This repository has been archived by the owner on Dec 20, 2023. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 106
/
Makefile-Android
506 lines (426 loc) · 18.1 KB
/
Makefile-Android
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
#
# Copyright (c) Project openweave-core Authors
# Copyright (c) 2014-2017 Nest Labs, Inc.
# All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#
# Description:
# This file implements a glue makefile for building the Weave SDK
# for Android devices and simulators for multiple architectures.
#
# This was largely directed and inspired by two Android NDK
# documents:
#
# * Android NDK Programmer's Guide: Standalone Toolchain
# * Android NDK Programmer's Guide: C++ Support
#
#
# Command-line Configurable Options
#
ANDROID_ROOT ?= /usr/local/android
ANDROID_HOME ?= $(ANDROID_ROOT)/android-sdk-linux-r23.0.2
ANDROID_NDK_HOME ?= $(ANDROID_ROOT)/android-ndk-r10
ANDROID_API ?= $(ANDROID_RELEASE)
ANDROID_ABI ?= armeabi-v7a arm64-v8a x86 x86_64
ANDROID_STL ?= libc++
DEBUG ?= 0
ENABLE_TARGETED_LISTEN ?= 0
# Deprecated -- Use ANDROID_API
ANDROID_RELEASE ?= 22
#
# Android C++ Runtime (STL) Selection
#
ANDROID_STLROOT = $(ANDROID_NDK_HOME)/sources/cxx-stl
ANDROID_STL_INCLUDE_DIRS_libc++ = $(ANDROID_STLROOT)/llvm-libc++/include \
$(ANDROID_STLROOT)/llvm-libc++abi/include \
$(ANDROID_NDK_HOME)/sources/android/support/include
ANDROID_STL_INCLUDE_DIRS_gnustl = $(ANDROID_STLROOT)/gnu-libstdc++/4.9/include
ANDROID_STL_INCLUDE_DIRS_system = $(ANDROID_STLROOT)/system/include
ANDROID_STL_INCLUDES = $(foreach dir,$(ANDROID_STL_INCLUDE_DIRS_$(ANDROID_STL)),-isystem $(dir))
#
# Tools and Executables
#
android-ndk-which = $(shell $(AbsTopSourceDir)/build/scripts/android-ndk-which --ndk-home $(ANDROID_NDK_HOME) $(1) $(TARGET_ABI))
AR = $(call android-ndk-which,ar)
AS = $(call android-ndk-which,as)
CPP = $(call android-ndk-which,cpp)
CC = $(call android-ndk-which,gcc)
CXX = $(call android-ndk-which,g++)
LD = $(call android-ndk-which,ld)
STRIP = $(call android-ndk-which,strip)
NM = $(call android-ndk-which,nm)
RANLIB = $(call android-ndk-which,ranlib)
OBJCOPY = $(call android-ndk-which,objcopy)
ECHO = @echo
MAKE = make
MKDIR_P = mkdir -p
LN_S = ln -s
RM_F = rm -f
INSTALL = /usr/bin/install
#
# Common C/C++ Defines
#
DEFINES += -D__ANDROID_API__=$(ANDROID_API) \
-DWEAVE_CONFIG_ENABLE_TARGETED_LISTEN=$(ENABLE_TARGETED_LISTEN) \
-DWEAVE_PROGRESS_LOGGING=$(DEBUG) \
-DWEAVE_ERROR_LOGGING=$(DEBUG) \
-DWEAVE_DETAIL_LOGGING=$(DEBUG)
ifeq ($(DEBUG),1)
DEFINES = -DDEBUG=$(DEBUG) -UNDEBUG
else
DEFINES = -DNDEBUG=1 -UDEBUG
endif
#
# Common C/C++ Includes
#
INCLUDES += -isystem $(ANDROID_NDK_HOME)/sysroot/usr/include \
$(ANDROID_STL_INCLUDES)
#
# Compilation/Build Flags
#
CPPFLAGS = --sysroot=$(ABI_SYSROOT) $(DEFINES) $(INCLUDES) $(ABI_CPPFLAGS)
CFLAGS = $(CPPFLAGS) -ffunction-sections -funwind-tables $(ABI_CFLAGS)
CXXFLAGS = $(CPPFLAGS) -fno-rtti $(ABI_CXXFLAGS)
LDFLAGS = --sysroot=$(ABI_SYSROOT) -Wl,--gc-sections $(ABI_LDFLAGS)
INSTALLFLAGS = -p
ifndef BuildJobs
BuildJobs := $(shell getconf _NPROCESSORS_ONLN)
endif
JOBSFLAG := -j$(BuildJobs)
#
# Common Weave configure options
#
CONFIGURE_OPTIONS = --disable-cocoa \
--disable-docs \
--enable-java \
--disable-python \
--enable-shared \
--disable-tests \
--disable-tools
ifeq ($(DEBUG),1)
CONFIGURE_OPTIONS += --enable-debug --enable-optimization=no
else
CONFIGURE_OPTIONS +=
endif
#
# Directories
#
TopSourceDir := $(dir $(shell readlink $(firstword $(MAKEFILE_LIST))))
AbsTopSourceDir := $(dir $(realpath $(firstword $(MAKEFILE_LIST))))
BuildPath = build
TopBuildDir = $(BuildPath)
AbsTopBuildDir = $(PWD)/$(TopBuildDir)
ResultPath = output
TopResultDir = $(ResultPath)
AbsTopResultDir = $(PWD)/$(TopResultDir)
