[mythtv] Android 32bit build

Fri Aug 10 21:11:21 UTC 2018

On 08/09/2018 06:26 PM, Mark Spieth wrote:
> On 8/10/2018 7:27 AM, Peter Bennett wrote:
>>
>>
>>
>> On 08/08/2018 08:14 PM, Mark Spieth wrote:
>>> On 09/08/18 08:37, Peter Bennett wrote:
>>>> I am trying to build the libraries for 32bit.
>>>>
>>>> liblzo fails in the configure "C compiler cannot create executables"
>>>>
>>>> makelibs.sh has, for 32bit,     CPU="armv7-a"
>>>>
>>>> The configure runs this
>>>>
>>>> /home/peter/android/android-ndk/my-android-toolchain/bin/arm-linux-androideabi-gcc 
>>>> -isysroot 
>>>> /home/peter/android/android-ndk/my-android-toolchain/sysroot 
>>>> -mcpu=armv7-a   conftest.c
>>>>
>>>> The error is
>>>>
>>>> arm-linux-androideabi-gcc: error: unrecognized argument in option 
>>>> '-mcpu=armv7-a'
>>>> arm-linux-androideabi-gcc: note: valid arguments to '-mcpu=' are: 
>>>> arm1020e arm1020t arm1022e arm1026ej-s arm10e arm10tdmi arm1136j-s 
>>>> arm1136jf-s arm1156t2-s arm1156t2f-s arm1176jz-s arm1176jzf-s arm2 
>>>> arm250 arm3 arm6 arm60 arm600 arm610 arm620 arm7 arm70 arm700 
>>>> arm700i arm710 arm7100 arm710c arm710t arm720 arm720t arm740t 
>>>> arm7500 arm7500fe arm7d arm7di arm7dm arm7dmi arm7m arm7tdmi 
>>>> arm7tdmi-s arm8 arm810 arm9 arm920 arm920t arm922t arm926ej-s 
>>>> arm940t arm946e-s arm966e-s arm968e-s arm9e arm9tdmi cortex-a12 
>>>> cortex-a15 cortex-a15.cortex-a7 cortex-a5 cortex-a53 cortex-a57 
>>>> cortex-a57.cortex-a53 cortex-a7 cortex-a8 cortex-a9 cortex-m0 
>>>> cortex-m0plus cortex-m1 cortex-m3 cortex-m4 cortex-r4 cortex-r4f 
>>>> cortex-r5 cortex-r7 ep9312 fa526 fa606te fa626 fa626te fa726te 
>>>> fmp626 generic-armv7-a iwmmxt iwmmxt2 marvell-pj4 mpcore 
>>>> mpcorenovfp native strongarm strongarm110 strongarm1100 
>>>> strongarm1110 xscale
>>>>
>>>> I tried changing CPU to use generic-armv7-a which is one of the 
>>>> "valid" arguments according to above message. That gives the same 
>>>> error, but this time not even displaying the list of "valid 
>>>> arguments".
>>>>
>>>> ndk is android-ndk-r13b
>>>>
>>>> Any suggestions?
>>>>
>>> try this.
>>>
>>> diff --git a/android/makelibs.sh b/android/makelibs.sh
>>> index 9d737b2..8c54895 100755
>>> --- a/android/makelibs.sh
>>> +++ b/android/makelibs.sh
>>> @@ -1179,17 +1179,15 @@ OPATH=$PATH
>>>  #              ;;
>>>  #      *)
>>>  #END
>>> +export PATH="$PATH:$CROSSPATH"
>>>  ./configure \
>>> -       CFLAGS="-isysroot $SYSROOT -mcpu=$CPU" \
>>> -       CXXFLAGS="-isysroot $SYSROOT -mcpu=$CPU" \
>>> -       CC="$CROSSPATH/$MY_ANDROID_NDK_TOOLS_PREFIX-gcc" \
>>> -       CXX="$CROSSPATH/$MY_ANDROID_NDK_TOOLS_PREFIX-g++" \
>>> -       CPP="$CROSSPATH/$MY_ANDROID_NDK_TOOLS_PREFIX-cpp" \
>>> -       --host=arm-linux-androideabi \
>>> +       --host=$MY_ANDROID_NDK_TOOLS_PREFIX \
>>>         --prefix=$INSTALLROOT \
>>>         --enable-shared \
>>>         --enable-static && \
>>>  make clean && \
>>> +CFLAGS="-isysroot $SYSROOT -mcpu=$CPU" \
>>> +CXXFLAGS="-isysroot $SYSROOT -mcpu=$CPU" \
>>>  make -j$NCPUS src/liblzo2.la && \
>>>  make install-libLTLIBRARIES install-data-am
>>>  ERR=$?
>>>
>>> builds for me both 32 and 64 but untested on targets.
>>>
>>> Mark
>>>
>>>
>> Thank you, it now builds and installs on my 32-bit tablet. However it 
>> does not run.
>>
>> D/dalvikvm( 6836): Trying to load lib 
>> /data/data/org.mythtv.mythfrontend/lib/libQt5Core.so 0x4199b580
>> E/dalvikvm( 6836): 
>> dlopen("/data/data/org.mythtv.mythfrontend/lib/libQt5Core.so") 
>> failed: Cannot load library: soinfo_relocate(linker.cpp:976): cannot 
>> locate symbol "srand" referenced by "libQt5Core.so"...
>> W/System.err( 6836): java.lang.reflect.InvocationTargetException
>> ...
>> W/System.err( 6836): Caused by: java.lang.UnsatisfiedLinkError: 
>> Cannot load library: soinfo_relocate(linker.cpp:976): cannot locate 
>> symbol "srand" referenced by "libQt5Core.so"...
>>
>> Some internet links about this -
>>
>> /For those stumbling onto this thread while having trouble with 
>> srand/atof on NDK r10c: Make sure you set your android target to 19. 
>> Your app should then work on Android 5 (21) as well as all lower 
>> versions.//
>> /
>> /if i use Android 19 to compile the codes that invoke srand(), 
>> because srand() is a static inline function, so it will invoke 
>> srand48 instead, which means cocos2d-x depends on srand48 instead of 
>> srand. srand48 is defined in all Android versions, so there is not 
>> problem.//
>> //i using Android 21+ to compiling the codes, srand() is defined like 
>> void srand(unsigned int);, so cocos2d-x depends on srand. Because 
>> srand is not defined below Android 21, so it will have problem if 
>> running on Android version below 21.//
>> /
>> My tablet has android 4.2.2, which should be ok with api version 21, 
>> I would think.
> Ah 4.2.2.
>
> I have a "special" build mode.
>
> ./makelibs.sh --oldarm all
> ./mythbuild --oldarm
>
> It did work for me for 4.2.2 and 4.4 like my projector and my TV. 32 
> bit only build too.
>
> I just noticed that there may be some inconsistencies between makelibs 
> and mythbuild for ANDROID_NATIVE_API_LEVEL.
> That may (or not) need to be resolved.
>
> Also this is untested with newer lib additions as yet.
>
> HTH
> Mark
>
Hi Mark

