Merge remote-tracking branch 'origin/master'

android/android.toolchain.cmake

 # ------------------------------------------------------------------------------
 #  Android CMake toolchain file, for use with the Android NDK r5-r8
-#  Requires cmake 2.6.3 or newer (2.8.3 or newer is recommended).
+#  Requires cmake 2.6.3 or newer (2.8.5 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
@@ -44,7 +44,8 @@
 #    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:
+#
+#      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.
@@ -56,6 +57,8 @@
 #        "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
+#            (not testes on real devices)
 #
 #    ANDROID_NATIVE_API_LEVEL=android-8 - level of Android API compile for.
 #      Option is read-only when standalone toolchain used.
@@ -183,12 +186,13 @@
 #   - modified August 2012
 #     [+] updated for NDK r8b
 #     [~] all intermediate files generated by toolchain are moved into CMakeFiles
+#     [~] libstdc++ and libsupc are removed from explicit link libraries
 # ------------------------------------------------------------------------------
 
 cmake_minimum_required( VERSION 2.6.3 )
 
 if( DEFINED CMAKE_CROSSCOMPILING )
- #subsequent toolchain loading is not really needed
+ # subsequent toolchain loading is not really needed
  return()
 endif()
 
@@ -199,7 +203,7 @@ endif()
 
 # this one is important
 set( CMAKE_SYSTEM_NAME Linux )
-#this one not so much
+# this one not so much
 set( CMAKE_SYSTEM_VERSION 1 )
 
 set( ANDROID_SUPPORTED_NDK_VERSIONS ${ANDROID_EXTRA_NDK_VERSIONS} -r8b -r8 -r7c -r7b -r7 -r6b -r6 -r5c -r5b -r5 "" )
@@ -331,11 +335,11 @@ macro( __COPY_IF_DIFFERENT _source _destination )
 endmacro()
 
 
-#stl version: by default gnustl_static will be used
+# 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 )
 
-#fight against cygwin
+# 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 )
@@ -344,7 +348,7 @@ if( ANDROID_FORBID_SYGWIN )
  endif()
 
  if( CMAKE_HOST_WIN32 )
-  #remove cygwin from PATH
+  # remove cygwin from PATH
   set( __new_path "$ENV{PATH}")
   __LIST_FILTER( __new_path "cygwin" )
   set(ENV{PATH} "${__new_path}")
@@ -352,7 +356,7 @@ if( ANDROID_FORBID_SYGWIN )
  endif()
 endif()
 
-#detect current host platform
+# detect current host platform
 set( TOOL_OS_SUFFIX "" )
 if( CMAKE_HOST_APPLE )
  set( ANDROID_NDK_HOST_SYSTEM_NAME "darwin-x86" )
@@ -365,10 +369,10 @@ else()
  message( FATAL_ERROR "Cross-compilation on your platform is not supported by this cmake toolchain" )
 endif()
 
-#see if we have path to Android NDK
+# 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
+ # 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 )
@@ -397,10 +401,10 @@ if( NOT ANDROID_NDK )
  endif( NOT ANDROID_STANDALONE_TOOLCHAIN )
 endif( NOT ANDROID_NDK )
 
-#remember found paths
+# remember found paths
 if( ANDROID_NDK )
  get_filename_component( ANDROID_NDK "${ANDROID_NDK}" ABSOLUTE )
- #try to detect change
+ # try to detect change
  if( CMAKE_AR )
   string( LENGTH "${ANDROID_NDK}" __length )
   string( SUBSTRING "${CMAKE_AR}" 0 ${__length} __androidNdkPreviousPath )
@@ -414,7 +418,7 @@ if( ANDROID_NDK )
  set( BUILD_WITH_ANDROID_NDK True )
 elseif( ANDROID_STANDALONE_TOOLCHAIN )
  get_filename_component( ANDROID_STANDALONE_TOOLCHAIN "${ANDROID_STANDALONE_TOOLCHAIN}" ABSOLUTE )
- #try to detect change
+ # try to detect change
  if( CMAKE_AR )
   string( LENGTH "${ANDROID_STANDALONE_TOOLCHAIN}" __length )
   string( SUBSTRING "${CMAKE_AR}" 0 ${__length} __androidStandaloneToolchainPreviousPath )
@@ -438,7 +442,7 @@ else()
       sudo ln -s ~/my-android-toolchain ${ANDROID_STANDALONE_TOOLCHAIN_SEARCH_PATH}" )
 endif()
 
