AndroidToolchain.cmake 83.4 KB
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# Copyright (c) 2010-2011, Ethan Rublee
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# Copyright (c) 2011-2013, Andrey Kamaev
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# 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
#   - December 2012
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#     [+] suppress warning about unused CMAKE_TOOLCHAIN_FILE variable
#     [+] adjust API level to closest compatible as NDK does
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#     [~] fixed ccache full path search
#     [+] updated for NDK r8d
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#     [~] compiler options are aligned with NDK r8d
#   - March 2013
#     [+] updated for NDK r8e (x86 version)
#     [+] support x86_64 version of NDK
#   - April 2013
#     [+] support non-release NDK layouts (from Linaro git and Android git)
#     [~] automatically detect if explicit link to crtbegin_*.o is needed
#   - June 2013
#     [~] fixed stl include path for standalone toolchain made by NDK >= r8c
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# ------------------------------------------------------------------------------

cmake_minimum_required( VERSION 2.6.3 )

if( DEFINED CMAKE_CROSSCOMPILING )
 # subsequent toolchain loading is not really needed
 return()
endif()

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if( CMAKE_TOOLCHAIN_FILE )
 # touch toolchain variable only to suppress "unused variable" warning
endif()

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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 )

# Android SDK

if (NOT DEFINED ANDROID_SDK)
	set(ANDROID_SDK "$ENV{ANDROID_SDK}")
endif()

# rpath makes low sence for Android
set( CMAKE_SKIP_RPATH TRUE CACHE BOOL "If set, runtime paths are not added when using shared libraries." )

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set( ANDROID_SUPPORTED_NDK_VERSIONS ${ANDROID_EXTRA_NDK_VERSIONS} -r9 -r8e -r8d -r8c -r8b -r8 -r7c -r7b -r7 -r6b -r6 -r5c -r5b -r5 "" )
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if(NOT DEFINED ANDROID_NDK_SEARCH_PATHS)
 if( CMAKE_HOST_WIN32 )
  file( TO_CMAKE_PATH "$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()

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# detect current host platform
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if( NOT DEFINED ANDROID_NDK_HOST_X64 AND CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "amd64|x86_64|AMD64")
 set( ANDROID_NDK_HOST_X64 1 CACHE BOOL "Try to use 64-bit compiler toolchain" )
 mark_as_advanced( ANDROID_NDK_HOST_X64 )
endif()

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set( TOOL_OS_SUFFIX "" )
if( CMAKE_HOST_APPLE )
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 set( ANDROID_NDK_HOST_SYSTEM_NAME "darwin-x86_64" )
 set( ANDROID_NDK_HOST_SYSTEM_NAME2 "darwin-x86" )
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elseif( CMAKE_HOST_WIN32 )
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 set( ANDROID_NDK_HOST_SYSTEM_NAME "windows-x86_64" )
 set( ANDROID_NDK_HOST_SYSTEM_NAME2 "windows" )
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 set( TOOL_OS_SUFFIX ".exe" )
elseif( CMAKE_HOST_UNIX )
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 set( ANDROID_NDK_HOST_SYSTEM_NAME "linux-x86_64" )
 set( ANDROID_NDK_HOST_SYSTEM_NAME2 "linux-x86" )
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else()
 message( FATAL_ERROR "Cross-compilation on your platform is not supported by this cmake toolchain" )
endif()

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if( NOT ANDROID_NDK_HOST_X64 )
 set( ANDROID_NDK_HOST_SYSTEM_NAME ${ANDROID_NDK_HOST_SYSTEM_NAME2} )
endif()

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# 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 ${ANDROID_STANDALONE_TOOLCHAIN}" )
    message( STATUS "  If you prefer to use a different location, please define the variable: ANDROID_STANDALONE_TOOLCHAIN" )
   endif( ANDROID_STANDALONE_TOOLCHAIN )
  endif( ANDROID_NDK )
 endif( NOT ANDROID_STANDALONE_TOOLCHAIN )
endif( NOT ANDROID_NDK )
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# remember found paths
if( ANDROID_NDK )
 get_filename_component( ANDROID_NDK "${ANDROID_NDK}" ABSOLUTE )
 set( ANDROID_NDK "${ANDROID_NDK}" CACHE INTERNAL "Path of the Android NDK" FORCE )
 set( BUILD_WITH_ANDROID_NDK True )
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 if( EXISTS "${ANDROID_NDK}/RELEASE.TXT" )
  file( STRINGS "${ANDROID_NDK}/RELEASE.TXT" ANDROID_NDK_RELEASE_FULL LIMIT_COUNT 1 REGEX r[0-9]+[a-z]? )
  string( REGEX MATCH r[0-9]+[a-z]? ANDROID_NDK_RELEASE "${ANDROID_NDK_RELEASE_FULL}" )
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 else()
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  set( ANDROID_NDK_RELEASE "r1x" )
  set( ANDROID_NDK_RELEASE_FULL "unreleased" )
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 endif()
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()

