fyi: coro patch still won't build coroutine.o on Mac OS X

[Stephen Bannasch]

FYI: still can't compile coroutine.o on Mac OS X warning that "NULL used in arithmetic".

Building with guards="buildable testable coro" still produces these compilation warnings (with the -Werror compiler flag being 
used warnings are treated as errors):

   hotspot/src/share/vm/runtime/coroutine.cpp:
     In member function 'void CoroutineData::frames_do(Coroutine*, FrameClosure*)':
   hotspot/src/share/vm/runtime/coroutine.cpp:469:
     warning: NULL used in arithmetic
   hotspot/src/share/vm/runtime/coroutine.cpp:
     In member function 'frame CoroutineData::last_frame(Coroutine*, RegisterMap&) const':
   hotspot/src/share/vm/runtime/coroutine.cpp:492:
     warning: NULL used in arithmetic

Here's the more detailed console output:

Compiling /Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/runtime/coroutine.cpp
rm -f coroutine.o
/Users/stephen/dev/java/src/mlvm/sources/ALT_COMPILER_PATH//g++ -D_ALLBSD_SOURCE -D_GNU_SOURCE -DAMD64 -DASSERT -DFASTDEBUG -I. 
-I../generated/adfiles -I../generated/jvmtifiles -I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/asm 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/c1 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/ci 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/classfile 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/code 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/compiler 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/gc_implementation 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/gc_implementation/concurrentMarkSweep 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/gc_implementation/g1 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/gc_implementation/parallelScavenge 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/gc_implementation/parNew 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/gc_implementation/shared 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/gc_interface 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/interpreter 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/libadt 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/memory 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/oops 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/opto 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/prims 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/runtime 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/services 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/shark 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/utilities 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/cpu/x86/vm 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/os/bsd/vm 
-I/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/os_cpu/bsd_x86/vm -I../generated 
-DHOTSPOT_RELEASE_VERSION="\"20.0-b03\"" -DHOTSPOT_BUILD_TARGET="\"fastdebug\"" -DHOTSPOT_BUILD_USER="\"stephen\"" 
-DHOTSPOT_LIB_ARCH=\"amd64\" -DJRE_RELEASE_VERSION="\"1.7.0-internal-fastdebug-stephen_2011_01_11_23_12-b00\"" 
-DHOTSPOT_VM_DISTRO="\"OpenJDK\"" -DCOMPILER2 -DCOMPILER1 -fPIC -fno-rtti -fno-exceptions -pthread -fcheck-new -m64 -pipe -O3 
-fno-strict-aliasing -DVM_LITTLE_ENDIAN -D_LP64=1 -fno-omit-frame-pointer -Werror -Wpointer-arith -Wconversion -Wsign-compare 
-D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -c -o coroutine.o 
/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/runtime/coroutine.cpp
cc1plus: warnings being treated as errors
/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/runtime/coroutine.cpp: In member function 'void 
CoroutineData::frames_do(Coroutine*, FrameClosure*)':
/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/runtime/coroutine.cpp:469: warning: NULL used in arithmetic
/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/runtime/coroutine.cpp: In member function 'frame 
CoroutineData::last_frame(Coroutine*, RegisterMap&) const':
/Users/stephen/dev/java/src/mlvm/sources/hotspot/src/share/vm/runtime/coroutine.cpp:492: warning: NULL used in arithmetic
make[6]: *** [coroutine.o] Error 1
make[6]: *** Waiting for unfinished jobs....
make[5]: *** [the_vm] Error 2
make[4]: *** [fastdebug] Error 2
make[3]: *** [generic_build2] Error 2
make[2]: *** [fastdebug] Error 2
make[1]: *** [hotspot-build] Error 2
make: *** [build_product_image] Error 2
[1]+  Done                    rm -i -rf build.del