-#get all the details about standalone toolchain
+# 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 ${ANDROID_SUPPORTED_NATIVE_API_LEVELS} )
@@ -455,7 +459,7 @@ if( BUILD_WITH_STANDALONE_TOOLCHAIN )
   set( __availableToolchainArchs "mipsel" )
  endif()
  if( ANDROID_COMPILER_VERSION )
-  #do not run gcc every time because it is relatevely expencive
+  # do not run gcc every time because it is relatevely expencive
   set( __availableToolchainCompilerVersions "${ANDROID_COMPILER_VERSION}" )
  else()
   execute_process( COMMAND "${ANDROID_STANDALONE_TOOLCHAIN}/bin/${__availableToolchainMachines}-gcc${TOOL_OS_SUFFIX}" --version
@@ -464,7 +468,7 @@ if( BUILD_WITH_STANDALONE_TOOLCHAIN )
  endif()
 endif()
 
-#get all the details about NDK
+# 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}" )
@@ -490,7 +494,7 @@ if( BUILD_WITH_ANDROID_NDK )
  endif()
 endif()
 
-#build list of available ABIs
+# build list of available ABIs
 if( NOT ANDROID_SUPPORTED_ABIS )
  set( ANDROID_SUPPORTED_ABIS "" )
  set( __uniqToolchainArchNames ${__availableToolchainArchs} )
@@ -505,9 +509,9 @@ if( NOT ANDROID_SUPPORTED_ABIS )
  endif()
 endif()
 
-#choose target ABI
+# choose target ABI
 __INIT_VARIABLE( ANDROID_ABI OBSOLETE_ARM_TARGET OBSOLETE_ARM_TARGETS VALUES ${ANDROID_SUPPORTED_ABIS} )
-#verify that target ABI is supported
+# verify that target ABI is supported
 list( FIND ANDROID_SUPPORTED_ABIS "${ANDROID_ABI}" __androidAbiIdx )
 if( __androidAbiIdx EQUAL -1 )
  string( REPLACE ";" "\", \"", PRINTABLE_ANDROID_SUPPORTED_ABIS  "${ANDROID_SUPPORTED_ABIS}" )
@@ -517,10 +521,10 @@ if( __androidAbiIdx EQUAL -1 )
 endif()
 unset( __androidAbiIdx )
 
-#remember target ABI
+# 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
+# set target ABI options
 if( ANDROID_ABI STREQUAL "x86" )
  set( X86 true )
  set( ANDROID_NDK_ABI_NAME "x86" )
@@ -545,7 +549,7 @@ elseif( ANDROID_ABI STREQUAL "armeabi-v6 with VFP" )
  set( ANDROID_ARCH_NAME "arm" )
  set( ANDROID_ARCH_FULLNAME "arm" )
  set( CMAKE_SYSTEM_PROCESSOR "armv6" )
- #need always fallback to older platform
+ # need always fallback to older platform
  set( ARMEABI true )
 elseif( ANDROID_ABI STREQUAL "armeabi-v7a")
  set( ARMEABI_V7A true )
@@ -573,8 +577,8 @@ else()
 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...
+ # 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()
 
@@ -592,7 +596,7 @@ else()
  unset( ANDROID_FORCE_ARM_BUILD CACHE )
 endif()
 
-#choose toolchain
+# choose toolchain
 if( ANDROID_TOOLCHAIN_NAME )
  list( FIND __availableToolchains "${ANDROID_TOOLCHAIN_NAME}" __toolchainIdx )
  if( __toolchainIdx EQUAL -1 )
@@ -637,10 +641,10 @@ unset( __availableToolchainMachines )
 unset( __availableToolchainArchs )
 unset( __availableToolchainCompilerVersions )
 
-#choose native API level
+# 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}" )
-#validate
+# 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." )
@@ -659,7 +663,7 @@ if( CMAKE_VERSION VERSION_GREATER "2.8" )
  set_property( CACHE ANDROID_NATIVE_API_LEVEL PROPERTY STRINGS ${ANDROID_SUPPORTED_NATIVE_API_LEVELS} )
 endif()
 
