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1# ------------------------------------------------------------------------------
2# Android CMake toolchain file, for use with the Android NDK r5-r8
3# Requires cmake 2.6.3 or newer (2.8.5 or newer is recommended).
4# See home page: http://code.google.com/p/android-cmake/
5#
6# The file is mantained by the OpenCV project. And also can be found at
7# http://code.opencv.org/projects/opencv/repository/revisions/master/changes/android/android.toolchain.cmake
8#
9# Note: There are now two flavors of this toolchain file: 32-bit toolchain and 64-bit toolchain.
10#
11# Usage Linux:
12# $ export ANDROID_NDK_ROOT=/absolute/path/to/the/android-ndk
13# $ mkdir build && cd build
14# $ cmake -DCMAKE_TOOLCHAIN_FILE=path/to/the/android.toolchain.cmake ..
15# $ make -j8
16#
17# Usage Linux (using standalone toolchain):
18# $ export ANDROID_STANDALONE_TOOLCHAIN=/absolute/path/to/android-toolchain
19# $ mkdir build && cd build
20# $ cmake -DCMAKE_TOOLCHAIN_FILE=path/to/the/android.toolchain.cmake ..
21# $ make -j8
22#
23# Usage Windows:
24# You need native port of make to build your project.
25# Android NDK r7 (or newer) already has make.exe on board.
26# For older NDK you have to install it separately.
27# For example, this one: http://gnuwin32.sourceforge.net/packages/make.htm
28#
29# $ SET ANDROID_NDK_ROOT=C:\absolute\path\to\the\android-ndk
30# $ mkdir build && cd build
31# $ cmake.exe -G"MinGW Makefiles"
32# -DCMAKE_TOOLCHAIN_FILE=path\to\the\android.toolchain.cmake
33# -DCMAKE_MAKE_PROGRAM="%ANDROID_NDK_ROOT%\prebuilt\windows\bin\make.exe" ..
34# $ "%ANDROID_NDK_ROOT%\prebuilt\windows\bin\make.exe"
35#
36#
37# Options (can be set as cmake parameters: -D<option_name>=<value>):
38# ANDROID_NDK=/opt/android-ndk - path to the NDK root.
39# Can be set as environment variable ANDROID_NDK_ROOT. Can be set only at first cmake run.
40#
41# ANDROID_STANDALONE_TOOLCHAIN=/opt/android-toolchain - path to the
42# standalone toolchain. This option overrides ANDROID_NDK
43# (and subsequentally the enviroment variable ANDROID_NDK_ROOT).
44# Can be set as environment variable. Can be set only at first cmake run.
45#
46# ANDROID_ABI=armeabi-v7a - specifies the target Application Binary
47# Interface (ABI). This option nearly matches to the APP_ABI variable
48# used by ndk-build tool from Android NDK.
49#
50# Possible targets are:
51# "armeabi" - matches to the NDK ABI with the same name.
52# See ${ANDROID_NDK_ROOT}/docs/CPU-ARCH-ABIS.html for the documentation.
53# "armeabi-v7a" - matches to the NDK ABI with the same name.
54# See ${ANDROID_NDK_ROOT}/docs/CPU-ARCH-ABIS.html for the documentation.
55# "armeabi-v7a with NEON" - same as armeabi-v7a, but
56# sets NEON as floating-point unit
57# "armeabi-v7a with VFPV3" - same as armeabi-v7a, but
58# sets VFPV3 as floating-point unit (has 32 registers instead of 16).
59# "armeabi-v6 with VFP" - tuned for ARMv6 processors having VFP.
60# "x86" - matches to the NDK ABI with the same name.
61# See ${ANDROID_NDK_ROOT}/docs/CPU-ARCH-ABIS.html for the documentation.
62# "mips" - matches to the NDK ABI with the same name
63# (not testes on real devices)
64#
65# ANDROID_NATIVE_API_LEVEL=android-8 - level of Android API compile for.
66# Option is read-only when standalone toolchain used.
67#
68# ANDROID_FORCE_ARM_BUILD=OFF - set true to generate 32-bit ARM instructions
69# instead of Thumb-1. Is not available for "x86" (inapplicable) and
70# "armeabi-v6 with VFP" (forced) ABIs.
71#
72# ANDROID_NO_UNDEFINED=ON - set true to show all undefined symbols as linker
73# errors even if they are not used.
74#
75# ANDROID_SO_UNDEFINED=OFF - set true to allow undefined symbols in shared
76# libraries. Automatically turned on for NDK r5x and r6x due to GLESv2
77# problems.
78#
79# LIBRARY_OUTPUT_PATH_ROOT=${CMAKE_SOURCE_DIR} - where to output binary
80# files. See additional details below.
81#
82# ANDROID_SET_OBSOLETE_VARIABLES=ON - it set, then toolchain defines some
83# obsolete variables which were set by previous versions of this file for
84# backward compatibility.
85#
86#
87# What?:
88# android-cmake toolchain searches for NDK/toolchain in the following order:
89# ANDROID_NDK - cmake parameter
90# ANDROID_NDK_ROOT - environment variable
91# (ANDROID_NDK - environment variable as legacy fallback)
92# ANDROID_STANDALONE_TOOLCHAIN - cmake parameter
93# ANDROID_STANDALONE_TOOLCHAIN - environment variable
94# ANDROID_NDK - default locations
95# ANDROID_STANDALONE_TOOLCHAIN - default locations
96#
97# Make sure to do the following in your scripts:
98# SET( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${my_cxx_flags}" )
99# SET( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${my_cxx_flags}" )
100# The flags will be prepopulated with critical flags, so don't loose them.
101# Also be aware that toolchain also sets configuration-specific compiler
102# flags and linker flags.
103#
104# ANDROID and BUILD_ANDROID will be set to true, you may test any of these
105# variables to make necessary Android-specific configuration changes.
106#
107# Also ARMEABI or ARMEABI_V7A or X86 will be set true, mutually exclusive.
108# NEON option will be set true if VFP is set to NEON.
109#
110# LIBRARY_OUTPUT_PATH_ROOT should be set in cache to determine where Android
111# libraries will be installed.
112# Default is ${CMAKE_SOURCE_DIR}, and the android libs will always be
113# under the ${LIBRARY_OUTPUT_PATH_ROOT}/libs/${ANDROID_NDK_ABI_NAME}
114# (depending on the target ABI). This is convenient for Android packaging.
115#
116# Authors:
117# Ethan Rublee ethan.ruble@gmail.com
118# Andrey Kamaev andrey.kamaev@itseez.com
119# Eric Wing <ewing . public |-at-| gmail . com>
120#
121# Change Log:
122# - initial version December 2010
123# - modified April 2011
124# [+] added possibility to build with NDK (without standalone toolchain)
125# [+] support cross-compilation on Windows (native, no cygwin support)
126# [+] added compiler option to force "char" type to be signed
127# [+] added toolchain option to compile to 32-bit ARM instructions
128# [+] added toolchain option to disable SWIG search
129# [+] added platform "armeabi-v7a with VFPV3"
130# [~] ARM_TARGETS renamed to ARM_TARGET
131# [+] EXECUTABLE_OUTPUT_PATH is set by toolchain (required on Windows)
132# [~] Fixed bug with ANDROID_API_LEVEL variable
133# [~] turn off SWIG search if it is not found first time
134# - modified May 2011
135# [~] ANDROID_LEVEL is renamed to ANDROID_API_LEVEL
136# [+] ANDROID_API_LEVEL is detected by toolchain if not specified
137# [~] added guard to prevent changing of output directories on the first
138# cmake pass
139# [~] toolchain exits with error if ARM_TARGET is not recognized
140# - modified June 2011
141# [~] default NDK path is updated for version r5c
142# [+] variable CMAKE_SYSTEM_PROCESSOR is set based on ARM_TARGET
143# [~] toolchain install directory is added to linker paths
144# [-] removed SWIG-related stuff from toolchain
145# [+] added macro find_host_package, find_host_program to search
146# packages/programs on the host system
147# [~] fixed path to STL library
148# - modified July 2011
149# [~] fixed options caching
150# [~] search for all supported NDK versions
151# [~] allowed spaces in NDK path
152# - modified September 2011
153# [~] updated for NDK r6b
154# - modified November 2011
155# [*] rewritten for NDK r7
156# [+] x86 toolchain support (experimental)
157# [+] added "armeabi-v6 with VFP" ABI for ARMv6 processors.
158# [~] improved compiler and linker flags management
159# [+] support different build flags for Release and Debug configurations
160# [~] by default compiler flags the same as used by ndk-build (but only
161# where reasonable)
162# [~] ANDROID_NDK_TOOLCHAIN_ROOT is splitted to ANDROID_STANDALONE_TOOLCHAIN
163# and ANDROID_TOOLCHAIN_ROOT
164# [~] ARM_TARGET is renamed to ANDROID_ABI
165# [~] ARMEABI_NDK_NAME is renamed to ANDROID_NDK_ABI_NAME
166# [~] ANDROID_API_LEVEL is renamed to ANDROID_NATIVE_API_LEVEL
167# - modified January 2012
168# [+] added stlport_static support (experimental)
169# [+] added special check for cygwin
170# [+] filtered out hidden files (starting with .) while globbing inside NDK
171# [+] automatically applied GLESv2 linkage fix for NDK revisions 5-6
172# [+] added ANDROID_GET_ABI_RAWNAME to get NDK ABI names by CMake flags
173# - modified February 2012
174# [+] updated for NDK r7b
175# [~] fixed cmake try_compile() command
176# [~] Fix for missing install_name_tool on OS X
177# - modified March 2012
178# [~] fixed incorrect C compiler flags
179# [~] fixed CMAKE_SYSTEM_PROCESSOR change on ANDROID_ABI change
180# [+] improved toolchain loading speed
181# [+] added assembler language support (.S)
182# [+] allowed preset search paths and extra search suffixes
183# - modified April 2012
184# [+] updated for NDK r7c
185# [~] fixed most of problems with compiler/linker flags and caching
186# [+] added option ANDROID_FUNCTION_LEVEL_LINKING
187# - modified May 2012
188# [+] updated for NDK r8
189# [+] added mips architecture support
190# - modified August 2012
191# [+] updated for NDK r8b
192# [~] all intermediate files generated by toolchain are moved into CMakeFiles
193# [~] libstdc++ and libsupc are removed from explicit link libraries
194# - modified August 2013 (EW)
195# [+] updated for NDK r9 (standalone)
196# [+] Addded Perl helper scripts to make it easier to build multiple architectures in one shot.
