change
if( CMAKE_AR )
string( LENGTH "${ANDROID_STANDALONE_TOOLCHAIN}" __length )
string( SUBSTRING "${CMAKE_AR}" 0 ${__length} __androidStandaloneToolchainPreviousPath )
if( NOT __androidStandaloneToolchainPreviousPath STREQUAL ANDROID_STANDALONE_TOOLCHAIN )
message( FATAL_ERROR "It is not possible to change path to the Android standalone toolchain on subsequent run." )
endif()
unset( __androidStandaloneToolchainPreviousPath )
unset( __length )
endif()
set( ANDROID_STANDALONE_TOOLCHAIN "${ANDROID_STANDALONE_TOOLCHAIN}" CACHE INTERNAL "Path of the Android standalone toolchain" FORCE )
set( BUILD_WITH_STANDALONE_TOOLCHAIN True )
else()
list(GET ANDROID_NDK_SEARCH_PATHS 0 ANDROID_NDK_SEARCH_PATH)
message( FATAL_ERROR "Could not find neither Android NDK nor Android standalone toolchain.
You should either set an environment variable:
export ANDROID_NDK=~/my-android-ndk
or
export ANDROID_STANDALONE_TOOLCHAIN=~/my-android-toolchain
or put the toolchain or NDK in the default path:
sudo ln -s ~/my-android-ndk ${ANDROID_NDK_SEARCH_PATH}
sudo ln -s ~/my-android-toolchain ${ANDROID_STANDALONE_TOOLCHAIN_SEARCH_PATH}" )
endif()
# get all the details about standalone toolchain
if( BUILD_WITH_STANDALONE_TOOLCHAIN )
__DETECT_NATIVE_API_LEVEL( ANDROID_SUPPORTED_NATIVE_API_LEVELS "${ANDROID_STANDALONE_TOOLCHAIN}/sysroot/usr/include/android/api-level.h" )
set( ANDROID_STANDALONE_TOOLCHAIN_API_LEVEL ${ANDROID_SUPPORTED_NATIVE_API_LEVELS} )
set( __availableToolchains "standalone" )
__DETECT_TOOLCHAIN_MACHINE_NAME( __availableToolchainMachines "${ANDROID_STANDALONE_TOOLCHAIN}" )
if( NOT __availableToolchainMachines )
message( FATAL_ERROR "Could not determine machine name of your toolchain. Probably your Android standalone toolchain is broken." )
endif()
if( __availableToolchainMachines MATCHES i686 )
set( __availableToolchainArchs "x86" )
elseif( __availableToolchainMachines MATCHES arm )
set( __availableToolchainArchs "arm" )
elseif( __availableToolchainMachines MATCHES mipsel )
set( __availableToolchainArchs "mipsel" )
endif()
execute_process( COMMAND "${ANDROID_STANDALONE_TOOLCHAIN}/bin/${__availableToolchainMachines}-gcc${TOOL_OS_SUFFIX}" -dumpversion
OUTPUT_VARIABLE __availableToolchainCompilerVersions OUTPUT_STRIP_TRAILING_WHITESPACE )
string( REGEX MATCH "[0-9]+[.][0-9]+([.][0-9]+)?" __availableToolchainCompilerVersions "${__availableToolchainCompilerVersions}" )
if( EXISTS "${ANDROID_STANDALONE_TOOLCHAIN}/bin/clang${TOOL_OS_SUFFIX}" )
list( APPEND __availableToolchains "standalone-clang" )
list( APPEND __availableToolchainMachines ${__availableToolchainMachines} )
list( APPEND __availableToolchainArchs ${__availableToolchainArchs} )
list( APPEND __availableToolchainCompilerVersions ${__availableToolchainCompilerVersions} )
endif()
endif()
macro( __GLOB_NDK_TOOLCHAINS __availableToolchainsVar )
foreach( __toolchain ${${__availableToolchainsVar}} )
if( "${__toolchain}" MATCHES "-clang3[.][0-9]$" AND NOT EXISTS "${ANDROID_NDK}/toolchains/${__toolchain}/prebuilt/" )
string( REGEX REPLACE "-clang3[.][0-9]$" "-4.6" __gcc_toolchain "${__toolchain}" )
else()
set( __gcc_toolchain "${__toolchain}" )
endif()
__DETECT_TOOLCHAIN_MACHINE_NAME( __machine "${ANDROID_NDK}/toolchains/${__gcc_toolchain}/prebuilt/${ANDROID_NDK_HOST_SYSTEM_NAME}" )
if( __machine )
string( REGEX MATCH "[0-9]+[.][0-9]+([.][0-9]+)?$" __version "${__gcc_toolchain}" )
string( REGEX MATCH "^[^-]+" __arch "${__gcc_toolchain}" )
list( APPEND __availableToolchainMachines "${__machine}" )
list( APPEND __availableToolchainArchs "${__arch}" )
list( APPEND __availableToolchainCompilerVersions "${__version}" )
else()
list( REMOVE_ITEM ${__availableToolchainsVar} "${__toolchain}" )
endif()
unset( __gcc_toolchain )
endforeach()
endmacro()
# get all the details about NDK
if( BUILD_WITH_ANDROID_NDK )
file( GLOB ANDROID_SUPPORTED_NATIVE_API_LEVELS RELATIVE "${ANDROID_NDK}/platforms" "${ANDROID_NDK}/platforms/android-*" )
string( REPLACE "android-" "" ANDROID_SUPPORTED_NATIVE_API_LEVELS "${ANDROID_SUPPORTED_NATIVE_API_LEVELS}" )
set( __availableToolchains "" )
set( __availableToolchainMachines "" )
set( __availableToolchainArchs "" )
set( __availableToolchainCompilerVersions "" )
if( ANDROID_TOOLCHAIN_NAME AND EXISTS "${ANDROID_NDK}/toolchains/${ANDROID_TOOLCHAIN_NAME}/" )
# do not go through all toolchains if we know the name
set( __availableToolchains "${ANDROID_TOOLCHAIN_NAME}" )
__GLOB_NDK_TOOLCHAINS( __availableToolchains )
endif()
if( NOT __availableToolchains )
file( GLOB __availableToolchains RELATIVE "${ANDROID_NDK}/toolchains" "${ANDROID_NDK}/toolchains/*" )
__LIST_FILTER( __availableToolchains "^[.]" )
__LIST_FILTER( __availableToolchains "llvm" )
__GLOB_NDK_TOOLCHAINS( __availableToolchains )
endif()
if( NOT __availableToolchains )
message( FATAL_ERROR "Could not find any working toolchain in the NDK. Probably your Android NDK is broken." )
endif()
endif()
# build list of available ABIs
set( ANDROID_SUPPORTED_ABIS "" )
set( __uniqToolchainArchNames ${__availableToolchainArchs} )
list( REMOVE_DUPLICATES __uniqToolchainArchNames )
list( SORT __uniqToolchainArchNames )
foreach( __arch ${__uniqToolchainArchNames} )
list( APPEND ANDROID_SUPPORTED_ABIS ${ANDROID_SUPPORTED_ABIS_${__arch}} )
endforeach()
unset( __uniqToolchainArchNames )
if( NOT ANDROID_SUPPORTED_ABIS )
message( FATAL_ERROR "No one of known Android ABIs is supported by this cmake toolchain." )
endif()
# choose target ABI
__INIT_VARIABLE( ANDROID_ABI OBSOLETE_ARM_TARGET OBSOLETE_ARM_TARGETS VALUES ${ANDROID_SUPPORTED_ABIS} )
# verify that target ABI is supported
list( FIND ANDROID_SUPPORTED_ABIS "${ANDROID_ABI}" __androidAbiIdx )
if( __androidAbiIdx EQUAL -1 )
string( REPLACE ";" "\", \"", PRINTABLE_ANDROID_SUPPORTED_ABIS "${ANDROID_SUPPORTED_ABIS}" )
message( FATAL_ERROR "Specified ANDROID_ABI = \"${ANDROID_ABI}\" is not supported by this cmake toolchain or your NDK/toolchain.
