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