[PATCH] Update RPATH to make loading libjawt possible (original) (raw)

Andrew Haley aph at redhat.com
Thu Aug 9 13:58:20 UTC 2012

On 08/09/2012 01:39 PM, Kumar Srinivasan wrote:

2. This patch uses RPATH (and not RUNPATH). This makes it impossible to > use LDLIBRARYPATH to override the linker path. I don't see any > potential dangerous effects (pretty much all libraries in the have an > RPATH), and I suspect it's even intentional (so JDK6 can exec JDK7 with > an LDLIBRARYPATH set and things will continue working). Does OpenJDK > support platforms with RUNPATH (-Wl,--enable-new-dtags) ? Yes if jdk6 is used to exec jdk7+, the launcher will set the LDLIBRARYPATH to protects itself from jdk6's LLP, and exec itself. Please see http://hg.openjdk.java.net/jdk7u/jdk7u-dev/jdk/rev/d8dfd1a0bd8d I don't know what --enable-new-dtags is and what it does.

RPATH has been deprecated for more than ten years. See man ld,so(8):

   o  (ELF only) Using  the  directories  specified  in  the
      DT_RPATH  dynamic  section  attribute of the binary if
      present and DT_RUNPATH attribute does not exist.   Use
      of DT_RPATH is deprecated.

DT_RUNPATH is the modern equivalent, and it's what you get if you use --enable-new-dtags .

Andrew.

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