E-mail from Doug Simon:

Hi Dan,

When building HotSpot in the Graal project, we disable compression of the debug symbols (see line 643 at http://hg.openjdk.java.net/graal/graal/file/c0085eefbd42/mx/mx_graal.py).

To make this work, we’ve needed to patch the makefiles (e.g., [1] and [2]). The need for these patches implies we are the only ones who do this. Anyway, Tom pointed out, instead of:

$(QUIETLY) test -f $(LIBJVM_DIZ) && \
  cp -f $(LIBJVM_DIZ) $(DEST_JVM_DIZ)

it should probably be:

$(QUIETLY) test ! -f $(LIBJVM_DIZ) || \
  cp -f $(LIBJVM_DIZ) $(DEST_JVM_DIZ)

-Doug

[1] http://hg.openjdk.java.net/graal/graal/rev/ec0f6ecc0b7a
[2] http://hg.openjdk.java.net/graal/graal/rev/c0085eefbd42