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# android NDK layout
if( BUILD_WITH_ANDROID_NDK )
 if( NOT DEFINED ANDROID_NDK_LAYOUT )
  # try to automatically detect the layout
  if( EXISTS "${ANDROID_NDK}/RELEASE.TXT")
   set( ANDROID_NDK_LAYOUT "RELEASE" )
  elseif( EXISTS "${ANDROID_NDK}/../../linux-x86/toolchain/" )
   set( ANDROID_NDK_LAYOUT "LINARO" )
  elseif( EXISTS "${ANDROID_NDK}/../../gcc/" )
   set( ANDROID_NDK_LAYOUT "ANDROID" )
  endif()
 endif()
 set( ANDROID_NDK_LAYOUT "${ANDROID_NDK_LAYOUT}" CACHE STRING "The inner layout of NDK" )
 mark_as_advanced( ANDROID_NDK_LAYOUT )
 if( ANDROID_NDK_LAYOUT STREQUAL "LINARO" )
  set( ANDROID_NDK_HOST_SYSTEM_NAME ${ANDROID_NDK_HOST_SYSTEM_NAME2} ) # only 32-bit at the moment
  set( ANDROID_NDK_TOOLCHAINS_PATH "${ANDROID_NDK}/../../${ANDROID_NDK_HOST_SYSTEM_NAME}/toolchain" )
  set( ANDROID_NDK_TOOLCHAINS_SUBPATH  "" )
  set( ANDROID_NDK_TOOLCHAINS_SUBPATH2 "" )
 elseif( ANDROID_NDK_LAYOUT STREQUAL "ANDROID" )
  set( ANDROID_NDK_HOST_SYSTEM_NAME ${ANDROID_NDK_HOST_SYSTEM_NAME2} ) # only 32-bit at the moment
  set( ANDROID_NDK_TOOLCHAINS_PATH "${ANDROID_NDK}/../../gcc/${ANDROID_NDK_HOST_SYSTEM_NAME}/arm" )
  set( ANDROID_NDK_TOOLCHAINS_SUBPATH  "" )
  set( ANDROID_NDK_TOOLCHAINS_SUBPATH2 "" )
 else() # ANDROID_NDK_LAYOUT STREQUAL "RELEASE"
  set( ANDROID_NDK_TOOLCHAINS_PATH "${ANDROID_NDK}/toolchains" )
  set( ANDROID_NDK_TOOLCHAINS_SUBPATH  "/prebuilt/${ANDROID_NDK_HOST_SYSTEM_NAME}" )
  set( ANDROID_NDK_TOOLCHAINS_SUBPATH2 "/prebuilt/${ANDROID_NDK_HOST_SYSTEM_NAME2}" )
 endif()
 get_filename_component( ANDROID_NDK_TOOLCHAINS_PATH "${ANDROID_NDK_TOOLCHAINS_PATH}" ABSOLUTE )

 # try to detect change of NDK
 if( CMAKE_AR )
  string( LENGTH "${ANDROID_NDK_TOOLCHAINS_PATH}" __length )
  string( SUBSTRING "${CMAKE_AR}" 0 ${__length} __androidNdkPreviousPath )
  if( NOT __androidNdkPreviousPath STREQUAL ANDROID_NDK_TOOLCHAINS_PATH )
   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()
endif()


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# 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()

