Two small ecj tweaks

[Andrew John Hughes]

On 01/12/2008, Andrew John Hughes <gnu_andrew at member.fsf.org> wrote:
> On 01/12/2008, Andrew Haley <aph at redhat.com> wrote:
>  > Andrew John Hughes wrote:
>  >  > On 30/11/2008, Mark Wielaard <mark at klomp.org> wrote:
>  >  >> Hi,
>  >  >>
>  >  >>  Two tweaks to make sure we have a fast bootstrap ecj available. This
>  >  >>  makes sure that when we compile the ecj jar with gcj we use
>  >  >>  -findirect-dispatch so any unresolved references in the jar itself don't
>  >  >>  make the compilation fail (like what would happen with the
>  >  >>  eclipse-ecj.jar from fedora 10). Also if we don't have a native-ecj (not
>  >  >>  configured --with-gcj), but we did detect an ecj binary then use that
>  >  >>  first before falling back on full interpretation with gij.
>  >  >>
>  >  >>  2008-11-30  Mark Wielaard  <mark at klomp.org>
>  >  >>
>  >  >>     * Makefile.am (stamps/native-ecj.stamp): Use -findirect-dispatch.
>  >  >>     * javac.in: Use ecj binary if available and no native-ecj.
>  >  >>
>  >  >>  Committed and pushed,
>  >  >>
>  >  >>
>  >  >>  Mark
>  >  >>
>  >  >>
>  >  >
>  >  > Thanks for this.  I still wonder why we detect javac on ecj builds but
>  >  > don't use it any more -- too many issues in the past I guess.
>  >  >
>  >  > I would also suggest possibly adding -Dgnu.gcj.precompiled.db.path to
>  >  > the interpreted invocation.  On at least Debian and Gentoo, the
>  >  > mapping between ecj.jar and ecj.so is stored in the default database
>  >  > but as far as I can see, it doesn't get used unless this option is
>  >  > given.
>  >
>  >
>  > It certainly should.  If you have an example of any case where this fails, please
>  >  let me know and I'll follow it up with the maintainers.
>  >
>  >  I'd like a login so I can see why this isn't working.
>  >
>  >
>  >  Andrew.
>  >
>
>
> Well here's the straces for each:
>
>  strace -f -o out.nodb /usr/lib/jvm/gcj-jdk/bin/java -cp
>  /usr/share/eclipse-ecj-3.3/lib/ecj.jar
>  org.eclipse.jdt.internal.compiler.batch.Main -1.5 Test.java
>
>  strace -f -o out.db /usr/lib/jvm/gcj-jdk/bin/java
>  -Dgnu.gcj.precompiled.db.path=/usr/lib64/gcj-4.3.3-9/classmap.db -cp
>  /usr/share/eclipse-ecj-3.3/lib/ecj.jar
>  org.eclipse.jdt.internal.compiler.batch.Main -1.5 Test.java
>
>  Only out.db includes:
>
>  out.db:16889 open("/usr/lib64/native_ecj-3.3.so", O_RDONLY) = 5
>
>  There is no reference to it in out.nodb.
>
> --
>  Andrew :-)
>
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Forgot the URLs:

http://fuseyism.com/out.db.gz
http://fuseyism.com/out.nodb.gz

-- 
Andrew :-)

Support Free Java!
Contribute to GNU Classpath and the OpenJDK
http://www.gnu.org/software/classpath
http://openjdk.java.net

PGP Key: 94EFD9D8 (http://subkeys.pgp.net)
Fingerprint: F8EF F1EA 401E 2E60 15FA  7927 142C 2591 94EF D9D8