Supported values are: \"${PRINTABLE_ANDROID_SUPPORTED_ABIS}\"
" )
endif()
unset( __androidAbiIdx )
# set target ABI options
if( ANDROID_ABI STREQUAL "x86" )
set( X86 true )
set( ANDROID_NDK_ABI_NAME "x86" )
set( ANDROID_ARCH_NAME "x86" )
set( ANDROID_ARCH_FULLNAME "x86" )
set( ANDROID_LLVM_TRIPLE "i686-none-linux-android" )
set( CMAKE_SYSTEM_PROCESSOR "i686" )
elseif( ANDROID_ABI STREQUAL "mips" )
set( MIPS true )
set( ANDROID_NDK_ABI_NAME "mips" )
set( ANDROID_ARCH_NAME "mips" )
set( ANDROID_ARCH_FULLNAME "mipsel" )
set( ANDROID_LLVM_TRIPLE "mipsel-none-linux-android" )
set( CMAKE_SYSTEM_PROCESSOR "mips" )
elseif( ANDROID_ABI STREQUAL "armeabi" )
set( ARMEABI true )
set( ANDROID_NDK_ABI_NAME "armeabi" )
set( ANDROID_ARCH_NAME "arm" )
set( ANDROID_ARCH_FULLNAME "arm" )
set( ANDROID_LLVM_TRIPLE "armv5te-none-linux-androideabi" )
set( CMAKE_SYSTEM_PROCESSOR "armv5te" )
elseif( ANDROID_ABI STREQUAL "armeabi-v6 with VFP" )
set( ARMEABI_V6 true )
set( ANDROID_NDK_ABI_NAME "armeabi" )
set( ANDROID_ARCH_NAME "arm" )
set( ANDROID_ARCH_FULLNAME "arm" )
set( ANDROID_LLVM_TRIPLE "armv5te-none-linux-androideabi" )
set( CMAKE_SYSTEM_PROCESSOR "armv6" )
# need always fallback to older platform
set( ARMEABI true )
elseif( ANDROID_ABI STREQUAL "armeabi-v7a")
set( ARMEABI_V7A true )
set( ANDROID_NDK_ABI_NAME "armeabi-v7a" )
set( ANDROID_ARCH_NAME "arm" )
set( ANDROID_ARCH_FULLNAME "arm" )
set( ANDROID_LLVM_TRIPLE "armv7-none-linux-androideabi" )
set( CMAKE_SYSTEM_PROCESSOR "armv7-a" )
elseif( ANDROID_ABI STREQUAL "armeabi-v7a with VFPV3" )
set( ARMEABI_V7A true )
set( ANDROID_NDK_ABI_NAME "armeabi-v7a" )
set( ANDROID_ARCH_NAME "arm" )
set( ANDROID_ARCH_FULLNAME "arm" )
set( ANDROID_LLVM_TRIPLE "armv7-none-linux-androideabi" )
set( CMAKE_SYSTEM_PROCESSOR "armv7-a" )
set( VFPV3 true )
elseif( ANDROID_ABI STREQUAL "armeabi-v7a with NEON" )
set( ARMEABI_V7A true )
set( ANDROID_NDK_ABI_NAME "armeabi-v7a" )
set( ANDROID_ARCH_NAME "arm" )
set( ANDROID_ARCH_FULLNAME "arm" )
set( ANDROID_LLVM_TRIPLE "armv7-none-linux-androideabi" )
set( CMAKE_SYSTEM_PROCESSOR "armv7-a" )
set( VFPV3 true )
set( NEON true )
else()
message( SEND_ERROR "Unknown ANDROID_ABI=\"${ANDROID_ABI}\" is specified." )
endif()
if( CMAKE_BINARY_DIR AND EXISTS "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeSystem.cmake" )
# really dirty hack
# it is not possible to change CMAKE_SYSTEM_PROCESSOR after the first run...
file( APPEND "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeSystem.cmake" "SET(CMAKE_SYSTEM_PROCESSOR \"${CMAKE_SYSTEM_PROCESSOR}\")\n" )
endif()
if( ANDROID_ARCH_NAME STREQUAL "arm" AND NOT ARMEABI_V6 )
__INIT_VARIABLE( ANDROID_FORCE_ARM_BUILD OBSOLETE_FORCE_ARM VALUES OFF )
set( ANDROID_FORCE_ARM_BUILD ${ANDROID_FORCE_ARM_BUILD} CACHE BOOL "Use 32-bit ARM instructions instead of Thumb-1" FORCE )
mark_as_advanced( ANDROID_FORCE_ARM_BUILD )
else()
unset( ANDROID_FORCE_ARM_BUILD CACHE )
endif()
# choose toolchain
if( ANDROID_TOOLCHAIN_NAME )
list( FIND __availableToolchains "${ANDROID_TOOLCHAIN_NAME}" __toolchainIdx )
if( __toolchainIdx EQUAL -1 )
list( SORT __availableToolchains )
string( REPLACE ";" "\n * " toolchains_list "${__availableToolchains}" )
set( toolchains_list " * ${toolchains_list}")
message( FATAL_ERROR "Specified toolchain \"${ANDROID_TOOLCHAIN_NAME}\" is missing in your NDK or broken. Please verify that your NDK is working or select another compiler toolchain.
To configure the toolchain set CMake variable ANDROID_TOOLCHAIN_NAME to one of the following values:\n${toolchains_list}\n" )
endif()
list( GET __availableToolchainArchs ${__toolchainIdx} __toolchainArch )
if( NOT __toolchainArch STREQUAL ANDROID_ARCH_FULLNAME )
message( SEND_ERROR "Selected toolchain \"${ANDROID_TOOLCHAIN_NAME}\" is not able to compile binaries for the \"${ANDROID_ARCH_NAME}\" platform." )
endif()
else()
set( __toolchainIdx -1 )
set( __applicableToolchains "" )
set( __toolchainMaxVersion "0.0.0" )
list( LENGTH __availableToolchains __availableToolchainsCount )
math( EXPR __availableToolchainsCount "${__availableToolchainsCount}-1" )
foreach( __idx RANGE ${__availableToolchainsCount} )
list( GET __availableToolchainArchs ${__idx} __toolchainArch )
if( __toolchainArch STREQUAL ANDROID_ARCH_FULLNAME )
list( GET __availableToolchainCompilerVersions ${__idx} __toolchainVersion )
if( __toolchainVersion VERSION_GREATER __toolchainMaxVersion )
set( __toolchainMaxVersion "${__toolchainVersion}" )
set( __toolchainIdx ${__idx} )
endif()
endif()
endforeach()
unset( __availableToolchainsCount )
unset( __toolchainMaxVersion )
unset( __toolchainVersion )
endif()
unset( __toolchainArch )
if( __toolchainIdx EQUAL -1 )
message( FATAL_ERROR "No one of available compiler toolchains is able to compile for ${ANDROID_ARCH_NAME} platform." )
endif()
list( GET __availableToolchains ${__toolchainIdx} ANDROID_TOOLCHAIN_NAME )
list( GET __availableToolchainMachines ${__toolchainIdx} ANDROID_TOOLCHAIN_MACHINE_NAME )
list( GET __availableToolchainCompilerVersions ${__toolchainIdx} ANDROID_COMPILER_VERSION )
unset( __toolchainIdx )
unset( __availableToolchains )
unset( __availableToolchainMachines )
unset( __availableToolchainArchs )
unset( __availableToolchainCompilerVersions )
# choose native API level
__INIT_VARIABLE( ANDROID_NATIVE_API_LEVEL ENV_ANDROID_NATIVE_API_LEVEL ANDROID_API_LEVEL ENV_ANDROID_API_LEVEL ANDROID_STANDALONE_TOOLCHAIN_API_LEVEL ANDROID_DEFAULT_NDK_API_LEVEL_${ANDROID_ARCH_NAME} ANDROID_DEFAULT_NDK_API_LEVEL )
string( REGEX MATCH "[0-9]+" ANDROID_NATIVE_API_LEVEL "${ANDROID_NATIVE_API_LEVEL}" )
# TODO: filter out unsupported levels
# validate
list( FIND ANDROID_SUPPORTED_NATIVE_API_LEVELS "${ANDROID_NATIVE_API_LEVEL}" __levelIdx )
if( __levelIdx EQUAL -1 )
message( SEND_ERROR "Specified Android native API level (${ANDROID_NATIVE_API_LEVEL}) is not supported by your NDK/toolchain." )
else()
if( BUILD_WITH_ANDROID_NDK )
__DETECT_NATIVE_API_LEVEL( __realApiLevel "${ANDROID_NDK}/platforms/android-${ANDROID_NATIVE_API_LEVEL}/arch-${ANDROID_ARCH_NAME}/usr/include/android/api-level.h" )
if( NOT __realApiLevel EQUAL ANDROID_NATIVE_API_LEVEL )
message( SEND_ERROR "Specified Android API level (${ANDROID_NATIVE_API_LEVEL}) does not match to the level found (${__realApiLevel}). Probably your copy of NDK is broken." )
endif()
unset( __realApiLevel )
endif()
set( ANDROID_NATIVE_API_LEVEL "${ANDROID_NATIVE_API_LEVEL}" CACHE STRING "Android API level for native code" FORCE )
if( CMAKE_VERSION VERSION_GREATER "2.8" )
list( SORT ANDROID_SUPPORTED_NATIVE_API_LEVELS )
set_property( CACHE ANDROID_NATIVE_API_LEVEL PROPERTY STRINGS ${ANDROID_SUPPORTED_NATIVE_API_LEVELS} )
endif()
endif()
unset( __levelIdx )
# remember target ABI
set( ANDROID_ABI "${ANDROID_ABI}" CACHE STRING "The target ABI for Android. If arm, then armeabi-v7a is recommended for hardware floating point." FORCE )
if( CMAKE_VERSION VERSION_GREATER "2.8" )
list( SORT ANDROID_SUPPORTED_ABIS_${ANDROID_ARCH_FULLNAME} )
set_property( CACHE ANDROID_ABI PROPERTY STRINGS ${ANDROID_SUPPORTED_ABIS_${ANDROID_ARCH_FULLNAME}} )
endif()
# runtime choice (STL, rtti, exceptions)
if( NOT ANDROID_STL )
# honor legacy ANDROID_USE_STLPORT
if( DEFINED ANDROID_USE_STLPORT )
if( ANDROID_USE_STLPORT )
set( ANDROID_STL stlport_static )
endif()
message( WARNING "You are using an obsolete variable ANDROID_USE_STLPORT to select the STL variant. Use -DANDROID_STL=stlport_static instead." )
endif()
if( NOT ANDROID_STL )
set( ANDROID_STL gnustl_static )
endif()
endif()
set( ANDROID_STL "${ANDROID_STL}" CACHE STRING "C++ runtime" )
set( ANDROID_STL_FORCE_FEATURES ON CACHE BOOL "automatically configure rtti and exceptions support based on C++ runtime" )
mark_as_advanced( ANDROID_STL ANDROID_STL_FORCE_FEATURES )
if( BUILD_WITH_ANDROID_NDK )
if( NOT "${ANDROID_STL}" MATCHES "^(none|system|system_re|gabi\\+\\+_static|gabi\\+\\+_shared|stlport_static|stlport_shared|gnustl_static|gnustl_shared)$")
message( FATAL_ERROR "ANDROID_STL is set to invalid value \"${ANDROID_STL}\".