# NB: Regardless of where JAVA_HOME points, always use the JNI headers from the Android NDK,
# and only include the top-most directory (include), not the system directory (include/linux).
# Because the NDK mixes the JNI headers in with the linux headers, listing the system
# directory in the -I flags will result in strange compilation errors. And unlike the standard
# Java jni.h, the jni.h that comes with the Android NDK does not depend on any system-specific
# JNI header files (e.g. jni_md.h). Thus only the top-level include directory is needed.
JNI_INCLUDE_DIRS = $(ABI_SYSROOT)/usr/include
#
# ABI-specific Configurations
#
ABI_CONFIG_TUPLE_armeabi = arm-unknown-linux-android
ABI_SYSROOT_armeabi = $(ANDROID_NDK_HOME)/platforms/android-$(ANDROID_API)/arch-arm
ABI_CPPFLAGS_armeabi = -march=armv5te -mtune=xscale -msoft-float -isystem $(ANDROID_NDK_HOME)/sysroot/usr/include/arm-linux-androideabi
ABI_CFLAGS_armeabi = -fstack-protector
ABI_CXXFLAGS_armeabi = -I$(ANDROID_NDK_HOME)/platforms/android-$(ANDROID_API)/arch-arm/usr/include
ABI_LDFLAGS_armeabi = -march=armv5te -mtune=xscale -msoft-float
ABI_CONFIG_TUPLE_armeabi-v7a = armv7-unknown-linux-android
ABI_SYSROOT_armeabi-v7a = $(ANDROID_NDK_HOME)/platforms/android-$(ANDROID_API)/arch-arm
ABI_CPPFLAGS_armeabi-v7a = -march=armv7-a -mfpu=vfpv3-d16 -mfloat-abi=softfp -isystem $(ANDROID_NDK_HOME)/sysroot/usr/include/arm-linux-androideabi
ABI_CFLAGS_armeabi-v7a = -fstack-protector
ABI_CXXFLAGS_armeabi-v7a = -I$(ANDROID_NDK_HOME)/platforms/android-$(ANDROID_API)/arch-arm/usr/include
ABI_LDFLAGS_armeabi-v7a = -march=armv7-a -Wl,--fix-cortex-a8
ABI_CONFIG_TUPLE_arm64-v8a = arm64-unknown-linux-android
ABI_SYSROOT_arm64-v8a = $(ANDROID_NDK_HOME)/platforms/android-$(ANDROID_API)/arch-arm64
ABI_CPPFLAGS_arm64-v8a = -march=armv8-a -isystem $(ANDROID_NDK_HOME)/sysroot/usr/include/aarch64-linux-android
ABI_CFLAGS_arm64-v8a = -fstack-protector
ABI_CXXFLAGS_arm64-v8a = -I$(ANDROID_NDK_HOME)/platforms/android-$(ANDROID_API)/arch-arm64/usr/include
ABI_LDFLAGS_arm64-v8a = -march=armv8-a
ABI_CONFIG_TUPLE_x86 = x86-unknown-linux-android
ABI_SYSROOT_x86 = $(ANDROID_NDK_HOME)/platforms/android-$(ANDROID_API)/arch-x86
ABI_CPPFLAGS_x86 = -march=i686 -mtune=intel -mssse3 -mfpmath=sse -m32 -isystem $(ANDROID_NDK_HOME)/sysroot/usr/include/i686-linux-android
ABI_CFLAGS_x86 =
ABI_CXXFLAGS_x86 = -I$(ANDROID_NDK_HOME)/platforms/android-$(ANDROID_API)/arch-x86/usr/include
ABI_LDFLAGS_x86 = -march=i686 -mtune=intel -mssse3 -mfpmath=sse -m32
ABI_CONFIG_TUPLE_x86_64 = x86_64-unknown-linux-android
ABI_SYSROOT_x86_64 = $(ANDROID_NDK_HOME)/platforms/android-$(ANDROID_API)/arch-x86_64
ABI_CPPFLAGS_x86_64 = -march=x86-64 -msse4.2 -mpopcnt -m64 -mtune=intel -isystem $(ANDROID_NDK_HOME)/sysroot/usr/include/x86_64-linux-android
