[fpc-devel] FPC 2.2.2 on Linux/SPARC

[Mark Morgan Lloyd]

Jonas Maebe wrote:
> On 11 Sep 2008, at 15:02, Mark Morgan Lloyd wrote:

>> I've had no success trying to drive fpc interactively across ttys to get
>> to the point of failure.
> 
> Indeed, the tty redirection doesn't work very will in combination with 
> raw terminal modes.

After experimentation I was able to do better without redirection but 
logging to file.

>> If I'm interpreting that correctly then either the command blocks in 
>> #14 and #13 are wrong when the Pascal code is optimised (I have not 
>> recompiled the GDB interface library), or find_pc_sect_line is finding 
>> something it doesn't like. In case it's the former here are the full 
>> lines:
> 
> I don't see what's wrong in the code at first sight. The command in 
> frame 14 already seems wrong though, since frame 15 is gdbcon.pp:251, 
> wich should pass 'run' rather than 'cd ' to gdb (the 'cd ' stuff comes 
> from gdbcon.pp:195).
> 
> But I'm not an IDE developer in any way, I'm purely a compiler/rtl 
> person. There are few IDE developers left though.

OK, but your recognition of something wrong in the gdb command blocks 
seems to suggest that fpc is mis-compiling  the fp IDE when optimisation 
is enabled. I find that if I copy a non-optimised fp over an optimised 
one (i.e. with fpc and all ppus being optimised) then fp drives the 
debugger properly- at least as far as I've been able to test it.

I've run the test suite for the compiler with and without optimisation, 
so far I don't see any revealing differences in the output but I might 
be overlooking something significant due to inexperience.

-- 
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk

[Opinions above are the author's, not those of his employers or colleagues]