Clean up build/make files

A number of "glitches" have been found in the Hotspot build files:

- see 6767659 for missed i486 -> x86_32 conversion

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In make/solaris/makefiles/i486.make we have:

# force C++ interpreter to be full optimization
OPT_CFLAGS/interpret.o = -fast -O4

but there is no interpret.cpp. This should have been bytecodeInterpreter.o but to preserve existing behaviour it should just be deleted. (Vladimir fixed this before I could file this CR)

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build/solaris/makefiles/amd64.make contains this snippet:

# Temporary until SS10 C++ compiler is fixed
OPT_CFLAGS/generateOptoStub.o = -xO2
OPT_CFLAGS/thread.o = -xO2

The applicability of this under SS12 should be investigated, and if necessary this should be conditional on SS10 being used.

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In solaris/makefiles/sparcWorks.make in the section for REV >= 5.5

ifeq ("${Platform_arch_model}", "x86_32")
  OPT_CFLAGS=-xtarget=pentium $(EXTRA_OPT_CFLAGS)
  # UBE (CC 5.5) has bug 4923569 with -xO4
  OPT_CFLAGS+=-xO3
endif # 32bit x86

The use of -xtarget=pentium is archaic and obsolete. Using -xtarget=pentium is the same as setting:

-xarch=386 -xchip=pentium -xcache=generic

and yet there is no -xarch 386 option listed in the manual, and the actual -x386 option is deprecated, replaced with -xarch=generic.

We should investigate what target value is appropriate for 2008.

We should also investigate whether -xO3 is desirable rather than -xO4 under SS12.

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In solaris/makefiles/sparcWorks.make we set the various -m and -xtarget flags based on the architecture for use with SS12. The SS12 readme states to use "-xarch=sse2 -m64" in place of -xarch=amd64 but we don't set the sse2 part.

This should also be investigated.

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Do we really need to support compiler versions < 5.5 ? It would be nice to be able to clean out all the historical baggage.

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in dtrace.make we have this:

ISA = $(subst i386,i486,$(shell isainfo -n))
...
XARCH = $(subst sparcv9,v9,$(shell echo $(ISA)))
...
    $(CC) $(SYMFLAG) $(ARCHFLAG/$(XARCH)) -D$(TYPE) -I. -I$(GENERATED) \

which means on sparcv9 we will be looking for ARCHFLAG/v9 but it doesn't exist as sparcWorks.make contains:

ifeq ($(shell expr $(COMPILER_REV) \>= 5.9), 1)
  ARCHFLAG/sparc = $(ARCHFLAG_NEW/sparc)
  ARCHFLAG/sparcv9 = $(ARCHFLAG_NEW/sparcv9)
  ARCHFLAG/i486 = $(ARCHFLAG_NEW/i486)
  ARCHFLAG/amd64 = $(ARCHFLAG_NEW/amd64)
else
  ARCHFLAG/sparc = $(ARCHFLAG_OLD/sparc)
  ARCHFLAG/sparcv9 = $(ARCHFLAG_OLD/sparcv9)
  ARCHFLAG/i486 = $(ARCHFLAG_OLD/i486)
  ARCHFLAG/amd64 = $(ARCHFLAG_OLD/amd64)
endif

so unless I missed something it appears to me that we don't need XARCH and should instead be using $(ARCHFLAG/$(ISA))
In make/solaris/makefiles/fastdebug.make this specialization:

# Workaround for a bug in dtrace. If ciEnv::post_compiled_method_load_event()
# is inlined, the resulting dtrace object file needs a reference to this
# function, whose symbol name is too long for dtrace. So disable inlining
# for this method for now. (fix this when dtrace bug 6258412 is fixed)
OPT_CFLAGS/ciEnv.o = $(OPT_CFLAGS) -xinline=no%__1cFciEnvbFpost_compiled_method_load_event6MpnHnmethod__v_

should be written as:

OPT_CFLAGS/ciEnv.o += -xinline=no%__1cFciEnvbFpost_compiled_method_load_event6MpnHnmethod__v_

in case OPT_CFLAGS/ciEnv.o is specialized elsewhere.
In make/linux/makefiles/top.make we have:

AD_Spec = $(GAMMADIR)/src/cpu/$(Platform_arch)/vm/$(Platform_arch).ad

but that should be

AD_Spec = $(GAMMADIR)/src/cpu/$(Platform_arch)/vm/$(Platform_arch_model).ad