Update android.toolchain.cmake to latest from android-cmake project.

1 files changed, 864 insertions, 249 deletions

diff --git a/cmake/toolchain/android.toolchain.cmake b/cmake/toolchain/android.toolchain.cmake
index 640f469c..2f534164 100644
--- a/cmake/toolchain/android.toolchain.cmake
+++ b/cmake/toolchain/android.toolchain.cmake
@@ -1,370 +1,891 @@
-# ----------------------------------------------------------------------------
-#  Android CMake toolchain file, for use with the ndk r5,r6
+# ------------------------------------------------------------------------------
+#  Android CMake toolchain file, for use with the Android NDK r5-r7
+#  Requires cmake 2.6.3 or newer (2.8.3 or newer is recommended).
 #  See home page: http://code.google.com/p/android-cmake/
 #
+#  The file is mantained by the OpenCV project. And also can be found at
+#  http://code.opencv.org/svn/opencv/trunk/opencv/android/android.toolchain.cmake
+#
 #  Usage Linux:
-#   $ export ANDROID_NDK=/<absolute path to NDK>
-#   $ cmake -DCMAKE_TOOLCHAIN_FILE=<path to this file>/android.toolchain.cmake ..
-#   $ make
+#   $ 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_NDK_TOOLCHAIN_ROOT=/<absolute path to standalone toolchain>
-#   $ cmake -DCMAKE_TOOLCHAIN_FILE=<path to this file>/android.toolchain.cmake ..
-#   $ make
+#   $ 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.
-#     For example this one: http://gnuwin32.sourceforge.net/packages/make.htm
+#     Android NDK r7 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" ..
+#   $ "%ANDROID_NDK%\prebuilt\windows\bin\make.exe"
 #
-#   $ SET ANDROID_NDK=C:\<absolute path to NDK>\android-ndk-r6
-#   $ cmake.exe -G"Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE=<path to this file>\android.toolchain.cmake -DCMAKE_MAKE_PROGRAM=C:\<absolute path to make>\make.exe ..
-#   $ C:\<absolute path to make>\make.exe
 #
+#  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.
 #
-#  Toolchain options (can be set as cmake parameters: -D<option_name>=<value>):
-#    ANDROID_NDK=/opt/android-ndk-r6 - path to NDK root.
-#      Can be set as environment variable.
+#    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_NDK_TOOLCHAIN_ROOT=/opt/android-toolchain - path to standalone toolchain.
-#      Option is not used if full NDK is found. Can be set as environment variable.
+#    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 values 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 ${ANDROID_NDK}/docs/CPU-ARCH-ABIS.html for the documentation.
 #
-#    ANDROID_API_LEVEL=android-8 - level of android API to use.
-#      Option is ignored when build uses stanalone toolchain.
+#    ANDROID_NATIVE_API_LEVEL=android-8 - level of Android API compile for.
+#      Option is read-only when standalone toolchain used.
 #
-#    ARM_TARGET=armeabi-v7a - type of floating point support.
-#      Other possible values are: "armeabi", "armeabi-v7a with NEON", "armeabi-v7a with VFPV3"
+#    ANDROID_FORCE_ARM_BUILD=OFF - set true to generate 32-bit ARM instructions
+#      instead of Thumb-1. Is not available for "x86" (inapplicable) and
+#      "armeabi-v6 with VFP" (forced) ABIs.
 #
-#    FORCE_ARM=false - set true to generate 32-bit ARM instructions instead of Thumb-1.
+#    ANDROID_NO_UNDEFINED=ON - set true to show all undefined symbols as linker
+#      errors even if they are not used.
 #
-#    NO_UNDEFINED=true - set true to show all undefined symbols will as linker errors even if they are not used.
+#    ANDROID_SO_UNDEFINED=OFF - set true to allow undefined symbols in shared
+#      libraries. Automatically turned on for NDK r5x and r6x due to GLESv2
+#      problems.
 #
+#    LIBRARY_OUTPUT_PATH_ROOT=${CMAKE_SOURCE_DIR} - where to output binary
+#      files. See additional details below.
 #
-#  Toolcahin will search for NDK/toolchain in following order:
-#    ANDROID_NDK - cmake parameter
-#    ANDROID_NDK - environment variable
-#    ANDROID_NDK - default location
-#    ANDROID_NDK_TOOLCHAIN_ROOT - cmake parameter
-#    ANDROID_NDK_TOOLCHAIN_ROOT - environment variable
-#    ANDROID_NDK_TOOLCHAIN_ROOT - default location
+#    ANDROID_SET_OBSOLETE_VARIABLES=ON - it set, then toolchain defines some
+#      obsolete variables which were set by previous versions of this file for
+#      backward compatibility.
 #
 #
 #  What?:
-#     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}  ${my_cxx_flags}")
-#       The flags will be prepopulated with critical flags, so don't loose them.
+#    android-cmake toolchain searches for NDK/toolchain in the following order:
+#      ANDROID_NDK - cmake parameter
+#      ANDROID_NDK - environment variable
+#      ANDROID_STANDALONE_TOOLCHAIN - cmake parameter
+#      ANDROID_STANDALONE_TOOLCHAIN - environment variable
+#      ANDROID_NDK - default locations
+#      ANDROID_STANDALONE_TOOLCHAIN - default locations
+#
+#    Make sure to do the following in your scripts:
+#      SET( CMAKE_CXX_FLAGS "${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 these 
-#     variables to make necessary changes.
+#    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 and ARMEABI_V7A will be set true, mutually exclusive. V7A is
-#     for floating point. NEON option will be set true if fpu is set to neon.
+#    Also ARMEABI or ARMEABI_V7A or X86 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 ${LIBRARY_OUTPUT_PATH_ROOT}/libs/armeabi* depending on target.
-#        this will be convenient for android linking
+#    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.
 #
-#     Base system is Linux, but you may need to change things 
-#     for android compatibility.
-#   
 #
+#  Change Log:
 #   - initial version December 2010 Ethan Rublee ethan.ruble@gmail.com
 #   - modified April 2011 Andrey Kamaev andrey.kamaev@itseez.com
 #     [+] added possibility to build with NDK (without standalone toolchain)
-#     [+] support croos compilation on Windows (native, no cygwin support)
+#     [+] 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
-#   - modified April 2011 Andrey Kamaev andrey.kamaev@itseez.com
 #     [+] 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
 #   - modified May 2011 Andrey Kamaev andrey.kamaev@itseez.com
 #     [~] 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 first cmake pass
+#     [~] added guard to prevent changing of output directories on the first
+#         cmake pass
 #     [~] toolchain exits with error if ARM_TARGET is not recognized
 #   - modified June 2011 Andrey Kamaev andrey.kamaev@itseez.com
 #     [~] 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 host system
+#     [+] added macro find_host_package, find_host_program to search
+#         packages/programs on the host system
 #     [~] fixed path to STL library
 #   - modified July 2011 Andrey Kamaev andrey.kamaev@itseez.com
 #     [~] fixed options caching
 #     [~] search for all supported NDK versions
 #     [~] allowed spaces in NDK path
-# ----------------------------------------------------------------------------
+#   - modified September 2011 Andrey Kamaev andrey.kamaev@itseez.com
+#     [~] updated for NDK r6b
+#   - modified November 2011 Andrey Kamaev andrey.kamaev@itseez.com
+#     [*] 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
+#   - modified January 2012 Andrey Kamaev andrey.kamaev@itseez.com
+#     [+] 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
+#   - modified February 2012 Andrey Kamaev andrey.kamaev@itseez.com
+#     [+] updated for NDK r7b
+#     [~] fixed cmake try_compile() command
+#     [~] Fix for missing install_name_tool on OS X
+# ------------------------------------------------------------------------------
+
+cmake_minimum_required( VERSION 2.6.3 )
+
+if( PROJECT_NAME STREQUAL "CMAKE_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 )
 