ABI_CFLAGS_x86_64 =
ABI_CXXFLAGS_x86_64 = -I$(ANDROID_NDK_HOME)/platforms/android-$(ANDROID_API)/arch-x86_64/usr/include
ABI_LDFLAGS_x86_64 = -march=x86-64 -msse4.2 -mpopcnt -m64 -mtune=intel
#
# automake files
#
AMFILES = src/system/SystemLayer.am \
src/system/Makefile.am \
src/platform/ble/bluez/Makefile.am \
src/adaptations/device-layer/Makefile.am \
src/include/Makefile.am \
src/lib/profiles/WeaveProfiles.am \
src/lib/core/WeaveCore.am \
src/lib/support/verhoeff/Makefile.am \
src/lib/support/WeaveSupport.am \
src/lib/support/Makefile.am \
src/lib/Makefile.am \
src/warm/Warm.am \
src/warm/Makefile.am \
src/inet/InetLayer.am \
src/inet/Makefile.am \
src/ble/BleLayer.am \
src/ble/Makefile.am \
src/test-apps/fuzz/Makefile.am \
src/test-apps/wrapper-tests/jni/Makefile.am \
src/test-apps/Makefile.am \
src/examples/Makefile.am \
src/wrappers/jni/jni-utils/Makefile.am \
src/wrappers/jni/security-support/Makefile.am \
src/wrappers/jni/Makefile.am \
src/lwip/Makefile.am \
src/Makefile.am \
src/ra-daemon/Makefile.am \
src/tools/weave/Makefile.am \
src/tools/misc/Makefile.am \
src/device-manager/DeviceManager.am \
src/device-manager/cocoa/Makefile.am \
src/device-manager/java/Makefile.am \
src/device-manager/python/Makefile.am \
third_party/Makefile.am \
doc/Makefile.am \
Makefile.am \
configure.ac \
$(NULL)
#
# configure-action <abi>
#
# Steps to configure the Weave SDK for a specific Android ABI.
#
# abi - The target ABI.
#
define configure-action
$(ECHO) " CONFIG $(ABI_CONFIG_TUPLE_$(1))..."
(cd $(BuildPath)/$(ABI_CONFIG_TUPLE_$(1)) && $(AbsTopSourceDir)/configure -C \
CPP="$(CPP)" CC="$(CC)" CXX="$(CXX)" OBJC="$(OBJC)" OBJCXX="$(OBJCXX)" AR="$(AR)" RANLIB="$(RANLIB)" NM="$(NM)" STRIP="$(STRIP)" \
INSTALL="$(INSTALL) $(INSTALLFLAGS)" \
CPPFLAGS="$(CPPFLAGS)" \
CFLAGS="$(CFLAGS)" \
CXXFLAGS="$(CXXFLAGS)" \
OBJCFLAGS="$(OBJCFLAGS)" \
OBJCXXFLAGS="$(OBJCXXFLAGS)" \
LDFLAGS="$(LDFLAGS)" \
JAVA_HOME="$(JAVA_HOME)" \
JNI_INCLUDE_DIRS="$(JNI_INCLUDE_DIRS)" \
--build=$(shell $(AbsTopSourceDir)/third_party/nlbuild-autotools/repo/third_party/autoconf/config.guess) \
--host=$(ABI_CONFIG_TUPLE_$(1)) \
--with-sysroot=$(ABI_SYSROOT) \
--with-libtool-sysroot=$(ABI_SYSROOT) \
--with-weave-project-includes=$(AbsTopSourceDir)/build/config/android \
--prefix=/ \
--exec-prefix=/$(ABI_CONFIG_TUPLE_$(1)) \
$(CONFIGURE_OPTIONS))
endef # configure-action
#
# build-action <abi>
#
# Steps to generate the Weave SDK intermediate build products for the specified Android ABI.
#
# abi - The target ABI.
#
define build-action
$(ECHO) " BUILD $(ABI_CONFIG_TUPLE_$(1))"
$(MAKE) $(JOBSFLAG) -C $(BuildPath)/$(ABI_CONFIG_TUPLE_$(1)) --no-print-directory all