197# [~] Breaking change of behavior to so that ANDROID_STANDALONE_TOOLCHAIN overrides ANDROID_NDK because the latter uses semi-standard environmental variables that people may already have defined for other conflicting purposes.
198# [~] Changed environmental variable to look for ANDROID_NDK_ROOT because this is the semi-official/blessed one according to Google via the NDK mailing list. ANDROID_NDK is still checked for backwards compatibility.
199# [~] Changed a lot of flags to try to match stock Android more closely due build problems I was trying to track down. In the end, I lost track of which specific flags were the problem. See Additional Notes for flag differences between this and stock.
200# [~] Changed armeabi-v7a to use -mfpu=vfpv3-d16 instead of -mfpu=vfp to conform with stock Android.
201# [~] Changed VFPV3 mode to use -mfpu=vfpv3-d32
202# [~] Use --sysroot=${ANDROID_SYSROOT} to match stock Android
203# [~] Use -fstack-protector -no-canonical-prefixes -Wa,--noexecstack to match stock Android
204# [~] Use -no-canonical-prefixes -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now to match stock Android
205# [~] Use -lc -lm to match stock Android
206# [~] Removed -fsigned-char and -Wno-psabi because these don't appear in stock Android
207# [~] Removed -f[no]exceptions flags from C flags because those are C++ options
208# [~] Changed arm debug optimization level to O0 from Os
209# [~] Added -funswitch-loops -finline-limit=300 to match stock Android
210# [~] Changed arm debug optimization level to O0 from Os
211# [~] Separated ANDROID_CXX_FLAGS into ANDROID_CXX_FLAGS and ANDROID_C_FLAGS
212# [*] Note: MIPs settings were not changed/tested.
213#
214#
215# (EW) Additional Notes:
216# Looking at the switches used by compiling the hello-jni example from ndk-build V=1 in r8d, I see the following compiler flags:
217# armeabi
218# -MMD -MP -MF /foo/hello-jni.o.d
219# -fpic -ffunction-sections -funwind-tables -fstack-protector
220# -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -no-canonical-prefixes
221# -march=armv5te -mtune=xscale -msoft-float
222# -mthumb
223# -Os -g -DNDEBUG
224# -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64
225#
226# -O0 -UNDEBUG (debug only, not in release)
227# -marm -fno-omit-frame-pointer (debug only, not in release)
228#
229# -DANDROID -Wa,--noexecstack
230
231
232# armeabi-v7a
233# -MMD -MP -MF /foo/hello-jni.o.d
234# -fpic -ffunction-sections -funwind-tables -fstack-protector
235# -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -no-canonical-prefixes
236# -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16
237# -mthumb
238# -Os -g -DNDEBUG
239# -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64
240#
241# -O0 -UNDEBUG (debug only, not in release)
242# -marm -fno-omit-frame-pointer (debug only, not in release)
243#
244# -DANDROID -Wa,--noexecstack
245
246# x86
247# -MMD -MP -MF /foo/hello-jni.o.d
248# -ffunction-sections -funwind-tables -no-canonical-prefixes -fstack-protector
249# -O2 -g -DNDEBUG
250# -fomit-frame-pointer -fstrict-aliasing -funswitch-loops -finline-limit=300
251#
252# -O0 -UNDEBUG (debug only, not in release)
253# -fno-omit-frame-pointer -fno-strict-aliasing (debug only, not in release)
254#
255# -DANDROID -Wa,--noexecstack
256
257# The link flags are:
258
259
260# armeabi
261# -Wl,-soname,libhello-jni.so -shared
262# --sysroot=/fee/android-ndk/platforms/android-14/arch-arm
263# /foo/hello-jni.o
264# -no-canonical-prefixes -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now -lc -lm
265
266# armeabi-v7a
267# -Wl,-soname,libhello-jni.so -shared
268# --sysroot=/fee/android-ndk/platforms/android-14/arch-arm
269# /foo/hello-jni.o
270# -no-canonical-prefixes -march=armv7-a -Wl,--fix-cortex-a8 -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now -lc -lm
271
272# x86
273# -Wl,-soname,libhello-jni.so -shared
274# --sysroot=/fee/android-ndk/platforms/android-14/arch-x86
275# /foo/hello-jni.o
276# -no-canonical-prefixes -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now -lc -lm
277
278
279# Some interesting observations are that debug doesn't have different flags, but overrides set flags with additional switches.
280
281# Differences from Stock Android:
282# This toolchain has deviated from the stock flags.
283#
284# I don't do the override technique as described directly above.
285#
286# -ffunction-sections has been separated into the option ANDROID_FUNCTION_LEVEL_LINKING.
287# But this also brings in -fdata-sections and the linker flags -Wl,--gc-sections which are not in the Android defaults
288#
289# -funwind-tables has been completely removed for arm by this file. It looks like the author intentionally did this for performance.
290#
291# Optimization flags are using O3 in this file as opposed to stock 02 for Release. It looks like the original authors have done some benchmarking so I am deferring to them.
292# I am however changing the Os to O0 for debug.
293#
294# ------------------------------------------------------------------------------
295
296cmake_minimum_required( VERSION 2.6.3 )
297
298if( DEFINED CMAKE_CROSSCOMPILING )
299 # subsequent toolchain loading is not really needed
300 return()
301endif()
302
303get_property(_CMAKE_IN_TRY_COMPILE GLOBAL PROPERTY IN_TRY_COMPILE)
304if( _CMAKE_IN_TRY_COMPILE )
305 include( "${CMAKE_CURRENT_SOURCE_DIR}/../android.toolchain.config.cmake" OPTIONAL )
306endif()
307
308# this one is important
309set( CMAKE_SYSTEM_NAME Linux )
310# this one not so much
311set( CMAKE_SYSTEM_VERSION 1 )
312
313# There was an Android NDK bug with armv7 and vfpv3 in r7b which caused crashes according to
314# http://stackoverflow.com/questions/11831648/android-ndk-arm-build-settings-to-run-on-most-devices
315# Not supporting r7b or below seems wiser. Supporting ancient Android NDKs is rather pointless since part of the reason for the updates is to fix bugs.
316#set( ANDROID_SUPPORTED_NDK_VERSIONS ${ANDROID_EXTRA_NDK_VERSIONS} -r8d -r8b -r8 -r7c -r7b -r7 -r6b -r6 -r5c -r5b -r5 "" )
317set( ANDROID_SUPPORTED_NDK_VERSIONS ${ANDROID_EXTRA_NDK_VERSIONS} -r9 -r8d -r8b -r8 -r7c "" )
318if(NOT DEFINED ANDROID_NDK_SEARCH_PATHS)
319 if( CMAKE_HOST_WIN32 )
320 file( TO_CMAKE_PATH "$ENV{PROGRAMFILES}" ANDROID_NDK_SEARCH_PATHS )
321 set( ANDROID_NDK_SEARCH_PATHS "${ANDROID_NDK_SEARCH_PATHS}/android-ndk" "$ENV{SystemDrive}/NVPACK/android-ndk" )
322 else()
323 file( TO_CMAKE_PATH "$ENV{HOME}" ANDROID_NDK_SEARCH_PATHS )
324 set( ANDROID_NDK_SEARCH_PATHS /opt/android-ndk "${ANDROID_NDK_SEARCH_PATHS}/NVPACK/android-ndk" )
325 endif()
326endif()
327if(NOT DEFINED ANDROID_STANDALONE_TOOLCHAIN_SEARCH_PATH)
328 set( ANDROID_STANDALONE_TOOLCHAIN_SEARCH_PATH /opt/android-toolchain )
329endif()
330
331set( ANDROID_SUPPORTED_ABIS_arm "armeabi-v7a;armeabi;armeabi-v7a with NEON;armeabi-v7a with VFPV3;armeabi-v6 with VFP" )
332set( ANDROID_SUPPORTED_ABIS_x86 "x86" )
333set( ANDROID_SUPPORTED_ABIS_mipsel "mips" )
334
335set( ANDROID_DEFAULT_NDK_API_LEVEL 8 )
336set( ANDROID_DEFAULT_NDK_API_LEVEL_x86 9 )
337set( ANDROID_DEFAULT_NDK_API_LEVEL_mips 9 )
338
339
340macro( __LIST_FILTER listvar regex )
341 if( ${listvar} )
342 foreach( __val ${${listvar}} )
343 if( __val MATCHES "${regex}" )
344 list( REMOVE_ITEM ${listvar} "${__val}" )
345 endif()
346 endforeach()
347 endif()
348endmacro()
349
350macro( __INIT_VARIABLE var_name )
351 set( __test_path 0 )
352 foreach( __var ${ARGN} )
353 if( __var STREQUAL "PATH" )
354 set( __test_path 1 )
355 break()
356 endif()
357 endforeach()
358 if( __test_path AND NOT EXISTS "${${var_name}}" )
359 unset( ${var_name} CACHE )
360 endif()
361 if( "${${var_name}}" STREQUAL "" )
362 set( __values 0 )
363 foreach( __var ${ARGN} )
364 if( __var STREQUAL "VALUES" )
365 set( __values 1 )
366 elseif( NOT __var STREQUAL "PATH" )
367 set( __obsolete 0 )