-set( ANDROID_NDK_DEFAULT_SEARCH_PATH /opt/android-ndk )
-set( ANDROID_NDK_SUPPORTED_VERSIONS -r6 -r5c -r5b -r5 "")
-set( ANDROID_NDK_TOOLCHAIN_DEFAULT_SEARCH_PATH /opt/android-toolchain )
-set( TOOL_OS_SUFFIX "" )
+set( ANDROID_SUPPORTED_NDK_VERSIONS -r7b -r7 -r6b -r6 -r5c -r5b -r5 "" )
+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" "$ENV{SystemDrive}/NVPACK/android-ndk" )
+else()
+ set( ANDROID_NDK_SEARCH_PATHS /opt/android-ndk "$ENV{HOME}/NVPACK/android-ndk" )
+endif()
+set( ANDROID_STANDALONE_TOOLCHAIN_SEARCH_PATH /opt/android-toolchain )
+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" )
 
-macro( __TOOLCHAIN_DETECT_API_LEVEL _path )
- SET( _expected ${ARGV1} )
- if( NOT EXISTS ${_path} )
-  message( FATAL_ERROR "Could not verify Android API level. Probably you have specified invalid level value, or your copy of NDK/toolchain is broken." )
- endif()
- SET( API_LEVEL_REGEX "^[\t ]*#define[\t ]+__ANDROID_API__[\t ]+([0-9]+)[\t ]*$" )
- FILE( STRINGS ${_path} API_FILE_CONTENT REGEX "${API_LEVEL_REGEX}")
- if( NOT API_FILE_CONTENT )
-  message( FATAL_ERROR "Could not verify Android API level. Probably you have specified invalid level value, or your copy of NDK/toolchain is broken." )
- endif()
- string( REGEX REPLACE "${API_LEVEL_REGEX}" "\\1" ANDROID_LEVEL_FOUND "${API_FILE_CONTENT}" )
- if( DEFINED _expected )
-  if( NOT ${ANDROID_LEVEL_FOUND} EQUAL ${_expected} )
-   message( FATAL_ERROR "Specified Android API level does not match level found. Probably your copy of NDK/toolchain is broken." )
-  endif()
- endif()
- set( ANDROID_API_LEVEL ${ANDROID_LEVEL_FOUND} CACHE STRING "android API level" FORCE )
-endmacro()
+set( ANDROID_DEFAULT_NDK_API_LEVEL 8 )
+set( ANDROID_DEFAULT_NDK_API_LEVEL_x86 9 )
 
-if( NOT DEFINED ANDROID_NDK )
- set( ANDROID_NDK $ENV{ANDROID_NDK} )
-endif()
 
-if( NOT DEFINED ANDROID_NDK_TOOLCHAIN_ROOT )
- set( ANDROID_NDK_TOOLCHAIN_ROOT $ENV{ANDROID_NDK_TOOLCHAIN_ROOT} )
-endif()
+macro( __LIST_FILTER listvar regex )
+ if( ${listvar} )
+  foreach( __val ${${listvar}} )
+   if( __val MATCHES "${regex}" )
+    list( REMOVE_ITEM ${listvar} "${__val}" )
+   endif()
+  endforeach()
+ endif()
+endmacro()
 
-#set path for android NDK -- look
-if( NOT EXISTS "${ANDROID_NDK}" AND NOT DEFINED ANDROID_NDK_TOOLCHAIN_ROOT )
- foreach(ndk_version ${ANDROID_NDK_SUPPORTED_VERSIONS})
-  if( EXISTS ${ANDROID_NDK_DEFAULT_SEARCH_PATH}${ndk_version} )
-   set ( ANDROID_NDK ${ANDROID_NDK_DEFAULT_SEARCH_PATH}${ndk_version} )
-   message( STATUS "Using default path for android NDK ${ANDROID_NDK}" )
-   message( STATUS "  If you prefer to use a different location, please define the variable: ANDROID_NDK" )
+macro( __INIT_VARIABLE var_name )
+ set( __test_path 0 )
+ foreach( __var ${ARGN} )
+  if( __var STREQUAL "PATH" )
+   set( __test_path 1 )
    break()
   endif()
  endforeach()
-endif()
+ if( __test_path AND NOT EXISTS "${${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}" )
+       set( ${var_name} "${__value}" )
+       if( __obsolete )
+        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 )
+        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 )
+ endif()
+ unset( __test_path )
+endmacro()
 
-if( EXISTS "${ANDROID_NDK}" )
- set( ANDROID_NDK "${ANDROID_NDK}" CACHE PATH "root of the android ndk" FORCE )
- 
- if( APPLE )
-  set( NDKSYSTEM "darwin-x86" )
- elseif( WIN32 )
-  set( NDKSYSTEM "windows" )
-  set( TOOL_OS_SUFFIX ".exe" )
- elseif( UNIX )
-  set( NDKSYSTEM "linux-x86" )
+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 )
+ file( GLOB __gccExePath "${_root}/bin/*-gcc${TOOL_OS_SUFFIX}" )
+ __LIST_FILTER( __gccExePath "bin/[.].*-gcc${TOOL_OS_SUFFIX}$" )
+ list( LENGTH __gccExePath __gccExePathsCount )
+ if( NOT __gccExePathsCount EQUAL 1 )
+  message( WARNING "Could not uniquely determine machine name for compiler from ${_root}." )
+  set( ${_var} "" )
  else()
-  message( FATAL_ERROR "Your platform is not supported" )
+  get_filename_component( __gccExeName "${__gccExePath}" NAME_WE )
+  string( REPLACE "-gcc" "" ${_var} "${__gccExeName}" )
+ endif()
+ unset( __gccExePath )
+ unset( __gccExePathsCount )
+ unset( __gccExeName )
+endmacro()
+
+macro( __COPY_IF_DIFFERENT _source _destination )
+ execute_process( COMMAND "${CMAKE_COMMAND}" -E copy_if_different "${_source}" "${_destination}" RESULT_VARIABLE __fileCopyProcess )
+ if( NOT __fileCopyProcess EQUAL 0 OR NOT EXISTS "${_destination}")
+  message( SEND_ERROR "Failed copying of ${_source} to the ${_destination}" )
  endif()
+ unset( __fileCopyProcess )
+endmacro()
+
 
- set( ANDROID_API_LEVEL $ENV{ANDROID_API_LEVEL} )
- string( REGEX REPLACE "[\t ]*android-([0-9]+)[\t ]*" "\\1" ANDROID_API_LEVEL "${ANDROID_API_LEVEL}" )
- string( REGEX REPLACE "[\t ]*([0-9]+)[\t ]*" "\\1" ANDROID_API_LEVEL "${ANDROID_API_LEVEL}" )
+#stl version: by default gnustl_static will be used
+set( ANDROID_USE_STLPORT FALSE CACHE BOOL "Experimental: use stlport_static instead of gnustl_static")
+mark_as_advanced( ANDROID_USE_STLPORT )
 
