Re: ant with gcc

[Andrew Haley <aph@redhat.com>]

David Michel wrote:

> I have an issue with using ant with gcc:
> 
> While with Sun, I can simply set JAVA_HOME as such: export
> JAVA_HOME=/usr/lib/jvm/java-6-sun-1.6.0.14/
> so that ant can find /usr/lib/jvm/java-6-sun-1.6.0.14/lib/tools.jar
> (which is essentially $JAVA_HOME/lib/tools.jar)
> 
> Somehow, I have trouble to do the same with my install of gcc:
> 
> 'locate tools.jar' returns
> '/local/gcc-4_4-branch/install/lib/jvm/lib/tools.jar' so that I've
> put: export JAVA_HOME=/local/gcc-4_4-branch/install/lib/jvm/
> 
> But then, I get this:
> 
> $ ant
> Unable to locate tools.jar. Expected to find it in
> /local/gcc-4_4-branch/install/lib/tools.jar
> Buildfile: build.xml does not exist!
> Build failed
> 
> Any clues ?

Ant makes some assumptions about the layout of an installed Java runtime.
There are two ways you can solve this problem with gcj.

1.  If you are building and installing gcc from source, it can
create a JAVA_HOME directory:

`--enable-java-home'
     If enabled, this creates a JPackage compatible SDK environment
     during install.  Note that if -enable-java-home is used,
     -with-arch-directory=ARCH must also be specified.

`--with-arch-directory=ARCH'
     Specifies the name to use for the `jre/lib/ARCH' directory in the
     SDK environment created when -enable-java-home is passed. Typical
     names for this directory include i386, amd64, ia64, etc.

2.  If you are running on a GNU/Linux distro like Fedora, install
the java-1.5.0-gcj package or its equivalent.

Andrew.