[Bug java/41802] When attempting to compile pdftk-1.41 my machine comes to a grind

["rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #5 from rguenth at gcc dot gnu dot org  2010-02-10 20:47 -------
(In reply to comment #4)
> (In reply to comment #3)
> > (In reply to comment #2)
> > > ecj1 is really the Eclipse frontend which we just inherit, the GCC java
> > > frontend (which just handles bytecode) is called jc1.
> > 
> > Why starting from gcc 4.3 jc1 handles only bytecode and no more java source?
> > 
> > > This bug also misses a testcase to reproduce the problem.
> > 
> > You can reproduce the problem only into x86_64 platform:
> > 1. Download pdftk http://www.pdfhacks.com/pdftk/pdftk-1.41.tar.bz2
> > 2. cd pdftk-1.41/java_libs/com/lowagie/text
> > 3. gcj -O2 -w --classpath="../../../" -c Anchor.java -o Anchor.o
> > 4. ecj1 allocates about 4.2GB of memory
> > 5. If you have enough memory (I have 2GB RAM + 3GB swap), compilation ends
> > successfully, even if after many time due to swapping.
> > 
> > ecj1 on x86_32 (same gcc version and build options) or jc1 on x86_64 (gcc
> > 4.2.4) require only about 85 MB of memory.
> > 
> > > You can a more recent ecj version, like that which is downloaded by
> > > the contrib/download_ecj.
> > 
> > ecj-4.5.jar (actually the latest ecj) does not resolve the problem. 
> > 
> > > Well - not really a GCC bug.
> > 
> > Ok, but we have no other options to compile java sources with gcc 4.3 (only
> > downgrade to 4.2)... 
> 
> Use another Java-to-bytecode compiler and feed gcc with bytecode.

Btw, the symptoms you are seeing hint at not working garbage collection.
You might want to report this to your operating system vendor.

Richard.

> Richard.
> 


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41802