368 if( __var MATCHES "^OBSOLETE_.*$" )
369 string( REPLACE "OBSOLETE_" "" __var "${__var}" )
370 set( __obsolete 1 )
371 endif()
372 if( __var MATCHES "^ENV_.*$" )
373 string( REPLACE "ENV_" "" __var "${__var}" )
374 set( __value "$ENV{${__var}}" )
375 elseif( DEFINED ${__var} )
376 set( __value "${${__var}}" )
377 else()
378 if( __values )
379 set( __value "${__var}" )
380 else()
381 set( __value "" )
382 endif()
383 endif()
384 if( NOT "${__value}" STREQUAL "" )
385 if( __test_path )
386 if( EXISTS "${__value}" )
387 set( ${var_name} "${__value}" )
388 if( __obsolete )
389 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." )
390 endif()
391 break()
392 endif()
393 else()
394 set( ${var_name} "${__value}" )
395 if( __obsolete )
396 message( WARNING "Using value of obsolete variable ${__var} as initial value for ${var_name}. Please note, that ${__var} can be completely removed in future versions of the toolchain." )
397 endif()
398 break()
399 endif()
400 endif()
401 endif()
402 endforeach()
403 unset( __value )
404 unset( __values )
405 unset( __obsolete )
406 endif()
407 unset( __test_path )
408endmacro()
409
410macro( __DETECT_NATIVE_API_LEVEL _var _path )
411 SET( __ndkApiLevelRegex "^[\t ]*#define[\t ]+__ANDROID_API__[\t ]+([0-9]+)[\t ]*$" )
412 FILE( STRINGS ${_path} __apiFileContent REGEX "${__ndkApiLevelRegex}" )
413 if( NOT __apiFileContent )
414 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." )
415 endif()
416 string( REGEX REPLACE "${__ndkApiLevelRegex}" "\\1" ${_var} "${__apiFileContent}" )
417 unset( __apiFileContent )
418 unset( __ndkApiLevelRegex )
419endmacro()
420
421macro( __DETECT_TOOLCHAIN_MACHINE_NAME _var _root )
422 file( GLOB __gccExePath "${_root}/bin/*-gcc${TOOL_OS_SUFFIX}" )
423 __LIST_FILTER( __gccExePath "bin/[.].*-gcc${TOOL_OS_SUFFIX}$" )
424 list( LENGTH __gccExePath __gccExePathsCount )
425 if( NOT __gccExePathsCount EQUAL 1 )
426 message( WARNING "Could not uniquely determine machine name for compiler from ${_root}." )
427 set( ${_var} "" )
428 else()
429 get_filename_component( __gccExeName "${__gccExePath}" NAME_WE )
430 string( REPLACE "-gcc" "" ${_var} "${__gccExeName}" )
431 endif()
432 unset( __gccExePath )
433 unset( __gccExePathsCount )
434 unset( __gccExeName )
435endmacro()
436
437macro( __COPY_IF_DIFFERENT _source _destination )
438 execute_process( COMMAND "${CMAKE_COMMAND}" -E copy_if_different "${_source}" "${_destination}" RESULT_VARIABLE __fileCopyProcess )
439 if( NOT __fileCopyProcess EQUAL 0 OR NOT EXISTS "${_destination}")
440 message( SEND_ERROR "Failed copying of ${_source} to the ${_destination}" )
441 endif()
442 unset( __fileCopyProcess )
443endmacro()
444
445
446# stl version: by default gnustl_static will be used
447set( ANDROID_USE_STLPORT FALSE CACHE BOOL "Experimental: use stlport_static instead of gnustl_static")
448mark_as_advanced( ANDROID_USE_STLPORT )
449
450# fight against cygwin
451set( ANDROID_FORBID_SYGWIN TRUE CACHE BOOL "Prevent cmake from working under cygwin and using cygwin tools")
452mark_as_advanced( ANDROID_FORBID_SYGWIN )
453if( ANDROID_FORBID_SYGWIN )
454 if( CYGWIN )
455 message( FATAL_ERROR "Android NDK and android-cmake toolchain are not welcome Cygwin. It is unlikely that this cmake toolchain will work under cygwin. But if you want to try then you can set cmake variable ANDROID_FORBID_SYGWIN to FALSE and rerun cmake." )
456 endif()
457
458 if( CMAKE_HOST_WIN32 )
459 # remove cygwin from PATH
460 set( __new_path "$ENV{PATH}")
461 __LIST_FILTER( __new_path "cygwin" )
462 set(ENV{PATH} "${__new_path}")
463 unset(__new_path)
464 endif()
465endif()
466
467# detect current host platform
468set( TOOL_OS_SUFFIX "" )
469if( CMAKE_HOST_APPLE )
470 set( ANDROID_NDK_HOST_SYSTEM_NAME "darwin-x86" )
471elseif( CMAKE_HOST_WIN32 )
472 set( ANDROID_NDK_HOST_SYSTEM_NAME "windows" )
473 set( TOOL_OS_SUFFIX ".exe" )
474elseif( CMAKE_HOST_UNIX )
475 set( ANDROID_NDK_HOST_SYSTEM_NAME "linux-x86" )
476else()
477 message( FATAL_ERROR "Cross-compilation on your platform is not supported by this cmake toolchain" )
478endif()
479
480# see if we have path to Android NDK
481# but only if the user hasn't tried to provide a standalone toolchain as an override.
482if( NOT ANDROID_STANDALONE_TOOLCHAIN )
483 __INIT_VARIABLE( ANDROID_NDK PATH ENV_ANDROID_NDK )
484 # According to a Google engineer on the Android NDK mailing list, the semi-official/blessed environmental variable is ANDROID_NDK_ROOT, not ANDROID_NDK.
485 if ( NOT ANDROID_NDK )
486 __INIT_VARIABLE( ANDROID_NDK PATH ENV_ANDROID_NDK_ROOT )
487 endif( NOT ANDROID_NDK )
488endif( NOT ANDROID_STANDALONE_TOOLCHAIN )
489
490if( NOT ANDROID_NDK )
491 # see if we have path to Android standalone toolchain
492 __INIT_VARIABLE( ANDROID_STANDALONE_TOOLCHAIN PATH ENV_ANDROID_STANDALONE_TOOLCHAIN OBSOLETE_ANDROID_NDK_TOOLCHAIN_ROOT OBSOLETE_ENV_ANDROID_NDK_TOOLCHAIN_ROOT )
493
494 if( NOT ANDROID_STANDALONE_TOOLCHAIN )
495 #try to find Android NDK in one of the the default locations
496 set( __ndkSearchPaths )
497 foreach( __ndkSearchPath ${ANDROID_NDK_SEARCH_PATHS} )
498 foreach( suffix ${ANDROID_SUPPORTED_NDK_VERSIONS} )
499 list( APPEND __ndkSearchPaths "${__ndkSearchPath}${suffix}" )
500 endforeach()
501 endforeach()
502 __INIT_VARIABLE( ANDROID_NDK PATH VALUES ${__ndkSearchPaths} )
503 unset( __ndkSearchPaths )
504
505 if( ANDROID_NDK )
506 message( STATUS "Using default path for Android NDK: ${ANDROID_NDK}" )
507 message( STATUS " If you prefer to use a different location, please define a cmake or environment variable: ANDROID_NDK" )
508 else()
509 #try to find Android standalone toolchain in one of the the default locations
510 __INIT_VARIABLE( ANDROID_STANDALONE_TOOLCHAIN PATH ANDROID_STANDALONE_TOOLCHAIN_SEARCH_PATH )
511
512 if( ANDROID_STANDALONE_TOOLCHAIN )
513 message( STATUS "Using default path for standalone toolchain ${ANDROID_STANDALONE_TOOLCHAIN}" )
514 message( STATUS " If you prefer to use a different location, please define the variable: ANDROID_STANDALONE_TOOLCHAIN" )
515 endif( ANDROID_STANDALONE_TOOLCHAIN )
516 endif( ANDROID_NDK )
517 endif( NOT ANDROID_STANDALONE_TOOLCHAIN )
518endif( NOT ANDROID_NDK )
519
520# remember found paths
521if( ANDROID_NDK )
522 get_filename_component( ANDROID_NDK "${ANDROID_NDK}" ABSOLUTE )
523 # try to detect change
524 if( CMAKE_AR )
525 string( LENGTH "${ANDROID_NDK}" __length )
526 string( SUBSTRING "${CMAKE_AR}" 0 ${__length} __androidNdkPreviousPath )
527 if( NOT __androidNdkPreviousPath STREQUAL ANDROID_NDK )
528 message( FATAL_ERROR "It is not possible to change path to the NDK on subsequent run." )
529 endif()
530 unset( __androidNdkPreviousPath )
531 unset( __length )
532 endif()
533 set( ANDROID_NDK "${ANDROID_NDK}" CACHE INTERNAL "Path of the Android NDK" )
534 set( BUILD_WITH_ANDROID_NDK True )
535elseif( ANDROID_STANDALONE_TOOLCHAIN )
536 get_filename_component( ANDROID_STANDALONE_TOOLCHAIN "${ANDROID_STANDALONE_TOOLCHAIN}" ABSOLUTE )
537 # try to detect change
538 if( CMAKE_AR )
539 string( LENGTH "${ANDROID_STANDALONE_TOOLCHAIN}" __length )
540 string( SUBSTRING "${CMAKE_AR}" 0 ${__length} __androidStandaloneToolchainPreviousPath )
541 if( NOT __androidStandaloneToolchainPreviousPath STREQUAL ANDROID_STANDALONE_TOOLCHAIN )
542 message( FATAL_ERROR "It is not possible to change path to the Android standalone toolchain on subsequent run." )
543 endif()
544 unset( __androidStandaloneToolchainPreviousPath )
545 unset( __length )
546 endif()
547 set( ANDROID_STANDALONE_TOOLCHAIN "${ANDROID_STANDALONE_TOOLCHAIN}" CACHE INTERNAL "Path of the Android standalone toolchain" )
548 set( BUILD_WITH_STANDALONE_TOOLCHAIN True )
549else()
550 list(GET ANDROID_NDK_SEARCH_PATHS 0 ANDROID_NDK_SEARCH_PATH)
551 message( FATAL_ERROR "Could not find neither Android NDK nor Android standalone toolcahin.
