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<a name="dist.readme-android"></a>9.�README.android</h1></div></div></div>
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������ 
How�to�cross-compile�and�run�on�Android.��Please�read�to�the�end, 
since�there�are�important�details�further�down�regarding�crash 
avoidance�and�GPU�support. 
 
These�notes�were�last�updated�on�4�Nov�2014,�for�Valgrind�SVN 
revision�14689/2987. 
 
These�instructions�are�known�to�work,�or�have�worked�at�some�time�in 
the�past,�for: 
 
arm: 
��Android�4.0.3�running�on�a�(rooted,�AOSP�build)�Nexus�S. 
��Android�4.0.3�running�on�Motorola�Xoom. 
��Android�4.0.3�running�on�android�arm�emulator. 
��Android�4.1���running�on�android�emulator. 
��Android�2.3.4�on�Nexus�S�worked�at�some�time�in�the�past. 
 
x86: 
��Android�4.0.3�running�on�android�x86�emulator. 
 
mips32: 
��Android�4.1.2�running�on�android�mips�emulator. 
��Android�4.2.2�running�on�android�mips�emulator. 
��Android�4.3���running�on�android�mips�emulator. 
��Android�4.0.4�running�on�BROADCOM�bcm7425 
 
arm64: 
��Android�4.5�(?)�running�on�ARM�Juno 
 
On�android-arm,�GDBserver�might�insert�breaks�at�wrong�addresses. 
Feedback�on�this�welcome. 
 
Other�configurations�and�toolchains�might�work,�but�haven't�been�tested. 
Feedback�is�welcome. 
 
Toolchain: 
 
��For�arm32,�x86�and�mips32�you�need�the�android-ndk-r6�native 
����development�kit.��r6b�and�r7�give�a�non-completely-working�build; 
����see�http://code.google.com/p/android/issues/detail?id=23203 
����For�the�android�emulator,�the�versions�needed�and�how�to�install 
����them�are�described�in�README.android_emulator. 
 
����You�can�get�android-ndk-r6�from 
����http://dl.google.com/android/ndk/android-ndk-r6-linux-x86.tar.bz2 
 
��For�arm64�(aarch64)�you�need�the�android-ndk-r10c�NDK,�from 
����http://dl.google.com/android/ndk/android-ndk-r10c-linux-x86_64.bin 
 
Install�the�NDK�somewhere.��Doesn't�matter�where.��Then: 
 
 
#�Modify�this�(obviously).��Note,�this�"export"�command�is�only�done 
#�so�as�to�reduce�the�amount�of�typing�required.��None�of�the�commands 
#�below�read�it�as�part�of�their�operation. 
# 
export�NDKROOT=/path/to/android-ndk-r<version> 
 
 
#�Then�cd�to�the�root�of�your�Valgrind�source�tree. 
# 
cd�/path/to/valgrind/source/tree 
 
 
#�After�this�point,�you�don't�need�to�modify�anything.��Just�copy�and 
#�paste�the�commands�below. 
 
 
#�Set�up�toolchain�paths. 
# 
#�For�ARM 
export�AR=$NDKROOT/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-ar 
export�LD=$NDKROOT/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-ld 
export�CC=$NDKROOT/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc 
 
#�For�x86 
export�AR=$NDKROOT/toolchains/x86-4.4.3/prebuilt/linux-x86/bin/i686-android-linux-ar 
export�LD=$NDKROOT/toolchains/x86-4.4.3/prebuilt/linux-x86/bin/i686-android-linux-ld 
export�CC=$NDKROOT/toolchains/x86-4.4.3/prebuilt/linux-x86/bin/i686-android-linux-gcc 
 
#�For�MIPS32 
export�AR=$NDKROOT/toolchains/mipsel-linux-android-4.8/prebuilt/linux-x86_64/bin/mipsel-linux-android-ar 
export�LD=$NDKROOT/toolchains/mipsel-linux-android-4.8/prebuilt/linux-x86_64/bin/mipsel-linux-android-ld 
export�CC=$NDKROOT/toolchains/mipsel-linux-android-4.8/prebuilt/linux-x86_64/bin/mipsel-linux-android-gcc 
 
#�For�ARM64�(AArch64) 
export�AR=$NDKROOT/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-ar� 
export�LD=$NDKROOT/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-ld 
export�CC=$NDKROOT/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-gcc 
 
 
#�Do�configuration�stuff.��Don't�mess�with�the�--prefix�in�the 
#�configure�command�below,�even�if�you�think�it's�wrong. 
#�You�may�need�to�set�the�--with-tmpdir�path�to�something 
#�different�if�/sdcard�doesn't�work�on�the�device�--�this�is 
#�a�known�cause�of�difficulties. 
 
#�The�below�re-generates�configure,�Makefiles,�... 
#�This�is�not�needed�if�you�start�from�a�release�tarball. 
./autogen.sh 
 
#�for�ARM 
CPPFLAGS="--sysroot=$NDKROOT/platforms/android-3/arch-arm"�\ 
���CFLAGS="--sysroot=$NDKROOT/platforms/android-3/arch-arm"�\ 
���./configure�--prefix=/data/local/Inst�\ 
���--host=armv7-unknown-linux�--target=armv7-unknown-linux�\ 
���--with-tmpdir=/sdcard 
#�note:�on�android�emulator,�android-14�platform�was�also�tested�and�works. 
#�It�is�not�clear�what�this�platform�nr�really�is. 
 
