mingw and gtkmm

[bruce hawaii-pacific com]

Aloha,

I am using ubuntu-10.10 and have installed the mingw crosscompiler 
available with synaptics.  I can compile a simple console app with no 
problems.  But when I try to cross compile a gtkmm app with mingw I 
always get errors.  It compiles fine with g++ but not i586-mingw32msvc-g++.
My latest and most successful effort is using code::blocks.  The errors 
I am getting now are:

/usr/include/glib-2.0/gio/gcredentials.h:67: error: ‘uid_t’ does not 
name a type

'uid_t' is defined in /usr/i586-mingw32msvc/include/sys/types.h

Can anyone help?  If you need more info I can supply it.

Thanks
Bruce