- set( PossibleAndroidLevels "3;4;5;8;9" )
- set( ANDROID_API_LEVEL ${ANDROID_API_LEVEL} CACHE STRING "android API level" )
- set_property( CACHE ANDROID_API_LEVEL PROPERTY STRINGS ${PossibleAndroidLevels} )
- 
- if( NOT ANDROID_API_LEVEL GREATER 2 )
-  set( ANDROID_API_LEVEL 8)
-  message( STATUS "Using default android API level android-${ANDROID_API_LEVEL}" )
-  message( STATUS "  If you prefer to use a different API level, please define the variable: ANDROID_API_LEVEL" )
+#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()
 
- set( ANDROID_NDK_TOOLCHAIN_ROOT "${ANDROID_NDK}/toolchains/arm-linux-androideabi-4.4.3/prebuilt/${NDKSYSTEM}" )
- set( ANDROID_NDK_SYSROOT "${ANDROID_NDK}/platforms/android-${ANDROID_API_LEVEL}/arch-arm" )
- 
- __TOOLCHAIN_DETECT_API_LEVEL( "${ANDROID_NDK_SYSROOT}/usr/include/android/api-level.h" ${ANDROID_API_LEVEL} )
- 
- #message( STATUS "Using android NDK from ${ANDROID_NDK}" )
- set( BUILD_WITH_ANDROID_NDK True )
-else()
- #try to find toolchain
- if( NOT EXISTS "${ANDROID_NDK_TOOLCHAIN_ROOT}" )
-  set( ANDROID_NDK_TOOLCHAIN_ROOT "${ANDROID_NDK_TOOLCHAIN_DEFAULT_SEARCH_PATH}" )
-  message( STATUS "Using default path for toolchain ${ANDROID_NDK_TOOLCHAIN_ROOT}" )
-  message( STATUS "  If you prefer to use a different location, please define the variable: ANDROID_NDK_TOOLCHAIN_ROOT" )
+ if( CMAKE_HOST_WIN32 )
+  #remove cygwin from PATH
+  set( __new_path "$ENV{PATH}")
+  __LIST_FILTER( __new_path "cygwin" )
+  set(ENV{PATH} "${__new_path}")
+  unset(__new_path)
  endif()
+endif()
 
- set( ANDROID_NDK_TOOLCHAIN_ROOT "${ANDROID_NDK_TOOLCHAIN_ROOT}" CACHE PATH "root of the Android NDK standalone toolchain" FORCE )
- set( ANDROID_NDK_SYSROOT "${ANDROID_NDK_TOOLCHAIN_ROOT}/sysroot" )
+#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()
 
- if( NOT EXISTS "${ANDROID_NDK_TOOLCHAIN_ROOT}" )
-  message( FATAL_ERROR "neither ${ANDROID_NDK} nor ${ANDROID_NDK_TOOLCHAIN_ROOT} does not exist!
+#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 ${__length} __androidNdkPreviousPath )
+  if( NOT __androidNdkPreviousPath STREQUAL ANDROID_NDK )
+   message( FATAL_ERROR "It is not possible to change path to the NDK on subsequent run." )
+  endif()
+  unset( __androidNdkPreviousPath )
+  unset( __length )
+ endif()
+ set( ANDROID_NDK "${ANDROID_NDK}" CACHE INTERNAL "Path of the Android NDK" )
+ set( BUILD_WITH_ANDROID_NDK True )
+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" )
+ 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 toolcahin.
     You should either set an environment variable:
       export ANDROID_NDK=~/my-android-ndk
     or
-      export ANDROID_NDK_TOOLCHAIN_ROOT=~/my-android-toolchain
+      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_DEFAULT_SEARCH_PATH}
-      sudo ln -s ~/my-android-toolchain ${ANDROID_NDK_TOOLCHAIN_DEFAULT_SEARCH_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( __availableToolchains "standalone" )
+ __DETECT_TOOLCHAIN_MACHINE_NAME( __availableToolchainMachines "${ANDROID_STANDALONE_TOOLCHAIN}" )
+ if( NOT __availableToolchainMachines )
+  message( FATAL_ERROR "Could not determine machine name of your toolchain. Probably your Android standalone toolchain is broken." )
+ endif()
+ if( __availableToolchainMachines MATCHES i686 )
+  set( __availableToolchainArchs "x86" )
+ elseif( __availableToolchainMachines MATCHES arm )
+  set( __availableToolchainArchs "arm" )
+ endif()
+ if( ANDROID_COMPILER_VERSION )
+  #do not run gcc every time because it is relatevely expencive
+  set( __availableToolchainCompilerVersions "${ANDROID_COMPILER_VERSION}" )
+ else()
+  execute_process( COMMAND "${ANDROID_STANDALONE_TOOLCHAIN}/bin/${__availableToolchainMachines}-gcc${TOOL_OS_SUFFIX}" --version
+   OUTPUT_VARIABLE __availableToolchainCompilerVersions OUTPUT_STRIP_TRAILING_WHITESPACE )
+  string( REGEX MATCH "[0-9]+.[0-9]+.[0-9]+" __availableToolchainCompilerVersions "${__availableToolchainCompilerVersions}" )
+ endif()
+endif()
+
+#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 "${ANDROID_SUPPORTED_NATIVE_API_LEVELS}" )
+ file( GLOB __availableToolchains RELATIVE "${ANDROID_NDK}/toolchains" "${ANDROID_NDK}/toolchains/*" )
+ __LIST_FILTER( __availableToolchains "^[.]" )
+ set( __availableToolchainMachines "" )
+ set( __availableToolchainArchs "" )
+ set( __availableToolchainCompilerVersions "" )
+ foreach( __toolchain ${__availableToolchains} )
+  __DETECT_TOOLCHAIN_MACHINE_NAME( __machine "${ANDROID_NDK}/toolchains/${__toolchain}/prebuilt/${ANDROID_NDK_HOST_SYSTEM_NAME}" )
+  if( __machine )
+   string( REGEX MATCH "[0-9]+.[0-9]+.[0-9]+$" __version "${__toolchain}" )
+   string( REGEX MATCH "^[^-]+" __arch "${__toolchain}" )
+   list( APPEND __availableToolchainMachines ${__machine} )
+   list( APPEND __availableToolchainArchs ${__arch} )
+   list( APPEND __availableToolchainCompilerVersions ${__version} )
+  else()
+   list( REMOVE_ITEM __availableToolchains "${__toolchain}" )
+  endif()
+ endforeach()
+ if( NOT __availableToolchains )
+  message( FATAL_ERROR "Could not any working toolchain in the NDK. Probably your Android NDK is broken." )
  endif()
- 
- __TOOLCHAIN_DETECT_API_LEVEL( "${ANDROID_NDK_SYSROOT}/usr/include/android/api-level.h" )
+endif()
 
- #message( STATUS "Using android NDK standalone toolchain from ${ANDROID_NDK_TOOLCHAIN_ROOT}" )
- set( BUILD_WITH_ANDROID_NDK_TOOLCHAIN True )
+#build list of available ABIs
+if( NOT ANDROID_SUPPORTED_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()
 endif()
 