The possible values are:
none -> Do not configure the runtime.
system -> Use the default minimal system C++ runtime library.
system_re -> Same as system but with rtti and exceptions.
gabi++_static -> Use the GAbi++ runtime as a static library.
gabi++_shared -> Use the GAbi++ runtime as a shared library.
stlport_static -> Use the STLport runtime as a static library.
stlport_shared -> Use the STLport runtime as a shared library.
gnustl_static -> (default) Use the GNU STL as a static library.
gnustl_shared -> Use the GNU STL as a shared library.
" )
endif()
elseif( BUILD_WITH_STANDALONE_TOOLCHAIN )
if( NOT "${ANDROID_STL}" MATCHES "^(none|gnustl_static|gnustl_shared)$")
message( FATAL_ERROR "ANDROID_STL is set to invalid value \"${ANDROID_STL}\".
The possible values are:
none -> Do not configure the runtime.
gnustl_static -> (default) Use the GNU STL as a static library.
gnustl_shared -> Use the GNU STL as a shared library.
" )
endif()
endif()
unset( ANDROID_RTTI )
unset( ANDROID_EXCEPTIONS )
unset( ANDROID_STL_INCLUDE_DIRS )
unset( __libstl )
unset( __libsupcxx )
if( NOT _CMAKE_IN_TRY_COMPILE AND ANDROID_NDK_RELEASE STREQUAL "r7b" AND ARMEABI_V7A AND NOT VFPV3 AND ANDROID_STL MATCHES "gnustl" )
message( WARNING "The GNU STL armeabi-v7a binaries from NDK r7b can crash non-NEON devices. The files provided with NDK r7b were not configured properly, resulting in crashes on Tegra2-based devices and others when trying to use certain floating-point functions (e.g., cosf, sinf, expf).
You are strongly recommended to switch to another NDK release.
" )
endif()
if( NOT _CMAKE_IN_TRY_COMPILE AND X86 AND ANDROID_STL MATCHES "gnustl" AND ANDROID_NDK_RELEASE STREQUAL "r6" )
message( WARNING "The x86 system header file from NDK r6 has incorrect definition for ptrdiff_t. You are recommended to upgrade to a newer NDK release or manually patch the header:
See https://android.googlesource.com/platform/development.git f907f4f9d4e56ccc8093df6fee54454b8bcab6c2
diff --git a/ndk/platforms/android-9/arch-x86/include/machine/_types.h b/ndk/platforms/android-9/arch-x86/include/machine/_types.h
index 5e28c64..65892a1 100644
--- a/ndk/platforms/android-9/arch-x86/include/machine/_types.h
+++ b/ndk/platforms/android-9/arch-x86/include/machine/_types.h
@@ -51,7 +51,11 @@ typedef long int ssize_t;
#endif
#ifndef _PTRDIFF_T
#define _PTRDIFF_T
-typedef long ptrdiff_t;
+# ifdef __ANDROID__
+ typedef int ptrdiff_t;
+# else
+ typedef long ptrdiff_t;
+# endif
#endif
" )
endif()
# setup paths and STL for standalone toolchain
if( BUILD_WITH_STANDALONE_TOOLCHAIN )
set( ANDROID_TOOLCHAIN_ROOT "${ANDROID_STANDALONE_TOOLCHAIN}" )
set( ANDROID_CLANG_TOOLCHAIN_ROOT "${ANDROID_STANDALONE_TOOLCHAIN}" )
set( ANDROID_SYSROOT "${ANDROID_STANDALONE_TOOLCHAIN}/sysroot" )
if( NOT ANDROID_STL STREQUAL "none" )
set( ANDROID_STL_INCLUDE_DIRS "${ANDROID_STANDALONE_TOOLCHAIN}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}" )
if( ARMEABI_V7A AND EXISTS "${ANDROID_STL_INCLUDE_DIRS}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/${CMAKE_SYSTEM_PROCESSOR}/bits" )
list( APPEND ANDROID_STL_INCLUDE_DIRS "${ANDROID_STL_INCLUDE_DIRS}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/${CMAKE_SYSTEM_PROCESSOR}" )
elseif( ARMEABI AND NOT ANDROID_FORCE_ARM_BUILD AND EXISTS "${ANDROID_STL_INCLUDE_DIRS}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/thumb/bits" )
list( APPEND ANDROID_STL_INCLUDE_DIRS "${ANDROID_STL_INCLUDE_DIRS}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/thumb" )
else()
list( APPEND ANDROID_STL_INCLUDE_DIRS "${ANDROID_STL_INCLUDE_DIRS}/${ANDROID_TOOLCHAIN_MACHINE_NAME}" )
endif()
# always search static GNU STL to get the location of libsupc++.a
if( ARMEABI_V7A AND NOT ANDROID_FORCE_ARM_BUILD AND EXISTS "${ANDROID_STANDALONE_TOOLCHAIN}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}/thumb/libstdc++.a" )
set( __libstl "${ANDROID_STANDALONE_TOOLCHAIN}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}/thumb" )
elseif( ARMEABI_V7A AND EXISTS "${ANDROID_STANDALONE_TOOLCHAIN}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}/libstdc++.a" )
set( __libstl "${ANDROID_STANDALONE_TOOLCHAIN}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}" )
elseif( ARMEABI AND NOT ANDROID_FORCE_ARM_BUILD AND EXISTS "${ANDROID_STANDALONE_TOOLCHAIN}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/thumb/libstdc++.a" )
set( __libstl "${ANDROID_STANDALONE_TOOLCHAIN}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/thumb" )
elseif( EXISTS "${ANDROID_STANDALONE_TOOLCHAIN}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/libstdc++.a" )
set( __libstl "${ANDROID_STANDALONE_TOOLCHAIN}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib" )
endif()
if( __libstl )
set( __libsupcxx "${__libstl}/libsupc++.a" )
set( __libstl "${__libstl}/libstdc++.a" )
endif()
if( NOT EXISTS "${__libsupcxx}" )
message( FATAL_ERROR "The required libstdsupc++.a is missing in your standalone toolchain.
Usually it happens because of bug in make-standalone-toolchain.sh script from NDK r7, r7b and r7c.
