Olimex Support Forum

OLinuXino Android / Linux boards and System On Modules => A13 => Topic started by: meerd on November 24, 2012, 05:56:07 pm

Title: QT 4.8.3 on A13
Post by: meerd on November 24, 2012, 05:56:07 pm
Hi Everyone,

I am trying to build a root file system for Linux. I configured and compiled QT as I did before. But I always get:
"error while loading shared libraries: libQtGui.so.4: cannot open shared object file: No such file or directory"
error. Even though I configured the paths correctly, QT is always complaining that .so file is missing. I also examined the problem via strace and got this trace:

read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0h\331\24\0004\0\0\0"..., 512) = 512                                                                                                                                                   
lseek(3, 107160312, SEEK_SET)           = 107160312                                                                                                                                                                                         
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 1520) = 1520                                                                                                                                                 
lseek(3, 11723032, SEEK_SET)            = 11723032                                                                                                                                                                                           
read(3, "A4\0\0\0aeabi\0\1*\0\0\0\0057-A\0\6\n\7A\10\1\t\2\n\3\f"..., 53) = 53                                                                                                                                                               
close(3)                                = 0                                                                                                                                                                                                 
stat64("/opt/qt483_arm_debug/lib", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0                                                                                                                                                           
open("/opt/qt483_arm_debug/lib/libQtGui.so.4", O_RDONLY) = 3                                                                                                                                                                                 
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0h\331\24\0004\0\0\0"..., 512) = 512                                                                                                                                                   
lseek(3, 107160312, SEEK_SET)           = 107160312                                                                                                                                                                                         
read(3, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 1520) = 1520                                                                                                                                                 
lseek(3, 11723032, SEEK_SET)            = 11723032                                                                                                                                                                                           
read(3, "A4\0\0\0aeabi\0\1*\0\0\0\0057-A\0\6\n\7A\10\1\t\2\n\3\f"..., 53) = 53                                                                                                                                                               
close(3)                                = 0                                                                                                                                                                                                 
open("/etc/ld.so.cache", O_RDONLY)      = 3                                                                                                                                                                                                 
fstat64(3, {st_mode=S_IFREG|0644, st_size=28847, ...}) = 0                                                                                                                                                                                   
mmap2(NULL, 28847, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40110000                                                                                                                                                                               
close(3)           

This means system finds the library and attempts to load it. I do not know why but something goes wrong then it closes the file and continues seeking other directories. So the file could not be found.
Any ideas about this issue?
Title: Re: QT 4.8.3 on A13
Post by: lordlothar on November 24, 2012, 06:49:52 pm
Where are you trying to compile QT? On olinuxino, or trying to cross-compile it?
Title: Re: QT 4.8.3 on A13
Post by: meerd on November 24, 2012, 07:25:56 pm
I am (cross) compiling the library on my PC. (Ubuntu 12.04 LTS)
Title: Re: QT 4.8.3 on A13
Post by: lordlothar on November 24, 2012, 08:26:55 pm
I was trying too to cross-compile qt on Ubuntu 12.04, but i had some problems with the webkit. Did you try to re-configure with different options?
Title: Re: QT 4.8.3 on A13
Post by: meerd on November 24, 2012, 09:02:13 pm
Quote from: lordlothar on November 24, 2012, 08:26:55 pm
I was trying too to cross-compile qt on Ubuntu 12.04, but i had some problems with the webkit. Did you try to re-configure with different options?


I tried not only with different configurations but also with different tool chains. All my attempts failed. Recently, I have compiled the library with "-static" configuration and obtained larger binaries. I hoped it would work or gave me much more informative results to overcome the problem. But, this time I have got an bus error.

root@debian:/# ./animatedtiles -qws                                                                                                                                                                                                         
<3>Alignment trap: not handling instruction ed850b00 at [<40232e1c>]                                                                                                                                                                         
[ 7747.930000] Alignment trap: not handling instruction ed850b00 at [<40232e1c>]                                                                                                                                                             
<1>Unhandled fault: alignment exception (0x801) at 0x7feb31e6                                                                                                                                                                               
[ 7748.060000] Unhandled fault: alignment exception (0x801) at 0x7feb31e6                                                                                                                                                                   
Bus error       
Title: Re: QT 4.8.3 on A13
Post by: lordlothar on November 24, 2012, 09:15:43 pm
Have you tried older QT version? 4.7 maybe?Also as i can see, you are trying to run animatedtiles with -qws parameter.Have you managed to run the virtual framebuffer, or you are running the app on the native framebuffer?
Title: Re: QT 4.8.3 on A13
Post by: meerd on November 27, 2012, 12:39:31 pm
I was able to compile QT 4.8.3 and run examples with QT's embedded windowing system (QWS). I am going to share details within the shortest time.

meerd
Title: Re: QT 4.8.3 on A13
Post by: lordlothar on November 27, 2012, 04:15:05 pm
I did compile QT with virtual framebuffer (qvfb) too, but only 4.7.3 version (except the webkit). In 4.8.3, i can't compile the qvfb.
Title: Re: QT 4.8.3 on A13
Post by: lorenzo on December 12, 2012, 09:34:36 am
Hi,

I'm working on Qt to have a better support for OpenGL and gstreamer, but I was not so lucky.
Any suggestions on which toolchain and which Linux distro to use, I had several problems with glibc compatibility.

Thank you.

BR
Lorenzo
Title: Re: QT 4.8.3 on A13
Post by: isidoro on January 26, 2013, 02:21:59 am
Quote from: meerd on November 27, 2012, 12:39:31 pm
I was able to compile QT 4.8.3 and run examples with QT's embedded windowing system (QWS). I am going to share details within the shortest time.

meerd

Hi meerd,
I'm tryng to cross compile 4.8.4 embedded qt, but Im stuck on ./configure arguments:


./configure -xplatform qws/linux-arm-g++ -embedded arm -prefix /usr/qtarm/usr/local/qt-embedded \
            -qt-gfx-linuxfb -qt-gfx-vnc \
            -no-largefile -exceptions -no-accessibility -no-qt3support -no-sse2 -qt-zlib -no-gif -no-libtiff \
            -qt-libpng -no-libmng -qt-libjpeg -openssl -no-nis -no-cups -depths 16 \
            -qt-kbd-linuxinput -nomake demos -nomake examples \
            -qt-mouse-linuxinput -qt-mouse-tslib
           
are they similar to yours?
thanks.