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# ----------------------------------------------------------------------------
# Android CMake toolchain file, for use with the ndk r5
# See home page: http://code.google.com/p/android-cmake/
#
# Usage Linux:
# $ export ANDROID_NDK=/<absolute path to NDK>
# $ cmake -DCMAKE_TOOLCHAIN_FILE=<path to this file>/android.toolchain.cmake ..
# $ make
#
# 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
#
# Usage Windows:
# You need native port of make to build your project.
# For example this one: http://gnuwin32.sourceforge.net/packages/make.htm
#
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# $ SET ANDROID_NDK=C:\<absolute path to NDK>\android-ndk-r5c
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# $ 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
#
#
# Toolchain options (can be set as cmake parameters: -D<option_name>=<value>):
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# ANDROID_NDK=/opt/android-ndk-r5c - path to NDK root.
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# Can be set as environment variable.
#
# 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_API_LEVEL=android-8 - level of android API to use.
# Option is ignored when build uses stanalone toolchain.
#
# ARM_TARGET=armeabi-v7a - type of floating point support.
# Other possible values are: "armeabi", "armeabi-v7a with NEON", "armeabi-v7a with VFPV3"
#
# FORCE_ARM=false - set true to generate 32-bit ARM instructions instead of Thumb-1.
#
# NO_UNDEFINED=true - set true to show all undefined symbols will as linker errors even if they are not used.
#
#
# 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
#
#
# 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 and BUILD_ANDROID will be set to true, you may test these
# variables to make necessary 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.
#
# 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
#
# Base system is Linux, but you may need to change things
# for android compatibility.
#
#
# - 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)
# [+] 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
# [~] toolchain exits with error if ARM_TARGET is not recognized
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# - 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
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# [-] removed SWIG-related stuff from toolchain
# [+] added macro find_host_package, find_host_program to search packages/programs on host system
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# [~] fixed path to STL library
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# ----------------------------------------------------------------------------
# this one is important
set ( CMAKE_SYSTEM_NAME Linux )
#this one not so much
set ( CMAKE_SYSTEM_VERSION 1 )
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set ( ANDROID_NDK_DEFAULT_SEARCH_PATH /opt/android-ndk-r5c )
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set ( ANDROID_NDK_TOOLCHAIN_DEFAULT_SEARCH_PATH /opt/android-toolchain )
set ( TOOL_OS_SUFFIX "" )
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macro ( __TOOLCHAIN_DETECT_API_LEVEL _path )
SET ( _expected ${ ARGV1 } )
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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}" )
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if ( DEFINED _expected )
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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 path for android NDK -- look
if ( NOT DEFINED ANDROID_NDK )
set ( ANDROID_NDK $ENV{ ANDROID_NDK } )
endif ( )
if ( NOT EXISTS ${ ANDROID_NDK } )
if ( EXISTS ${ ANDROID_NDK_DEFAULT_SEARCH_PATH } )
set ( ANDROID_NDK ${ ANDROID_NDK_DEFAULT_SEARCH_PATH } )
message ( STATUS "Using default path for android NDK ${ANDROID_NDK}" )
message ( STATUS "If you prefer to use a different location, please define the environment variable: ANDROID_NDK" )
endif ( )
endif ( )
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" )
else ( )
message ( FATAL_ERROR "Your platform is not supported" )
endif ( )
set ( ANDROID_API_LEVEL $ENV{ ANDROID_API_LEVEL } )
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string ( REGEX REPLACE "[\t ]*android-([0-9]+)[\t ]*" "\\1" ANDROID_API_LEVEL "${ANDROID_API_LEVEL}" )
string ( REGEX REPLACE "[\t ]*([0-9]+)[\t ]*" "\\1" ANDROID_API_LEVEL "${ANDROID_API_LEVEL}" )
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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 ${ PossibleAndroidLevels } )
if ( NOT ANDROID_API_LEVEL GREATER 2 )
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set ( ANDROID_API_LEVEL 8 )
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message ( STATUS "Using default android API level android-${ANDROID_API_LEVEL}" )
message ( STATUS "If you prefer to use a different API level, please define the environment variable: ANDROID_API_LEVEL" )
endif ( )
set ( ANDROID_NDK_TOOLCHAIN_ROOT "${ANDROID_NDK}/toolchains/arm-linux-androideabi-4.4.3/prebuilt/${NDKSYSTEM}" )
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set ( ANDROID_NDK_SYSROOT "${ANDROID_NDK}/platforms/android-${ANDROID_API_LEVEL}/arch-arm" )
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__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 DEFINED ANDROID_NDK_TOOLCHAIN_ROOT )
set ( ANDROID_NDK_TOOLCHAIN_ROOT $ENV{ ANDROID_NDK_TOOLCHAIN_ROOT } )
endif ( )
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 environment variable: ANDROID_NDK_TOOLCHAIN_ROOT" )
endif ( )
set ( ANDROID_NDK_TOOLCHAIN_ROOT ${ ANDROID_NDK_TOOLCHAIN_ROOT } CACHE PATH "root of the Android NDK standalone toolchain" FORCE )
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set ( ANDROID_NDK_SYSROOT "${ANDROID_NDK_TOOLCHAIN_ROOT}/sysroot" )
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if ( NOT EXISTS ${ ANDROID_NDK_TOOLCHAIN_ROOT } )
message ( FATAL_ERROR " neither ${ ANDROID_NDK } nor ${ ANDROID_NDK_TOOLCHAIN_ROOT } does not exist!