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macro( __GLOB_NDK_TOOLCHAINS __availableToolchainsVar __availableToolchainsLst __toolchain_subpath )
 foreach( __toolchain ${${__availableToolchainsLst}} )
  if( "${__toolchain}" MATCHES "-clang3[.][0-9]$" AND NOT EXISTS "${ANDROID_NDK_TOOLCHAINS_PATH}/${__toolchain}${__toolchain_subpath}" )
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   string( REGEX REPLACE "-clang3[.][0-9]$" "-4.6" __gcc_toolchain "${__toolchain}" )
  else()
   set( __gcc_toolchain "${__toolchain}" )
  endif()
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  __DETECT_TOOLCHAIN_MACHINE_NAME( __machine "${ANDROID_NDK_TOOLCHAINS_PATH}/${__gcc_toolchain}${__toolchain_subpath}" )
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  if( __machine )
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   string( REGEX MATCH "[0-9]+[.][0-9]+([.][0-9x]+)?$" __version "${__gcc_toolchain}" )
   if( __machine MATCHES i686 )
    set( __arch "x86" )
   elseif( __machine MATCHES arm )
    set( __arch "arm" )
   elseif( __machine MATCHES mipsel )
    set( __arch "mipsel" )
   endif()
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   list( APPEND __availableToolchainMachines "${__machine}" )
   list( APPEND __availableToolchainArchs "${__arch}" )
   list( APPEND __availableToolchainCompilerVersions "${__version}" )
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   list( APPEND ${__availableToolchainsVar} "${__toolchain}" )
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  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 "${ANDROID_SUPPORTED_NATIVE_API_LEVELS}" )
 set( __availableToolchains "" )
 set( __availableToolchainMachines "" )
 set( __availableToolchainArchs "" )
 set( __availableToolchainCompilerVersions "" )
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 if( ANDROID_TOOLCHAIN_NAME AND EXISTS "${ANDROID_NDK_TOOLCHAINS_PATH}/${ANDROID_TOOLCHAIN_NAME}/" )
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  # do not go through all toolchains if we know the name
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  set( __availableToolchainsLst "${ANDROID_TOOLCHAIN_NAME}" )
  __GLOB_NDK_TOOLCHAINS( __availableToolchains __availableToolchainsLst "${ANDROID_NDK_TOOLCHAINS_SUBPATH}" )
  if( NOT __availableToolchains AND NOT ANDROID_NDK_TOOLCHAINS_SUBPATH STREQUAL ANDROID_NDK_TOOLCHAINS_SUBPATH2 )
   __GLOB_NDK_TOOLCHAINS( __availableToolchains __availableToolchainsLst "${ANDROID_NDK_TOOLCHAINS_SUBPATH2}" )
   if( __availableToolchains )
    set( ANDROID_NDK_TOOLCHAINS_SUBPATH ${ANDROID_NDK_TOOLCHAINS_SUBPATH2} )
   endif()
  endif()
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 endif()
 if( NOT __availableToolchains )
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  file( GLOB __availableToolchainsLst RELATIVE "${ANDROID_NDK_TOOLCHAINS_PATH}" "${ANDROID_NDK_TOOLCHAINS_PATH}/*" )
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  if( __availableToolchains )
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   list(SORT __availableToolchainsLst) # we need clang to go after gcc
  endif()
  __LIST_FILTER( __availableToolchainsLst "^[.]" )
  __LIST_FILTER( __availableToolchainsLst "llvm" )
  __GLOB_NDK_TOOLCHAINS( __availableToolchains __availableToolchainsLst "${ANDROID_NDK_TOOLCHAINS_SUBPATH}" )
  if( NOT __availableToolchains AND NOT ANDROID_NDK_TOOLCHAINS_SUBPATH STREQUAL ANDROID_NDK_TOOLCHAINS_SUBPATH2 )
   __GLOB_NDK_TOOLCHAINS( __availableToolchains __availableToolchainsLst "${ANDROID_NDK_TOOLCHAINS_SUBPATH2}" )
   if( __availableToolchains )
    set( ANDROID_NDK_TOOLCHAINS_SUBPATH ${ANDROID_NDK_TOOLCHAINS_SUBPATH2} )
   endif()
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  endif()
 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} )
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 list( APPEND ANDROID_SUPPORTED_ABIS ${ANDROID_SUPPORTED_ABIS_${__arch}} )
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endforeach()
unset( __uniqToolchainArchNames )
if( NOT ANDROID_SUPPORTED_ABIS )
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 message( FATAL_ERROR "No one of known Android ABIs is supported by this cmake toolchain." )
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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 ${__idx} __toolchainVersion )
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   string( REPLACE "x" "99" __toolchainVersion "${__toolchainVersion}")
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   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}" )
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# adjust API level
set( __real_api_level ${ANDROID_DEFAULT_NDK_API_LEVEL_${ANDROID_ARCH_NAME}} )
foreach( __level ${ANDROID_SUPPORTED_NATIVE_API_LEVELS} )
 if( NOT __level GREATER ANDROID_NATIVE_API_LEVEL AND NOT __level LESS __real_api_level )
  set( __real_api_level ${__level} )
 endif()
endforeach()
if( __real_api_level AND NOT ANDROID_NATIVE_API_LEVEL EQUAL __real_api_level )
 message( STATUS "Adjusting Android API level 'android-${ANDROID_NATIVE_API_LEVEL}' to 'android-${__real_api_level}'")
 set( ANDROID_NATIVE_API_LEVEL ${__real_api_level} )
endif()
unset(__real_api_level)
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# validate
list( FIND ANDROID_SUPPORTED_NATIVE_API_LEVELS "${ANDROID_NATIVE_API_LEVEL}" __levelIdx )
if( __levelIdx EQUAL -1 )
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 message( SEND_ERROR "Specified Android native API level 'android-${ANDROID_NATIVE_API_LEVEL}' is not supported by your NDK/toolchain." )
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else()
 if( BUILD_WITH_ANDROID_NDK )
  __DETECT_NATIVE_API_LEVEL( __realApiLevel "${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" )
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  set( ANDROID_STL_INCLUDE_DIRS "${ANDROID_STANDALONE_TOOLCHAIN}/include/c++/${ANDROID_COMPILER_VERSION}" )
  if( NOT EXISTS "${ANDROID_STL_INCLUDE_DIRS}" )
   # old location ( pre r8c )
   set( ANDROID_STL_INCLUDE_DIRS "${ANDROID_STANDALONE_TOOLCHAIN}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}" )
  endif()
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  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 "${ANDROID_TOOLCHAIN_NAME}" )
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 if( NOT EXISTS "${ANDROID_NDK_TOOLCHAINS_PATH}/llvm-${ANDROID_CLANG_VERSION}${ANDROID_NDK_TOOLCHAINS_SUBPATH}/bin/clang${TOOL_OS_SUFFIX}" )
  message( FATAL_ERROR "Could not find the Clang compiler driver" )
1038 1039
 endif()
 set( ANDROID_COMPILER_IS_CLANG 1 )
1040
 set( ANDROID_CLANG_TOOLCHAIN_ROOT "${ANDROID_NDK_TOOLCHAINS_PATH}/llvm-${ANDROID_CLANG_VERSION}${ANDROID_NDK_TOOLCHAINS_SUBPATH}" )
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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 )
1054
 set( ANDROID_TOOLCHAIN_ROOT "${ANDROID_NDK_TOOLCHAINS_PATH}/${ANDROID_GCC_TOOLCHAIN_NAME}${ANDROID_NDK_TOOLCHAINS_SUBPATH}" )
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 set( ANDROID_SYSROOT "${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/${ANDROID_NDK_ABI_NAME}/libgabi++_static.a" )
 elseif( ANDROID_STL MATCHES "stlport" )
  if( NOT ANDROID_NDK_RELEASE STRLESS "r8d" )
   set( ANDROID_EXCEPTIONS       ON )
  else()
   set( ANDROID_EXCEPTIONS       OFF )
  endif()
  if( ANDROID_NDK_RELEASE STRLESS "r7" )
   set( ANDROID_RTTI            OFF )
  else()
   set( ANDROID_RTTI            ON )
  endif()
  set( ANDROID_STL_INCLUDE_DIRS "${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}" )
   if( ARMEABI_V7A AND ANDROID_COMPILER_VERSION VERSION_EQUAL "4.7" AND ANDROID_NDK_RELEASE STREQUAL "r8d" )
    # gnustl binary for 4.7 compiler is buggy :(
    # TODO: look for right fix
    set( __libstl                "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/4.6" )
   else()
    set( __libstl                "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/${ANDROID_COMPILER_VERSION}" )
   endif()
  else()
   set( __libstl                "${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: ${ANDROID_STL}" )
 endif()
 # find libsupc++.a - rtti & exceptions
 if( ANDROID_STL STREQUAL "system_re" OR ANDROID_STL MATCHES "gnustl" )
1113 1114 1115 1116 1117
  set( __libsupcxx "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/${ANDROID_COMPILER_VERSION}/libs/${ANDROID_NDK_ABI_NAME}/libsupc++.a" ) # r8b or newer
  if( NOT EXISTS "${__libsupcxx}" )
   set( __libsupcxx "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/libs/${ANDROID_NDK_ABI_NAME}/libsupc++.a" ) # r7-r8
  endif()
  if( NOT EXISTS "${__libsupcxx}" ) # before r7
1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166
   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 )
 if( DEFINED NDK_CCACHE AND NOT EXISTS NDK_CCACHE )
  unset( NDK_CCACHE CACHE )
 endif()
 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 )
1167
 if( NDK_CCACHE AND NOT ANDROID_SYSROOT MATCHES "[ ;\"]" )
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  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 )