You need to either upgrade to newer NDK or manually copy
$ANDROID_NDK/sources/cxx-stl/gnu-libstdc++/libs/${ANDROID_NDK_ABI_NAME}/libsupc++.a
to
${__libsupcxx}
" )
endif()
if( ANDROID_STL STREQUAL "gnustl_shared" )
if( ARMEABI_V7A AND EXISTS "${ANDROID_STANDALONE_TOOLCHAIN}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}/libgnustl_shared.so" )
set( __libstl "${ANDROID_STANDALONE_TOOLCHAIN}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}/libgnustl_shared.so" )
elseif( ARMEABI AND NOT ANDROID_FORCE_ARM_BUILD AND EXISTS "${ANDROID_STANDALONE_TOOLCHAIN}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/thumb/libgnustl_shared.so" )
set( __libstl "${ANDROID_STANDALONE_TOOLCHAIN}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/thumb/libgnustl_shared.so" )
elseif( EXISTS "${ANDROID_STANDALONE_TOOLCHAIN}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/libgnustl_shared.so" )
set( __libstl "${ANDROID_STANDALONE_TOOLCHAIN}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/libgnustl_shared.so" )
endif()
endif()
endif()
endif()
# clang
if( "${ANDROID_TOOLCHAIN_NAME}" STREQUAL "standalone-clang" )
set( ANDROID_COMPILER_IS_CLANG 1 )
execute_process( COMMAND "${ANDROID_CLANG_TOOLCHAIN_ROOT}/bin/clang${TOOL_OS_SUFFIX}" --version OUTPUT_VARIABLE ANDROID_CLANG_VERSION OUTPUT_STRIP_TRAILING_WHITESPACE )
string( REGEX MATCH "[0-9]+[.][0-9]+" ANDROID_CLANG_VERSION "${ANDROID_CLANG_VERSION}")
elseif( "${ANDROID_TOOLCHAIN_NAME}" MATCHES "-clang3[.][0-9]?$" )
string( REGEX MATCH "3[.][0-9]$" ANDROID_CLANG_VERSION "${ANDROID_TOOLCHAIN_NAME}")
string( REGEX REPLACE "-clang${ANDROID_CLANG_VERSION}$" "-4.6" ANDROID_GCC_TOOLCHAIN_NAME "${ANDROID_TOOLCHAIN_NAME}" )
if( NOT EXISTS "${ANDROID_NDK}/toolchains/llvm-${ANDROID_CLANG_VERSION}/prebuilt/${ANDROID_NDK_HOST_SYSTEM_NAME}/bin/clang${TOOL_OS_SUFFIX}" )
message( FATAL_ERROR "Could not find the " )
endif()
set( ANDROID_COMPILER_IS_CLANG 1 )
set( ANDROID_CLANG_TOOLCHAIN_ROOT "${ANDROID_NDK}/toolchains/llvm-${ANDROID_CLANG_VERSION}/prebuilt/${ANDROID_NDK_HOST_SYSTEM_NAME}" )
else()
set( ANDROID_GCC_TOOLCHAIN_NAME "${ANDROID_TOOLCHAIN_NAME}" )
unset( ANDROID_COMPILER_IS_CLANG CACHE )
endif()
string( REPLACE "." "" _clang_name "clang${ANDROID_CLANG_VERSION}" )
if( NOT EXISTS "${ANDROID_CLANG_TOOLCHAIN_ROOT}/bin/${_clang_name}${TOOL_OS_SUFFIX}" )
set( _clang_name "clang" )
endif()
# setup paths and STL for NDK
if( BUILD_WITH_ANDROID_NDK )
set( ANDROID_TOOLCHAIN_ROOT "${ANDROID_NDK}/toolchains/${ANDROID_GCC_TOOLCHAIN_NAME}/prebuilt/${ANDROID_NDK_HOST_SYSTEM_NAME}" )
set( ANDROID_SYSROOT "${ANDROID_NDK}/platforms/android-${ANDROID_NATIVE_API_LEVEL}/arch-${ANDROID_ARCH_NAME}" )
if( ANDROID_STL STREQUAL "none" )
# do nothing
elseif( ANDROID_STL STREQUAL "system" )
set( ANDROID_RTTI OFF )
set( ANDROID_EXCEPTIONS OFF )
set( ANDROID_STL_INCLUDE_DIRS "${ANDROID_NDK}/sources/cxx-stl/system/include" )
elseif( ANDROID_STL STREQUAL "system_re" )
set( ANDROID_RTTI ON )
set( ANDROID_EXCEPTIONS ON )
set( ANDROID_STL_INCLUDE_DIRS "${ANDROID_NDK}/sources/cxx-stl/system/include" )
elseif( ANDROID_STL MATCHES "gabi" )
if( ANDROID_NDK_RELEASE STRLESS "r7" )
message( FATAL_ERROR "gabi++ is not awailable in your NDK. You have to upgrade to NDK r7 or newer to use gabi++.")
endif()
set( ANDROID_RTTI ON )
set( ANDROID_EXCEPTIONS OFF )
set( ANDROID_STL_INCLUDE_DIRS "${ANDROID_NDK}/sources/cxx-stl/gabi++/include" )
set( __libstl "${ANDROID_NDK}/sources/cxx-stl/gabi++/libs/${ANDROID_NDK_ABI_NAME}/libgabi++_static.a" )
elseif( ANDROID_STL MATCHES "stlport" )
set( ANDROID_EXCEPTIONS OFF )
if( ANDROID_NDK_RELEASE STRLESS "r7" )
set( ANDROID_RTTI OFF )
else()
set( ANDROID_RTTI ON )
endif()
set( ANDROID_STL_INCLUDE_DIRS "${ANDROID_NDK}/sources/cxx-stl/stlport/stlport" )
set( __libstl "${ANDROID_NDK}/sources/cxx-stl/stlport/libs/${ANDROID_NDK_ABI_NAME}/libstlport_static.a" )
elseif( ANDROID_STL MATCHES "gnustl" )
set( ANDROID_EXCEPTIONS ON )
set( ANDROID_RTTI ON )
if( EXISTS "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/${ANDROID_COMPILER_VERSION}" )
set( __libstl "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/${ANDROID_COMPILER_VERSION}" )
else()
set( __libstl "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++" )
endif()
set( ANDROID_STL_INCLUDE_DIRS "${__libstl}/include" "${__libstl}/libs/${ANDROID_NDK_ABI_NAME}/include" )
if( EXISTS "${__libstl}/libs/${ANDROID_NDK_ABI_NAME}/libgnustl_static.a" )
set( __libstl "${__libstl}/libs/${ANDROID_NDK_ABI_NAME}/libgnustl_static.a" )
else()
set( __libstl "${__libstl}/libs/${ANDROID_NDK_ABI_NAME}/libstdc++.a" )
endif()
else()
message( FATAL_ERROR "Unknown runtime: ${ANDROID_STL}" )
endif()
# find libsupc++.a - rtti & exceptions
if( ANDROID_STL STREQUAL "system_re" OR ANDROID_STL MATCHES "gnustl" )
if( ANDROID_NDK_RELEASE STRGREATER "r8" ) # r8b
set( __libsupcxx "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/${ANDROID_COMPILER_VERSION}/libs/${ANDROID_NDK_ABI_NAME}/libsupc++.a" )
elseif( NOT ANDROID_NDK_RELEASE STRLESS "r7" AND ANDROID_NDK_RELEASE STRLESS "r8b")
set( __libsupcxx "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/libs/${ANDROID_NDK_ABI_NAME}/libsupc++.a" )
else( ANDROID_NDK_RELEASE STRLESS "r7" )
if( ARMEABI_V7A )
if( ANDROID_FORCE_ARM_BUILD )
set( __libsupcxx "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}/libsupc++.a" )
else()
set( __libsupcxx "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}/thumb/libsupc++.a" )
endif()
elseif( ARMEABI AND NOT ANDROID_FORCE_ARM_BUILD )
set( __libsupcxx "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/thumb/libsupc++.a" )
else()
set( __libsupcxx "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/libsupc++.a" )
endif()
endif()
if( NOT EXISTS "${__libsupcxx}")
message( ERROR "Could not find libsupc++.a for a chosen platform. Either your NDK is not supported or is broken.")