endef # build-action
#
# stage-action <abi>
#
# Steps to stage (install) the Weave SDK final build products for the specified
# specified Android ABI.
#
# abi - The target ABI.
#
define stage-action
$(ECHO) " STAGE $(ABI_CONFIG_TUPLE_$(1))"
$(MAKE) $(JOBSFLAG) -C $(BuildPath)/$(ABI_CONFIG_TUPLE_$(1)) --no-print-directory DESTDIR=$(AbsTopResultDir) install
endef # stage-action
#
# pretty-action <abi>
#
# Steps to pretty-ify the Weave SDK source code for the specified Android ABI.
#
# abi - The target ABI.
#
define pretty-action
$(ECHO) " PRETTY $(1)"
$(MAKE) $(JOBSFLAG) -C $(BuildPath)/$(ABI_CONFIG_TUPLE_$(1)) --no-print-directory pretty
endef # pretty-action
#
# pretty-check-action <abi>
#
# Steps to pretty-check (lint) the Weave SDK source code for the specified
# Android ABI.
#
# abi - The target ABI.
#
define pretty-check-action
$(ECHO) " PRETTY $(1)"
$(MAKE) $(JOBSFLAG) -C $(BuildPath)/$(ABI_CONFIG_TUPLE_$(1)) --no-print-directory pretty-check
endef # pretty-check-action
#
# clean-action <abi>
#
# Steps to clean (delete) the Weave SDK final build products for the specified
# specified Android ABI.
#
# abi - The target ABI.
#
define clean-action
$(ECHO) " CLEAN $(1)"
@$(RM_F) -r $(BuildPath)/$(ABI_CONFIG_TUPLE_$(1))
endef # clean-action
#
# ABI_template <abi>
#
# Define macros, targets and rules to configure, build, and stage the
# Weave SDK for a single Android ABI.
#
# abi - The architecture to instantiate the template for.
#
define ABI_template
CONFIGURE_TARGETS += configure-$(1)
BUILD_TARGETS += do-build-$(1)
STAGE_TARGETS += stage-$(1)
PRETTY_TARGETS += pretty-$(1)
PRETTY_CHECK_TARGETS += pretty-check-$(1)
CLEAN_TARGETS += clean-$(1)
BUILD_DIRS += $(BuildPath)/$(ABI_CONFIG_TUPLE_$(1))
.PHONY: configure-$(1) do-build-$(1) stage-$(1) pretty-$(1) lint-$(1) pretty-check-$(1) clean-$(1)
configure-$(1): TARGET_ABI=$(1)
configure-$(1): ABI_SYSROOT=$(ABI_SYSROOT_$(1))
configure-$(1): ABI_CPPFLAGS=$(ABI_CPPFLAGS_$(1))
configure-$(1): ABI_CFLAGS=$(ABI_CFLAGS_$(1))
configure-$(1): ABI_CXXFLAGS=$(ABI_CXXFLAGS_$(1))
configure-$(1): ABI_LDFLAGS=$(ABI_LDFLAGS_$(1))
configure-$(1): env-check $(BuildPath)/$(ABI_CONFIG_TUPLE_$(1))/config.status
$(BuildPath)/$(ABI_CONFIG_TUPLE_$(1))/config.status: | $(BuildPath)/$(ABI_CONFIG_TUPLE_$(1))
$$(call configure-action,$(1))
do-build-$(1): configure-$(1)
do-build-$(1):
$$(call build-action,$(1))
stage-$(1): do-build-$(1)
stage-$(1): | $(TopResultDir)
$$(call stage-action,$(1))
pretty-$(1): configure-$(1)
$$(call pretty-action,$(1))
lint-$(1) pretty-check-$(1): configure-$(1)
$$(call pretty-check-action,$(1))
clean-$(1):
$$(call clean-action,$(1))
endef # ABI_template
#
# Rules
#
# Don't allow this top-level makefile's targets to be built in parallel.
.NOTPARALLEL:
.DEFAULT_GOAL := all
.PHONY : all configure build stage check pretty lint pretty-check clean env-check help
