some gdb problem.

[zouq]

i write a simple front-end, i try to gdb it

gdb ./mycc1
run test.try

and the following messages come:
During symbol reading, Incomplete CFI data; unspecified registers at
0x0804a435.
During symbol reading, Incomplete CFI data; unspecified registers at
0x0804a435.
During symbol reading, Incomplete CFI data; unspecified registers at
0x0804a435.
During symbol reading, Incomplete CFI data; unspecified registers at
0x0804a435.
During symbol reading, Incomplete CFI data; unspecified registers at
0x0804a435.
During symbol reading, Incomplete CFI data; unspecified registers at
0x0804a435.
During symbol reading, Incomplete CFI data; unspecified registers at
0x0804a435.
During symbol reading, Incomplete CFI data; unspecified registers at
0x0804a435.
During symbol reading, Incomplete CFI data; unspecified registers at
0x0804a435.
During symbol reading, Incomplete CFI data; unspecified registers at
0x0804a435.
During symbol reading, Incomplete CFI data; unspecified registers at
0x0804a435.
During symbol reading, Incomplete CFI data; unspecified registers at
0x0804a435.


who can tell me the reason?
thanks!