552 You should either set an environment variable:
553 export ANDROID_NDK=~/my-android-ndk
554 or
555 export ANDROID_STANDALONE_TOOLCHAIN=~/my-android-toolchain
556 or put the toolchain or NDK in the default path:
557 sudo ln -s ~/my-android-ndk ${ANDROID_NDK_SEARCH_PATH}
558 sudo ln -s ~/my-android-toolchain ${ANDROID_STANDALONE_TOOLCHAIN_SEARCH_PATH}" )
559endif()
560
561# get all the details about standalone toolchain
562if( BUILD_WITH_STANDALONE_TOOLCHAIN )
563 __DETECT_NATIVE_API_LEVEL( ANDROID_SUPPORTED_NATIVE_API_LEVELS "${ANDROID_STANDALONE_TOOLCHAIN}/sysroot/usr/include/android/api-level.h" )
564 set( ANDROID_STANDALONE_TOOLCHAIN_API_LEVEL ${ANDROID_SUPPORTED_NATIVE_API_LEVELS} )
565 set( __availableToolchains "standalone" )
566 __DETECT_TOOLCHAIN_MACHINE_NAME( __availableToolchainMachines "${ANDROID_STANDALONE_TOOLCHAIN}" )
567 if( NOT __availableToolchainMachines )
568 message( FATAL_ERROR "Could not determine machine name of your toolchain. Probably your Android standalone toolchain is broken." )
569 endif()
570 if( __availableToolchainMachines MATCHES i686 )
571 set( __availableToolchainArchs "x86" )
572 elseif( __availableToolchainMachines MATCHES arm )
573 set( __availableToolchainArchs "arm" )
574 elseif( __availableToolchainMachines MATCHES mipsel )
575 set( __availableToolchainArchs "mipsel" )
576 endif()
577 if( ANDROID_COMPILER_VERSION )
578 # do not run gcc every time because it is relatevely expencive
579 set( __availableToolchainCompilerVersions "${ANDROID_COMPILER_VERSION}" )
580 else()
581 execute_process( COMMAND "${ANDROID_STANDALONE_TOOLCHAIN}/bin/${__availableToolchainMachines}-gcc${TOOL_OS_SUFFIX}" --version
582 OUTPUT_VARIABLE __availableToolchainCompilerVersions OUTPUT_STRIP_TRAILING_WHITESPACE )
583 # arm-linux-androideabi-gcc (GCC) 4.6 20120106 (prerelease)
584 string( REGEX MATCH "[0-9]+.[0-9]+.[0-9]+" __availableToolchainCompilerVersions "${__availableToolchainCompilerVersions}" )
585 if( NOT __availableToolchainCompilerVersions )
586 # arm-linux-androideabi-gcc (GCC) 4.8
587 execute_process( COMMAND "${ANDROID_STANDALONE_TOOLCHAIN}/bin/${__availableToolchainMachines}-gcc${TOOL_OS_SUFFIX}" --version
588 OUTPUT_VARIABLE __availableToolchainCompilerVersions OUTPUT_STRIP_TRAILING_WHITESPACE )
589 string( REGEX MATCH "[0-9]+.[0-9]+" __availableToolchainCompilerVersions "${__availableToolchainCompilerVersions}" )
590 endif()
591 endif()
592endif()
593
594# get all the details about NDK
595if( BUILD_WITH_ANDROID_NDK )
596 file( GLOB ANDROID_SUPPORTED_NATIVE_API_LEVELS RELATIVE "${ANDROID_NDK}/platforms" "${ANDROID_NDK}/platforms/android-*" )
597 string( REPLACE "android-" "" ANDROID_SUPPORTED_NATIVE_API_LEVELS "${ANDROID_SUPPORTED_NATIVE_API_LEVELS}" )
598 file( GLOB __availableToolchains RELATIVE "${ANDROID_NDK}/toolchains" "${ANDROID_NDK}/toolchains/*" )
599 __LIST_FILTER( __availableToolchains "^[.]" )
600 set( __availableToolchainMachines "" )
601 set( __availableToolchainArchs "" )
602 set( __availableToolchainCompilerVersions "" )
603 foreach( __toolchain ${__availableToolchains} )
604 __DETECT_TOOLCHAIN_MACHINE_NAME( __machine "${ANDROID_NDK}/toolchains/${__toolchain}/prebuilt/${ANDROID_NDK_HOST_SYSTEM_NAME}" )
605 if( __machine )
606 string( REGEX MATCH "[0-9]+[.][0-9]+[.]*[0-9]*$" __version "${__toolchain}" )
607 string( REGEX MATCH "^[^-]+" __arch "${__toolchain}" )
608 list( APPEND __availableToolchainMachines "${__machine}" )
609 list( APPEND __availableToolchainArchs "${__arch}" )
610 list( APPEND __availableToolchainCompilerVersions "${__version}" )
611 else()
612 list( REMOVE_ITEM __availableToolchains "${__toolchain}" )
613 endif()
614 endforeach()
615 if( NOT __availableToolchains )
616 message( FATAL_ERROR "Could not any working toolchain in the NDK. Probably your Android NDK is broken." )
617 endif()
618endif()
619
620# build list of available ABIs
621if( NOT ANDROID_SUPPORTED_ABIS )
622 set( ANDROID_SUPPORTED_ABIS "" )
623 set( __uniqToolchainArchNames ${__availableToolchainArchs} )
624 list( REMOVE_DUPLICATES __uniqToolchainArchNames )
625 list( SORT __uniqToolchainArchNames )
626 foreach( __arch ${__uniqToolchainArchNames} )
627 list( APPEND ANDROID_SUPPORTED_ABIS ${ANDROID_SUPPORTED_ABIS_${__arch}} )
628 endforeach()
629 unset( __uniqToolchainArchNames )
630 if( NOT ANDROID_SUPPORTED_ABIS )
631 message( FATAL_ERROR "No one of known Android ABIs is supported by this cmake toolchain." )
632 endif()
633endif()
634
635# choose target ABI
636__INIT_VARIABLE( ANDROID_ABI OBSOLETE_ARM_TARGET OBSOLETE_ARM_TARGETS VALUES ${ANDROID_SUPPORTED_ABIS} )
637# verify that target ABI is supported
638list( FIND ANDROID_SUPPORTED_ABIS "${ANDROID_ABI}" __androidAbiIdx )
639if( __androidAbiIdx EQUAL -1 )
640 string( REPLACE ";" "\", \"", PRINTABLE_ANDROID_SUPPORTED_ABIS "${ANDROID_SUPPORTED_ABIS}" )
641 message( FATAL_ERROR "Specified ANDROID_ABI = \"${ANDROID_ABI}\" is not supported by this cmake toolchain or your NDK/toolchain.
642 Supported values are: \"${PRINTABLE_ANDROID_SUPPORTED_ABIS}\"
643 " )
644endif()
645unset( __androidAbiIdx )
646
647# remember target ABI
648set( ANDROID_ABI "${ANDROID_ABI}" CACHE STRING "The target ABI for Android. If arm, then armeabi-v7a is recommended for hardware floating point." FORCE )
649
650# set target ABI options
651if( ANDROID_ABI STREQUAL "x86" )
652 set( X86 true )
653 set( ANDROID_NDK_ABI_NAME "x86" )
654 set( ANDROID_ARCH_NAME "x86" )
655 set( ANDROID_ARCH_FULLNAME "x86" )
656 set( CMAKE_SYSTEM_PROCESSOR "i686" )
657elseif( ANDROID_ABI STREQUAL "mips" )
658 set( MIPS true )
659 set( ANDROID_NDK_ABI_NAME "mips" )
660 set( ANDROID_ARCH_NAME "mips" )
661 set( ANDROID_ARCH_FULLNAME "mipsel" )
662 set( CMAKE_SYSTEM_PROCESSOR "mips" )
663elseif( ANDROID_ABI STREQUAL "armeabi" )
664 set( ARMEABI true )
665 set( ANDROID_NDK_ABI_NAME "armeabi" )
666 set( ANDROID_ARCH_NAME "arm" )
667 set( ANDROID_ARCH_FULLNAME "arm" )
668 set( CMAKE_SYSTEM_PROCESSOR "armv5te" )
669elseif( ANDROID_ABI STREQUAL "armeabi-v6 with VFP" )
670 set( ARMEABI_V6 true )
671 set( ANDROID_NDK_ABI_NAME "armeabi" )
672 set( ANDROID_ARCH_NAME "arm" )
673 set( ANDROID_ARCH_FULLNAME "arm" )
674 set( CMAKE_SYSTEM_PROCESSOR "armv6" )
675 # need always fallback to older platform
676 set( ARMEABI true )
677elseif( ANDROID_ABI STREQUAL "armeabi-v7a")
678 set( ARMEABI_V7A true )
679 set( ANDROID_NDK_ABI_NAME "armeabi-v7a" )
680 set( ANDROID_ARCH_NAME "arm" )
681 set( ANDROID_ARCH_FULLNAME "arm" )
682 set( CMAKE_SYSTEM_PROCESSOR "armv7-a" )
683elseif( ANDROID_ABI STREQUAL "armeabi-v7a with VFPV3" )
684 set( ARMEABI_V7A true )
685 set( ANDROID_NDK_ABI_NAME "armeabi-v7a" )
686 set( ANDROID_ARCH_NAME "arm" )
687 set( ANDROID_ARCH_FULLNAME "arm" )
688 set( CMAKE_SYSTEM_PROCESSOR "armv7-a" )
689 set( VFPV3 true )
690elseif( ANDROID_ABI STREQUAL "armeabi-v7a with NEON" )
691 set( ARMEABI_V7A true )
692 set( ANDROID_NDK_ABI_NAME "armeabi-v7a" )
693 set( ANDROID_ARCH_NAME "arm" )
694 set( ANDROID_ARCH_FULLNAME "arm" )
695 set( CMAKE_SYSTEM_PROCESSOR "armv7-a" )
696 set( VFPV3 true )
697 set( NEON true )
698else()
699 message( SEND_ERROR "Unknown ANDROID_ABI=\"${ANDROID_ABI}\" is specified." )
700endif()
701
702if( CMAKE_BINARY_DIR AND EXISTS "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeSystem.cmake" )
703 # really dirty hack
704 # it is not possible to change CMAKE_SYSTEM_PROCESSOR after the first run...