-# specify the cross compiler
-set( CMAKE_C_COMPILER   "${ANDROID_NDK_TOOLCHAIN_ROOT}/bin/arm-linux-androideabi-gcc${TOOL_OS_SUFFIX}"     CACHE PATH "gcc" FORCE )
-set( CMAKE_CXX_COMPILER "${ANDROID_NDK_TOOLCHAIN_ROOT}/bin/arm-linux-androideabi-g++${TOOL_OS_SUFFIX}"     CACHE PATH "g++" FORCE )
-#there may be a way to make cmake deduce these TODO deduce the rest of the tools
-set( CMAKE_AR           "${ANDROID_NDK_TOOLCHAIN_ROOT}/bin/arm-linux-androideabi-ar${TOOL_OS_SUFFIX}"      CACHE PATH "archive" FORCE )
-set( CMAKE_LINKER       "${ANDROID_NDK_TOOLCHAIN_ROOT}/bin/arm-linux-androideabi-ld${TOOL_OS_SUFFIX}"      CACHE PATH "linker" FORCE )
-set( CMAKE_NM           "${ANDROID_NDK_TOOLCHAIN_ROOT}/bin/arm-linux-androideabi-nm${TOOL_OS_SUFFIX}"      CACHE PATH "nm" FORCE )
-set( CMAKE_OBJCOPY      "${ANDROID_NDK_TOOLCHAIN_ROOT}/bin/arm-linux-androideabi-objcopy${TOOL_OS_SUFFIX}" CACHE PATH "objcopy" FORCE )
-set( CMAKE_OBJDUMP      "${ANDROID_NDK_TOOLCHAIN_ROOT}/bin/arm-linux-androideabi-objdump${TOOL_OS_SUFFIX}" CACHE PATH "objdump" FORCE )
-set( CMAKE_STRIP        "${ANDROID_NDK_TOOLCHAIN_ROOT}/bin/arm-linux-androideabi-strip${TOOL_OS_SUFFIX}"   CACHE PATH "strip" FORCE )
-set( CMAKE_RANLIB       "${ANDROID_NDK_TOOLCHAIN_ROOT}/bin/arm-linux-androideabi-ranlib${TOOL_OS_SUFFIX}"  CACHE PATH "ranlib" FORCE )
-
-#setup build targets, mutually exclusive
-set( PossibleArmTargets "armeabi;armeabi-v7a;armeabi-v7a with NEON;armeabi-v7a with VFPV3" )
-#compatibility junk for previous version of toolchain
-if( DEFINED ARM_TARGETS AND NOT DEFINED ARM_TARGET )
- set( ARM_TARGET "${ARM_TARGETS}" )
-endif()
-IF( NOT ARM_TARGET)
- set( ARM_TARGET armeabi-v7a )
-ENDIF()
-set( ARM_TARGET "${ARM_TARGET}" CACHE INTERNAL "the arm target for android, recommend armeabi-v7a for floating point support and NEON." )
-set_property( CACHE ARM_TARGET PROPERTY STRINGS ${PossibleArmTargets} )
-
-#set these flags for client use
-if( ARM_TARGET STREQUAL "armeabi" )
+#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: \"${PRINTABLE_ANDROID_SUPPORTED_ABIS}\"
+   " )
+endif()
+unset( __androidAbiIdx )
+
+#remember target ABI
+set( ANDROID_ABI "${ANDROID_ABI}" CACHE STRING "The target ABI for Android. If arm, then armeabi-v7a is recommended for hardware floating point." FORCE )
+
+#set target ABI options
+if( ANDROID_ABI STREQUAL "x86" )
+ set( X86 true )
+ set( ANDROID_NDK_ABI_NAME "x86" )
+ set( ANDROID_ARCH_NAME "x86" )
+ set( CMAKE_SYSTEM_PROCESSOR "i686" )
+elseif( ANDROID_ABI STREQUAL "armeabi" )
  set( ARMEABI true )
- set( ARMEABI_NDK_NAME "armeabi" )
- set( NEON false )
+ set( ANDROID_NDK_ABI_NAME "armeabi" )
+ set( ANDROID_ARCH_NAME "arm" )
  set( CMAKE_SYSTEM_PROCESSOR "armv5te" )
-else()
- if( ARM_TARGET STREQUAL "armeabi-v7a with NEON" )
-  set( NEON true )
-  set( VFPV3 true )
- elseif( ARM_TARGET STREQUAL "armeabi-v7a with VFPV3" )
-  set( VFPV3 true )
- elseif( NOT ARM_TARGET STREQUAL "armeabi-v7a")
-  message( FATAL_ERROR "Unsupported ARM_TARGET=${ARM_TARGET} is specified.
-Supported values are: \"armeabi\", \"armeabi-v7a\", \"armeabi-v7a with NEON\", \"armeabi-v7a with VFPV3\"
-" )
- endif()
+elseif( ANDROID_ABI STREQUAL "armeabi-v6 with VFP" )
+ set( ARMEABI_V6 true )
+ set( ANDROID_NDK_ABI_NAME "armeabi" )
+ set( ANDROID_ARCH_NAME "arm" )
+ set( CMAKE_SYSTEM_PROCESSOR "armv6" )
+ #need always fallback to older platform
+ set( ARMEABI true )
+elseif( ANDROID_ABI STREQUAL "armeabi-v7a")
+ set( ARMEABI_V7A true )
+ set( ANDROID_NDK_ABI_NAME "armeabi-v7a" )
+ set( ANDROID_ARCH_NAME "arm" )
+ set( CMAKE_SYSTEM_PROCESSOR "armv7-a" )
+elseif( ANDROID_ABI STREQUAL "armeabi-v7a with VFPV3" )
+ set( ARMEABI_V7A true )
+ set( ANDROID_NDK_ABI_NAME "armeabi-v7a" )
+ set( ANDROID_ARCH_NAME "arm" )
+ set( CMAKE_SYSTEM_PROCESSOR "armv7-a" )
+ set( VFPV3 true )
+elseif( ANDROID_ABI STREQUAL "armeabi-v7a with NEON" )
  set( ARMEABI_V7A true )
- set( ARMEABI_NDK_NAME "armeabi-v7a" )
+ set( ANDROID_NDK_ABI_NAME "armeabi-v7a" )
+ set( ANDROID_ARCH_NAME "arm" )
  set( CMAKE_SYSTEM_PROCESSOR "armv7-a" )
+ set( VFPV3 true )
+ set( NEON true )
+else()
+ message( SEND_ERROR "Unknown ANDROID_ABI=\"${ANDROID_ABI}\" is specified." )
 endif()
 
-#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( ANDROID_SUPPORTED_ABIS ${ANDROID_SUPPORTED_ABIS_${ANDROID_ARCH_NAME}} CACHE INTERNAL "ANDROID_ABI can be changed only to one of these ABIs. Changing to any other ABI requires to reset cmake cache." )
+if( CMAKE_VERSION VERSION_GREATER "2.8" )
+ list( SORT ANDROID_SUPPORTED_ABIS_${ANDROID_ARCH_NAME} )
+ set_property( CACHE ANDROID_ABI PROPERTY STRINGS ${ANDROID_SUPPORTED_ABIS_${ANDROID_ARCH_NAME}} )
+endif()
 