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if( ANDROID_SYSROOT MATCHES "[ ;\"]" )
 if( CMAKE_HOST_WIN32 )
  # try to convert path to 8.3 form
  file( WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/cvt83.cmd" "@echo %~s1" )
  execute_process( COMMAND "$ENV{ComSpec}" /c "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/cvt83.cmd" "${ANDROID_SYSROOT}"
                   OUTPUT_VARIABLE __path OUTPUT_STRIP_TRAILING_WHITESPACE
                   RESULT_VARIABLE __result ERROR_QUIET )
  if( __result EQUAL 0 )
   file( TO_CMAKE_PATH "${__path}" ANDROID_SYSROOT )
   set( ANDROID_CXX_FLAGS "--sysroot=${ANDROID_SYSROOT}" )
  else()
   set( ANDROID_CXX_FLAGS "--sysroot=\"${ANDROID_SYSROOT}\"" )
  endif()
 else()
  set( ANDROID_CXX_FLAGS "'--sysroot=${ANDROID_SYSROOT}'" )
 endif()
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 if( NOT _CMAKE_IN_TRY_COMPILE )
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  # quotes can break try_compile and compiler identification
  message(WARNING "Path to your Android NDK (or toolchain) has non-alphanumeric symbols.\nThe build might be broken.\n")
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 endif()
else()
 set( ANDROID_CXX_FLAGS "--sysroot=${ANDROID_SYSROOT}" )
endif()

