Are there known issues among the -pg and -O3 and -mcu=arm9020t options ?  

I am using Gcc 3.3.5 on Debian 1:3.3.5-13, running on a Technologic systems
TS-7200 board with an Arm920T processor.  

Compiling a medium size program (~ 1.5mb source code) with flags
    -O3 -mcu=arm920t -Wall
I get no errors/warnings, and the program runs to completion w/o error

Yet compiling with the flags
    -O3 -pg -mcu=arm920t -Wall
produces no errors/warnings, butproduces Segment errors at runtime -- the location of the error varies; which is unusual as the program is deterministic.

And compiling with the flags
    -O3 -g -mcu=arm920t -Wall
produces no errors/warnings, and runs to completion (either at command line or inside gdb) w/o error.


fiy ... compiling the program with these sets of flags
    -mcu-arm920t -Wall
and
    -03 -mcu=arm920t -Wall
compile with no errors/warnings, run to completion w/o error, and and produces identical large (~2gB) regression test output.


If there are no known issues among these flags, I'll work to get a smaller code base which will reproduce the bug.

thanks...