[avr-gcc-list] WinAVR - gcc 3.4.6 - AVR Studio - DuoCore PC - Stackpointer problem

[Steffen Rose]

Hello,

our Sourcecode compiled on different PCs with WinAVR works 
correctly. But we have one PC, where compiled the same Source, 
the binary is corrupt. If this binary flashed on a AT90CAN128, 
the Stackpointer Highbyte will corrupt anytime.

On the same binary the problem is after the same actions. After 
little changes the needed actions are different. Every time on 
debugging the problem is after a function entry if the Stack 
frame for the local variables will calculate. Y is correct (AVR 
Studio syntax - frame pointer), SPH is wrong.

The PC is an DuoCore PC. The corrupt compilation is done with the 
AVR Studio IDE and WinAVR with avr-gcc 3.4.6.

The working compilation is done on "SingleCore" PCs with cygwin 
make (complete cygwin, not the minimal version from WinAVR).

The Option -O0 and -Os with and without -mcall-prologues have the 
same effect in this case.

Code generation depend options:
-mmcu=at90can128 -std=gnu99 -Os -mcall-prologues -funsigned-char 
-funsigned-bitfields -fpack-struct -fshort-enums

Have anyone see a similar problem and can give a hint, what we 
can check?

-- 
Regards
Steffen Rose