# NDK flags
if( ARMEABI OR ARMEABI_V7A )
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 set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -fpic -funwind-tables" )
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 if( NOT ANDROID_FORCE_ARM_BUILD AND NOT ARMEABI_V6 )
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  set( ANDROID_CXX_FLAGS_RELEASE "-mthumb -fomit-frame-pointer -fno-strict-aliasing" )
  set( ANDROID_CXX_FLAGS_DEBUG   "-marm -fno-omit-frame-pointer -fno-strict-aliasing" )
  if( NOT ANDROID_COMPILER_IS_CLANG )
   set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -finline-limit=64" )
  endif()
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 else()
  # always compile ARMEABI_V6 in arm mode; otherwise there is no difference from ARMEABI
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  set( ANDROID_CXX_FLAGS_RELEASE "-marm -fomit-frame-pointer -fstrict-aliasing" )
  set( ANDROID_CXX_FLAGS_DEBUG   "-marm -fno-omit-frame-pointer -fno-strict-aliasing" )
  if( NOT ANDROID_COMPILER_IS_CLANG )
   set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -funswitch-loops -finline-limit=300" )
  endif()
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 endif()
elseif( X86 )
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 set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -funwind-tables" )
 if( NOT ANDROID_COMPILER_IS_CLANG )
  set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -funswitch-loops -finline-limit=300" )
 else()
  set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -fPIC" )
 endif()
 set( ANDROID_CXX_FLAGS_RELEASE "-fomit-frame-pointer -fstrict-aliasing" )
 set( ANDROID_CXX_FLAGS_DEBUG   "-fno-omit-frame-pointer -fno-strict-aliasing" )
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elseif( MIPS )
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 set( ANDROID_CXX_FLAGS         "${ANDROID_CXX_FLAGS} -fpic -fno-strict-aliasing -finline-functions -ffunction-sections -funwind-tables -fmessage-length=0" )
 set( ANDROID_CXX_FLAGS_RELEASE "-fomit-frame-pointer" )
 set( ANDROID_CXX_FLAGS_DEBUG   "-fno-omit-frame-pointer" )
 if( NOT ANDROID_COMPILER_IS_CLANG )
  set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -fno-inline-functions-called-once -fgcse-after-reload -frerun-cse-after-loop -frename-registers" )
  set( ANDROID_CXX_FLAGS_RELEASE "${ANDROID_CXX_FLAGS_RELEASE} -funswitch-loops -finline-limit=300" )
 endif()
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elseif()
 set( ANDROID_CXX_FLAGS_RELEASE "" )
 set( ANDROID_CXX_FLAGS_DEBUG   "" )
endif()