endif()
endif()
endif()
# case of shared STL linkage
if( ANDROID_STL MATCHES "shared" AND DEFINED __libstl )
string( REPLACE "_static.a" "_shared.so" __libstl "${__libstl}" )
if( NOT _CMAKE_IN_TRY_COMPILE AND __libstl MATCHES "[.]so$" )
get_filename_component( __libstlname "${__libstl}" NAME )
execute_process( COMMAND "${CMAKE_COMMAND}" -E copy_if_different "${__libstl}" "${LIBRARY_OUTPUT_PATH}/${__libstlname}" RESULT_VARIABLE __fileCopyProcess )
if( NOT __fileCopyProcess EQUAL 0 OR NOT EXISTS "${LIBRARY_OUTPUT_PATH}/${__libstlname}")
message( SEND_ERROR "Failed copying of ${__libstl} to the ${LIBRARY_OUTPUT_PATH}/${__libstlname}" )
endif()
unset( __fileCopyProcess )
unset( __libstlname )
endif()
endif()
# ccache support
__INIT_VARIABLE( _ndk_ccache NDK_CCACHE ENV_NDK_CCACHE )
if( _ndk_ccache )
find_program( NDK_CCACHE "${_ndk_ccache}" DOC "The path to ccache binary")
else()
unset( NDK_CCACHE CACHE )
endif()
unset( _ndk_ccache )
# setup the cross-compiler
if( NOT CMAKE_C_COMPILER )
if( NDK_CCACHE )
set( CMAKE_C_COMPILER "${NDK_CCACHE}" CACHE PATH "ccache as C compiler" )
set( CMAKE_CXX_COMPILER "${NDK_CCACHE}" CACHE PATH "ccache as C++ compiler" )
if( ANDROID_COMPILER_IS_CLANG )
set( CMAKE_C_COMPILER_ARG1 "${ANDROID_CLANG_TOOLCHAIN_ROOT}/bin/${_clang_name}${TOOL_OS_SUFFIX}" CACHE PATH "C compiler")
set( CMAKE_CXX_COMPILER_ARG1 "${ANDROID_CLANG_TOOLCHAIN_ROOT}/bin/${_clang_name}++${TOOL_OS_SUFFIX}" CACHE PATH "C++ compiler")
else()
set( CMAKE_C_COMPILER_ARG1 "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-gcc${TOOL_OS_SUFFIX}" CACHE PATH "C compiler")
set( CMAKE_CXX_COMPILER_ARG1 "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-g++${TOOL_OS_SUFFIX}" CACHE PATH "C++ compiler")
endif()
else()
if( ANDROID_COMPILER_IS_CLANG )
set( CMAKE_C_COMPILER "${ANDROID_CLANG_TOOLCHAIN_ROOT}/bin/${_clang_name}${TOOL_OS_SUFFIX}" CACHE PATH "C compiler")
set( CMAKE_CXX_COMPILER "${ANDROID_CLANG_TOOLCHAIN_ROOT}/bin/${_clang_name}++${TOOL_OS_SUFFIX}" CACHE PATH "C++ compiler")
else()
set( CMAKE_C_COMPILER "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-gcc${TOOL_OS_SUFFIX}" CACHE PATH "C compiler" )
set( CMAKE_CXX_COMPILER "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-g++${TOOL_OS_SUFFIX}" CACHE PATH "C++ compiler" )
endif()
endif()
set( CMAKE_ASM_COMPILER "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-gcc${TOOL_OS_SUFFIX}" CACHE PATH "assembler" )
set( CMAKE_STRIP "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-strip${TOOL_OS_SUFFIX}" CACHE PATH "strip" )
set( CMAKE_AR "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-ar${TOOL_OS_SUFFIX}" CACHE PATH "archive" )
set( CMAKE_LINKER "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-ld${TOOL_OS_SUFFIX}" CACHE PATH "linker" )
set( CMAKE_NM "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-nm${TOOL_OS_SUFFIX}" CACHE PATH "nm" )
set( CMAKE_OBJCOPY "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-objcopy${TOOL_OS_SUFFIX}" CACHE PATH "objcopy" )
set( CMAKE_OBJDUMP "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-objdump${TOOL_OS_SUFFIX}" CACHE PATH "objdump" )
set( CMAKE_RANLIB "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-ranlib${TOOL_OS_SUFFIX}" CACHE PATH "ranlib" )
endif()
set( _CMAKE_TOOLCHAIN_PREFIX "${ANDROID_TOOLCHAIN_MACHINE_NAME}-" )
if( CMAKE_VERSION VERSION_LESS 2.8.5 )
set( CMAKE_ASM_COMPILER_ARG1 "-c" )
endif()
if( APPLE )
find_program( CMAKE_INSTALL_NAME_TOOL NAMES install_name_tool )
if( NOT CMAKE_INSTALL_NAME_TOOL )
message( FATAL_ERROR "Could not find install_name_tool, please check your installation." )
endif()
mark_as_advanced( CMAKE_INSTALL_NAME_TOOL )
endif()
# Force set compilers because standard identification works badly for us
include( CMakeForceCompiler )
CMAKE_FORCE_C_COMPILER( "${CMAKE_C_COMPILER}" GNU )
if( ANDROID_COMPILER_IS_CLANG )
set( CMAKE_C_COMPILER_ID Clang)
endif()
set( CMAKE_C_PLATFORM_ID Linux )
set( CMAKE_C_SIZEOF_DATA_PTR 4 )
set( CMAKE_C_HAS_ISYSROOT 1 )
set( CMAKE_C_COMPILER_ABI ELF )
CMAKE_FORCE_CXX_COMPILER( "${CMAKE_CXX_COMPILER}" GNU )
if( ANDROID_COMPILER_IS_CLANG )
set( CMAKE_CXX_COMPILER_ID Clang)
endif()
set( CMAKE_CXX_PLATFORM_ID Linux )
set( CMAKE_CXX_SIZEOF_DATA_PTR 4 )
set( CMAKE_CXX_HAS_ISYSROOT 1 )
set( CMAKE_CXX_COMPILER_ABI ELF )
set( CMAKE_CXX_SOURCE_FILE_EXTENSIONS cc cp cxx cpp CPP c++ C )
# force ASM compiler (required for CMake < 2.8.5)
set( CMAKE_ASM_COMPILER_ID_RUN TRUE )
set( CMAKE_ASM_COMPILER_ID GNU )
set( CMAKE_ASM_COMPILER_WORKS TRUE )
set( CMAKE_ASM_COMPILER_FORCED TRUE )
set( CMAKE_COMPILER_IS_GNUASM 1)
set( CMAKE_ASM_SOURCE_FILE_EXTENSIONS s S asm )
# flags and definitions
remove_definitions( -DANDROID )
add_definitions( -DANDROID )
if(ANDROID_SYSROOT MATCHES "[ ;\"]")
set( ANDROID_CXX_FLAGS "--sysroot=\"${ANDROID_SYSROOT}\"" )
if( NOT _CMAKE_IN_TRY_COMPILE )
# quotes will break try_compile and compiler identification
message(WARNING "Your Android system root has non-alphanumeric symbols. It can break compiler features detection and the whole build.")
endif()
else()
set( ANDROID_CXX_FLAGS "--sysroot=${ANDROID_SYSROOT}" )
endif()
# NDK flags
if( ARMEABI OR ARMEABI_V7A )
set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -fpic -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__" )
if( NOT ANDROID_FORCE_ARM_BUILD AND NOT ARMEABI_V6 )
