Two small ecj tweaks

[Andrew John Hughes]

On 01/12/2008, Mark Wielaard <mark at klomp.org> wrote:
> Hi Andrew,
>
>
>  On Mon, 2008-12-01 at 03:06 +0000, Andrew John Hughes wrote:
>  > 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.  I patched the Gentoo build today to pass
>  > -Dgnu.gcj.precompiled.db.path=$(gcj-dbtool -p) to @JAVA@ and it gave a
>  > very noticeable speedup.
>
>
> That is actually surprising. If there is a default system database then
>  should be picked up automatically by gij. You should only need
>  gnu.gcj.precompiled.db.path if you use an alternative database.
>
>  Cheers,
>
>
>  Mark
>
>

Yes, I was surprised too.  I'd assumed that adding the mapping to the
default database would solve the issue on Gentoo, but lsof showed the
so file was only accessed when I added this.  The Debian script also
includes it:

    exec /usr/bin/gij-$ver \
        -Dgnu.gcj.precompiled.db.path=/var/lib/gcj-$ver/classmap.db \
        -Djava.ext.dirs=/usr/lib/java-ext:/usr/share/java-ext \
        org.eclipse.jdt.internal.compiler.batch.Main $bcoption ${1+"$@"}

-- 
Andrew :-)

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