Index: llvmCore/utils/buildit/GNUmakefile
===================================================================
--- llvmCore/utils/buildit/GNUmakefile	(revision 84050)
+++ llvmCore/utils/buildit/GNUmakefile	(working copy)
@@ -59,7 +59,7 @@
 # NOTE : Always put version numbers at the end because they are optional.
 install: $(OBJROOT) $(SYMROOT) $(DSTROOT)
 	cd $(OBJROOT) && \
-	  $(SRC)/build_llvm "$(RC_ARCHS)" "$(TARGETS)" \
+	  $(SRC)/utils/buildit/build_llvm "$(RC_ARCHS)" "$(TARGETS)" \
 	    $(SRC) $(PREFIX) $(DSTROOT) $(SYMROOT) \
 	    $(LLVM_ASSERTIONS) $(LLVM_OPTIMIZED) \
 	    $(RC_ProjectSourceVersion) $(RC_ProjectSourceSubversion) 
Index: llvmCore/utils/buildit/build_llvm
===================================================================
--- llvmCore/utils/buildit/build_llvm	(revision 84050)
+++ llvmCore/utils/buildit/build_llvm	(working copy)
@@ -82,6 +82,10 @@
 rm -rf $SRC_DIR || exit 1
 mkdir $SRC_DIR || exit 1
 ln -s $ORIG_SRC_DIR/* $SRC_DIR/ || exit 1
+# We can't use the top-level Makefile as-is.  Remove the soft link:
+rm $SRC_DIR/Makefile || exit 1
+# Now create our own by editing the top-level Makefile, deleting every line marked "Apple-style":
+sed -e '/[Aa]pple-style/d' -e '/include.*GNUmakefile/d' $ORIG_SRC_DIR/Makefile > $SRC_DIR/Makefile || exit 1
 
 # Build the LLVM tree universal.
 mkdir -p $DIR/obj-llvm || exit 1
Index: llvmCore/Makefile
===================================================================
--- llvmCore/Makefile	(revision 84050)
+++ llvmCore/Makefile	(working copy)
@@ -19,6 +19,7 @@
 #
 # When cross-compiling, there are some things (tablegen) that need to
 # be build for the build system first.
+ifndef RC_ARCHS  # Normal build (not "Apple-style").
 ifeq ($(BUILD_DIRS_ONLY),1)
   DIRS := lib/System lib/Support utils
   OPTIONAL_DIRS :=
@@ -211,3 +212,8 @@
 
 .NOTPARALLEL:
 
+else # Building "Apple-style."
+# N.B. In an Apple-style build, once configuration is done, lines
+# marked "Apple-style" are removed with sed!  See utils/buildit/build_llvm.
+include utils/buildit/GNUmakefile # Building "Apple-style."
+endif # Building "Apple-style."