705 file( APPEND "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeSystem.cmake" "SET(CMAKE_SYSTEM_PROCESSOR \"${CMAKE_SYSTEM_PROCESSOR}\")\n" )
706endif()
707
708set( ANDROID_SUPPORTED_ABIS ${ANDROID_SUPPORTED_ABIS_${ANDROID_ARCH_FULLNAME}} CACHE INTERNAL "ANDROID_ABI can be changed only to one of these ABIs. Changing to any other ABI requires to reset cmake cache." )
709if( CMAKE_VERSION VERSION_GREATER "2.8" )
710 list( SORT ANDROID_SUPPORTED_ABIS_${ANDROID_ARCH_FULLNAME} )
711 set_property( CACHE ANDROID_ABI PROPERTY STRINGS ${ANDROID_SUPPORTED_ABIS_${ANDROID_ARCH_FULLNAME}} )
712endif()
713
714if( ANDROID_ARCH_NAME STREQUAL "arm" AND NOT ARMEABI_V6 )
715 __INIT_VARIABLE( ANDROID_FORCE_ARM_BUILD OBSOLETE_FORCE_ARM VALUES OFF )
716 set( ANDROID_FORCE_ARM_BUILD ${ANDROID_FORCE_ARM_BUILD} CACHE BOOL "Use 32-bit ARM instructions instead of Thumb-1" FORCE )
717 mark_as_advanced( ANDROID_FORCE_ARM_BUILD )
718else()
719 unset( ANDROID_FORCE_ARM_BUILD CACHE )
720endif()
721
722# choose toolchain
723if( ANDROID_TOOLCHAIN_NAME )
724 list( FIND __availableToolchains "${ANDROID_TOOLCHAIN_NAME}" __toolchainIdx )
725 if( __toolchainIdx EQUAL -1 )
726 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" )
727 endif()
728 list( GET __availableToolchainArchs ${__toolchainIdx} __toolchainArch )
729 if( NOT __toolchainArch STREQUAL ANDROID_ARCH_FULLNAME )
730 message( SEND_ERROR "Previously selected toolchain \"${ANDROID_TOOLCHAIN_NAME}\" is not able to compile binaries for the \"${ANDROID_ARCH_NAME}\" platform." )
731 endif()
732else()
733 set( __toolchainIdx -1 )
734 set( __applicableToolchains "" )
735 set( __toolchainMaxVersion "0.0.0" )
736 list( LENGTH __availableToolchains __availableToolchainsCount )
737 math( EXPR __availableToolchainsCount "${__availableToolchainsCount}-1" )
738 foreach( __idx RANGE ${__availableToolchainsCount} )
739 list( GET __availableToolchainArchs ${__idx} __toolchainArch )
740 if( __toolchainArch STREQUAL ANDROID_ARCH_FULLNAME )
741 list( GET __availableToolchainCompilerVersions ${__idx} __toolchainVersion )
742 if( __toolchainVersion VERSION_GREATER __toolchainMaxVersion )
743 set( __toolchainMaxVersion "${__toolchainVersion}" )
744 set( __toolchainIdx ${__idx} )
745 endif()
746 endif()
747 endforeach()
748 unset( __availableToolchainsCount )
749 unset( __toolchainMaxVersion )
750 unset( __toolchainVersion )
751endif()
752unset( __toolchainArch )
753if( __toolchainIdx EQUAL -1 )
754 message( FATAL_ERROR "No one of available compiler toolchains is able to compile for ${ANDROID_ARCH_NAME} platform." )
755endif()
756list( GET __availableToolchains ${__toolchainIdx} ANDROID_TOOLCHAIN_NAME )
757list( GET __availableToolchainMachines ${__toolchainIdx} ANDROID_TOOLCHAIN_MACHINE_NAME )
758list( GET __availableToolchainCompilerVersions ${__toolchainIdx} ANDROID_COMPILER_VERSION )
759set( ANDROID_TOOLCHAIN_NAME "${ANDROID_TOOLCHAIN_NAME}" CACHE INTERNAL "Name of toolchain used" )
760set( ANDROID_COMPILER_VERSION "${ANDROID_COMPILER_VERSION}" CACHE INTERNAL "compiler version from selected toolchain" )
761unset( __toolchainIdx )
762unset( __availableToolchains )
763unset( __availableToolchainMachines )
764unset( __availableToolchainArchs )
765unset( __availableToolchainCompilerVersions )
766
767# choose native API level
768__INIT_VARIABLE( ANDROID_NATIVE_API_LEVEL ENV_ANDROID_NATIVE_API_LEVEL ANDROID_API_LEVEL ENV_ANDROID_API_LEVEL ANDROID_STANDALONE_TOOLCHAIN_API_LEVEL ANDROID_DEFAULT_NDK_API_LEVEL_${ANDROID_ARCH_NAME} ANDROID_DEFAULT_NDK_API_LEVEL )
769string( REGEX MATCH "[0-9]+" ANDROID_NATIVE_API_LEVEL "${ANDROID_NATIVE_API_LEVEL}" )
770# validate
771list( FIND ANDROID_SUPPORTED_NATIVE_API_LEVELS "${ANDROID_NATIVE_API_LEVEL}" __levelIdx )
772if( __levelIdx EQUAL -1 )
773 message( SEND_ERROR "Specified Android native API level (${ANDROID_NATIVE_API_LEVEL}) is not supported by your NDK/toolchain." )
774endif()
775unset( __levelIdx )
776if( BUILD_WITH_ANDROID_NDK )
777 __DETECT_NATIVE_API_LEVEL( __realApiLevel "${ANDROID_NDK}/platforms/android-${ANDROID_NATIVE_API_LEVEL}/arch-${ANDROID_ARCH_NAME}/usr/include/android/api-level.h" )
778 if( NOT __realApiLevel EQUAL ANDROID_NATIVE_API_LEVEL )
779 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." )
780 endif()
781 unset( __realApiLevel )
782endif()
783set( ANDROID_NATIVE_API_LEVEL "${ANDROID_NATIVE_API_LEVEL}" CACHE STRING "Android API level for native code" FORCE )
784if( CMAKE_VERSION VERSION_GREATER "2.8" )
785 list( SORT ANDROID_SUPPORTED_NATIVE_API_LEVELS )
786 set_property( CACHE ANDROID_NATIVE_API_LEVEL PROPERTY STRINGS ${ANDROID_SUPPORTED_NATIVE_API_LEVELS} )
787endif()
788
789# setup paths
790if( BUILD_WITH_STANDALONE_TOOLCHAIN )
791 set( ANDROID_TOOLCHAIN_ROOT "${ANDROID_STANDALONE_TOOLCHAIN}" )
792 set( ANDROID_SYSROOT "${ANDROID_STANDALONE_TOOLCHAIN}/sysroot" )
793 set( __stlLibPath "${ANDROID_STANDALONE_TOOLCHAIN}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib" )
794endif()
795if( BUILD_WITH_ANDROID_NDK )
796 set( ANDROID_TOOLCHAIN_ROOT "${ANDROID_NDK}/toolchains/${ANDROID_TOOLCHAIN_NAME}/prebuilt/${ANDROID_NDK_HOST_SYSTEM_NAME}" )
797 set( ANDROID_SYSROOT "${ANDROID_NDK}/platforms/android-${ANDROID_NATIVE_API_LEVEL}/arch-${ANDROID_ARCH_NAME}" )
798 if( ANDROID_USE_STLPORT )
799 set( __stlIncludePath "${ANDROID_NDK}/sources/cxx-stl/stlport/stlport" )
800 set( __stlLibPath "${ANDROID_NDK}/sources/cxx-stl/stlport/libs/${ANDROID_NDK_ABI_NAME}" )
801 else()
802 if( EXISTS "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/${ANDROID_COMPILER_VERSION}" )
803 set( __stlIncludePath "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/${ANDROID_COMPILER_VERSION}/include" )
804 set( __stlLibPath "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/${ANDROID_COMPILER_VERSION}/libs/${ANDROID_NDK_ABI_NAME}" )
805 else()
806 set( __stlIncludePath "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/include" )
807 set( __stlLibPath "${ANDROID_NDK}/sources/cxx-stl/gnu-libstdc++/libs/${ANDROID_NDK_ABI_NAME}" )
808 endif()
809 endif()
810endif()
811
812# specify the cross compiler
813set( CMAKE_C_COMPILER "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-gcc${TOOL_OS_SUFFIX}" CACHE PATH "gcc" )
814set( CMAKE_CXX_COMPILER "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-g++${TOOL_OS_SUFFIX}" CACHE PATH "g++" )
815set( CMAKE_ASM_COMPILER "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-gcc${TOOL_OS_SUFFIX}" CACHE PATH "Assembler" )
816if( CMAKE_VERSION VERSION_LESS 2.8.5 )
817 set( CMAKE_ASM_COMPILER_ARG1 "-c" )
818endif()
819# there may be a way to make cmake deduce these TODO deduce the rest of the tools
820set( CMAKE_STRIP "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-strip${TOOL_OS_SUFFIX}" CACHE PATH "strip" )
821set( CMAKE_AR "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-ar${TOOL_OS_SUFFIX}" CACHE PATH "archive" )
822set( CMAKE_LINKER "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-ld${TOOL_OS_SUFFIX}" CACHE PATH "linker" )
823set( CMAKE_NM "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-nm${TOOL_OS_SUFFIX}" CACHE PATH "nm" )
824set( CMAKE_OBJCOPY "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-objcopy${TOOL_OS_SUFFIX}" CACHE PATH "objcopy" )
825set( CMAKE_OBJDUMP "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-objdump${TOOL_OS_SUFFIX}" CACHE PATH "objdump" )
826set( CMAKE_RANLIB "${ANDROID_TOOLCHAIN_ROOT}/bin/${ANDROID_TOOLCHAIN_MACHINE_NAME}-ranlib${TOOL_OS_SUFFIX}" CACHE PATH "ranlib" )
827set( _CMAKE_TOOLCHAIN_PREFIX "${ANDROID_TOOLCHAIN_MACHINE_NAME}-" )
828if( APPLE )
829 find_program( CMAKE_INSTALL_NAME_TOOL NAMES install_name_tool )
830 if( NOT CMAKE_INSTALL_NAME_TOOL )
831 message( FATAL_ERROR "Could not find install_name_tool, please check your installation." )
832 endif()
833 mark_as_advanced( CMAKE_INSTALL_NAME_TOOL )
834endif()
835
836# export directories
837set( ANDROID_SYSTEM_INCLUDE_DIRS "" )
838set( ANDROID_SYSTEM_LIB_DIRS "" )
839
840# setup output directories
841set( LIBRARY_OUTPUT_PATH_ROOT ${CMAKE_SOURCE_DIR} CACHE PATH "root for library output, set this to change where android libs are installed to" )
842set( CMAKE_INSTALL_PREFIX "${ANDROID_TOOLCHAIN_ROOT}/user" CACHE STRING "path for installing" )
843
844if(NOT _CMAKE_IN_TRY_COMPILE)
845 if( EXISTS "${CMAKE_SOURCE_DIR}/jni/CMakeLists.txt" )
846 set( EXECUTABLE_OUTPUT_PATH "${LIBRARY_OUTPUT_PATH_ROOT}/bin/${ANDROID_NDK_ABI_NAME}" CACHE PATH "Output directory for applications" )
847 else()
848 set( EXECUTABLE_OUTPUT_PATH "${LIBRARY_OUTPUT_PATH_ROOT}/bin" CACHE PATH "Output directory for applications" )
849 endif()
850 set( LIBRARY_OUTPUT_PATH "${LIBRARY_OUTPUT_PATH_ROOT}/libs/${ANDROID_NDK_ABI_NAME}" CACHE PATH "path for android libs" )
851endif()
852
853# includes
854list( APPEND ANDROID_SYSTEM_INCLUDE_DIRS "${ANDROID_SYSROOT}/usr/include" )
855if( __stlIncludePath AND EXISTS "${__stlIncludePath}" )
856 list( APPEND ANDROID_SYSTEM_INCLUDE_DIRS "${__stlIncludePath}" )
857endif()
858
859# c++ bits includes
860if( __stlLibPath AND EXISTS "${__stlLibPath}/include" )
861 list( APPEND ANDROID_SYSTEM_INCLUDE_DIRS "${__stlLibPath}/include" )
862endif()
863if( ANDROID_ARCH_NAME STREQUAL "arm" AND EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/${CMAKE_SYSTEM_PROCESSOR}/thumb/bits" )
864 list( APPEND ANDROID_SYSTEM_INCLUDE_DIRS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/${CMAKE_SYSTEM_PROCESSOR}/thumb" )
865elseif( EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/${CMAKE_SYSTEM_PROCESSOR}/bits" )
866 list( APPEND ANDROID_SYSTEM_INCLUDE_DIRS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/${CMAKE_SYSTEM_PROCESSOR}" )
867elseif( ANDROID_ARCH_NAME STREQUAL "arm" AND EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/thumb/bits" )
868 list( APPEND ANDROID_SYSTEM_INCLUDE_DIRS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/thumb" )
869elseif( EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/bits" )
870 list( APPEND ANDROID_SYSTEM_INCLUDE_DIRS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/include/c++/${ANDROID_COMPILER_VERSION}/${ANDROID_TOOLCHAIN_MACHINE_NAME}" )
871endif()
872
873# flags and definitions
874if(ANDROID_SYSROOT MATCHES "[ ;\"]")
875 set( ANDROID_C_FLAGS "--sysroot=\"${ANDROID_SYSROOT}\"" )
876 set( ANDROID_CXX_FLAGS "--sysroot=\"${ANDROID_SYSROOT}\"" )
877 # quotes will break try_compile and compiler identification
878 message(WARNING "Your Android system root has non-alphanumeric symbols. It can break compiler features detection and the whole build.")
