Building necessitas alpha4

[Peter Saunderson]

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.
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