IcedTea/OpenJDK bootstrapping issue

[Ludovic Courtès]

Hi,

Reviving an old thread...

Michal Vyskocil <mvyskocil at suse.cz> writes:

> On Monday 08 March 2010 02:08:20 pm Ludovic Courtès wrote:
>> Hi,
>> 
>> Andrew John Hughes <gnu_andrew at member.fsf.org> writes:
>> > 2010/1/21 Ludovic Courtès <ludo at gnu.org>:
>> >> Andrew John Hughes <gnu_andrew at member.fsf.org> writes:
>> [...]
>> 
>> >>> Does ant work for you with other builds?
>> >> 
>> >> Yes.  This version of Ant was built with GCJ.  It was then used to
>> >> compile things like Xalan, Xerces, and Rhino.
>> > 
>> > It seems something is broken with regard to Ant.  The fact it's
>> > looking for tools.jar in your gcj home directory rather than
>> > bootstrap/jdk1.6.0 suggests it's ignoring the setting of
>> > bootstrap.java.home.  Have you checked that bootstrap/jd1.6.0 has a
>> > valid jar file in jre/lib/rt.jar?  I would guess it does as the
>> > earlier stages have worked, but Ant is reverting to your system
>> > install.
>> 
>> Perhaps I should have started with this: how did you build the Ant
>> that’s used to build IcedTea?
>> 
>> I built it with GCJ, but Ant’s manual says it isn’t supported [0].
>> I patched ‘build.properties’ to set ‘build.compiler’ to ‘gcj’ [1].  In
>> addition I have gross hacks to make gcj/gij available as javac/java
>> while building Ant itself [2].
>
> The easiest way is simulate the Sun layout - see 
>
> http://sources.redhat.com/rhug/java-gcj-compat.html
> ftp://sources.redhat.com/pub/rhug/java-gcj-compat
>
> It create a structure similar to Sun's layout, so you don't need patch 
> anything, just use java-gcj-compat-devel as a build dependency. Not sure if 
> the gcj 4.4 layout support Andrew mentioned does not obsolete it.

With GCJ 4.5 compiled with --enable-java-home, etc. (as mentioned in
this thread) the resulting Ant happily finds tools.jar.

However, Ant ignores the ‘javac.executable’ property, thus leading it to
keep using GCJ instead of the bootstrap javac while building IcedTea:

--8<---------------cut here---------------start------------->8---
ANT_OPTS=-Djava.io.tmpdir='/tmp/nix-build-is9x5fclzbsh79zpy2hgrw1d3izkylf9-icedtea6-1.6.1.drv-0/icedtea6-1.6.1/openjdk-ecj/build/linux-amd64/langtools/build/ant-tmp' ant -Djdk.version=1.6.0_0 -Dfull.version='1.6.0_0-b16'  -Drelease=1.6.0_0 -Dbuild.number=b16 -Djavac.debug=true -Djavac.target=5 -Dboot.java.home=/tmp/nix-build-is9x5fclzbsh79zpy2hgrw1d3izkylf9-icedtea6-1.6.1.drv-0/icedtea6-1.6.1/bootstrap/jdk1.6.0 -Djavac.executable=/tmp/nix-build-is9x5fclzbsh79zpy2hgrw1d3izkylf9-icedtea6-1.6.1.drv-0/icedtea6-1.6.1/bootstrap/jdk1.6.0/bin/javac -Dbuild.dir=/tmp/nix-build-is9x5fclzbsh79zpy2hgrw1d3izkylf9-icedtea6-1.6.1.drv-0/icedtea6-1.6.1/openjdk-ecj/build/linux-amd64/langtools/build -Ddist.dir=/tmp/nix-build-is9x5fclzbsh79zpy2hgrw1d3izkylf9-icedtea6-1.6.1.drv-0/icedtea6-1.6.1/openjdk-ecj/build/linux-amd64/langtools/dist -Dfindbugs.home=/NOT-SET/devtools/share/findbugs/latest build
Buildfile: build.xml

-def-check:

-check-boot.java.home:

-def-pcompile:
    [mkdir] Created dir: /tmp/nix-build-is9x5fclzbsh79zpy2hgrw1d3izkylf9-icedtea6-1.6.1.drv-0/icedtea6-1.6.1/openjdk-ecj/build/linux-amd64/langtools/build/toolclasses
    [javac] Compiling 2 source files to /tmp/nix-build-is9x5fclzbsh79zpy2hgrw1d3izkylf9-icedtea6-1.6.1.drv-0/icedtea6-1.6.1/openjdk-ecj/build/linux-amd64/langtools/build/toolclasses
    [javac] ----------
    [javac] 1. ERROR in /tmp/nix-build-is9x5fclzbsh79zpy2hgrw1d3izkylf9-icedtea6-1.6.1.drv-0/icedtea6-1.6.1/openjdk-ecj/langtools/make/tools/CompileProperties/CompileProperties.java (at line 1)
    [javac] 	/*
    [javac] 	^
    [javac] The type java.lang.Object cannot be resolved. It is indirectly referenced from required .class files
--8<---------------cut here---------------end--------------->8---

$ANT_OPTS above points it to the bootstrap javac, which was successfully
built, but Ant uses GCJ anyway.

This is with Ant 1.7.1.

Can someone point me to instructions to build Ant as used for building
IcedTea?

Thanks,
Ludo’.