-#setup paths
+# setup paths
 if( BUILD_WITH_STANDALONE_TOOLCHAIN )
  set( ANDROID_TOOLCHAIN_ROOT "${ANDROID_STANDALONE_TOOLCHAIN}" )
  set( ANDROID_SYSROOT "${ANDROID_STANDALONE_TOOLCHAIN}/sysroot" )
@@ -689,7 +693,7 @@ set( CMAKE_ASM_COMPILER "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHI
 if( CMAKE_VERSION VERSION_LESS 2.8.5 )
  set( CMAKE_ASM_COMPILER_ARG1 "-c" )
 endif()
-#there may be a way to make cmake deduce these TODO deduce the rest of the tools
+# there may be a way to make cmake deduce these TODO deduce the rest of the tools
 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" )
@@ -705,11 +709,12 @@ if( APPLE )
  endif()
  mark_as_advanced( CMAKE_INSTALL_NAME_TOOL )
 endif()
-#export directories
+
+# export directories
 set( ANDROID_SYSTEM_INCLUDE_DIRS "" )
 set( ANDROID_SYSTEM_LIB_DIRS "" )
 
-#setup output directories
+# 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" )
 
@@ -722,13 +727,13 @@ if(NOT _CMAKE_IN_TRY_COMPILE)
  set( LIBRARY_OUTPUT_PATH "${LIBRARY_OUTPUT_PATH_ROOT}/libs/${ANDROID_NDK_ABI_NAME}" CACHE PATH "path for android libs" )
 endif()
 
-#includes
+# includes
 list( APPEND ANDROID_SYSTEM_INCLUDE_DIRS "${ANDROID_SYSROOT}/usr/include" )
 if( __stlIncludePath AND EXISTS "${__stlIncludePath}" )
  list( APPEND ANDROID_SYSTEM_INCLUDE_DIRS "${__stlIncludePath}" )
 endif()
 
-#STL bits includes
+# c++ bits includes
 if( __stlLibPath AND EXISTS "${__stlLibPath}/include" )
  list( APPEND ANDROID_SYSTEM_INCLUDE_DIRS "${__stlLibPath}/include" )
 endif()
@@ -742,7 +747,7 @@ elseif( EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/incl
  list( APPEND ANDROID_SYSTEM_INCLUDE_DIRS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}/${ANDROID_TOOLCHAIN_MACHINE_NAME}" )
 endif()
 
-#flags and definitions
+# flags and definitions
 if(ANDROID_SYSROOT MATCHES "[ ;\"]")
  set( ANDROID_CXX_FLAGS "--sysroot=\"${ANDROID_SYSROOT}\"" )
  # quotes will break try_compile and compiler identification
@@ -766,7 +771,7 @@ 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 )
-#force ASM compiler (required for CMake < 2.8.5)
+# 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 )
@@ -796,17 +801,17 @@ endif()
 
 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" )
+ set( _CMAKE_C_FLAGS "${_CMAKE_C_FLAGS} -fno-exceptions" )
 else()
  set( _CMAKE_CXX_FLAGS "${_CMAKE_CXX_FLAGS} -frtti -fexceptions" )
  set( _CMAKE_C_FLAGS "${_CMAKE_C_FLAGS} -fexceptions" )
 endif()
 
-#release and debug flags
+# 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).
+  # 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" )
@@ -836,7 +841,7 @@ set( _CMAKE_C_FLAGS_RELEASE   "${_CMAKE_C_FLAGS_RELEASE}   -fomit-frame-pointer
 set( _CMAKE_CXX_FLAGS_DEBUG "${_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
+# ABI-specific flags
 if( ARMEABI_V7A )
  set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -march=armv7-a -mfloat-abi=softfp" )
  if( NEON )
@@ -854,19 +859,18 @@ elseif( X86 )
  set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS}" )#sse?
 endif()
 