#�for�x86 
CPPFLAGS="--sysroot=$NDKROOT/platforms/android-9/arch-x86"�\ 
���CFLAGS="--sysroot=$NDKROOT/platforms/android-9/arch-x86�-fno-pic"�\ 
���./configure�--prefix=/data/local/Inst�\ 
���--host=i686-android-linux�--target=i686-android-linux�\ 
���--with-tmpdir=/sdcard 
 
#�for�MIPS32 
CPPFLAGS="--sysroot=$NDKROOT/platforms/android-18/arch-mips"�\ 
���CFLAGS="--sysroot=$NDKROOT/platforms/android-18/arch-mips"�\ 
���./configure�--prefix=/data/local/Inst�\ 
���--host=mipsel-linux-android�--target=mipsel-linux-android�\ 
���--with-tmpdir=/sdcard 
 
#�for�ARM64�(AArch64) 
CPPFLAGS="--sysroot=$NDKROOT/platforms/android-21/arch-arm64"�\ 
���CFLAGS="--sysroot=$NDKROOT/platforms/android-21/arch-arm64"�\ 
���./configure�--prefix=/data/local/Inst�\ 
���--host=aarch64-unknown-linux�--target=aarch64-unknown-linux�\ 
���--with-tmpdir=/sdcard 
 
 
#�At�the�end�of�the�configure�run,�a�few�lines�of�details 
#�are�printed.��Make�sure�that�you�see�these�two�lines: 
# 
#�For�ARM: 
#����������Platform�variant:�android 
#�����Primary�-DVGPV�string:�-DVGPV_arm_linux_android=1 
# 
#�For�x86: 
#����������Platform�variant:�android 
#�����Primary�-DVGPV�string:�-DVGPV_x86_linux_android=1 
# 
#�For�mips32: 
#����������Platform�variant:�android 
#�����Primary�-DVGPV�string:�-DVGPV_mips32_linux_android=1 
# 
#�For�ARM64�(AArch64): 
#����������Platform�variant:�android 
#�����Primary�-DVGPV�string:�-DVGPV_arm64_linux_android=1 
# 
#�If�you�see�anything�else�at�this�point,�something�is�wrong,�and 
#�either�the�build�will�fail,�or�will�succeed�but�you'll�get�something 
#�which�won't�work. 
 
 
#�Build,�and�park�the�install�tree�in�`pwd`/Inst 
# 
make�-j4 
make�-j4�install�DESTDIR=`pwd`/Inst 
 
 
#�To�get�the�install�tree�onto�the�device: 
#�(I�don't�know�why�it's�not�"adb�push�Inst�/data/local",�but�this 
#�formulation�does�appear�to�put�the�result�in�/data/local/Inst.) 
# 
adb�push�Inst�/ 
 
 
#�To�run�(on�the�device).��There�are�two�things�you�need�to�consider: 
# 
#�(1)�if�you�are�running�on�the�Android�emulator,�Valgrind�may�crash 
#�����at�startup.��This�is�because�the�emulator�(for�ARM)�may�not�be 
#�����simulating�a�hardware�TLS�register.��To�get�around�this,�run 
#�����Valgrind�with: 
#�������--kernel-variant=android-no-hw-tls 
#� 
#�(2)�if�you�are�running�a�real�device,�you�need�to�tell�Valgrind 
#�����what�GPU�it�has,�so�Valgrind�knows�how�to�handle�custom�GPU 
#�����ioctls.��You�can�choose�one�of�the�following: 
#�������--kernel-variant=android-gpu-sgx5xx�����#�PowerVR�SGX�5XX�series 
#�������--kernel-variant=android-gpu-adreno3xx��#�Qualcomm�Adreno�3XX�series 
#�����If�you�don't�choose�one,�the�program�will�still�run,�but�Memcheck 
#�����may�report�false�errors�after�the�program�performs�GPU-specific�ioctls. 
# 
#�Anyway:�to�run�on�the�device: 
# 
/data/local/Inst/bin/valgrind�[kernel�variant�args]�[the�usual�args�etc] 
 
 
#�Once�you're�up�and�running,�a�handy�modify-V-rebuild-reinstall 
#�command�line�(on�the�host,�of�course)�is 
# 
mq�-j2�&&�mq�-j2�install�DESTDIR=`pwd`/Inst�&&�adb�push�Inst�/ 
# 
#�where�'mq'�is�an�alias�for�'make�--quiet'. 
 
 
#�One�common�cause�of�runs�failing�at�startup�is�the�inability�of 
#�Valgrind�to�find�a�suitable�temporary�directory.��On�the�device, 
#�there�doesn't�seem�to�be�any�one�location�which�we�always�have 
#�permission�to�write�to.��The�instructions�above�use�/sdcard.��If 
#�that�doesn't�work�for�you,�and�you're�Valgrinding�one�specific 
#�application�which�is�already�installed,�you�could�try�using�its 
#�temporary�directory,�in�/data/data,�for�example 
#�/data/data/org.mozilla.firefox_beta. 
# 
#�Using�/system/bin/logcat�on�the�device�is�helpful�for�diagnosing 
#�these�kinds�of�problems. 
 
����</div>
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