[Sdcc-user] Disabling any optimization in SDCC

[Felix B. <fb...@lt...>]

Hello All,

I am using sdcc for about 1.5 years now (currently 2.5.0). Compared to
a commercial compiler that I used before, I never had problems with SDCC,
especially when it comes to support. Until the present day any code
was flashed onto a hardware that had neither in circuit debugging nor
an emulator.

Now I did switch to some Silabs CPU (C8051F132) which has so called
none intrusive in circuit debugging. So this is the very first time I
need debugging information generated by sdcc and now I do have a
problem: no matter what kind of optimization (or all of them) I
disable, the code is extremely difficult to debug. As it seems there is
no switch to tell SDCC not to optimize at all, so I would be able to
debug the following code:

int main(void) {
    int a, b, c;

    a= 1;
    b= 2;
    c= a + b;
    return 0;
}

With GCC for instance I just remove any optimization flag and can
debug that code. Of course the code above is not what I would
like to debug but it shows the my problem very precisely.

Somewhere on the web I found the following tip: 'use absolute
addressing for the variables if you want to debug with sdcc' !
Using absolute addressing just to trick sdcc's optimizer? No, really
not what I would like to do.

Is there any other switch to make sdcc generate code (and debugging
information) for the source above?

many thanks,

-------------------------

Felix