Y o u s h o u l d e i t h e r s e t a n e n v i r o n m e n t v a r i a b l e :
e x p o r t A N D R O I D _ N D K = ~ / m y - a n d r o i d - n d k
o r
e x p o r t A N D R O I D _ N D K _ T O O L C H A I N _ R O O T = ~ / m y - a n d r o i d - t o o l c h a i n
o r p u t t h e t o o l c h a i n o r N D K i n t h e d e f a u l t p a t h :
s u d o l n - s ~ / m y - a n d r o i d - n d k $ { A N D R O I D _ N D K _ D E F A U L T _ S E A R C H _ P A T H }
s u d o l n - s ~ / m y - a n d r o i d - t o o l c h a i n $ { A N D R O I D _ N D K _ T O O L C H A I N _ D E F A U L T _ S E A R C H _ P A T H } " )
endif ( )
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__TOOLCHAIN_DETECT_API_LEVEL ( "${ANDROID_NDK_SYSROOT}/usr/include/android/api-level.h" )
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#message( STATUS "Using android NDK standalone toolchain from ${ANDROID_NDK_TOOLCHAIN_ROOT}" )
set ( BUILD_WITH_ANDROID_NDK_TOOLCHAIN True )
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" )
set ( ARM_TARGET "armeabi-v7a" CACHE STRING "the arm target for android, recommend armeabi-v7a for floating point support and NEON." )
set_property ( CACHE ARM_TARGET PROPERTY STRINGS ${ PossibleArmTargets } )
#compatibility junk for previous version of toolchain
if ( DEFINED ARM_TARGETS AND NOT DEFINED ARM_TARGET )
SET ( ARM_TARGET "${ARM_TARGETS}" )
endif ( )
#set these flags for client use
if ( ARM_TARGET STREQUAL "armeabi" )
set ( ARMEABI true )
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set ( ARMEABI_NDK_NAME "armeabi" CACHE STRING "NDK eabi name" FORCE )
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set ( NEON false )
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set ( CMAKE_SYSTEM_PROCESSOR "armv5te" )
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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.
S u p p o r t e d v a l u e s a r e : \ " a r m e a b i \ " , \ " a r m e a b i - v 7 a \ " , \ " a r m e a b i - v 7 a w i t h N E O N \ " , \ " a r m e a b i - v 7 a w i t h V F P V 3 \ "
" )
endif ( )
set ( ARMEABI_V7A true )
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set ( ARMEABI_NDK_NAME "armeabi-v7a" CACHE STRING "NDK eabi name" FORCE )
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set ( CMAKE_SYSTEM_PROCESSOR "armv7-a" )
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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 ( DO_NOT_CHANGE_OUTPUT_PATHS_ON_FIRST_PASS OFF CACHE BOOL "" )
if ( DO_NOT_CHANGE_OUTPUT_PATHS_ON_FIRST_PASS )
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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" FORCE )
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else ( )
set ( EXECUTABLE_OUTPUT_PATH ${ LIBRARY_OUTPUT_PATH_ROOT } /bin CACHE PATH "Output directory for applications" FORCE )
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endif ( )
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set ( LIBRARY_OUTPUT_PATH ${ LIBRARY_OUTPUT_PATH_ROOT } /libs/ ${ ARMEABI_NDK_NAME } CACHE PATH "path for android libs" FORCE )
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set ( CMAKE_INSTALL_PREFIX ${ ANDROID_NDK_TOOLCHAIN_ROOT } /user CACHE STRING "path for installing" FORCE )
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endif ( )
SET ( DO_NOT_CHANGE_OUTPUT_PATHS_ON_FIRST_PASS ON CACHE INTERNAL "" FORCE )
# where is the target environment
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set ( CMAKE_FIND_ROOT_PATH ${ ANDROID_NDK_TOOLCHAIN_ROOT } /bin ${ ANDROID_NDK_TOOLCHAIN_ROOT } /arm-linux-androideabi ${ ANDROID_NDK_SYSROOT } ${ CMAKE_INSTALL_PREFIX } ${ CMAKE_INSTALL_PREFIX } /share )
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if ( BUILD_WITH_ANDROID_NDK )
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set ( STL_PATH "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++" )
set ( STL_LIBRARIES_PATH "${STL_PATH}/libs/${ARMEABI_NDK_NAME}" )
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include_directories ( "${STL_PATH}/include" "${STL_LIBRARIES_PATH}/include" )
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# if ( NOT ARMEABI AND NOT FORCE_ARM )