-SET( DO_NOT_CHANGE_OUTPUT_PATHS_ON_FIRST_PASS OFF CACHE BOOL "")
-if( DO_NOT_CHANGE_OUTPUT_PATHS_ON_FIRST_PASS )
- if( EXISTS "${CMAKE_SOURCE_DIR}/jni/CMakeLists.txt" )
-  set( EXECUTABLE_OUTPUT_PATH "${LIBRARY_OUTPUT_PATH_ROOT}/bin/${ARMEABI_NDK_NAME}" CACHE PATH "Output directory for applications")
- else()
-  set( EXECUTABLE_OUTPUT_PATH "${LIBRARY_OUTPUT_PATH_ROOT}/bin" CACHE PATH "Output directory for applications")
- endif()
- set( LIBRARY_OUTPUT_PATH "${LIBRARY_OUTPUT_PATH_ROOT}/libs/${ARMEABI_NDK_NAME}" CACHE PATH "path for android libs")
- set( CMAKE_INSTALL_PREFIX "${ANDROID_NDK_TOOLCHAIN_ROOT}/user" CACHE STRING "path for installing" )
+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()
-SET( DO_NOT_CHANGE_OUTPUT_PATHS_ON_FIRST_PASS ON CACHE INTERNAL "" FORCE)
 
-# where is the target environment 
-set( CMAKE_FIND_ROOT_PATH "${ANDROID_NDK_TOOLCHAIN_ROOT}/bin" "${ANDROID_NDK_TOOLCHAIN_ROOT}/arm-linux-androideabi" "${ANDROID_NDK_SYSROOT}" "${CMAKE_INSTALL_PREFIX}" "${CMAKE_INSTALL_PREFIX}/share" )
+#choose toolchain
+if( ANDROID_TOOLCHAIN_NAME )
+ list( FIND __availableToolchains "${ANDROID_TOOLCHAIN_NAME}" __toolchainIdx )
+ if( __toolchainIdx EQUAL -1 )
+  message( FATAL_ERROR "Previously selected toolchain \"${ANDROID_TOOLCHAIN_NAME}\" is missing. You need to remove CMakeCache.txt and rerun cmake manually to change the toolchain" )
+ endif()
+ list( GET __availableToolchainArchs ${__toolchainIdx} __toolchainArch )
+ if( NOT __toolchainArch STREQUAL ANDROID_ARCH_NAME )
+  message( SEND_ERROR "Previously selected toolchain \"${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_NAME )
+   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 ${__toolchainIdx} ANDROID_COMPILER_VERSION )
+set( ANDROID_TOOLCHAIN_NAME "${ANDROID_TOOLCHAIN_NAME}" CACHE INTERNAL "Name of toolchain used" )
+set( ANDROID_COMPILER_VERSION "${ANDROID_COMPILER_VERSION}" CACHE INTERNAL "compiler version from selected toolchain" )
+unset( __toolchainIdx )
+unset( __availableToolchains )
+unset( __availableToolchainMachines )
+unset( __availableToolchainArchs )
+unset( __availableToolchainCompilerVersions )
+
+#choose native API level
+__INIT_VARIABLE( ANDROID_NATIVE_API_LEVEL ENV_ANDROID_NATIVE_API_LEVEL ANDROID_API_LEVEL ENV_ANDROID_API_LEVEL ANDROID_DEFAULT_NDK_API_LEVEL_${ANDROID_ARCH_NAME} ANDROID_DEFAULT_NDK_API_LEVEL )
+string( REGEX MATCH "[0-9]+" ANDROID_NATIVE_API_LEVEL "${ANDROID_NATIVE_API_LEVEL}" )
+#validate
+list( FIND ANDROID_SUPPORTED_NATIVE_API_LEVELS "${ANDROID_NATIVE_API_LEVEL}" __levelIdx )
+if( __levelIdx EQUAL -1 )
+ message( SEND_ERROR "Specified Android native API level (${ANDROID_NATIVE_API_LEVEL}) is not supported by your NDK/toolchain." )
+endif()
+unset( __levelIdx )
+if( BUILD_WITH_ANDROID_NDK )
+ __DETECT_NATIVE_API_LEVEL( __realApiLevel "${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()
 
+#setup paths
+if( BUILD_WITH_STANDALONE_TOOLCHAIN )
+ set( ANDROID_TOOLCHAIN_ROOT "${ANDROID_STANDALONE_TOOLCHAIN}" )
+ set( ANDROID_SYSROOT "${ANDROID_STANDALONE_TOOLCHAIN}/sysroot" )
+ set( __stlLibPath "${ANDROID_STANDALONE_TOOLCHAIN}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib" )
+endif()
 if( BUILD_WITH_ANDROID_NDK )
- set( STL_PATH "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++" )
- set( STL_LIBRARIES_PATH "${STL_PATH}/libs/${ARMEABI_NDK_NAME}" )
- include_directories(SYSTEM "${STL_PATH}/include" "${STL_LIBRARIES_PATH}/include" )
-# if ( NOT ARMEABI AND NOT FORCE_ARM )
-#  set( STL_LIBRARIES_PATH "${ANDROID_NDK_TOOLCHAIN_ROOT}/arm-linux-androideabi/lib/${CMAKE_SYSTEM_PROCESSOR}/thumb" )
-# endif()
+ set( ANDROID_TOOLCHAIN_ROOT "${ANDROID_NDK}/toolchains/${ANDROID_TOOLCHAIN_NAME}/prebuilt/${ANDROID_NDK_HOST_SYSTEM_NAME}" )
+ set( ANDROID_SYSROOT "${ANDROID_NDK}/platforms/android-${ANDROID_NATIVE_API_LEVEL}/arch-${ANDROID_ARCH_NAME}" )
+ if( ANDROID_USE_STLPORT )
+  set( __stlIncludePath "${ANDROID_NDK}/sources/cxx-stl/stlport/stlport" )
+  set( __stlLibPath "${ANDROID_NDK}/sources/cxx-stl/stlport/libs/${ANDROID_NDK_ABI_NAME}" )
+ else()
+  set( __stlIncludePath "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/include" )
+  set( __stlLibPath "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/libs/${ANDROID_NDK_ABI_NAME}" )
+ endif()
 endif()
 
