Update...
I tried running the debugger (both with and without the -mconsole line in build.xml) as follows - gdb inkscape symbol-file inkscape.dbg run
Inkscape opens but then locks up and the following debug output appears -
============================================================= Starting program: C:\inkscape-cvs\inkscape\inkscape/inkscape.exe [New thread 3396.0xbf0] [New thread 3396.0xd6c] warning: HEAP[inkscape.exe]: warning: Heap block at 0764D8A0 modified at 0764D898 past requested size of ffff fff0
Program received signal SIGTRAP, Trace/breakpoint trap. 0x7c90120f in ntdll!DbgUiConnectToDbg () from C:\WINDOWS\system32\ntdll.dll (gdb) C:\inkscape-cvs\inkscape\inkscape> =============================================================
I hope this helps,
Tony