sorry for the noise, my path was messed up. got even farther, but:
g++ -I.. -I/usr/include/qt -I/opt/Qtopia/include -L/opt/lib -L/opt/Qtopia/lib -L/opt/Qtopia/sharp/lib -I/usr/include/glib-1.2 -I/usr/lib/glib/include -O2 -ffast-math -fomit-frame-pointer -g -Wall -fno-rtti -fno-exceptions -pipe -c -o roadmap_fileselection.o roadmap_fileselection.cc
roadmap_fileselection.cc: In function `void roadmap_fileselection_new(const
char*, const char*, const char*, const char*, void (*)(const char*, const
char*))\':
roadmap_fileselection.cc:46: error: invalid use of undefined type `struct
QFileDialog\'
/opt/Qtopia/include/qfiledialog.h:45: error: forward declaration of `struct
QFileDialog\'
.
.