Re: jc1 out of memory error gcc 4.2.2 Linux 64-bit OS

[Andrew Haley <aph at redhat dot com>]

Harpal Grover writes:
 > On Jan 14, 2008 5:09 AM, Andrew Haley <aph@redhat.com> wrote:
 > >
 > > Harpal Grover writes:
 > >  > Hello all,
 > >  >
 > >  > I downloaded and built gcc 4.2.2 on my linux box. I have also used the
 > >  > sources to build a cross compiler using Ranjit's Matthews guide.  The
 > >  > build went just fine. I tried to compile my java application and got
 > >  > the following error:
 > >  >
 > >  > c1: out of memory allocating 4064 bytes after a total of 3909824512 bytes
 > >  >
 > >  > The specs on my laptop are as follows:
 > >  > Intel Core 2 Duo
 > >  > Suse 10.2 64-bit
 > >  > Linux 2.6.18.2-34-default #1 SMP Mon Nov 27 11:46:27 UTC 2006 x86_64
 > >  > x86_64 x86_64 GNU/Linux
 > >  > 4 GB Ram
 > >  >
 > >  > jc1 spiked from 1 gig of memory to close to 4gb, eats up the swap and
 > >  > then finally crashes. Is there any additional information you guys
 > >  > would like me to provide? If so please feel free to let me know and I
 > >  > gladly will.
 > >
 > > I want to know what you were trying to compile.
 > >
 > > Andrew.
 > 
 > Hello
 > 
 > I am trying to compile a java app. I don't have the script in front of
 > me that i am using because I am at a client's office right now. The
 > jist of
 > the command line is as follows:
 > 
 > gcj -O -fjni -s -main=main.App --classpath=x1.jar x2.jar x3.jar x4.jar
 > x5.jar x6.jar x7.jar x8.jar -o scln.exe class1.java class2.java
 > class3.java ... class125.java -ly -ldz

This is very likely to cause out of memory errors.  This will probably
work better:

gcj -c -O -fjni --classpath=x1.jar x2.jar
gcj -c -O -fjni --classpath=x1.jar x3.jar
gcj -c -O -fjni --classpath=x1.jar x4.jar

And link them all together at the end.

 > So, this was fine compiling on Windows using a Native Cross Compiler
 > provided by Mohan Embar on a 32 bit processor. After upgrading my
 > hardware to a 64 bit processor, things were not working as pleasant as
 > I was hoping for.

That is pretty bizarre.  Some weirdness to do with memory allocation
on the 64-bit box, maybe.

 > After some deliberation, I decided to build a cross compiler on
 > Linux using Ranjit Matthews tutorial.
 > 
 > Long story short, I contacted Ranjit and Marco Trudel on this matter,
 > and they have encouraged me to take this matter into my own hands. So
 > I am going to get started on debugging this issue tonight. I have been
 > looking for a good excuse to get involved in development for gcc for
 > sometime now and this is a good time.
 > 
 > Marco has confirmed this issue seems to be isolated to 64 bit
 > processors. I am new to this, so from my understanding gdb is the
 > debugging tool i am going to
 > want to use. As for IDE, what do you recommend? You must keep in mind
 > I am quite spoiled by such IDE's as Eclipse and Borland :P, so I
 > though KDevelop may be suit my needs? And any advice, or direction is
 > gladly welcomed.

I use emacs, but it's a steep learning curve.  I understand that
Eclipse works OK with gcc.

Andrew.

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