# It is recommended to use the -mthumb compiler flag to force the generation
# of 16-bit Thumb-1 instructions (the default being 32-bit ARM ones).
set( ANDROID_CXX_FLAGS_RELEASE "-mthumb" )
set( ANDROID_CXX_FLAGS_DEBUG "-marm -finline-limit=64" )
else()
# always compile ARMEABI_V6 in arm mode; otherwise there is no difference from ARMEABI
# O3 instead of O2/Os in release mode - like cmake sets for desktop gcc
set( ANDROID_CXX_FLAGS_RELEASE "-marm" )
set( ANDROID_CXX_FLAGS_DEBUG "-marm -finline-limit=300" )
endif()
elseif( X86 )
set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -funwind-tables" )
set( ANDROID_CXX_FLAGS_RELEASE "" )
set( ANDROID_CXX_FLAGS_DEBUG "-finline-limit=300" )
elseif( MIPS )
set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -fpic -funwind-tables -fmessage-length=0 -fno-inline-functions-called-once -frename-registers" )
set( ANDROID_CXX_FLAGS_RELEASE "-finline-limit=300 -fno-strict-aliasing" )
set( ANDROID_CXX_FLAGS_DEBUG "-finline-functions -fgcse-after-reload -frerun-cse-after-loop" )
elseif()
set( ANDROID_CXX_FLAGS_RELEASE "" )
set( ANDROID_CXX_FLAGS_DEBUG "" )
endif()
if( NOT X86 )
set( ANDROID_CXX_FLAGS "-Wno-psabi ${ANDROID_CXX_FLAGS}" )
endif()
set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -fsigned-char" ) # good/necessary when porting desktop libraries
set( ANDROID_CXX_FLAGS_RELEASE "${ANDROID_CXX_FLAGS_RELEASE} -fomit-frame-pointer" )
set( ANDROID_CXX_FLAGS_DEBUG "${ANDROID_CXX_FLAGS_DEBUG} -fno-strict-aliasing -fno-omit-frame-pointer" )
# ABI-specific flags
if( ARMEABI_V7A )
set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -march=armv7-a -mfloat-abi=softfp" )
if( NEON )
set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -mfpu=neon" )
elseif( VFPV3 )
set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -mfpu=vfpv3" )
else()
set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -mfpu=vfpv3-d16" )
endif()
elseif( ARMEABI_V6 )
set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -march=armv6 -mfloat-abi=softfp -mfpu=vfp" ) # vfp == vfpv2
elseif( ARMEABI )
set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -march=armv5te -mtune=xscale -msoft-float" )
endif()
# STL
if( EXISTS "${__libstl}" OR EXISTS "${__libsupcxx}" )
if( ANDROID_STL MATCHES "gnustl" )
set( CMAKE_CXX_CREATE_SHARED_LIBRARY "<CMAKE_C_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>" )
set( CMAKE_CXX_CREATE_SHARED_MODULE "<CMAKE_C_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>" )
set( CMAKE_CXX_LINK_EXECUTABLE "<CMAKE_C_COMPILER> <FLAGS> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>" )
else()
set( CMAKE_CXX_CREATE_SHARED_LIBRARY "<CMAKE_CXX_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>" )
set( CMAKE_CXX_CREATE_SHARED_MODULE "<CMAKE_CXX_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>" )
set( CMAKE_CXX_LINK_EXECUTABLE "<CMAKE_CXX_COMPILER> <FLAGS> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>" )
endif()
if ( X86 AND ANDROID_STL MATCHES "gnustl" AND ANDROID_NDK_RELEASE STREQUAL "r6" )
# workaround "undefined reference to `__dso_handle'" problem
set( CMAKE_CXX_CREATE_SHARED_LIBRARY "${CMAKE_CXX_CREATE_SHARED_LIBRARY} \"${ANDROID_SYSROOT}/usr/lib/crtbegin_so.o\"" )
set( CMAKE_CXX_CREATE_SHARED_MODULE "${CMAKE_CXX_CREATE_SHARED_MODULE} \"${ANDROID_SYSROOT}/usr/lib/crtbegin_so.o\"" )
endif()
if( EXISTS "${__libstl}" )
set( CMAKE_CXX_CREATE_SHARED_LIBRARY "${CMAKE_CXX_CREATE_SHARED_LIBRARY} \"${__libstl}\"" )
set( CMAKE_CXX_CREATE_SHARED_MODULE "${CMAKE_CXX_CREATE_SHARED_MODULE} \"${__libstl}\"" )
set( CMAKE_CXX_LINK_EXECUTABLE "${CMAKE_CXX_LINK_EXECUTABLE} \"${__libstl}\"" )
endif()
if( EXISTS "${__libsupcxx}" )
set( CMAKE_CXX_CREATE_SHARED_LIBRARY "${CMAKE_CXX_CREATE_SHARED_LIBRARY} \"${__libsupcxx}\"" )
set( CMAKE_CXX_CREATE_SHARED_MODULE "${CMAKE_CXX_CREATE_SHARED_MODULE} \"${__libsupcxx}\"" )
set( CMAKE_CXX_LINK_EXECUTABLE "${CMAKE_CXX_LINK_EXECUTABLE} \"${__libsupcxx}\"" )
# C objects:
set( CMAKE_C_CREATE_SHARED_LIBRARY "<CMAKE_C_COMPILER> <CMAKE_SHARED_LIBRARY_C_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_C_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>" )
set( CMAKE_C_CREATE_SHARED_MODULE "<CMAKE_C_COMPILER> <CMAKE_SHARED_LIBRARY_C_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_C_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>" )
set( CMAKE_C_LINK_EXECUTABLE "<CMAKE_C_COMPILER> <FLAGS> <CMAKE_C_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>" )
set( CMAKE_C_CREATE_SHARED_LIBRARY "${CMAKE_C_CREATE_SHARED_LIBRARY} \"${__libsupcxx}\"" )
set( CMAKE_C_CREATE_SHARED_MODULE "${CMAKE_C_CREATE_SHARED_MODULE} \"${__libsupcxx}\"" )
set( CMAKE_C_LINK_EXECUTABLE "${CMAKE_C_LINK_EXECUTABLE} \"${__libsupcxx}\"" )
endif()
if( ANDROID_STL MATCHES "gnustl" )
set( CMAKE_CXX_CREATE_SHARED_LIBRARY "${CMAKE_CXX_CREATE_SHARED_LIBRARY} -lm" )
set( CMAKE_CXX_CREATE_SHARED_MODULE "${CMAKE_CXX_CREATE_SHARED_MODULE} -lm" )
set( CMAKE_CXX_LINK_EXECUTABLE "${CMAKE_CXX_LINK_EXECUTABLE} -lm" )
endif()
endif()
# variables controlling optional build flags
if (ANDROID_NDK_RELEASE STRLESS "r7")
# libGLESv2.so in NDK's prior to r7 refers to missing external symbols.
# So this flag option is required for all projects using OpenGL from native.
__INIT_VARIABLE( ANDROID_SO_UNDEFINED VALUES ON )
else()
__INIT_VARIABLE( ANDROID_SO_UNDEFINED VALUES OFF )
endif()
__INIT_VARIABLE( ANDROID_NO_UNDEFINED OBSOLETE_NO_UNDEFINED VALUES ON )
__INIT_VARIABLE( ANDROID_FUNCTION_LEVEL_LINKING VALUES ON )
__INIT_VARIABLE( ANDROID_GOLD_LINKER VALUES ON )
__INIT_VARIABLE( ANDROID_NOEXECSTACK VALUES ON )
__INIT_VARIABLE( ANDROID_RELRO VALUES ON )
set( ANDROID_NO_UNDEFINED ${ANDROID_NO_UNDEFINED} CACHE BOOL "Show all undefined symbols as linker errors" )
set( ANDROID_SO_UNDEFINED ${ANDROID_SO_UNDEFINED} CACHE BOOL "Allows or disallows undefined symbols in shared libraries" )
set( ANDROID_FUNCTION_LEVEL_LINKING ${ANDROID_FUNCTION_LEVEL_LINKING} CACHE BOOL "Allows or disallows undefined symbols in shared libraries" )
set( ANDROID_GOLD_LINKER ${ANDROID_GOLD_LINKER} CACHE BOOL "Enables gold linker (only avaialble for NDK r8b for ARM and x86 architectures on linux-86 and darwin-x86 hosts)" )
set( ANDROID_NOEXECSTACK ${ANDROID_NOEXECSTACK} CACHE BOOL "Allows or disallows undefined symbols in shared libraries" )
set( ANDROID_RELRO ${ANDROID_RELRO} CACHE BOOL "Enables RELRO - a memory corruption mitigation technique" )
mark_as_advanced( ANDROID_NO_UNDEFINED ANDROID_SO_UNDEFINED ANDROID_FUNCTION_LEVEL_LINKING ANDROID_GOLD_LINKER ANDROID_NOEXECSTACK ANDROID_RELRO )
# linker flags
set( ANDROID_LINKER_FLAGS "" )
if( ARMEABI_V7A )
# this is *required* to use the following linker flags that routes around
# a CPU bug in some Cortex-A8 implementations:
set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -Wl,--fix-cortex-a8" )
endif()
if( ANDROID_NO_UNDEFINED )
set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -Wl,--no-undefined" )
endif()
if( ANDROID_SO_UNDEFINED )
set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -Wl,-allow-shlib-undefined" )
endif()
if( ANDROID_FUNCTION_LEVEL_LINKING )
set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -fdata-sections -ffunction-sections" )
set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -Wl,--gc-sections" )
endif()
if( ANDROID_COMPILER_VERSION VERSION_EQUAL "4.6" )
if( ANDROID_GOLD_LINKER AND (CMAKE_HOST_UNIX OR ANDROID_NDK_RELEASE STRGREATER "r8b") AND (ARMEABI OR ARMEABI_V7A OR X86) )
set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -fuse-ld=gold" )
elseif( ANDROID_NDK_RELEASE STREQUAL "r8c")
set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -fuse-ld=bfd" )
elseif( ANDROID_NDK_RELEASE STREQUAL "r8b" AND ARMEABI AND NOT _CMAKE_IN_TRY_COMPILE )
message( WARNING "The default bfd linker from arm GCC 4.6 toolchain can fail with 'unresolvable R_ARM_THM_CALL relocation' error message. See https://code.google.com/p/android/issues/detail?id=35342
On Linux and OS X host platform you can workaround this problem using gold linker (default).
