[build] Enable --disable-shared, link to static libparrot

When the system did support dynamic linking we had no chance to
link against a static libparrot, as PARROT_LIBS checked for
has_dynamic_linking and not parrot_is_shared.
Note that we have no --disable-static yet, so we cannot forbid
creating a LIBPARROT_STATIC, this only relies on has_static_linking.

ChangeLog

@@ -1,4 +1,4 @@
-2014-10-21    release 6.9.0
+2014-10-21    release 6.9.0 - supported
     - Core
         + Changed behavior with illegal escape sequences, GH #1103. Do not silently
           skip the \ anymore, throw an EXCEPTION_INVALID_CHARACTER error with
@@ -30,6 +30,8 @@
         + Deprecated --parrot_is_shared in favor of --enable-shared. [GH #1101]
         + Change default of the config key debugging from 1 to 0, i.e. you need to provide
           now --debugging[=flags] for debugging. [GH #1099]
+        + Enable --disable-shared (or --parrot_is_shared=0) to link against static
+          libparrot [GH #1101]
     - Documentation
 	+ Add missing manpages for pbc_disassemble, pbc_dump, pbc_merge
         + Improved src/string/encoding/tables.c pod.

config/gen/makefiles/root.in

@@ -668,7 +668,7 @@ corevm : \
         $(PARROTOLD) \
 	$(RUN_INC_DIR)/parrotlib.pbc \
 	$(RUN_INC_DIR)/config.fpmc \
-#IF(has_dynamic_linking):    $(DYNPMC_TARGETS) \
+#IF(has_dynamic_linking):	$(DYNPMC_TARGETS) \
 	$(LIBRARY_DIR)/Test/More.pbc
 
 gen_library : $(GEN_LIBRARY)
@@ -1148,14 +1148,9 @@ lib_deps_source : $(GEN_HEADERS)
 
 lib_deps : lib_deps_object lib_deps_source
 
-# XXX changes don't always propagate into libparrot
-# e.g. when I change debug:fataly to xfataly, nm still shows the old symbol
-# and parrot builds fine (except for the unproto warning
-# so always delete the lib -leo
-
 PARROT_LIBS : \
 #IF(has_static_linking):  $(LIBPARROT_STATIC) \
-#IF(has_dynamic_linking): $(LIBPARROT_SHARED)
+#IF(parrot_is_shared):  $(LIBPARROT_SHARED)
 
 #IF(cygwin):IMPORTLIB = libparrot.dll.a
 #IF(win32 and cc==gcc):IMPORTLIB = libparrot.lib