QT Creator cannot run any of examples

broi

I just installed QT SDK and first thing I did is check "Demos and Examples" but on EVERY "Run" I get some errors. They're most like this:
[code]
/usr/bin/ld: warning: libpng12.so.0, needed by /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so, not found (try using -rpath or -rpath-link)
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_read_info@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_gAMA@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_get_tRNS@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_PLTE@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_filler@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_get_text@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_packing@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_write_rows@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_invert_mono@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_error_fn@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_write_chunk@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_get_image_width@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_IHDR@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_sig_bytes@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_read_update_info@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_write_fn@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_write_end@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_create_read_struct@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_read_image@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_gray_to_rgb@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_get_IHDR@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_get_channels@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_strip_16@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_expand@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_pHYs@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_create_write_struct@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_get_gAMA@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_write_info@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_text@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_get_PLTE@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_oFFs@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_destroy_write_struct@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_get_io_ptr@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_get_image_height@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_get_y_pixels_per_meter@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_compression_level@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_get_x_pixels_per_meter@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_gamma@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_destroy_read_struct@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_read_end@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_packswap@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_sBIT@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_error@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_write_image@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_read_fn@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_tRNS@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_create_info_struct@PNG12_0' /home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_set_bgr@PNG12_0'
/home/broi/QtSDK/Simulator/Qt/gcc/lib/libQtGui.so: undefined reference to png_get_valid@PNG12_0' collect2: ld returned 1 exit status make: *** [annotatedurl] Error 1 make: Leaving directory /home/broi/QtSDK/Examples/QtMobility/annotatedurl-build-simulator-Simulator_Qt_for_GCC__Qt_SDK__Release'
19:56:28: The process "/usr/bin/make" exited with code 2.
Error while building project annotatedurl (target: Qt Simulator)
When executing build step 'Make'
[/code]
I have libpng installed.

I'm using Linux 32bit

broadpeak

Hope this helps:
http://doc.qt.nokia.com/4.7-snapshot/requirements-x11.html

broi

Thanks, but I already have installed those dependencies...

broadpeak

Hm. Interesting. I use Ubuntu 10.04. I had installed the dependency packages and after this I installed the Qt SDK and I have had no problems with Examples and Demos... Maybe you have problem with PATH?

broi

[quote author="broadpeak" date="1331629588"]Hm. Interesting. I use Ubuntu 10.04. I had installed the dependency packages and after this I installed the Qt SDK and I have had no problems with Examples and Demos... Maybe you have problem with PATH?[/quote]

I guess..... How to fix PATH?

broadpeak

This?:
http://doc.qt.nokia.com/qtcreator-2.4/creator-project-qmake.html

broi

sweet gtk.

tobias.hunger

Run ldd on the library and find out whether any libraries are missing.

If so: Install them (including the development packages!) and/or set LD_LIBRARY_PATH to point to the directories containing the .so files needed.

If all libraries are found: The png shipped with your distribution is too old (or new, IIRC there was a binary breakage in libPNG recently) and you will need to build Qt yourself to fix this. You can also try to get Qt from your distributor, they should have one that works for their system.