879else()
880 set( ANDROID_C_FLAGS "--sysroot=${ANDROID_SYSROOT}" )
881 set( ANDROID_CXX_FLAGS "--sysroot=${ANDROID_SYSROOT}" )
882endif()
883
884remove_definitions( -DANDROID )
885add_definitions( -DANDROID )
886
887# Force set compilers because standard identification works badly for us
888include( CMakeForceCompiler )
889CMAKE_FORCE_C_COMPILER( "${CMAKE_C_COMPILER}" GNU )
890set( CMAKE_C_PLATFORM_ID Linux )
891set( CMAKE_C_SIZEOF_DATA_PTR 4 )
892set( CMAKE_C_HAS_ISYSROOT 1 )
893set( CMAKE_C_COMPILER_ABI ELF )
894CMAKE_FORCE_CXX_COMPILER( "${CMAKE_CXX_COMPILER}" GNU )
895set( CMAKE_CXX_PLATFORM_ID Linux )
896set( CMAKE_CXX_SIZEOF_DATA_PTR 4 )
897set( CMAKE_CXX_HAS_ISYSROOT 1 )
898set( CMAKE_CXX_COMPILER_ABI ELF )
899# force ASM compiler (required for CMake < 2.8.5)
900set( CMAKE_ASM_COMPILER_ID_RUN TRUE )
901set( CMAKE_ASM_COMPILER_ID GNU )
902set( CMAKE_ASM_COMPILER_WORKS TRUE )
903set( CMAKE_ASM_COMPILER_FORCED TRUE )
904set( CMAKE_COMPILER_IS_GNUASM 1)
905
906# NDK flags
907if( ARMEABI OR ARMEABI_V7A )
908 # NDK also defines -ffunction-sections -funwind-tables but they result in worse OpenCV performance
909 set( _CMAKE_CXX_FLAGS "-fpic -fstack-protector -no-canonical-prefixes -Wa,--noexecstack" )
910 set( _CMAKE_C_FLAGS "-fpic -fstack-protector -no-canonical-prefixes -Wa,--noexecstack" )
911 remove_definitions( -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ )
912 add_definitions( -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ )
913 # extra arm-specific flags
914 # The default Android build process does not pass -fsigned-char.
915 # set( ANDROID_C_FLAGS "${ANDROID_C_FLAGS} -fsigned-char" )
916 # set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -fsigned-char" )
917elseif( X86 )
918 set( _CMAKE_CXX_FLAGS "-no-canonical-prefixes -funwind-tables -fstack-protector -Wa,--noexecstack" )
919 set( _CMAKE_C_FLAGS "-no-canonical-prefixes -funwind-tables -fstack-protector -Wa,--noexecstack" )
920elseif( MIPS )
921 set( _CMAKE_CXX_FLAGS "-fpic -Wno-psabi -fno-strict-aliasing -finline-functions -ffunction-sections -funwind-tables -fmessage-length=0 -fno-inline-functions-called-once -fgcse-after-reload -frerun-cse-after-loop -frename-registers" )
922 set( _CMAKE_C_FLAGS "-fpic -Wno-psabi -fno-strict-aliasing -finline-functions -ffunction-sections -funwind-tables -fmessage-length=0 -fno-inline-functions-called-once -fgcse-after-reload -frerun-cse-after-loop -frename-registers" )
923 # The default Android build process does not pass -fsigned-char.
924 # set( ANDROID_C_FLAGS "${ANDROID_C_FLAGS} -fsigned-char" )
925 # set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -fsigned-char" )
926else()
927 set( _CMAKE_CXX_FLAGS "" )
928 set( _CMAKE_C_FLAGS "" )
929endif()
930
931if( ANDROID_USE_STLPORT )
932 set( _CMAKE_CXX_FLAGS "${_CMAKE_CXX_FLAGS} -fno-rtti -fno-exceptions" )
933 # set( _CMAKE_C_FLAGS "${_CMAKE_C_FLAGS}" )
934else()
935 set( _CMAKE_CXX_FLAGS "${_CMAKE_CXX_FLAGS} -frtti -fexceptions" )
936 # set( _CMAKE_C_FLAGS "${_CMAKE_C_FLAGS}" )
937endif()
938
939# release and debug flags
940if( ARMEABI OR ARMEABI_V7A )
941 if( NOT ANDROID_FORCE_ARM_BUILD AND NOT ARMEABI_V6 )
942 # It is recommended to use the -mthumb compiler flag to force the generation
943 # of 16-bit Thumb-1 instructions (the default being 32-bit ARM ones).
944 # O3 instead of O2/Os in release mode - like cmake sets for desktop gcc
945 # EW: Note that Android's normal build process uses
946 # -mthumb -Os -g -DNDEBUG -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64
947 # and for debug, appends: -O0 -UNDEBUG -marm -fno-omit-frame-pointer
948 set( _CMAKE_CXX_FLAGS_RELEASE "-mthumb -O3 -finline-limit=64" )
949 set( _CMAKE_C_FLAGS_RELEASE "-mthumb -O3 -finline-limit=64" )
950 set( _CMAKE_CXX_FLAGS_DEBUG "-marm -O0 -g -finline-limit=64" )
951 set( _CMAKE_C_FLAGS_DEBUG "-marm -O0 -g -finline-limit=64" )
952 else()
953 # always compile ARMEABI_V6 in arm mode; otherwise there is no difference from ARMEABI
954 # O3 instead of O2/Os in release mode - like cmake sets for desktop gcc
955 set( _CMAKE_CXX_FLAGS_RELEASE "-marm -O3 -fstrict-aliasing" )
956 set( _CMAKE_C_FLAGS_RELEASE "-marm -O3 -fstrict-aliasing" )
957 set( _CMAKE_CXX_FLAGS_DEBUG "-marm -O0 -finline-limit=300" )
958 set( _CMAKE_C_FLAGS_DEBUG "-marm -O0 -finline-limit=300" )
959 endif()
960elseif( X86 )
961 set( _CMAKE_CXX_FLAGS_RELEASE "-O3 -funswitch-loops -finline-limit=300" )
962 set( _CMAKE_C_FLAGS_RELEASE "-O3 -funswitch-loops -finline-limit=300" )
963 set( _CMAKE_CXX_FLAGS_DEBUG "-O0 -g -funswitch-loops -finline-limit=300" )
964 set( _CMAKE_C_FLAGS_DEBUG "-O0 -g -funswitch-loops -finline-limit=300" )
965elseif( MIPS )
966 set( _CMAKE_CXX_FLAGS_RELEASE "-O3 -funswitch-loops -finline-limit=300" )
967 set( _CMAKE_C_FLAGS_RELEASE "-O3 -funswitch-loops -finline-limit=300" )
968 set( _CMAKE_CXX_FLAGS_DEBUG "-O0 -g" )
969 set( _CMAKE_C_FLAGS_DEBUG "-O0 -g" )
970endif()
971set( _CMAKE_CXX_FLAGS_RELEASE "${_CMAKE_CXX_FLAGS_RELEASE} -fomit-frame-pointer -DNDEBUG" )
972set( _CMAKE_C_FLAGS_RELEASE "${_CMAKE_C_FLAGS_RELEASE} -fomit-frame-pointer -DNDEBUG" )
973set( _CMAKE_CXX_FLAGS_DEBUG "${_CMAKE_CXX_FLAGS_DEBUG} -fno-strict-aliasing -fno-omit-frame-pointer -DDEBUG -D_DEBUG" )
974set( _CMAKE_C_FLAGS_DEBUG "${_CMAKE_C_FLAGS_DEBUG} -fno-strict-aliasing -fno-omit-frame-pointer -DDEBUG -D_DEBUG" )
975
976# ABI-specific flags
977if( ARMEABI_V7A )
978 set( ANDROID_C_FLAGS "${ANDROID_C_FLAGS} -march=armv7-a -mfloat-abi=softfp" )
979 set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -march=armv7-a -mfloat-abi=softfp" )
980 if( NEON )
981 set( ANDROID_C_FLAGS "${ANDROID_C_FLAGS} -mfpu=neon" )
982 set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -mfpu=neon" )
983 elseif( VFPV3 )
984 set( ANDROID_C_FLAGS "${ANDROID_C_FLAGS} -mfpu=vfpv3-d32" )
985 set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -mfpu=vfpv3-d32" )
986 else()
987 # Default Android armv7 builds with -mfpu=vfpv3-d16.
