Building necessitas alpha4

[Ray Donnelly]

As I said, using Google's NDK will not work for building android qt (
relocations error and libgnustl_static error -
http://code.google.com/p/android/issues/detail?id=36472 ).

Rather than building your own NDK from Google's code (and thus ending
up with the same bugs) you should either use mine (it's the one we
supply and use with Necessitas):

http://mingw-and-ndk.googlecode.com/files/android-ndk-r8b-ma-windows.7z
http://mingw-and-ndk.googlecode.com/files/android-ndk-r8b-ma-linux-x86.7z
http://mingw-and-ndk.googlecode.com/files/android-ndk-r8b-ma-darwin-x86.7z

...or else build mine using the script we use:

git at git.kde.org:necessitas-tools.git (master branch)

look at build_ndk.sh in that repo.

for building android qt, look at build_sdk.sh which calls
android/androidconfigbuild.sh

On Wed, Aug 29, 2012 at 5:44 PM, Peter Saunderson <peteasa at gmail.com> wrote:
> Hi Ray,
>
> Thanks for the warnings!
>
> I am using Googles android-ndk-r8b NDK, with the latest compilers (v4.6)
> because I wanted to use the same NDK I used for OpenCV that I also am using
> on the same project - in theory it should keep things simple.  Thanks for
> the answers also about using "android:" to selective configure stuff.  I
> will look out for the failures that you mention.. I might end up building
> the Google compiler and linker at this rate..
>
> Peter.
>
>
> On 29/08/12 17:33, Ray Donnelly wrote:
>>
>> Hi Peter,
>>
>> Which NDK are you using? Ours or Google's? Google's won't work for 2
>> reasons, their libgnustl_static.a has it's symbols invisible and also
>> their linker has a bug in it to do with a specific relocation type.
>>
>> Also are you using the unstable branch of the Qt sources?
>>
>> Only libQtCore4.so gets linked to libgnustl_static.a:
>>
>> from qt-src\src\corelib\corelib.pro
>>
>> android: {
>>      #add whole gnu_stl library to QtCore
>>      LIBS_PRIVATE += -Wl,--whole-archive
>> $$ANDROID_SOURCES_CXX_STL_LIBDIR/libgnustl_static.a
>> -Wl,--no-whole-archive
>> }
>>
>> On android libstdc++ is just a few small support functions for C++.
>>
>> On Wed, Aug 29, 2012 at 4:14 PM, Peter Saunderson <peteasa at gmail.com>
>> wrote:
>>>
>>> Hi,
>>>
>>> I am building from source and plan to run on an android 4.1.1.  I am
>>> using
>>> Ubuntu 64bit machine for the build and am using android-ndk-r8b.
>>>
>>> I find errors such as
>>> obj/release/JSBase.o:(.ARM.extab.text.JSReportExtraMemoryCost+0x0):
>>> undefined reference to `__gxx_personality_v0'
>>>
>>> that are fixed by adding to the .pro file
>>> QMAKE_LIBS += -lgnustl_shared
>>>
>>> because in android the shared library file is named "libgnustl_shared.so"
>>> instead of "libstdc++.so" as on other platforms (see
>>> CPLUSPLUS-SUPPORT.html).
>>>
>>> I tried to make this change in mkspecs/android-g++/qmake.conf but had
>>> other
>>> errors.  Is there a construct that I can use in the .pro files such as
>>> neon:*-g++* { ... }
>>> that will make this change for just android builds of Qt? Is there a
>>> better
>>> way to fix this linker problem in necessitas?
>>>
>>> Thanks
>>>
>>> Peter.
>>> _______________________________________________
>>> Necessitas-devel mailing list
>>> Necessitas-devel at kde.org
>>> https://mail.kde.org/mailman/listinfo/necessitas-devel
>
>