icedtea-1.14 JamVM + OpenJDK 7 -version patch

[Xerxes Rånby]

Hi!

Today i tested to build JamVM + OpenJDK 7 using the newly released
icedtea-1.14 
http://icedtea.classpath.org/download/source/icedtea-1.14.tar.gz
that contains all JamVM build scripts from icedtea6.


After some patching the JamVM + OpenJDK 7 combination builds and now
passes java -version and java -help

icedtea-1.14/openjdk.build/j2sdk-image/bin/java -version
java version "1.7.0_136-icedtea"
IcedTea7 Runtime Environment (1.14) (Ubuntu build
1.7.0_136-icedtea-b136)
JamVM (build 1.6.0-devel, inline-threaded interpreter with
stack-caching)



* jamvm-oj7.patch :
OpenJDK7 complained that JVM_FindClassFromBootLoader not found inside
the jamvm libjvm.so, a new JVM API in OpenJDK 7, the attached patch fix
by implementing it using jamvm's internal findSystemClass0 method.


* icedtea-1.14-jamvm.patch :
I had to do some tweaks to the icedtea-1.14 Makefile.am all contained in
the icedtea-1.14-jamvm.patch because of a silly issue the jamvm sources
did not get extracted before patching.
This patch also makes it possible to rerun the stamps/jamvm.stamp by
adding -f to ln so that it can replace the symlink if its allready
there.
OpenJDK 7 have added a check if the "unused by jamvm" libjsig.so
actually are a valid .so file, so instead of simply touching it i simply
created a link to the built libjvm.so created by stamps/jamvm.stamp.


I configured my icedtea-1.14 build using
./configure --enable-jamvm --disable-system-lcms --disable-bootstrap

Cheers
Xerxes
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