-if( BUILD_WITH_ANDROID_NDK_TOOLCHAIN )
- set( STL_LIBRARIES_PATH "${ANDROID_NDK_TOOLCHAIN_ROOT}/arm-linux-androideabi/lib" )
- if( NOT ARMEABI )
-  set( STL_LIBRARIES_PATH "${STL_LIBRARIES_PATH}/${CMAKE_SYSTEM_PROCESSOR}" )
+# specify the cross compiler
+set( CMAKE_C_COMPILER   "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-gcc${TOOL_OS_SUFFIX}"     CACHE PATH "gcc" )
+set( CMAKE_CXX_COMPILER "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-g++${TOOL_OS_SUFFIX}"     CACHE PATH "g++" )
+set( CMAKE_STRIP        "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-strip${TOOL_OS_SUFFIX}"   CACHE PATH "strip" )
+#there may be a way to make cmake deduce these TODO deduce the rest of the tools
+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" )
+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()
- if( NOT FORCE_ARM )
-  set( STL_LIBRARIES_PATH "${STL_LIBRARIES_PATH}/thumb" )
+ mark_as_advanced( CMAKE_INSTALL_NAME_TOOL )
+endif()
+#export directories
+set( ANDROID_SYSTEM_INCLUDE_DIRS "" )
+set( ANDROID_SYSTEM_LIB_DIRS "" )
+
+#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" )
+
+set( DO_NOT_CHANGE_OUTPUT_PATHS_ON_FIRST_PASS OFF CACHE BOOL "" )
+if( DO_NOT_CHANGE_OUTPUT_PATHS_ON_FIRST_PASS )
+ 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()
- #for some reason this is needed? TODO figure out why...
- include_directories(SYSTEM "${ANDROID_NDK_TOOLCHAIN_ROOT}/arm-linux-androideabi/include/c++/4.4.3/arm-linux-androideabi" )
+ set( LIBRARY_OUTPUT_PATH "${LIBRARY_OUTPUT_PATH_ROOT}/libs/${ANDROID_NDK_ABI_NAME}" CACHE PATH "path for android libs" )
 endif()
+set( DO_NOT_CHANGE_OUTPUT_PATHS_ON_FIRST_PASS ON CACHE INTERNAL "" FORCE )
 
-# 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 )
+#includes
+list( APPEND ANDROID_SYSTEM_INCLUDE_DIRS "${ANDROID_SYSROOT}/usr/include" )
+if( __stlIncludePath AND EXISTS "${__stlIncludePath}" )
+ list( APPEND ANDROID_SYSTEM_INCLUDE_DIRS "${__stlIncludePath}" )
+endif()
 
-set( CMAKE_CXX_FLAGS "-fPIC -DANDROID -Wno-psabi -fsigned-char" )
-set( CMAKE_C_FLAGS "-fPIC -DANDROID -Wno-psabi -fsigned-char" )
+#STL bits includes
+if( __stlLibPath AND EXISTS "${__stlLibPath}/include" )
+ list( APPEND ANDROID_SYSTEM_INCLUDE_DIRS "${__stlLibPath}/include" )
+endif()
+if( ANDROID_ARCH_NAME STREQUAL "arm" AND EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/${CMAKE_SYSTEM_PROCESSOR}/thumb/bits" )
+ list( APPEND ANDROID_SYSTEM_INCLUDE_DIRS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/${CMAKE_SYSTEM_PROCESSOR}/thumb" )
+elseif( EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/${CMAKE_SYSTEM_PROCESSOR}/bits" )
+ list( APPEND ANDROID_SYSTEM_INCLUDE_DIRS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/${CMAKE_SYSTEM_PROCESSOR}" )
+elseif( ANDROID_ARCH_NAME STREQUAL "arm" AND EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/thumb/bits" )
+ list( APPEND ANDROID_SYSTEM_INCLUDE_DIRS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/thumb" )
+elseif( EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/bits" )
+ list( APPEND ANDROID_SYSTEM_INCLUDE_DIRS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}/${ANDROID_TOOLCHAIN_MACHINE_NAME}" )
+endif()
 
-set( FORCE_ARM OFF CACHE BOOL "Use 32-bit ARM instructions instead of Thumb-1" )
-if( NOT FORCE_ARM )
- #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( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mthumb" )
- set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mthumb" )
+#flags and definitions
+if(ANDROID_SYSROOT MATCHES "[ ;\"]")
+ set( ANDROID_CXX_FLAGS "--sysroot=\"${ANDROID_SYSROOT}\"" )
+ # quotes will break try_compile and compiler identification
+ message(WARNING "Your Android system root has non-alphanumeric symbols. It can break compiler features detection and the whole build.")
 else()
- set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -marm" )
- set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -marm" )
+ set( ANDROID_CXX_FLAGS "--sysroot=${ANDROID_SYSROOT}" )
 endif()
 
-if( BUILD_WITH_ANDROID_NDK )
- set( CMAKE_CXX_FLAGS "--sysroot=\"${ANDROID_NDK_SYSROOT}\" ${CMAKE_CXX_FLAGS}" )
- set( CMAKE_C_FLAGS "--sysroot=\"${ANDROID_NDK_SYSROOT}\" ${CMAKE_C_FLAGS}" )
+remove_definitions( -DANDROID )
+add_definitions( -DANDROID )
+
+# Force set compilers because standard identification works badly for us
+include( CMakeForceCompiler )
+CMAKE_FORCE_C_COMPILER( "${CMAKE_C_COMPILER}" GNU )
+CMAKE_FORCE_CXX_COMPILER( "${CMAKE_CXX_COMPILER}" GNU )
+set( CMAKE_SIZEOF_VOID_P 4 )
+set( CMAKE_C_SIZEOF_DATA_PTR 4 )
+set( CMAKE_CXX_SIZEOF_DATA_PTR 4 )
+
+# NDK flags
+if( ARMEABI OR ARMEABI_V7A )
+ # NDK also defines -ffunction-sections -funwind-tables but they result in worse OpenCV performance
+ set( CMAKE_CXX_FLAGS "-fPIC -Wno-psabi" )
+ set( CMAKE_C_FLAGS "-fPIC -Wno-psabi" )
+ if( ANDROID_USE_STLPORT )
+  set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti -fno-exceptions" )
+  set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fno-rtti -fno-exceptions" )
+ else()
+  set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -frtti -fexceptions" )
+  set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fexceptions" )
+ endif()
+ remove_definitions( -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ )
+ add_definitions( -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ )
+ # extra arm-specific flags
+ set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -fsigned-char" )
+elseif( X86 )
+ set( CMAKE_CXX_FLAGS "-ffunction-sections -funwind-tables" )
+ set( CMAKE_C_FLAGS "-ffunction-sections -funwind-tables" )
+ if( ANDROID_USE_STLPORT )
+  set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti -fno-exceptions" )
+  set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fno-rtti -fno-exceptions" )
+ else()
+  set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -frtti -fexceptions" )
+  set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fexceptions" )
+ endif()
+else()
+ set( CMAKE_CXX_FLAGS "" )
+ set( CMAKE_C_FLAGS "" )
+endif()
 
