QT 4.8.3 on A13

meerd · 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?

lordlothar · November 24, 2012, 06:49:52 PM

Where are you trying to compile QT? On olinuxino, or trying to cross-compile it?

meerd · November 24, 2012, 07:25:56 PM

I am (cross) compiling the library on my PC. (Ubuntu 12.04 LTS)

lordlothar · 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?

meerd · 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

lordlothar · 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?

meerd · 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

lordlothar · 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.

lorenzo · 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

isidoro · 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.