Anybody happen to know what the best way to handle builds against
Oracle's JDKs? They don't use a framework, there's not an unversioned
link anywhere so using hardcoded paths is fragile, and the preferred
method of @rpath is problematic because of those hardcoded paths--in
particular I'm thinking about libjvm.dylib, which typically has the
following:
$ otool -L
/Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home/jre/lib/server/libjvm.dylib
/Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home/jre/lib/server/libjvm.dylib:
@rpath/libjvm.dylib (compatibility version 1.0.0, current version 1.0.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current
version 159.1.0)
/usr/lib/libstdc++.6.dylib (compatibility version 7.0.0, current
version 52.0.0)
If newer Java versions (at least minor version changes, anyway) are
supposed to be back-compatible, then I'd think that we'd want packages
to be able to switch to a newer version freely.
Options which have been suggested or have occurred to me are:
1) Have a policy that we only support Apple's Java framework. This is
probably not ideal.
2) Use install_name_tool on libraries to use the unversioned library
from the Oracle JRE, which is is installed in /Library/Internet
Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/ . However, this is a
separate install from the JDK, and we don't track it in the virtual
package system.
3) Use wrapper scripts for executables which the lookup path to the
latest Java via the output from "/usr/libexec/java_home", e.g. via
LD_LIBRARY_PATH or DYLD_LIBRARY_FALLBACK_PATH.
4) Have a fink "system" package which sets up links in %p/lib to the
various Java libraries in whatever the latest installed Java is.
Ideally, it'd be nice to have the option to set up a schedule for such a
package to check whether a newer JDK has been installed and then update
the links.
5+) ?
--
Alexander Hansen, Ph.D.
Fink User Liaison
My package updates: http://finkakh.wordpress.com/
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