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set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -fsigned-char" ) # good/necessary when porting desktop libraries

if( NOT X86 AND NOT ANDROID_COMPILER_IS_CLANG )
 set( ANDROID_CXX_FLAGS "-Wno-psabi ${ANDROID_CXX_FLAGS}" )
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endif()

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if( NOT ANDROID_COMPILER_VERSION VERSION_LESS "4.6" )
 set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -no-canonical-prefixes" ) # see https://android-review.googlesource.com/#/c/47564/
endif()
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# ABI-specific flags
if( ARMEABI_V7A )
 set( ANDROID_CXX_FLAGS "${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()

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if( ANDROID_STL MATCHES "gnustl" AND (EXISTS "${__libstl}" OR EXISTS "${__libsupcxx}") )
 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()

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# STL
if( EXISTS "${__libstl}" OR EXISTS "${__libsupcxx}" )
 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" )
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  if( NOT EXISTS "${ANDROID_LIBM_PATH}" )
   set( ANDROID_LIBM_PATH -lm )
  endif()
  set( CMAKE_CXX_CREATE_SHARED_LIBRARY "${CMAKE_CXX_CREATE_SHARED_LIBRARY} ${ANDROID_LIBM_PATH}" )
  set( CMAKE_CXX_CREATE_SHARED_MODULE  "${CMAKE_CXX_CREATE_SHARED_MODULE} ${ANDROID_LIBM_PATH}" )
  set( CMAKE_CXX_LINK_EXECUTABLE       "${CMAKE_CXX_LINK_EXECUTABLE} ${ANDROID_LIBM_PATH}" )
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 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 )
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 if( MIPS )
  # there is some sysroot-related problem in mips linker...
  if( NOT ANDROID_SYSROOT MATCHES "[ ;\"]" )
   set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -Wl,--no-undefined -Wl,-rpath-link,${ANDROID_SYSROOT}/usr/lib" )
  endif()
 else()
  set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -Wl,--no-undefined" )
 endif()
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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 "${ANDROID_LINKER_FLAGS} -fuse-ld=gold" )
 elseif( ANDROID_NDK_RELEASE STRGREATER "r8b")
  set( ANDROID_LINKER_FLAGS "${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 )
  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" )

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# put flags to cache (for debug purpose only)
set( ANDROID_CXX_FLAGS         "${ANDROID_CXX_FLAGS}"         CACHE INTERNAL "Android specific c/c++ flags" )
set( ANDROID_CXX_FLAGS_RELEASE "${ANDROID_CXX_FLAGS_RELEASE}" CACHE INTERNAL "Android specific c/c++ Release flags" )
set( ANDROID_CXX_FLAGS_DEBUG   "${ANDROID_CXX_FLAGS_DEBUG}"   CACHE INTERNAL "Android specific c/c++ Debug flags" )
set( ANDROID_LINKER_FLAGS      "${ANDROID_LINKER_FLAGS}"      CACHE INTERNAL "Android specific c/c++ linker flags" )

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# 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" )
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 set( CMAKE_SHARED_LINKER_FLAGS "-Wl,-T,${ANDROID_NDK_TOOLCHAINS_PATH}/${ANDROID_GCC_TOOLCHAIN_NAME}/mipself.xsc ${CMAKE_SHARED_LINKER_FLAGS}" )
 set( CMAKE_MODULE_LINKER_FLAGS "-Wl,-T,${ANDROID_NDK_TOOLCHAINS_PATH}/${ANDROID_GCC_TOOLCHAIN_NAME}/mipself.xsc ${CMAKE_MODULE_LINKER_FLAGS}" )
 set( CMAKE_EXE_LINKER_FLAGS    "-Wl,-T,${ANDROID_NDK_TOOLCHAINS_PATH}/${ANDROID_GCC_TOOLCHAIN_NAME}/mipself.x ${CMAKE_EXE_LINKER_FLAGS}" )
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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}" )