# set( STL_LIBRARIES_PATH "${ANDROID_NDK_TOOLCHAIN_ROOT}/arm-linux-androideabi/lib/${CMAKE_SYSTEM_PROCESSOR}/thumb" )
# endif()
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endif ( )
if ( BUILD_WITH_ANDROID_NDK_TOOLCHAIN )
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set ( STL_LIBRARIES_PATH "${ANDROID_NDK_TOOLCHAIN_ROOT}/arm-linux-androideabi/lib" )
if ( NOT ARMEABI )
set ( STL_LIBRARIES_PATH "${STL_LIBRARIES_PATH}/${CMAKE_SYSTEM_PROCESSOR}" )
endif ( )
if ( NOT FORCE_ARM )
set ( STL_LIBRARIES_PATH "${STL_LIBRARIES_PATH}/thumb" )
endif ( )
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#for some reason this is needed? TODO figure out why...
include_directories ( ${ ANDROID_NDK_TOOLCHAIN_ROOT } /arm-linux-androideabi/include/c++/4.4.3/arm-linux-androideabi )
endif ( )
# only search for libraries and includes in the ndk toolchain
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set ( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY )
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set ( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
set ( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )
set ( CMAKE_CXX_FLAGS "-fPIC -DANDROID -Wno-psabi -fsigned-char" )
set ( CMAKE_C_FLAGS "-fPIC -DANDROID -Wno-psabi -fsigned-char" )
set ( FORCE_ARM OFF CACHE BOOL "Use 32-bit ARM instructions instead of Thumb-1" )
if ( NOT FORCE_ARM )
#It is recommended to use the -mthumb compiler flag to force the generation
#of 16-bit Thumb-1 instructions (the default being 32-bit ARM ones).
set ( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mthumb" )
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mthumb" )
else ( )
set ( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -marm" )
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -marm" )
endif ( )
if ( BUILD_WITH_ANDROID_NDK )
set ( CMAKE_CXX_FLAGS "--sysroot=${ANDROID_NDK_SYSROOT} ${CMAKE_CXX_FLAGS}" )
set ( CMAKE_C_FLAGS "--sysroot=${ANDROID_NDK_SYSROOT} ${CMAKE_C_FLAGS}" )
endif ( )
if ( ARMEABI_V7A )
#these are required flags for android armv7-a
set ( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=armv7-a -mfloat-abi=softfp" )
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=armv7-a -mfloat-abi=softfp" )
if ( NEON )
set ( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mfpu=neon" )
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfpu=neon" )
elseif ( VFPV3 )
set ( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mfpu=vfpv3" )
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfpu=vfpv3" )
endif ( )
endif ( )
set ( CMAKE_CXX_FLAGS "${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${LIBCPP_LINK_DIR} -lstdc++ -lsupc++
#Also, this is *required* to use the following linker flags that routes around
#a CPU bug in some Cortex-A8 implementations:
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set ( LINKER_FLAGS "-Wl,--fix-cortex-a8 -L${STL_LIBRARIES_PATH} -L${CMAKE_INSTALL_PREFIX}/libs/${ARMEABI_NDK_NAME} -lstdc++ -lsupc++ " )
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set ( NO_UNDEFINED ON CACHE BOOL "Don't all undefined symbols" )
if ( 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 )
#set these global flags for cmake client scripts to change behavior
set ( ANDROID True )
set ( BUILD_ANDROID True )
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#macro to find packages on the host OS
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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 )
find_package ( ${ ARGN } )
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set ( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY )
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set ( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
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set ( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )
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endmacro ( )
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#macro to find programs on the host OS
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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 )
find_program ( ${ ARGN } )
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 ( )