Rerun cmake with -DANDROID_GOLD_LINKER=ON option in case of problems.
" )
endif()
endif() # version 4.6
if( ANDROID_NOEXECSTACK )
if( ANDROID_COMPILER_IS_CLANG )
set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -Xclang -mnoexecstack" )
else()
set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -Wa,--noexecstack" )
endif()
set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -Wl,-z,noexecstack" )
endif()
if( ANDROID_RELRO )
set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -Wl,-z,relro -Wl,-z,now" )
endif()
if( ANDROID_COMPILER_IS_CLANG )
set( ANDROID_CXX_FLAGS "-Qunused-arguments ${ANDROID_CXX_FLAGS}" )
if( ARMEABI_V7A AND NOT ANDROID_FORCE_ARM_BUILD )
set( ANDROID_CXX_FLAGS_RELEASE "-target thumbv7-none-linux-androideabi ${ANDROID_CXX_FLAGS_RELEASE}" )
set( ANDROID_CXX_FLAGS_DEBUG "-target ${ANDROID_LLVM_TRIPLE} ${ANDROID_CXX_FLAGS_DEBUG}" )
else()
set( ANDROID_CXX_FLAGS "-target ${ANDROID_LLVM_TRIPLE} ${ANDROID_CXX_FLAGS}" )
endif()
if( BUILD_WITH_ANDROID_NDK )
if(ANDROID_ARCH_NAME STREQUAL "arm" )
set( ANDROID_CXX_FLAGS "-isystem ${ANDROID_CLANG_TOOLCHAIN_ROOT}/lib/clang/${ANDROID_CLANG_VERSION}/include ${ANDROID_CXX_FLAGS}" )
endif()
set( ANDROID_CXX_FLAGS "-gcc-toolchain ${ANDROID_TOOLCHAIN_ROOT} ${ANDROID_CXX_FLAGS}" )
endif()
endif()
# cache flags
set( CMAKE_CXX_FLAGS "" CACHE STRING "c++ flags" )
set( CMAKE_C_FLAGS "" CACHE STRING "c flags" )
set( CMAKE_CXX_FLAGS_RELEASE "-O3 -DNDEBUG" CACHE STRING "c++ Release flags" )
set( CMAKE_C_FLAGS_RELEASE "-O3 -DNDEBUG" CACHE STRING "c Release flags" )
set( CMAKE_CXX_FLAGS_DEBUG "-O0 -g -DDEBUG -D_DEBUG" CACHE STRING "c++ Debug flags" )
set( CMAKE_C_FLAGS_DEBUG "-O0 -g -DDEBUG -D_DEBUG" CACHE STRING "c Debug flags" )
set( CMAKE_SHARED_LINKER_FLAGS "" CACHE STRING "shared linker flags" )
set( CMAKE_MODULE_LINKER_FLAGS "" CACHE STRING "module linker flags" )
set( CMAKE_EXE_LINKER_FLAGS "-Wl,-z,nocopyreloc" CACHE STRING "executable linker flags" )
# finish flags
set( CMAKE_CXX_FLAGS "${ANDROID_CXX_FLAGS} ${CMAKE_CXX_FLAGS}" )
set( CMAKE_C_FLAGS "${ANDROID_CXX_FLAGS} ${CMAKE_C_FLAGS}" )
set( CMAKE_CXX_FLAGS_RELEASE "${ANDROID_CXX_FLAGS_RELEASE} ${CMAKE_CXX_FLAGS_RELEASE}" )
set( CMAKE_C_FLAGS_RELEASE "${ANDROID_CXX_FLAGS_RELEASE} ${CMAKE_C_FLAGS_RELEASE}" )
set( CMAKE_CXX_FLAGS_DEBUG "${ANDROID_CXX_FLAGS_DEBUG} ${CMAKE_CXX_FLAGS_DEBUG}" )
set( CMAKE_C_FLAGS_DEBUG "${ANDROID_CXX_FLAGS_DEBUG} ${CMAKE_C_FLAGS_DEBUG}" )
set( CMAKE_SHARED_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} ${CMAKE_SHARED_LINKER_FLAGS}" )
set( CMAKE_MODULE_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} ${CMAKE_MODULE_LINKER_FLAGS}" )
set( CMAKE_EXE_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS}" )
if( MIPS AND BUILD_WITH_ANDROID_NDK AND ANDROID_NDK_RELEASE STREQUAL "r8" )
set( CMAKE_SHARED_LINKER_FLAGS "-Wl,-T,${ANDROID_NDK}/toolchains/${ANDROID_GCC_TOOLCHAIN_NAME}/mipself.xsc ${CMAKE_SHARED_LINKER_FLAGS}" )
set( CMAKE_MODULE_LINKER_FLAGS "-Wl,-T,${ANDROID_NDK}/toolchains/${ANDROID_GCC_TOOLCHAIN_NAME}/mipself.xsc ${CMAKE_MODULE_LINKER_FLAGS}" )
set( CMAKE_EXE_LINKER_FLAGS "-Wl,-T,${ANDROID_NDK}/toolchains/${ANDROID_GCC_TOOLCHAIN_NAME}/mipself.x ${CMAKE_EXE_LINKER_FLAGS}" )
endif()
# configure rtti
if( DEFINED ANDROID_RTTI AND ANDROID_STL_FORCE_FEATURES )
if( ANDROID_RTTI )
set( CMAKE_CXX_FLAGS "-frtti ${CMAKE_CXX_FLAGS}" )
else()
set( CMAKE_CXX_FLAGS "-fno-rtti ${CMAKE_CXX_FLAGS}" )
endif()
endif()
# configure exceptios
if( DEFINED ANDROID_EXCEPTIONS AND ANDROID_STL_FORCE_FEATURES )
if( ANDROID_EXCEPTIONS )
set( CMAKE_CXX_FLAGS "-fexceptions ${CMAKE_CXX_FLAGS}" )
set( CMAKE_C_FLAGS "-fexceptions ${CMAKE_C_FLAGS}" )
else()
set( CMAKE_CXX_FLAGS "-fno-exceptions ${CMAKE_CXX_FLAGS}" )
set( CMAKE_C_FLAGS "-fno-exceptions ${CMAKE_C_FLAGS}" )
endif()
endif()
# global includes and link directories
include_directories( SYSTEM "${ANDROID_SYSROOT}/usr/include" ${ANDROID_STL_INCLUDE_DIRS} )
link_directories( "${CMAKE_INSTALL_PREFIX}/libs/${ANDROID_NDK_ABI_NAME}" )
# setup output directories
set( LIBRARY_OUTPUT_PATH_ROOT ${CMAKE_SOURCE_DIR} CACHE PATH "root for library output, set this to change where android libs are installed to" )
set( CMAKE_INSTALL_PREFIX "${ANDROID_TOOLCHAIN_ROOT}/user" CACHE STRING "path for installing" )
if(NOT _CMAKE_IN_TRY_COMPILE)
if( EXISTS "${CMAKE_SOURCE_DIR}/jni/CMakeLists.txt" )
set( EXECUTABLE_OUTPUT_PATH "${LIBRARY_OUTPUT_PATH_ROOT}/bin/${ANDROID_NDK_ABI_NAME}" CACHE PATH "Output directory for applications" )
else()
set( EXECUTABLE_OUTPUT_PATH "${LIBRARY_OUTPUT_PATH_ROOT}/bin" CACHE PATH "Output directory for applications" )
endif()
set( LIBRARY_OUTPUT_PATH "${LIBRARY_OUTPUT_PATH_ROOT}/libs/${ANDROID_NDK_ABI_NAME}" CACHE PATH "path for android libs" )
endif()
# set these global flags for cmake client scripts to change behavior
set( ANDROID True )
set( BUILD_ANDROID True )
# where is the target environment
set( CMAKE_FIND_ROOT_PATH "${ANDROID_TOOLCHAIN_ROOT}/bin" "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}" "${ANDROID_SYSROOT}" "${CMAKE_INSTALL_PREFIX}" "${CMAKE_INSTALL_PREFIX}/share" )
# only search for libraries and includes in the ndk toolchain
set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY )
set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )
# macro to find packages on the host OS
macro( find_host_package )
set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER )
set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY NEVER )
set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE NEVER )
if( CMAKE_HOST_WIN32 )
SET( WIN32 1 )
SET( UNIX )
elseif( CMAKE_HOST_APPLE )
SET( APPLE 1 )
SET( UNIX )
endif()
find_package( ${ARGN} )
SET( WIN32 )
SET( APPLE )
SET( UNIX 1 )
set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY )
set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )
endmacro()
# macro to find programs on the host OS
macro( find_host_program )
