Setup: a freshly installed qt 4.6.1, eclipse, mingw on win 7. After install I ran configure.

the app is a gui widget with a button and labels, a threaded class that is run when the button is pushed, rersults are shown with the labels.
Debug compile works fine. When I want to compile the release I get:

Qt Code:
  1. c:\Qt\4.6.1\lib/libqtmain.a(qtmain_win.o):qtmain_win.cpp:(.text+0x1c2): undefined reference to `_Unwind_Resume'
  2. mingw32-make[1]: Leaving directory `D:/prgc/erosmod4'
  3. c:\Qt\4.6.1\lib/libqtmain.a(qtmain_win.o):qtmain_win.cpp:(.text$_ZN7QVectorIPcE7reallocEii[QVector<char*>::realloc(int, int)]+0x187): undefined reference to `_Unwind_Resume'
  4. c:\Qt\4.6.1\lib/libqtmain.a(qtmain_win.o):qtmain_win.cpp:(.eh_frame+0x12): undefined reference to `__gxx_personality_v0'
  5. collect2: ld returned 1 exit status
  6. mingw32-make[1]: *** [release\erosmod4.exe] Error 1
  7. mingw32-make: *** [release] Error 2
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any advice?