Code review comments

@@ -482,23 +482,23 @@
 # Sometimes we want all symbols and types in debugging information even
 # if they aren't used.
 CALLSYMS=       -W0,-xdbggen=no%usedonly
 
 #
-# Default debug format for Sun Studio 11 is dwarf, so force it to
-# generate stabs.
+# We force the compilers to generate the debugging information best understood
+# by the CTF tools.  With Sun Studio this is stabs due to bugs in the Studio
+# compilers.  With GCC this is DWARF v2.
 #
 DEBUGFORMAT=    -_cc=-xdebugformat=stabs -_gcc=-gdwarf-2
 
 #
 # Ask the compiler to include debugging information
 #
 CCGDEBUG= -g $(DEBUGFORMAT)
 
 #
-# Flags used to build in debug mode for ctf generation.  Bugs in the Devpro
-# compilers currently prevent us from building with cc-emitted DWARF.
+# Flags used to build in debug mode for ctf generation.  
 #
 CTF_FLAGS_sparc = $(CCGDEBUG) -Wc,-Qiselect-T1 $(CSTD) $(CNOGLOBAL)
 CTF_FLAGS_i386  = $(CCGDEBUG) $(CSTD) $(CNOGLOBAL)
 
 CTF_FLAGS_sparcv9       = $(CTF_FLAGS_sparc)

@@ -512,17 +512,19 @@
 CTF_FLAGS       = $(CTF_FLAGS_32)
 
 #
 # Flags used with genoffsets
 #
-GENOFFFLAGS = $(CALLSYMS)
+GENOFFSETS_FLAGS = $(CALLSYMS)
 
 OFFSETS_CREATE = $(GENOFFSETS) -s $(CTFSTABS) -r $(CTFCONVERT) \
-        $(CW) --noecho $(CW_CC_COMPILERS) -- $(GENOFFFLAGS) $(CFLAGS) $(CPPFLAGS)
+        $(CW) --noecho $(CW_CC_COMPILERS) -- $(GENOFFSETS_FLAGS) \
+        $(CFLAGS) $(CPPFLAGS)
 
 OFFSETS_CREATE64 = $(GENOFFSETS) -s $(CTFSTABS) -r $(CTFCONVERT) \
-        $(CW) --noecho $(CW_CC_COMPILERS) -- $(GENOFFFLAGS) $(CFLAGS64) $(CPPFLAGS)
+        $(CW) --noecho $(CW_CC_COMPILERS) -- $(GENOFFSETS_FLAGS) \
+        $(CFLAGS64) $(CPPFLAGS)
 
 #
 # tradeoff time for space (smaller is better)
 #
 sparc_SPACEFLAG         = -xspace -W0,-Lt