set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER )
set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY NEVER )
set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE NEVER )
if( CMAKE_HOST_WIN32 )
SET( WIN32 1 )
SET( UNIX )
elseif( CMAKE_HOST_APPLE )
SET( APPLE 1 )
SET( UNIX )
endif()
find_program( ${ARGN} )
SET( WIN32 )
SET( APPLE )
SET( UNIX 1 )
set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY )
set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )
endmacro()
macro( ANDROID_GET_ABI_RAWNAME TOOLCHAIN_FLAG VAR )
if( "${TOOLCHAIN_FLAG}" STREQUAL "ARMEABI" )
set( ${VAR} "armeabi" )
elseif( "${TOOLCHAIN_FLAG}" STREQUAL "ARMEABI_V7A" )
set( ${VAR} "armeabi-v7a" )
elseif( "${TOOLCHAIN_FLAG}" STREQUAL "X86" )
set( ${VAR} "x86" )
elseif( "${TOOLCHAIN_FLAG}" STREQUAL "MIPS" )
set( ${VAR} "mips" )
else()
set( ${VAR} "unknown" )
endif()
endmacro()
# export toolchain settings for the try_compile() command
if( NOT PROJECT_NAME STREQUAL "CMAKE_TRY_COMPILE" )
set( __toolchain_config "")
foreach( __var NDK_CCACHE LIBRARY_OUTPUT_PATH_ROOT ANDROID_FORBID_SYGWIN ANDROID_SET_OBSOLETE_VARIABLES
ANDROID_NDK
ANDROID_STANDALONE_TOOLCHAIN
ANDROID_TOOLCHAIN_NAME
ANDROID_ABI
ANDROID_NATIVE_API_LEVEL
ANDROID_STL
ANDROID_STL_FORCE_FEATURES
ANDROID_FORCE_ARM_BUILD
ANDROID_NO_UNDEFINED
ANDROID_SO_UNDEFINED
ANDROID_FUNCTION_LEVEL_LINKING
ANDROID_GOLD_LINKER
ANDROID_NOEXECSTACK
ANDROID_RELRO
)
if( DEFINED ${__var} )
if( "${__var}" MATCHES " ")
set( __toolchain_config "${__toolchain_config}set( ${__var} \"${${__var}}\" CACHE INTERNAL \"\" )\n" )
else()
set( __toolchain_config "${__toolchain_config}set( ${__var} ${${__var}} CACHE INTERNAL \"\" )\n" )
endif()
endif()
endforeach()
file( WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/android.toolchain.config.cmake" "${__toolchain_config}" )
unset( __toolchain_config )
endif()
# set some obsolete variables for backward compatibility
set( ANDROID_SET_OBSOLETE_VARIABLES ON CACHE BOOL "Define obsolete Andrid-specific cmake variables" )
mark_as_advanced( ANDROID_SET_OBSOLETE_VARIABLES )
if( ANDROID_SET_OBSOLETE_VARIABLES )
set( ANDROID_API_LEVEL ${ANDROID_NATIVE_API_LEVEL} )
set( ARM_TARGET "${ANDROID_ABI}" )
set( ARMEABI_NDK_NAME "${ANDROID_NDK_ABI_NAME}" )
endif()
# Variables controlling behavior or set by cmake toolchain:
# ANDROID_ABI : "armeabi-v7a" (default), "armeabi", "armeabi-v7a with NEON", "armeabi-v7a with VFPV3", "armeabi-v6 with VFP", "x86", "mips"
# ANDROID_NATIVE_API_LEVEL : 3,4,5,8,9,14 (depends on NDK version)
# ANDROID_STL : gnustl_static/gnustl_shared/stlport_static/stlport_shared/gabi++_static/gabi++_shared/system_re/system/none
# ANDROID_FORBID_SYGWIN : ON/OFF
# ANDROID_NO_UNDEFINED : ON/OFF
# ANDROID_SO_UNDEFINED : OFF/ON (default depends on NDK version)
# ANDROID_FUNCTION_LEVEL_LINKING : ON/OFF
# ANDROID_GOLD_LINKER : ON/OFF
# ANDROID_NOEXECSTACK : ON/OFF
# ANDROID_RELRO : ON/OFF
# ANDROID_FORCE_ARM_BUILD : ON/OFF
# ANDROID_STL_FORCE_FEATURES : ON/OFF
# ANDROID_SET_OBSOLETE_VARIABLES : ON/OFF
# Can be set only at the first run:
# ANDROID_NDK
# ANDROID_STANDALONE_TOOLCHAIN
# ANDROID_TOOLCHAIN_NAME : the NDK name of compiler toolchain
# LIBRARY_OUTPUT_PATH_ROOT : <any valid path>
# NDK_CCACHE : <path to your ccache executable>
# Obsolete:
# ANDROID_API_LEVEL : superseded by ANDROID_NATIVE_API_LEVEL
# ARM_TARGET : superseded by ANDROID_ABI
# ARM_TARGETS : superseded by ANDROID_ABI (can be set only)
# ANDROID_NDK_TOOLCHAIN_ROOT : superseded by ANDROID_STANDALONE_TOOLCHAIN (can be set only)
# ANDROID_USE_STLPORT : superseded by ANDROID_STL=stlport_static
# ANDROID_LEVEL : superseded by ANDROID_NATIVE_API_LEVEL (completely removed)
#
# Primary read-only variables:
# ANDROID : always TRUE
# ARMEABI : TRUE for arm v6 and older devices
# ARMEABI_V6 : TRUE for arm v6
# ARMEABI_V7A : TRUE for arm v7a
# NEON : TRUE if NEON unit is enabled
# VFPV3 : TRUE if VFP version 3 is enabled
# X86 : TRUE if configured for x86
# MIPS : TRUE if configured for mips
# BUILD_ANDROID : always TRUE
# BUILD_WITH_ANDROID_NDK : TRUE if NDK is used
# BUILD_WITH_STANDALONE_TOOLCHAIN : TRUE if standalone toolchain is used
# ANDROID_NDK_HOST_SYSTEM_NAME : "windows", "linux-x86" or "darwin-x86" depending on host platform
# ANDROID_NDK_ABI_NAME : "armeabi", "armeabi-v7a", "x86" or "mips" depending on ANDROID_ABI
# ANDROID_NDK_RELEASE : one of r5, r5b, r5c, r6, r6b, r7, r7b, r7c, r8, r8b, r8c; set only for NDK
# ANDROID_ARCH_NAME : "arm" or "x86" or "mips" depending on ANDROID_ABI
# ANDROID_SYSROOT : path to the compiler sysroot
# TOOL_OS_SUFFIX : "" or ".exe" depending on host platform
# ANDROID_COMPILER_IS_CLANG : TRUE if clang compiler is used
# Obsolete:
# ARMEABI_NDK_NAME : superseded by ANDROID_NDK_ABI_NAME
#
# Secondary (less stable) read-only variables:
# ANDROID_COMPILER_VERSION : GCC version used
# ANDROID_CXX_FLAGS : C/C++ compiler flags required by Android platform
# ANDROID_SUPPORTED_ABIS : list of currently allowed values for ANDROID_ABI
# ANDROID_TOOLCHAIN_MACHINE_NAME : "arm-linux-androideabi", "arm-eabi" or "i686-android-linux"
# ANDROID_TOOLCHAIN_ROOT : path to the top level of toolchain (standalone or placed inside NDK)
# ANDROID_CLANG_TOOLCHAIN_ROOT : path to clang tools
# ANDROID_SUPPORTED_NATIVE_API_LEVELS : list of native API levels found inside NDK
# ANDROID_STL_INCLUDE_DIRS : stl include paths
# ANDROID_RTTI : if rtti is enabled by the runtime
# ANDROID_EXCEPTIONS : if exceptions are enabled by the runtime
# ANDROID_GCC_TOOLCHAIN_NAME : read-only, differs from ANDROID_TOOLCHAIN_NAME only if clang is used
# ANDROID_CLANG_VERSION : version of clang compiler if clang is used
#
# Defaults:
# ANDROID_DEFAULT_NDK_API_LEVEL
# ANDROID_DEFAULT_NDK_API_LEVEL_${ARCH}
# ANDROID_NDK_SEARCH_PATHS
# ANDROID_STANDALONE_TOOLCHAIN_SEARCH_PATH
# ANDROID_SUPPORTED_ABIS_${ARCH}
# ANDROID_SUPPORTED_NDK_VERSIONS
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