--oldarm successfully compiled and installed after a couple of tweaks.

Now it fails with

D/dalvikvm( 9979): Trying to load lib 
/data/data/org.mythtv.mythfrontend/qt-reserved-files/plugins/platforms/android/libqtforandroid.so 
0x4212fc50
E/dalvikvm( 9979): 
dlopen("/data/data/org.mythtv.mythfrontend/qt-reserved-files/plugins/platforms/android/libqtforandroid.so") 
failed: Cannot load library: soinfo_link_image(linker.cpp:1636): could 
not load library "libfreetype.so" needed by "libqtforandroid.so"; caused 
by load_library(linker.cpp:746): library "libfreetype.so" not found

I checked, libfreetype.so does exist in 
/data/data/org.mythtv.mythfrontend/lib/
It is the correct file type
peter at andromeda:~$ file 
'/home/peter/proj/github.com/MythTV/packaging/android/mythinstallold/libs/armeabi-v7a/libfreetype.so'
/home/peter/proj/github.com/MythTV/packaging/android/mythinstallold/libs/armeabi-v7a/libfreetype.so: 
ELF 32-bit LSB shared object, ARM, EABI5 version 1 (SYSV), dynamically 
linked, interpreter /system/bin/linker, stripped

Perhaps it is supposed to be in directory 
/data/data/org.mythtv.mythfrontend/qt-reserved-files/plugins/platforms/android/ 
where that libqtforandroid.so is found.

Adding to my confusion is the fact that in the apk we do not deploy a 
file called 
qt-reserved-files/plugins/platforms/android/libqtforandroid.so - we 
actually deploy 
lib/armeabi-v7a/libplugins_platforms_android_libqtforandroid.so and by 
some magic it maybe gets renamed and moved, or possibly just linked.

On android the file 
/data/data/org.mythtv.mythfrontend/libplugins_platforms_android_libqtforandroid.so 
exists and can be listed.
I am unable to list 
/data/data/org.mythtv.mythfrontend/qt-reserved-files/plugins/platforms/android/, 
I get Permission denied.

If you don't know what is going on here, no worry this is not important, 
just something I am trying for interest and learning.

Peter
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