On Tue, Jan 26, 2010 at 06:16:35PM -0800, John Rose wrote:
> One of the significant differences between the makefiles for linux and bsd is
> this:
>
> -ifdef LIBRARY
> - # Libraries need to locate other libraries at runtime, and you can tell
> - # a library where to look by way of the dynamic runpaths (RPATH or
> RUNPATH)
> - # buried inside the .so. The $ORIGIN says to look relative to where
> - # the library itself is and it can be followed with relative paths from
> - # that. By default we always look in $ORIGIN, optionally we add relative
> - # paths if the Makefile sets LD_RUNPATH_EXTRAS to those relative paths.
> - # On Linux we add a flag -z origin, not sure if this is necessary, but
> - # doesn't seem to hurt.
> - # The environment variable LD_LIBRARY_PATH will over-ride these runpaths.
> - # Try: 'readelf -d lib*.so' to see these settings in a library.
> - #
> - LDFLAGS_COMMON += -Xlinker -z -Xlinker origin -Xlinker -rpath -Xlinker
> \$$ORIGIN
> - LDFLAGS_COMMON += $(LD_RUNPATH_EXTRAS:%=-Xlinker -z -Xlinker origin
> -Xlinker -rpath -Xlinker \$$ORIGIN/%)
> -endif
>
> (See output of "diff -u make/common/Defs-{linux,bsd}.gmk".)
>
> I don't know if there is an equivalent BSD dyld feature for Solaris
> and Linux $ORIGIN, but the lack of it, or the lack of use of it,
> may be causing the problem we are seeing.
>
> The $ORIGIN hack seems like the sort of thing which Mac OS X would do
> better; does anyone know the Mac or BSD story here?
>
> The original version of the BSD file omits mention of LD_RUNPATH_EXTRAS,
> while the original version of linux and solaris files has it, so it's
> hard to tell who to ask about the change.
I seem to recall leaving this out because the MacOS X linker didn't
understand these flags. At that point things were working without them
so I didn't want to spend the time investigating further to see if there
were equivalent flags. Sorry.
> On Jan 25, 2010, at 6:51 PM, John Rose wrote:
>
> > I asked around at the office, and here's a possible root of the problem:
> > http://hg.openjdk.java.net/bsd-port/bsd-port/jdk/rev/de45eac5670e
> >
> > The launcher (java.c in the jdk repo) used to re-exec itself with
> > LD_LIBRARY_PATH bindings, so the libjvm and libjava DLLs could find each
> > other. This trick was always awkward, and has been removed.
> >
> > Now the various DLLs have their pathnames baked into them at compile time,
> > as *relative* paths. Perhaps this logic needs extra porting, or maybe
> > there is a difference in behavior w.r.t. relative DLL paths on Mac OS. The
> > error message (which comes from libjvm code) suggests that the launcher
> > finds libjvm OK, and libjvm can find libjava OK, but when libjvm tries to
> > open libjava, the reverse references from libjava to libjvm don't resolve
> > properly, and the dlopen fails.
> >
> > -- John
> >
> > On Jan 19, 2010, at 7:38 AM, Stephen Bannasch wrote:
> >
> >>> I built JDK7 today based on these instructions
> >>> http://wikis.sun.com/display/OpenJDK/Darwin9Build
> >>>
> >>> I'm experiencing the same problem.
> >>>
> >>
> >> One possible clue is that the libjava.dylib files itself doesn't appear to
> >> be the problem.
> >>
> >> This is the latest build I have that doesn't work:
> >>
> >> [local]$ java-1.7.0-internal-2010_01_18/bin/java -version
> >> Error occurred during initialization of VM
> >> Unable to load native library:
> >> dlopen(/usr/local/java-1.7.0-internal-2010_01_18/jre/lib/i386/libjava.dylib,
> >> 1): Library not loaded: libjvm.dylib
> >> Referenced from:
> >> /usr/local/java-1.7.0-internal-2010_01_18/jre/lib/i386/libjava.dylib
> >> Reason: image not found
> >>
> >> Here's a build from Dec 26 that does work:
> >>
> >> [local]$ java-1.7.0-internal-2009_12_26/bin/java -version
> >> openjdk version "1.7.0-internal"
> >> OpenJDK Runtime Environment (build
> >> 1.7.0-internal-stephen_2009_12_26_16_00-b00)
> >> OpenJDK Server VM (build 17.0-b05, mixed mode)
> >>
> >> libjava.dylib is identical:
> >>
> >> [local]$ diff java-1.7.0-internal-2010_01_18/jre/lib/i386/libjava.dylib
> >> java-1.7.0-internal-2009_12_26/jre/lib/i386/libjava.dylib
> >>
> >> However the bin/java files differ.
> >>
> >>
> >
> >
>
>
--
Greg Lewis Email : gle...@eyesbeyond.com
Eyes Beyond Web : http://www.eyesbeyond.com
Information Technology FreeBSD : gle...@freebsd.org
