I have to compile project to 32-bit platform on OpenSuse 11.4 x86_64.
I set qmake options: -r -spec linux-g++-32.
Compiler is linking libs rom /usr/lib64 instead of /usr/lib returning errors:
Qt Code: 
  1. g++ -m32 -o test-32 main.o mainwindow.o moc_mainwindow.o    -L/usr/lib64 -lQtSql -L/usr/lib64 -lQtGui -L/usr/X11R6/lib64 -lQtCore -lpthread 
  2. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /usr/lib64/libQtSql.so when searching for -lQtSql
  3. make: Opuszczenie katalogu `/home/neon/workspace/qt4/test-32-build-desktop'
  4. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /usr/lib64/libQtSql.so when searching for -lQtSql
  5. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../libQtSql.so when searching for -lQtSql
  6. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /usr/lib64/libQtSql.so when searching for -lQtSql
  7. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: cannot find -lQtSql
  8. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /usr/lib64/libQtGui.so when searching for -lQtGui
  9. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /usr/lib64/libQtGui.so when searching for -lQtGui
  10. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../libQtGui.so when searching for -lQtGui
  11. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /usr/lib64/libQtGui.so when searching for -lQtGui
  12. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: cannot find -lQtGui
  13. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /usr/lib64/libQtCore.so when searching for -lQtCore
  14. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /usr/lib64/libQtCore.so when searching for -lQtCore
  15. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../libQtCore.so when searching for -lQtCore
  16. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /usr/lib64/libQtCore.so when searching for -lQtCore
  17. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: cannot find -lQtCore
  18. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /usr/lib64/libpthread.so when searching for -lpthread
  19. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /usr/lib64/libpthread.a when searching for -lpthread
  20. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /usr/lib64/libpthread.so when searching for -lpthread
  21. /usr/lib64/gcc/x86_64-suse-linux/4.5/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /usr/lib64/libpthread.a when searching for -lpthread
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I have installed 32-bit qt4 libs. How to build 32-bit app on 64-bit system?

PS: On second computer with fedora everything is working correct.