# Instantiate an ABI-specific set of rules to build weave for each target ABI.
$(foreach abi,$(ANDROID_ABI),$(eval $(call ABI_template,$(abi))))
all: stage
Makefile.in: $(AMFILES)
$(ECHO) "BOOTSTRAP"
@./bootstrap
configure: Makefile.in $(CONFIGURE_TARGETS)
build: $(BUILD_TARGETS)
stage: $(STAGE_TARGETS)
pretty: $(PRETTY_TARGETS)
lint pretty-check: $(PRETTY_CHECK_TARGETS)
clean: $(CLEAN_TARGETS)
env-check:
@if [ -z "$(JAVA_HOME)" ]; then \
echo "JAVA_HOME not set"; \
false; \
fi
@if [ \! -d "$(ANDROID_HOME)" ]; then \
echo "ERROR: Android SDK not found at $(ANDROID_HOME)"; \
echo "Override the ANDROID_HOME variable to specify an alternate location for the Android SDK"; \
false; \
fi
@if [ \! -d "$(ANDROID_NDK_HOME)" ]; then \
echo "ERROR: Android NDK not found at $(ANDROID_NDK_HOME)"; \
echo "Override the ANDROID_NDK_HOME variable to specify an alternate location for the Android NDK"; \
false; \
fi
@if [ \! -d "$(ANDROID_NDK_HOME)/platforms/android-$(ANDROID_API)" ]; then \
echo "ERROR: Android API level $(ANDROID_API) not supported by NDK at $(ANDROID_NDK_HOME)"; \
echo "Override the ANDROID_API variable to select another API level"; \
false; \
fi
$(ECHO) "NOTE: JAVA_HOME is '$(JAVA_HOME)' (source: $(origin JAVA_HOME))"
$(ECHO) "NOTE: ANDROID_HOME is '$(ANDROID_HOME)' (source: $(origin ANDROID_HOME))"
$(ECHO) "NOTE: ANDROID_NDK_HOME is '$(ANDROID_NDK_HOME)' (source: $(origin ANDROID_NDK_HOME))"
$(ECHO) "NOTE: ANDROID_API is $(ANDROID_API) (source: $(origin ANDROID_API))"
$(ECHO) "NOTE: ANDROID_ABI is '$(ANDROID_ABI)' (source: $(origin ANDROID_ABI))"
$(ECHO) "NOTE: ANDROID_STL is '$(ANDROID_STL)' (source: $(origin ANDROID_STL))"
$(TopResultDir) $(BUILD_DIRS):
$(ECHO) " MKDIR $@"
@$(MKDIR_P) "$@"
help:
$(ECHO) ""
$(ECHO) "Type 'make -f $(firstword $(MAKEFILE_LIST))' to build Weave for Android for the following"
$(ECHO) "API level and ABIs: "
$(ECHO) ""
$(ECHO) " API Level $(ANDROID_API)"
$(ECHO) " $(ANDROID_ABI)"
$(ECHO) ""
$(ECHO) "To build for a particular API or ABI, override the ANDROID_API and ANDROID_ABI"
$(ECHO) "variables as follows:"
$(ECHO) ""
$(ECHO) " make -f $(firstword $(MAKEFILE_LIST)) ANDROID_API=24 ANDROID_ABI='armv7 x86'"
$(ECHO) ""
$(ECHO) "You may want or need to override the following make variables either on the "
$(ECHO) "command line or in the environment: "
$(ECHO) ""
$(ECHO) " DEBUG Enable Weave debug code and logging (default: $(DEBUG))."
$(ECHO) ""
$(ECHO) " ENABLE_TARGETED_LISTEN Enable Weave support for listening on particular "
$(ECHO) " addresses or interfaces. This allows testing multiple "
$(ECHO) " instances of the Weave stack running on a single host "
$(ECHO) " (default: $(ENABLE_TARGETED_LISTEN))."
$(ECHO) ""
$(ECHO) " JAVA_HOME Directory in which the Java runtime is located."
$(ECHO) ""
$(ECHO) " ANDROID_ROOT Directory where Android NDK and SDK are installed (if "
$(ECHO) " the same) (default: $(ANDROID_ROOT))."
$(ECHO) ""
$(ECHO) " ANDROID_NDK_HOME Directory where Android NDK is installed (default: "
$(ECHO) " $(ANDROID_NDK_HOME))."
$(ECHO) ""
$(ECHO) " ANDROID_HOME Directory where Android SDK is installed (default: "
$(ECHO) " $(ANDROID_HOME))."
$(ECHO) ""
$(ECHO) " ANDROID_API Android NDK API level to build against (default: $(ANDROID_API))."
$(ECHO) ""
$(ECHO) " ANDROID_ABI List of Android ABIs to build for. Choices are: armeabi,"
$(ECHO) " armeabi-v7a, arm64-v8a, x86 and x86_64 (default: "
$(ECHO) " $(ANDROID_ABI))."
$(ECHO) ""
$(ECHO) " NOTE: Support for armeabi is deprecated in later SDKs/NDKs."
$(ECHO) ""
$(ECHO) " ANDROID_STL Android NDK C++ runtime to build against. Choices"
$(ECHO) " are libc++, gnustl and system (default: libc++)."