VM-specific options should only conditionally be inserted to eclipse.ini

[stephan]

Currently we are adding two options to eclipse.ini that are specific to the Sun JVM: -XX:+UnlockDiagnosticVMOptions and -XX:+UnsyncloadClass.

It appears that these options may cause a failure to launch the OTDT on MacOS, although normally the JVM should simply ignore any -XX options which it cannot understand.

workaround: manually delete these options from eclipse.ini after installing the OTDT.

Obviously, these options shouldn't be added to eclipse.ini in the first place when running on a platform other than the Sun JVM. Thus we need to investigate if such conditional actions are possible using p2.

[stephan]

Attempted workaround is in r21610:

• after asking on the equinox newsgroup let's use a dual strategy:
  • promote the introduction of conditional touchpoint actions (not supported yet)
  • avoid the problem by an os-specific fragment

The new fragment org.objectteams.otequinox.sunjvm is installed only on these operating systems:

• linux
• win32
• solaris

I am assuming that on those OS's the SunJVM might be used -> install the Sun-specific vm-flags. On other OS's don't. Other than its MANIFEST.MF and p2.inf this fragment is empty.