compilation problems with ecj.jar

[Marco Trudel]

Andrew Haley wrote:
> [snip]
> 
>  > > Nevertheless, this command does work for me, producing ecjx.  It needs
>  > > a lot of memory to compile, though.  Perhaps you're running out of
>  > > memory.
>  > 
>  > Yes, I think you're right. I tried a couple of times and sometimes got 
>  > "virtual memory exhausted: Cannot allocate memory", even if I removed 
>  > optimization. How much RAM do you have? I have 1gb RAM and 2gb swap. I'm 
>  > somewhat surprised that that's not enough or at least not enough without 
>  > optimization...
> 
> The compilation process peaks at about 1.5G of RAM on my system.

Strange, how can it then be that 3gb are not enough on mine?


> This
> really only bites on --disable-shared builds.  To fix this you can
> either split the compilation into parts or replace ecjx with a simple
> shell script that launches ecj.

The second one seems interesting. Can you explain that further? I have 
no background knowledge of ecj. I would assume that you mean this:
- Compile gcj without the ecj.jar in the source dir (works)
- Create a script that launches ecj.jar, name it ecj and put it into the 
dir of gcj
- gcj will call it automatically for .java source input

Is this more or less correct?


thanks
Marco

PS: I'll try to compile a static GCJ with ecj.jar on a machine with 10gb 
swap. I'll report if that works...