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# detect if need link crtbegin_so.o explicitly
if( NOT DEFINED ANDROID_EXPLICIT_CRT_LINK )
 set( __cmd "${CMAKE_CXX_CREATE_SHARED_LIBRARY}" )
 string( REPLACE "<CMAKE_CXX_COMPILER>" "${CMAKE_CXX_COMPILER} ${CMAKE_CXX_COMPILER_ARG1}" __cmd "${__cmd}" )
 string( REPLACE "<CMAKE_C_COMPILER>"   "${CMAKE_C_COMPILER} ${CMAKE_C_COMPILER_ARG1}"   __cmd "${__cmd}" )
 string( REPLACE "<CMAKE_SHARED_LIBRARY_CXX_FLAGS>" "${CMAKE_CXX_FLAGS}" __cmd "${__cmd}" )
 string( REPLACE "<LANGUAGE_COMPILE_FLAGS>" "" __cmd "${__cmd}" )
 string( REPLACE "<LINK_FLAGS>" "${CMAKE_SHARED_LINKER_FLAGS}" __cmd "${__cmd}" )
 string( REPLACE "<CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS>" "-shared" __cmd "${__cmd}" )
 string( REPLACE "<CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG>" "" __cmd "${__cmd}" )
 string( REPLACE "<TARGET_SONAME>" "" __cmd "${__cmd}" )
 string( REPLACE "<TARGET>" "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/toolchain_crtlink_test.so" __cmd "${__cmd}" )
 string( REPLACE "<OBJECTS>" "\"${ANDROID_SYSROOT}/usr/lib/crtbegin_so.o\"" __cmd "${__cmd}" )
 string( REPLACE "<LINK_LIBRARIES>" "" __cmd "${__cmd}" )
 separate_arguments( __cmd )
 foreach( __var ANDROID_NDK ANDROID_NDK_TOOLCHAINS_PATH ANDROID_STANDALONE_TOOLCHAIN )
  if( ${__var} )
   set( __tmp "${${__var}}" )
   separate_arguments( __tmp )
   string( REPLACE "${__tmp}" "${${__var}}" __cmd "${__cmd}")
  endif()
 endforeach()
 string( REPLACE "'" "" __cmd "${__cmd}" )
 string( REPLACE "\"" "" __cmd "${__cmd}" )
 execute_process( COMMAND ${__cmd} RESULT_VARIABLE __cmd_result OUTPUT_QUIET ERROR_QUIET )
 if( __cmd_result EQUAL 0 )
  set( ANDROID_EXPLICIT_CRT_LINK ON )
 else()
  set( ANDROID_EXPLICIT_CRT_LINK OFF )
 endif()
endif()

if( ANDROID_EXPLICIT_CRT_LINK )
 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()

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# 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
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                ANDROID_NDK_HOST_X64
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                ANDROID_NDK
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                ANDROID_NDK_LAYOUT
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                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
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                ANDROID_LIBM_PATH
                ANDROID_EXPLICIT_CRT_LINK
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                )
  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
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#   ANDROID_NDK_HOST_X64 : try to use x86_64 toolchain (default for x64 host systems)
#   ANDROID_NDK_LAYOUT : the inner NDK structure (RELEASE, LINARO, ANDROID)
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#   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
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#   ANDROID_NDK_HOST_SYSTEM_NAME : "windows", "linux-x86" or "darwin-x86" depending on host platform
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#   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, r8d, r8e; 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
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#   ANDROID_LIBM_PATH : path to libm.so (set to something like $(TOP)/out/target/product/<product_name>/obj/lib/libm.so) to workaround unresolved `sincos`
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#
# Defaults:
#   ANDROID_DEFAULT_NDK_API_LEVEL
#   ANDROID_DEFAULT_NDK_API_LEVEL_${ARCH}
#   ANDROID_NDK_SEARCH_PATHS
#   ANDROID_STANDALONE_TOOLCHAIN_SEARCH_PATH
#   ANDROID_SUPPORTED_ABIS_${ARCH}
#   ANDROID_SUPPORTED_NDK_VERSIONS