move yacc command in platform/* due to Mac PPC ancient bison version.

Mac PPC has a very old bison that does not handle .cxx extension well
not does it support --defines=<file>. the result is that the generated
header is called <foo>.cxx.h instead of <foo>.hxx

To deal with that we moved the yacc rule in the platefrom dependent section
and added some renaming magic for the PowerPC case on MacOS.

solenv/gbuild/LinkTarget.mk

@@ -229,14 +229,8 @@ gb_YaccObject_get_grammar = $(1)/$(2).y
 gb_YACC := bison
 
 # YaccObject class
-define gb_YaccObject__command
-$(call gb_Output_announce,$(2),$(true),YAC,3)
-$(call gb_Helper_abbreviate_dirs,\
-	mkdir -p $(dir $(1)) && \
-	$(gb_YACC) $(T_YACCFLAGS) -d -o $(1) $(3) )
-
-endef
-
+# defined by platform
+# gb_YaccObject__command(grammar-file, stem-for-message, source-target, include-target)
 
 # ObjCxxObject class
 #
@@ -898,7 +892,7 @@ $(call gb_GenCxxObject_get_target,$(2)) : $(call gb_YaccObject_get_target_source
 $(call gb_LinkTarget_get_target,$(1)) : $(call gb_GenCxxObject_get_target,$(2))
 $(call gb_GenCxxObject_get_target,$(2)) : $(call gb_YaccObject_get_target_source,$(2)) $(call gb_YaccObject_get_target_include,$(2))
 $(call gb_YaccObject_get_target_source,$(2)) $(call gb_YaccObject_get_target_include,$(2)) : $(call gb_YaccObject_get_grammar,$(gb_REPOS),$(2))
-	$$(call gb_YaccObject__command,$$@,$(2),$$<)
+	$$(call gb_YaccObject__command,$(call gb_YaccObject_get_grammar,$(gb_REPOS),$(2)),$(2),$(call gb_YaccObject_get_target_source,$(2)),$(call gb_YaccObject_get_target_include,$(2)))
 endef
 
 define gb_LinkTarget_add_noexception_object

solenv/gbuild/platform/macosx.mk

@@ -38,6 +38,7 @@ gb_GCCP := gcc
 gb_AR := ar
 gb_AWK := awk
 gb_CLASSPATHSEP := :
+gb_YACC := bison
 
 # use CC/CXX if they are nondefaults
 ifneq ($(origin CC),default)
@@ -163,7 +164,32 @@ define gb_Helper_convert_native
 $(1)
 endef
 
+# YaccObject class
 
+ifeq ($(CPUNAME),POWERPC)
+#
+# PowerPC mac version of bison is ancient. it does not handle well
+# .cxx extension nor does it support --defines=<file>
+# the result is that the header is named <foo>.cxx.h instead of <foo>.hxx
+# so we queue a mv to rename the header accordingly.
+#
+define gb_YaccObject__command
+$(call gb_Output_announce,$(2),$(true),YAC,3)
+$(call gb_Helper_abbreviate_dirs,\
+	mkdir -p $(dir $(3)) && \
+	$(gb_YACC) $(T_YACCFLAGS) -d -o $(3) $(1) && mv $(3).h $(4) )
+
+endef
+
+else
+define gb_YaccObject__command
+$(call gb_Output_announce,$(2),$(true),YAC,3)
+$(call gb_Helper_abbreviate_dirs,\
+	mkdir -p $(dir $(3)) && \
+	$(gb_YACC) $(T_YACCFLAGS) --defines=$(4) -o $(3) $(1) )
+
+endef
+endif
 # CObject class
 
 define gb_CObject__command

solenv/gbuild/platform/unxgcc.mk

@@ -37,6 +37,7 @@ gb_GCCP := gcc
 gb_AR := ar
 gb_AWK := awk
 gb_CLASSPATHSEP := :
+gb_YACC := bison
 
 # use CC/CXX if they are nondefaults
 ifneq ($(origin CC),default)
@@ -186,6 +187,16 @@ define gb_Helper_convert_native
 $(1)
 endef
 
+# YaccObject class
+
+define gb_YaccObject__command
+$(call gb_Output_announce,$(2),$(true),YAC,3)
+$(call gb_Helper_abbreviate_dirs,\
+	mkdir -p $(dir $(3)) && \
+	$(gb_YACC) $(T_YACCFLAGS) --defines=$(4) -o $(3) $(1) )
+
+endef
+
 # CObject class
 
 # $(call gb_CObject__command,object,relative-source,source,dep-file)

solenv/gbuild/platform/windows.mk

@@ -39,6 +39,7 @@ gb_LINK := link
 gb_AWK := awk
 gb_CLASSPATHSEP := ;
 gb_RC := rc
+gb_YACC := bison
 
 # use CC/CXX if they are nondefaults
 ifneq ($(origin CC),default)
@@ -260,6 +261,16 @@ $(patsubst $(SRCDIR)%,$(gb_Helper_SRCDIR_NATIVE)%, \
 $(1)))))
 endef
 
+# YaccObject class
+
+define gb_YaccObject__command
+$(call gb_Output_announce,$(2),$(true),YAC,3)
+$(call gb_Helper_abbreviate_dirs,\
+	mkdir -p $(dir $(3)) && \
+	$(gb_YACC) $(T_YACCFLAGS) --defines=$(4) -o $(3) $(1) )
+
+endef
+
 # CObject class
 
 define gb_CObject__command