988 # According to this:
989 # http://stackoverflow.com/questions/11831648/android-ndk-arm-build-settings-to-run-on-most-devices
990 # there was a bug in r7b which caused crashes.
991 # But r9 is the current as of this writing so developers really need to upgrade their ndk.
992 set( ANDROID_C_FLAGS "${ANDROID_C_FLAGS} -mfpu=vfpv3-d16" )
993 set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -mfpu=vfpv3-d16" )
994 endif()
995elseif( ARMEABI_V6 )
996 set( ANDROID_C_FLAGS "${ANDROID_C_FLAGS} -march=armv6 -mfloat-abi=softfp -mfpu=vfp" )
997 set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -march=armv6 -mfloat-abi=softfp -mfpu=vfp" )
998elseif( ARMEABI )
999 set( ANDROID_C_FLAGS "${ANDROID_C_FLAGS} -march=armv5te -mtune=xscale -msoft-float" )
1000 set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -march=armv5te -mtune=xscale -msoft-float" )
1001elseif( X86 )
1002 set( ANDROID_C_FLAGS "${ANDROID_C_FLAGS}" )#sse?
1003 set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS}" )#sse?
1004endif()
1005
1006# linker flags
1007if( NOT DEFINED __ndklibspath )
1008 set( __ndklibspath "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/ndklibs/${ANDROID_NDK_ABI_NAME}" )
1009endif()
1010list( APPEND ANDROID_SYSTEM_LIB_DIRS "${CMAKE_INSTALL_PREFIX}/libs/${ANDROID_NDK_ABI_NAME}" )
1011set( ANDROID_LINKER_FLAGS "" )
1012
1013# STL
1014if( ANDROID_USE_STLPORT )
1015 if( EXISTS "${__stlLibPath}/libstlport_static.a" )
1016 set( CMAKE_CXX_CREATE_SHARED_LIBRARY "<CMAKE_CXX_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <SONAME_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES> \"${__stlLibPath}/libstlport_static.a\"")
1017 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> \"${__stlLibPath}/libstlport_static.a\"")
1018 endif()
1019else( ANDROID_USE_STLPORT )
1020 if( EXISTS "${__stlLibPath}/libgnustl_static.a" )
1021 __COPY_IF_DIFFERENT( "${__stlLibPath}/libgnustl_static.a" "${__ndklibspath}/libstdc++.a" )
1022 elseif( ANDROID_ARCH_NAME STREQUAL "arm" AND EXISTS "${__stlLibPath}/${CMAKE_SYSTEM_PROCESSOR}/thumb/libstdc++.a" )
1023 __COPY_IF_DIFFERENT( "${__stlLibPath}/${CMAKE_SYSTEM_PROCESSOR}/thumb/libstdc++.a" "${__ndklibspath}/libstdc++.a" )
1024 elseif( ANDROID_ARCH_NAME STREQUAL "arm" AND EXISTS "${__stlLibPath}/${CMAKE_SYSTEM_PROCESSOR}/libstdc++.a" )
1025 __COPY_IF_DIFFERENT( "${__stlLibPath}/${CMAKE_SYSTEM_PROCESSOR}/libstdc++.a" "${__ndklibspath}/libstdc++.a" )
1026 elseif( ANDROID_ARCH_NAME STREQUAL "arm" AND EXISTS "${__stlLibPath}/thumb/libstdc++.a" )
1027 __COPY_IF_DIFFERENT( "${__stlLibPath}/thumb/libstdc++.a" "${__ndklibspath}/libstdc++.a" )
1028 elseif( EXISTS "${__stlLibPath}/libstdc++.a" )
1029 __COPY_IF_DIFFERENT( "${__stlLibPath}/libstdc++.a" "${__ndklibspath}/libstdc++.a" )
1030 endif()
1031 if( EXISTS "${__stlLibPath}/libsupc++.a" )
1032 __COPY_IF_DIFFERENT( "${__stlLibPath}/libsupc++.a" "${__ndklibspath}/libsupc++.a" )
1033 elseif( ANDROID_ARCH_NAME STREQUAL "arm" AND EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}/thumb/libsupc++.a" )
1034 __COPY_IF_DIFFERENT( "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}/thumb/libsupc++.a" "${__ndklibspath}/libsupc++.a" )
1035 elseif( ANDROID_ARCH_NAME STREQUAL "arm" AND EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}/libsupc++.a" )
1036 __COPY_IF_DIFFERENT( "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/${CMAKE_SYSTEM_PROCESSOR}/libsupc++.a" "${__ndklibspath}/libsupc++.a" )
1037 elseif( ANDROID_ARCH_NAME STREQUAL "arm" AND EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/thumb/libsupc++.a" )
1038 __COPY_IF_DIFFERENT( "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/thumb/libsupc++.a" "${__ndklibspath}/libsupc++.a" )
1039 elseif( EXISTS "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/libsupc++.a" )
1040 __COPY_IF_DIFFERENT( "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}/lib/libsupc++.a" "${__ndklibspath}/libsupc++.a" )
1041 endif()
1042 list( APPEND ANDROID_SYSTEM_LIB_DIRS "${__ndklibspath}" )
1043endif( ANDROID_USE_STLPORT )
1044
1045# cleanup for STL search
1046unset( __stlIncludePath )
1047unset( __stlLibPath )
1048
1049# other linker flags
1050__INIT_VARIABLE( ANDROID_NO_UNDEFINED OBSOLETE_NO_UNDEFINED VALUES ON )
1051set( ANDROID_NO_UNDEFINED ${ANDROID_NO_UNDEFINED} CACHE BOOL "Show all undefined symbols as linker errors" FORCE )
1052mark_as_advanced( ANDROID_NO_UNDEFINED )
1053if( ANDROID_NO_UNDEFINED )
1054 set( ANDROID_LINKER_FLAGS "-Wl,--no-undefined ${ANDROID_LINKER_FLAGS}" )
1055endif()
1056
1057if (ANDROID_NDK MATCHES "-r[56].?$")
1058 # 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.
1059 __INIT_VARIABLE( ANDROID_SO_UNDEFINED VALUES ON )
1060else()
1061 __INIT_VARIABLE( ANDROID_SO_UNDEFINED VALUES OFF )
1062endif()
1063
1064set( ANDROID_SO_UNDEFINED ${ANDROID_SO_UNDEFINED} CACHE BOOL "Allows or disallows undefined symbols in shared libraries" FORCE )
1065mark_as_advanced( ANDROID_SO_UNDEFINED )
1066if( ANDROID_SO_UNDEFINED )
1067 set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} -Wl,-allow-shlib-undefined" )
1068endif()
1069
1070# Android by default passes --function-sections for C and C++ but does not pass -fdata-sections.
1071# Android also does not pass -Wl,--gc-sections
1072__INIT_VARIABLE( ANDROID_FUNCTION_LEVEL_LINKING VALUES ON )
1073set( ANDROID_FUNCTION_LEVEL_LINKING ON CACHE BOOL "Allows or disallows undefined symbols in shared libraries" FORCE )
1074mark_as_advanced( ANDROID_FUNCTION_LEVEL_LINKING )
1075if( ANDROID_FUNCTION_LEVEL_LINKING )
1076 set( ANDROID_C_FLAGS "${ANDROID_C_FLAGS} -fdata-sections -ffunction-sections" )
1077 set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS} -fdata-sections -ffunction-sections" )
1078 set( ANDROID_LINKER_FLAGS "-Wl,--gc-sections ${ANDROID_LINKER_FLAGS}" )
1079endif()
1080
1081if( ARMEABI_V7A )
1082 # this is *required* to use the following linker flags that routes around
1083 # a CPU bug in some Cortex-A8 implementations:
1084 # set( ANDROID_LINKER_FLAGS "-Wl,--fix-cortex-a8 ${ANDROID_LINKER_FLAGS}" )
1085 # Android passes all this stuff by default.