- # workaround for ugly cmake bug - compiler identification replaces all spaces (and somethimes " !!!) in compiler flags with ; symbol
- # as result identification fails if ANDROID_NDK_SYSROOT contain spaces
- include(CMakeForceCompiler)
- CMAKE_FORCE_C_COMPILER("${CMAKE_C_COMPILER}" GNU)
- CMAKE_FORCE_CXX_COMPILER("${CMAKE_CXX_COMPILER}" GNU)
+#release and debug flags
+if( ARMEABI OR ARMEABI_V7A )
+ 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).
+  # O3 instead of O2/Os in release mode - like cmake sets for desktop gcc
+  set( CMAKE_CXX_FLAGS_RELEASE "-mthumb -O3" )
+  set( CMAKE_C_FLAGS_RELEASE   "-mthumb -O3" )
+  set( CMAKE_CXX_FLAGS_DEBUG "-marm -Os -finline-limit=64" )
+  set( CMAKE_C_FLAGS_DEBUG   "-marm -Os -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( CMAKE_CXX_FLAGS_RELEASE "-marm -O3 -fstrict-aliasing" )
+  set( CMAKE_C_FLAGS_RELEASE   "-marm -O3 -fstrict-aliasing" )
+  set( CMAKE_CXX_FLAGS_DEBUG "-marm -O0 -finline-limit=300" )
+  set( CMAKE_C_FLAGS_DEBUG   "-marm -O0 -finline-limit=300" )
+ endif()
+elseif( X86 )
+ set( CMAKE_CXX_FLAGS_RELEASE "-O3 -fstrict-aliasing" )
+ set( CMAKE_C_FLAGS_RELEASE   "-O3 -fstrict-aliasing" )
+ set( CMAKE_CXX_FLAGS_DEBUG "-O0 -finline-limit=300" )
+ set( CMAKE_C_FLAGS_DEBUG   "-O0 -finline-limit=300" )
 endif()
+set( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -fomit-frame-pointer -DNDEBUG" )
+set( CMAKE_C_FLAGS_RELEASE   "${CMAKE_C_FLAGS_RELEASE}   -fomit-frame-pointer -DNDEBUG" )
+set( CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -fno-strict-aliasing -fno-omit-frame-pointer -DDEBUG -D_DEBUG" )
+set( CMAKE_C_FLAGS_DEBUG   "${CMAKE_C_FLAGS_DEBUG}   -fno-strict-aliasing -fno-omit-frame-pointer -DDEBUG -D_DEBUG" )
 
+#ABI-specific flags
 if( ARMEABI_V7A )
- #these are required flags for android armv7-a
- set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=armv7-a -mfloat-abi=softfp" )
- set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=armv7-a -mfloat-abi=softfp" )
+ set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -march=armv7-a -mfloat-abi=softfp" )
  if( NEON )
-  set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mfpu=neon" )
-  set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfpu=neon" )
+  set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -mfpu=neon" )
  elseif( VFPV3 )
-  set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mfpu=vfpv3" )
-  set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfpu=vfpv3" )
+  set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -mfpu=vfpv3" )
+ else()
+  set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -mfpu=vfp" )
  endif()
+elseif( ARMEABI_V6 )
+ set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -march=armv6 -mfloat-abi=softfp -mfpu=vfp" )
+elseif( ARMEABI )
+ set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -march=armv5te -mtune=xscale -msoft-float" )
+elseif( X86 )
+ set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS}" )#sse?
 endif()
 
-set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}" CACHE STRING "c++ flags" )
-set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS}" CACHE STRING "c flags" )
-      
-#-Wl,-L${LIBCPP_LINK_DIR},-lstdc++,-lsupc++
-#-L${LIBCPP_LINK_DIR} -lstdc++ -lsupc++
-#Also, this is *required* to use the following linker flags that routes around
-#a CPU bug in some Cortex-A8 implementations:
-set( LINKER_FLAGS "-Wl,--fix-cortex-a8 -L\"${STL_LIBRARIES_PATH}\" -L\"${CMAKE_INSTALL_PREFIX}/libs/${ARMEABI_NDK_NAME}\" -lstdc++ -lsupc++ " )
-
-set( NO_UNDEFINED ON CACHE BOOL "Don't all undefined symbols" )
-if( NO_UNDEFINED )
+#linker flags
+list( APPEND ANDROID_SYSTEM_LIB_DIRS "${CMAKE_BINARY_DIR}/systemlibs/${ANDROID_NDK_ABI_NAME}" "${CMAKE_INSTALL_PREFIX}/libs/${ANDROID_NDK_ABI_NAME}" )
+set( LINKER_FLAGS "" )
+#STL
+if( ANDROID_USE_STLPORT )
+ if( EXISTS "${__stlLibPath}/libstlport_static.a" )
+  __COPY_IF_DIFFERENT( "${__stlLibPath}/libstlport_static.a" "${CMAKE_BINARY_DIR}/systemlibs/${ANDROID_NDK_ABI_NAME}/libstlport_static.a" )
+ endif()
+ if( EXISTS "${CMAKE_BINARY_DIR}/systemlibs/${ANDROID_NDK_ABI_NAME}/libstlport_static.a" )
+  set( LINKER_FLAGS "${LINKER_FLAGS} -Wl,--start-group -lstlport_static" )
+ endif()
+else( ANDROID_USE_STLPORT )
+ if( EXISTS "${__stlLibPath}/libgnustl_static.a" )
+  __COPY_IF_DIFFERENT( "${__stlLibPath}/libgnustl_static.a" "${CMAKE_BINARY_DIR}/systemlibs/${ANDROID_NDK_ABI_NAME}/libstdc++.a" )
+ elseif( ANDROID_ARCH_NAME STREQUAL "arm" AND EXISTS "${__stlLibPath}/${CMAKE_SYSTEM_PROCESSOR}/thumb/libstdc++.a" )
+  __COPY_IF_DIFFERENT( "${__stlLibPath}/${CMAKE_SYSTEM_PROCESSOR}/thumb/libstdc++.a" "${CMAKE_BINARY_DIR}/systemlibs/${ANDROID_NDK_ABI_NAME}/libstdc++.a" )
+ elseif( ANDROID_ARCH_NAME STREQUAL "arm" AND EXISTS "${__stlLibPath}/${CMAKE_SYSTEM_PROCESSOR}/libstdc++.a" )
+  __COPY_IF_DIFFERENT( "${__stlLibPath}/${CMAKE_SYSTEM_PROCESSOR}/libstdc++.a" "${CMAKE_BINARY_DIR}/systemlibs/${ANDROID_NDK_ABI_NAME}/libstdc++.a" )
+ elseif( ANDROID_ARCH_NAME STREQUAL "arm" AND EXISTS "${__stlLibPath}/thumb/libstdc++.a" )
+  __COPY_IF_DIFFERENT( "${__stlLibPath}/thumb/libstdc++.a" "${CMAKE_BINARY_DIR}/systemlibs/${ANDROID_NDK_ABI_NAME}/libstdc++.a" )
+ elseif( EXISTS "${__stlLibPath}/libstdc++.a" )
+  __COPY_IF_DIFFERENT( "${__stlLibPath}/libstdc++.a" "${CMAKE_BINARY_DIR}/systemlibs/${ANDROID_NDK_ABI_NAME}/libstdc++.a" )
+ endif()
+ if( EXISTS "${CMAKE_BINARY_DIR}/systemlibs/${ANDROID_NDK_ABI_NAME}/libstdc++.a" )
+  set( LINKER_FLAGS "${LINKER_FLAGS} -lstdc++" )
+ endif()
+
+ #gcc exception & rtti support
+ if( EXISTS "${__stlLibPath}/libsupc++.a" )
+  __COPY_IF_DIFFERENT( "${__stlLibPath}/libsupc++.a" "${CMAKE_BINARY_DIR}/systemlibs/${ANDROID_NDK_ABI_NAME}/libsupc++.a" )
+ elseif( ANDROID_ARCH_NAME STREQUAL "arm" AND EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}/thumb/libsupc++.a" )
+  __COPY_IF_DIFFERENT( "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}/thumb/libsupc++.a" "${CMAKE_BINARY_DIR}/systemlibs/${ANDROID_NDK_ABI_NAME}/libsupc++.a" )
+ elseif( ANDROID_ARCH_NAME STREQUAL "arm" AND EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}/libsupc++.a" )
+  __COPY_IF_DIFFERENT( "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}/libsupc++.a" "${CMAKE_BINARY_DIR}/systemlibs/${ANDROID_NDK_ABI_NAME}/libsupc++.a" )
+ elseif( ANDROID_ARCH_NAME STREQUAL "arm" AND EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/thumb/libsupc++.a" )
+  __COPY_IF_DIFFERENT( "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/thumb/libsupc++.a" "${CMAKE_BINARY_DIR}/systemlibs/${ANDROID_NDK_ABI_NAME}/libsupc++.a" )
+ elseif( EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/libsupc++.a" )
+  __COPY_IF_DIFFERENT( "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/libsupc++.a" "${CMAKE_BINARY_DIR}/systemlibs/${ANDROID_NDK_ABI_NAME}/libsupc++.a" )
+ endif()
+ if( EXISTS "${CMAKE_BINARY_DIR}/systemlibs/${ANDROID_NDK_ABI_NAME}/libsupc++.a" )
+  set( LINKER_FLAGS "${LINKER_FLAGS} -lsupc++" )
+ endif()
+endif( ANDROID_USE_STLPORT )
+
+#cleanup for STL search
+unset( __stlIncludePath )
+unset( __stlLibPath )
+
+#other linker flags
+__INIT_VARIABLE( ANDROID_NO_UNDEFINED OBSOLETE_NO_UNDEFINED VALUES ON )
+set( ANDROID_NO_UNDEFINED ${ANDROID_NO_UNDEFINED} CACHE BOOL "Show all undefined symbols as linker errors" FORCE )
+mark_as_advanced( ANDROID_NO_UNDEFINED )
+if( ANDROID_NO_UNDEFINED )
  set( LINKER_FLAGS "-Wl,--no-undefined ${LINKER_FLAGS}" )
 endif()
 
