IcedTea with gcc 4.3 and Minimum JDK version

[Sylvain Beucler]

On Fri, Mar 21, 2008 at 12:24:18PM -0400, Michael Franz wrote:
> Hi,
> Since gcc 4.3 has been released, has anyone tried to use it to build
> icedtea/openjdk?
> 
> I had a version of icedtea almost compiling openjdk on my Mac (do to user
> error I lost some of that work).  I have started over and found that Apple's
> Java 6 implementation is using a beta version of JSR 199 so I tried the
> latest version of gcc 4.3.
> 
> gcc 4.3 seems to be missing some String constructors that are in Java 1.6.
>  Specifically I get this error:
> 1. ERROR in
> hotspot-tools/sun/jvmstat/perfdata/monitor/PerfStringMonitor.java (at line
> 103)
>         return new String(b, 0, i, defaultCharset);
>                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> The constructor String(byte[], int, int, Charset) is undefined
> 
> I guess gcc 4.3 will work for meeting the generics requirements, but will
> not work with have the necessary JDK 6 APIs.
> 
> I had tried to get the Redhat branch of 4.2 to compile on my mac - I gave
> up.  I was hoping that gcc 4.3 would solve my problem.
> 
> Previously I had modified the build to build some bootstrap classes from the
> openjdk source, jar them and then add the jar to the front of the classpath.
>  This is a different problem, as the classes that were giving me problems
> were AWT font classes.
> 
> I may have to do the same trick again, I just cannot remember how I did it
> at the moment.

It worked for me with IcedTea6. What arguments are you passing to ./configure?

What I did (short version):
- manually install GCC 4.3 in /opt/gcc-4.3
- manually install java-gcj-compat in /opt/gcc-4.3
- ./configure \
  --with-libgcj-jar=/opt/gcc-4.3.0/share/java/libgcj-4.3.0.jar \
  --with-gcj-home=/opt/gcc-4.3.0/lib/jvm/java-1.5.0-gcj-1.5.0.0 \
  --with-java=/opt/gcc-4.3.0/bin/java --with-jar=/opt/gcc-4.3.0/bin/jar \
    --with-rmic=/opt/gcc-4.3.0/bin/rmic --with-javah=/opt/gcc-4.3.0/bin/javah

-- 
Sylvain