-#linker flags
+# linker flags
 if( NOT DEFINED __ndklibspath )
  set( __ndklibspath "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/ndklibs/${ANDROID_NDK_ABI_NAME}" )
 endif()
-list( APPEND ANDROID_SYSTEM_LIB_DIRS "${__ndklibspath}" "${CMAKE_INSTALL_PREFIX}/libs/${ANDROID_NDK_ABI_NAME}" )
+list( APPEND ANDROID_SYSTEM_LIB_DIRS "${CMAKE_INSTALL_PREFIX}/libs/${ANDROID_NDK_ABI_NAME}" )
 set( ANDROID_LINKER_FLAGS "" )
-#STL
+
+# STL
 if( ANDROID_USE_STLPORT )
  if( EXISTS "${__stlLibPath}/libstlport_static.a" )
-  __COPY_IF_DIFFERENT( "${__stlLibPath}/libstlport_static.a" "${__ndklibspath}/libstlport_static.a" )
- endif()
- if( EXISTS "${__ndklibspath}/libstlport_static.a" )
-  set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -Wl,--start-group -lstlport_static" )
+  set( CMAKE_CXX_CREATE_SHARED_LIBRARY "<CMAKE_CXX_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <SONAME_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES> \"${__stlLibPath}/libstlport_static.a\"")
+  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> <SONAME_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES> \"${__stlLibPath}/libstlport_static.a\"")
  endif()
 else( ANDROID_USE_STLPORT )
  if( EXISTS "${__stlLibPath}/libgnustl_static.a" )
@@ -880,11 +884,6 @@ else( ANDROID_USE_STLPORT )
  elseif( EXISTS "${__stlLibPath}/libstdc++.a" )
   __COPY_IF_DIFFERENT( "${__stlLibPath}/libstdc++.a" "${__ndklibspath}/libstdc++.a" )
  endif()
- if( EXISTS "${__ndklibspath}/libstdc++.a" )
-  set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -lstdc++" )
- endif()
-
- #gcc exception & rtti support
  if( EXISTS "${__stlLibPath}/libsupc++.a" )
   __COPY_IF_DIFFERENT( "${__stlLibPath}/libsupc++.a" "${__ndklibspath}/libsupc++.a" )
  elseif( ANDROID_ARCH_NAME STREQUAL "arm" AND EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}/thumb/libsupc++.a" )
@@ -896,16 +895,14 @@ else( ANDROID_USE_STLPORT )
  elseif( EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/libsupc++.a" )
   __COPY_IF_DIFFERENT( "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/libsupc++.a" "${__ndklibspath}/libsupc++.a" )
  endif()
- if( EXISTS "${__ndklibspath}/libsupc++.a" )
-  set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -lsupc++" )
- endif()
+ list( APPEND ANDROID_SYSTEM_LIB_DIRS "${__ndklibspath}" )
 endif( ANDROID_USE_STLPORT )
 
-#cleanup for STL search
+# cleanup for STL search
 unset( __stlIncludePath )
 unset( __stlLibPath )
 
-#other linker flags
+# 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 )
@@ -914,7 +911,7 @@ if( ANDROID_NO_UNDEFINED )
 endif()
 
 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.
+ # 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 )
@@ -940,7 +937,7 @@ if( ARMEABI_V7A )
  set( ANDROID_LINKER_FLAGS "-Wl,--fix-cortex-a8 ${ANDROID_LINKER_FLAGS}" )
 endif()
 
-#cache flags
+# cache flags
 set( CMAKE_CXX_FLAGS "${_CMAKE_CXX_FLAGS}" CACHE STRING "c++ flags" )
 set( CMAKE_C_FLAGS "${_CMAKE_C_FLAGS}" CACHE STRING "c flags" )
 set( CMAKE_CXX_FLAGS_RELEASE "${_CMAKE_CXX_FLAGS_RELEASE}" CACHE STRING "c++ Release flags" )
@@ -954,7 +951,7 @@ set( CMAKE_EXE_LINKER_FLAGS "-Wl,-z,nocopyreloc" CACHE STRING "linker flags" )
 include_directories( SYSTEM ${ANDROID_SYSTEM_INCLUDE_DIRS} )
 link_directories( ${ANDROID_SYSTEM_LIB_DIRS} )
 
-#finish flags
+# finish flags
 set( ANDROID_CXX_FLAGS    "${ANDROID_CXX_FLAGS}"    CACHE INTERNAL "Extra Android compiler flags")
 set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS}" CACHE INTERNAL "Extra Android linker flags")
 set( CMAKE_CXX_FLAGS           "${ANDROID_CXX_FLAGS} ${CMAKE_CXX_FLAGS}" )
@@ -969,7 +966,7 @@ else()
  set( CMAKE_EXE_LINKER_FLAGS    "${ANDROID_LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS}" )
 endif()
 
-#set these global flags for cmake client scripts to change behavior
+# set these global flags for cmake client scripts to change behavior
 set( ANDROID True )
 set( BUILD_ANDROID True )
 
@@ -982,7 +979,7 @@ 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 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 )
@@ -1004,7 +1001,7 @@ macro( find_host_package )
 endmacro()
 
 
-#macro to find programs on the host OS
+# 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 )
@@ -1044,7 +1041,11 @@ 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 ANDROID_FUNCTION_LEVEL_LINKING __ndklibspath )
   if( DEFINED ${__var} )
-   set( __toolchain_config "${__toolchain_config}set( ${__var} \"${${__var}}\" )\n" )
+   if( "${__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}" )