hi guys. The build instructions from Volker seem to work ok on my AIX machine up to a point. Using V11 of the XLC compiler I hit a compiler bug. When I move to the latest V12 version I get this below in the build log.. Seems to be a pretty hard failure - any advice? Cheers Steve Compiling /home/spoole/repos/aix-ppc/jdk7u/hotspot/src/share/vm/ci/ciObject.cpp rm -f ciObject.o xlC_r -DAIX -DPPC64 -DASSERT -DDEBUG -I/home/spoole/repos/aix-ppc/jdk7u/hotspot/src/share/vm/prims -I/home/spoole/repos/aix-ppc/jdk7u/hotspot/src/share/vm -I/home/spoole/repos/aix-ppc/jdk7u/hotspot/src/share/vm/precompiled -I/home/spoole/repos/aix-ppc/jdk7u/hotspot/src/cpu/ppc/vm -I/home/spoole/repos/aix-ppc/jdk7u/hotspot/src/os_cpu/aix_ppc/vm -I/home/spoole/repos/aix-ppc/jdk7u/hotspot/src/os/aix/vm -I/home/spoole/repos/aix-ppc/jdk7u/hotspot/src/os/posix/vm -I../generated -DHOTSPOT_RELEASE_VERSION="\"23.2-b04\"" -DHOTSPOT_BUILD_TARGET="\"jvmg\"" -DHOTSPOT_BUILD_USER="\"spoole\"" -DHOTSPOT_LIB_ARCH=\"ppc64\" -DHOTSPOT_VM_DISTRO="\"OpenJDK\"" -DTARGET_OS_FAMILY_aix -DTARGET_ARCH_ppc -DTARGET_ARCH_MODEL_ppc_64 -DTARGET_OS_ARCH_aix_ppc -DTARGET_OS_ARCH_MODEL_aix_ppc_64 -DTARGET_COMPILER_xlc -qpic=large -qnortti -qnoeh -D_REENTRANT -q64 -DCC_INTERP -g -q64 -qlanglvl=c99vla -qlanglvl=noredefmac -qsuppress=1540-0198 -qsuppress=1540-1090 -qsuppress=1500-010 -DSAFEFETCH_STUBS -DINCLUDE_TRACE -c -qmakedep=gcc -MF ../generated/dependencies/ciObject.o.d -o ciObject.o /home/spoole/repos/aix-ppc/jdk7u/hotspot/src/share/vm/ci/ciObject.cpp "/home/spoole/repos/aix-ppc/jdk7u/hotspot/src/share/vm/memory/allocation.hpp", line 112.7: 1540-0300 (S) The "private" member "class StackObj" cannot be accessed. "/home/spoole/repos/aix-ppc/jdk7u/hotspot/src/share/vm/prims/methodHandleWalk.hpp", line 272.7: 1540-0719 (I) The previous message was produced while processing the implicit member function "MethodHandleCompiler::~MethodHandleCompiler()". "/home/spoole/repos/aix-ppc/jdk7u/hotspot/src/share/vm/ci/ciMethodHandle.cpp", line 69.3: 1540-0700 (I) The previous message was produced while processing "ciMethodHandle::get_adapter_impl(bool)".