-set( CMAKE_SHARED_LINKER_FLAGS "${LINKER_FLAGS}" CACHE STRING "linker flags" FORCE )
-set( CMAKE_MODULE_LINKER_FLAGS "${LINKER_FLAGS}" CACHE STRING "linker flags" FORCE )
-set( CMAKE_EXE_LINKER_FLAGS "${LINKER_FLAGS}" CACHE STRING "linker flags" FORCE )
+if (ANDROID_NDK MATCHES "-r[56].?$")
+ #libGLESv2.so in NDK's prior to r7 refers to exteranal 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()
+set( ANDROID_SO_UNDEFINED ${ANDROID_SO_UNDEFINED} CACHE BOOL "Allows or disallows undefined symbols in shared libraries" FORCE )
+mark_as_advanced( ANDROID_SO_UNDEFINED )
+if( ANDROID_SO_UNDEFINED )
+ set( LINKER_FLAGS "${LINKER_FLAGS} -Wl,-allow-shlib-undefined" )
+endif()
+
+if( ARMEABI_V7A )
+ # this is *required* to use the following linker flags that routes around
+ # a CPU bug in some Cortex-A8 implementations:
+ set( LINKER_FLAGS "-Wl,--fix-cortex-a8 ${LINKER_FLAGS}" )
+endif()
+
+#cache flags
+set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}" CACHE STRING "c++ flags" )
+set( CMAKE_C_FLAGS "${CMAKE_CXX_FLAGS}" CACHE STRING "c flags" )
+set( CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}" CACHE STRING "c++ Release flags" )
+set( CMAKE_C_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}" CACHE STRING "c Release flags" )
+set( CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}" CACHE STRING "c++ Debug flags" )
+set( CMAKE_C_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}" CACHE STRING "c Debug flags" )
+set( CMAKE_SHARED_LINKER_FLAGS "${LINKER_FLAGS}" CACHE STRING "linker flags" )
+set( CMAKE_MODULE_LINKER_FLAGS "${LINKER_FLAGS}" CACHE STRING "linker flags" )
+set( CMAKE_EXE_LINKER_FLAGS "-Wl,--gc-sections -Wl,-z,nocopyreloc ${LINKER_FLAGS}" CACHE STRING "linker flags" )
+
+include_directories( SYSTEM ${ANDROID_SYSTEM_INCLUDE_DIRS} )
+link_directories( ${ANDROID_SYSTEM_LIB_DIRS} )
+
+#finish flags
+set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS}" CACHE INTERNAL "Extra Android falgs")
+set( CMAKE_CXX_FLAGS "${ANDROID_CXX_FLAGS} ${CMAKE_CXX_FLAGS}" )
+set( CMAKE_C_FLAGS   "${ANDROID_CXX_FLAGS} ${CMAKE_C_FLAGS}" )
 
 #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)
+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 )
@@ -378,13 +899,15 @@ macro(find_host_package)
  find_package( ${ARGN} )
  SET( WIN32 )
  SET( APPLE )
- SET( UNIX 1)
+ 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)
+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 )
@@ -398,10 +921,102 @@ macro(find_host_program)
  find_program( ${ARGN} )
  SET( WIN32 )
  SET( APPLE )
- SET( UNIX 1)
+ 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()
 
-MARK_AS_ADVANCED(FORCE_ARM NO_UNDEFINED)
+
+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" )
+ 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 ANDROID_ABI ANDROID_FORCE_ARM_BUILD ANDROID_NATIVE_API_LEVEL ANDROID_NO_UNDEFINED ANDROID_SO_UNDEFINED ANDROID_SET_OBSOLETE_VARIABLES LIBRARY_OUTPUT_PATH_ROOT ANDROID_USE_STLPORT ANDROID_FORBID_SYGWIN ANDROID_NDK ANDROID_STANDALONE_TOOLCHAIN )
+  if( DEFINED ${__var} )
+   set( __toolchain_config "${__toolchain_config}set( ${__var} \"${${__var}}\" )\n" )
+  endif()
+ endforeach()
+ file( WRITE "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/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"
+#   ANDROID_FORCE_ARM_BUILD : ON/OFF
+#   ANDROID_NATIVE_API_LEVEL : 3,4,5,8,9,14 (depends on NDK version)
+#   ANDROID_NO_UNDEFINED : ON/OFF
+#   ANDROID_SO_UNDEFINED : OFF/ON  (default depends on NDK version)
+#   ANDROID_SET_OBSOLETE_VARIABLES : ON/OFF
+#   LIBRARY_OUTPUT_PATH_ROOT : <any valid path>
+#   ANDROID_USE_STLPORT : OFF/ON - EXPERIMENTAL!!! 
+#   ANDROID_FORBID_SYGWIN : ON/OFF
+# Can be set only at the first run:
+#   ANDROID_NDK
+#   ANDROID_STANDALONE_TOOLCHAIN
+# 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_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
+#   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" or "x86" depending on ANDROID_ABI
+#   ANDROID_ARCH_NAME : "arm" or "x86" depending on ANDROID_ABI
+#   TOOL_OS_SUFFIX : "" or ".exe" depending on host platform
+#   ANDROID_SYSTEM_INCLUDE_DIRS
+#   ANDROID_SYSTEM_LIB_DIRS
+# 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_SYSROOT : path to the compiler sysroot
+#   ANDROID_TOOLCHAIN_NAME : "standalone", "arm-linux-androideabi-4.4.3" or "x86-4.4.3" or something similar.
+#   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_SUPPORTED_NATIVE_API_LEVELS : list of native API levels found inside NDK
+#
+# 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