Re: Add .jar-s instead of source directories to compile path.]

[Andrew Cagney <cagney at redhat dot com>]

Mark Wielaard wrote:
> Hi Andrew,
>
> On Mon, 2007-12-03 at 18:40 -0500, Andrew Cagney wrote:
>   
> > This tweaks the way the compiler is run so that it is forced to look in 
> > .jars for pre-compiled .class files (and not accidently re-compile a 
> > .java file).  (tks to tromey for figuring out the problem).
> >
> > With this in place, I'm able to built frysk on f8 with the 
> > --enable-jar-compile option.  That option enables the "faster" sequence 
> > .java->.class->.jar->.o vs the slower .java->.o path.  Going forward 
> > this option is likely to be made the default.
> >     
>
> Seems nice. time (../frysk/autogen.sh --enable-jar-compile && make -j4)
> (x86_64, fedora 8, dual core 3.2Ghz) now takes:
>
> real    7m57.600s
> user    8m16.352s
> sys     2m8.085s
>
> That is almost half the time it takes without --enable-jar-compile.
>   
I forgot to mention, since it always does a full re-compile, the results 
are more robust on >=f7 (where gcj's dependency mechanism is broken).

Andrew

>