1086 set( ANDROID_LINKER_FLAGS "-no-canonical-prefixes -march=armv7-a -Wl,--fix-cortex-a8 -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now ${ANDROID_LINKER_FLAGS} -lc -lm" )
1087elseif( ARMEABI )
1088 set( ANDROID_LINKER_FLAGS "-no-canonical-prefixes -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now ${ANDROID_LINKER_FLAGS} -lc -lm" )
1089elseif ( X86 )
1090 set( ANDROID_LINKER_FLAGS "-no-canonical-prefixes -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now ${ANDROID_LINKER_FLAGS} -lc -lm" )
1091endif()
1092
1093# cache flags
1094set( CMAKE_CXX_FLAGS "${_CMAKE_CXX_FLAGS}" CACHE STRING "c++ flags" )
1095set( CMAKE_C_FLAGS "${_CMAKE_C_FLAGS}" CACHE STRING "c flags" )
1096set( CMAKE_CXX_FLAGS_RELEASE "${_CMAKE_CXX_FLAGS_RELEASE}" CACHE STRING "c++ Release flags" )
1097set( CMAKE_C_FLAGS_RELEASE "${_CMAKE_C_FLAGS_RELEASE}" CACHE STRING "c Release flags" )
1098set( CMAKE_CXX_FLAGS_DEBUG "${_CMAKE_CXX_FLAGS_DEBUG}" CACHE STRING "c++ Debug flags" )
1099set( CMAKE_C_FLAGS_DEBUG "${_CMAKE_C_FLAGS_DEBUG}" CACHE STRING "c Debug flags" )
1100set( CMAKE_SHARED_LINKER_FLAGS "" CACHE STRING "linker flags" )
1101set( CMAKE_MODULE_LINKER_FLAGS "" CACHE STRING "linker flags" )
1102set( CMAKE_EXE_LINKER_FLAGS "-Wl,-z,nocopyreloc" CACHE STRING "linker flags" )
1103
1104include_directories( SYSTEM ${ANDROID_SYSTEM_INCLUDE_DIRS} )
1105link_directories( ${ANDROID_SYSTEM_LIB_DIRS} )
1106
1107# finish flags
1108set( ANDROID_C_FLAGS "${ANDROID_C_FLAGS}" CACHE INTERNAL "Extra Android C compiler flags")
1109set( ANDROID_CXX_FLAGS "${ANDROID_CXX_FLAGS}" CACHE INTERNAL "Extra Android C++ compiler flags")
1110set( ANDROID_LINKER_FLAGS "${ANDROID_LINKER_FLAGS}" CACHE INTERNAL "Extra Android linker flags")
1111set( CMAKE_CXX_FLAGS "${ANDROID_CXX_FLAGS} ${CMAKE_CXX_FLAGS}" )
1112set( CMAKE_C_FLAGS "${ANDROID_C_FLAGS} ${CMAKE_C_FLAGS}" )
1113if( MIPS AND BUILD_WITH_ANDROID_NDK )
1114 set( CMAKE_SHARED_LINKER_FLAGS "-Wl,-T,${ANDROID_NDK}/toolchains/${ANDROID_TOOLCHAIN_NAME}/mipself.xsc ${ANDROID_LINKER_FLAGS} ${CMAKE_SHARED_LINKER_FLAGS}" )
1115 set( CMAKE_MODULE_LINKER_FLAGS "-Wl,-T,${ANDROID_NDK}/toolchains/${ANDROID_TOOLCHAIN_NAME}/mipself.xsc ${ANDROID_LINKER_FLAGS} ${CMAKE_MODULE_LINKER_FLAGS}" )
1116 set( CMAKE_EXE_LINKER_FLAGS "-Wl,-T,${ANDROID_NDK}/toolchains/${ANDROID_TOOLCHAIN_NAME}/mipself.x ${ANDROID_LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS}" )
1117else()
1118 set( CMAKE_SHARED_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} ${CMAKE_SHARED_LINKER_FLAGS}" )
1119 set( CMAKE_MODULE_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} ${CMAKE_MODULE_LINKER_FLAGS}" )
1120 set( CMAKE_EXE_LINKER_FLAGS "${ANDROID_LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS}" )
1121endif()
1122
1123# set these global flags for cmake client scripts to change behavior
1124set( ANDROID True )
1125set( BUILD_ANDROID True )
1126
1127# where is the target environment
1128set( CMAKE_FIND_ROOT_PATH "${ANDROID_TOOLCHAIN_ROOT}/bin" "${ANDROID_TOOLCHAIN_ROOT}/${ANDROID_TOOLCHAIN_MACHINE_NAME}" "${ANDROID_SYSROOT}" "${CMAKE_INSTALL_PREFIX}" "${CMAKE_INSTALL_PREFIX}/share" "${CMAKE_FIND_ROOT_PATH}" )
1129
1130# only search for libraries and includes in the ndk toolchain
1131set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY )
1132set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
1133set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )
1134
1135
1136# macro to find packages on the host OS
1137macro( find_host_package )
1138 set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER )
1139 set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY NEVER )
1140 set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE NEVER )
1141 if( CMAKE_HOST_WIN32 )
1142 SET( WIN32 1 )
1143 SET( UNIX )
1144 elseif( CMAKE_HOST_APPLE )
1145 SET( APPLE 1 )
1146 SET( UNIX )
1147 endif()
1148 find_package( ${ARGN} )
1149 SET( WIN32 )
1150 SET( APPLE )
1151 SET( UNIX 1 )
1152 set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY )
1153 set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
1154 set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )
1155endmacro()
1156
1157
1158# macro to find programs on the host OS
1159macro( find_host_program )
1160 set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER )
1161 set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY NEVER )
1162 set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE NEVER )
1163 if( CMAKE_HOST_WIN32 )
1164 SET( WIN32 1 )
1165 SET( UNIX )
1166 elseif( CMAKE_HOST_APPLE )
1167 SET( APPLE 1 )
1168 SET( UNIX )
1169 endif()
1170 find_program( ${ARGN} )
1171 SET( WIN32 )
1172 SET( APPLE )
1173 SET( UNIX 1 )
1174 set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY )
1175 set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
1176 set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )
1177endmacro()
1178
1179
1180macro( ANDROID_GET_ABI_RAWNAME TOOLCHAIN_FLAG VAR )
1181 if( "${TOOLCHAIN_FLAG}" STREQUAL "ARMEABI" )
1182 set( ${VAR} "armeabi" )
1183 elseif( "${TOOLCHAIN_FLAG}" STREQUAL "ARMEABI_V7A" )
1184 set( ${VAR} "armeabi-v7a" )
1185 elseif( "${TOOLCHAIN_FLAG}" STREQUAL "X86" )
1186 set( ${VAR} "x86" )
1187 else()
1188 set( ${VAR} "unknown" )
1189 endif()
1190endmacro()
1191
1192
1193# export toolchain settings for the try_compile() command
1194if( NOT PROJECT_NAME STREQUAL "CMAKE_TRY_COMPILE" )
1195 set( __toolchain_config "")
1196 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 )
1197 if( DEFINED ${__var} )
1198 if( "${__var}" MATCHES " ")
1199 set( __toolchain_config "${__toolchain_config}set( ${__var} \"${${__var}}\" CACHE INTERNAL \"\" )\n" )
1200 else()
1201 set( __toolchain_config "${__toolchain_config}set( ${__var} ${${__var}} CACHE INTERNAL \"\" )\n" )
1202 endif()
1203 endif()
1204 endforeach()
1205 file( WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/android.toolchain.config.cmake" "${__toolchain_config}" )
1206 unset( __toolchain_config )
1207 unset( __ndklibspath )
1208endif()
1209
1210
1211# set some obsolete variables for backward compatibility
1212set( ANDROID_SET_OBSOLETE_VARIABLES ON CACHE BOOL "Define obsolete Andrid-specific cmake variables" )
1213mark_as_advanced( ANDROID_SET_OBSOLETE_VARIABLES )
1214if( ANDROID_SET_OBSOLETE_VARIABLES )
1215 set( ANDROID_API_LEVEL ${ANDROID_NATIVE_API_LEVEL} )
1216 set( ARM_TARGET "${ANDROID_ABI}" )
1217 set( ARMEABI_NDK_NAME "${ANDROID_NDK_ABI_NAME}" )
1218endif()
1219
1220
1221# Variables controlling behavior or set by cmake toolchain:
1222# ANDROID_ABI : "armeabi-v7a" (default), "armeabi", "armeabi-v7a with NEON", "armeabi-v7a with VFPV3", "armeabi-v6 with VFP", "x86", "mips"
1223# ANDROID_NATIVE_API_LEVEL : 3,4,5,8,9,14 (depends on NDK version)
1224# ANDROID_SET_OBSOLETE_VARIABLES : ON/OFF
1225# ANDROID_USE_STLPORT : OFF/ON - EXPERIMENTAL!!!
1226# ANDROID_FORBID_SYGWIN : ON/OFF
1227# ANDROID_NO_UNDEFINED : ON/OFF
1228# ANDROID_SO_UNDEFINED : OFF/ON (default depends on NDK version)
1229# ANDROID_FUNCTION_LEVEL_LINKING : ON/OFF
1230# Variables that takes effect only at first run:
1231# ANDROID_FORCE_ARM_BUILD : ON/OFF
1232# LIBRARY_OUTPUT_PATH_ROOT : <any valid path>
1233# Can be set only at the first run:
1234# ANDROID_NDK
1235# ANDROID_STANDALONE_TOOLCHAIN
1236# ANDROID_TOOLCHAIN_NAME : "arm-linux-androideabi-4.4.3" or "arm-linux-androideabi-4.6" or "mipsel-linux-android-4.4.3" or "mipsel-linux-android-4.6" or "x86-4.4.3" or "x86-4.6"
1237# Obsolete:
1238# ANDROID_API_LEVEL : superseded by ANDROID_NATIVE_API_LEVEL
1239# ARM_TARGET : superseded by ANDROID_ABI
1240# ARM_TARGETS : superseded by ANDROID_ABI (can be set only)
1241# ANDROID_NDK_TOOLCHAIN_ROOT : superseded by ANDROID_STANDALONE_TOOLCHAIN (can be set only)
1242# ANDROID_LEVEL : superseded by ANDROID_NATIVE_API_LEVEL (completely removed)
1243#
1244# Primary read-only variables:
1245# ANDROID : always TRUE
1246# ARMEABI : TRUE for arm v6 and older devices
1247# ARMEABI_V6 : TRUE for arm v6
1248# ARMEABI_V7A : TRUE for arm v7a
1249# NEON : TRUE if NEON unit is enabled
1250# VFPV3 : TRUE if VFP version 3 is enabled
1251# X86 : TRUE if configured for x86
1252# BUILD_ANDROID : always TRUE
1253# BUILD_WITH_ANDROID_NDK : TRUE if NDK is used
1254# BUILD_WITH_STANDALONE_TOOLCHAIN : TRUE if standalone toolchain is used
1255# ANDROID_NDK_HOST_SYSTEM_NAME : "windows", "linux-x86" or "darwin-x86" depending on host platform
1256# ANDROID_NDK_ABI_NAME : "armeabi", "armeabi-v7a" or "x86" depending on ANDROID_ABI
1257# ANDROID_ARCH_NAME : "arm" or "x86" or "mips" depending on ANDROID_ABI
1258# TOOL_OS_SUFFIX : "" or ".exe" depending on host platform
1259# ANDROID_SYSROOT : path to the compiler sysroot
1260# ANDROID_SYSTEM_INCLUDE_DIRS
1261# ANDROID_SYSTEM_LIB_DIRS
1262# Obsolete:
1263# ARMEABI_NDK_NAME : superseded by ANDROID_NDK_ABI_NAME
1264#
1265# Secondary (less stable) read-only variables:
1266# ANDROID_COMPILER_VERSION : GCC version used
1267# ANDROID_C_FLAGS : C compiler flags required by Android platform
1268# ANDROID_CXX_FLAGS : C++ compiler flags required by Android platform
1269# ANDROID_SUPPORTED_ABIS : list of currently allowed values for ANDROID_ABI
1270# ANDROID_TOOLCHAIN_MACHINE_NAME : "arm-linux-androideabi", "arm-eabi" or "i686-android-linux"
1271# ANDROID_TOOLCHAIN_ROOT : path to the top level of toolchain (standalone or placed inside NDK)
1272# ANDROID_SUPPORTED_NATIVE_API_LEVELS : list of native API levels found inside NDK
1273#
1274# Defaults:
1275# ANDROID_DEFAULT_NDK_API_LEVEL
1276# ANDROID_DEFAULT_NDK_API_LEVEL_${ARCH}
1277# ANDROID_NDK_SEARCH_PATHS
1278# ANDROID_STANDALONE_TOOLCHAIN_SEARCH_PATH
1279# ANDROID_SUPPORTED_ABIS_${ARCH}
1280# ANDROID_SUPPORTED_NDK_VERSIONS