"multiple definitions" when linking

[Gleb Belov <bg@xxxxxxxxxxxxxxxxxx>]

Hello,

when linking I obtain

/home/nm2/belov/prj/COIN/Examples/Csp2/Linux-g_-ffunction-sections_-fdata-sections_-fvtable-gc_--gc-sections/bg_mydebug.o(.data+0x0):bg_src/bg_mydebug.cpp:8: 
multiple definition of `outputLevel'
/home/nm2/belov/prj/COIN/Examples/Csp2/Linux-g_-ffunction-sections_-fdata-sections_-fvtable-gc_--gc-sections/bg_mydebug.o(.data+0x0):bg_src/bg_mydebug.cpp:8: 
first defined here

i.e. the variable is defined only once in bg_mydebug.cpp line 8 but... ???
I tried G++ 3.3.3 and 4.0.1

Can anyone help?

Gleb