diff --git a/utils/buildit/GNUmakefile b/utils/buildit/GNUmakefile
index c9a7a5efc97..e0568d2f145 100644
--- a/utils/buildit/GNUmakefile
+++ b/utils/buildit/GNUmakefile
@@ -46,6 +46,9 @@ else
 LLVM_OPTIMIZED := yes
 endif
 
+# Default to not install libLTO.dylib.
+INSTALL_LIBLTO := no
+
 ifndef RC_ProjectSourceVersion
 RC_ProjectSourceVersion = 9999
 endif
@@ -59,7 +62,7 @@ install: $(OBJROOT) $(SYMROOT) $(DSTROOT)
 	cd $(OBJROOT) && \
 	  $(SRC)/utils/buildit/build_llvm "$(RC_ARCHS)" "$(TARGETS)" \
 	    $(SRC) $(PREFIX) $(DSTROOT) $(SYMROOT) \
-	    $(ENABLE_ASSERTIONS) $(LLVM_OPTIMIZED) \
+	    $(ENABLE_ASSERTIONS) $(LLVM_OPTIMIZED) $(INSTALL_LIBLTO) \
 	    $(RC_ProjectSourceVersion) $(RC_ProjectSourceSubversion) 
 
 # installhdrs does nothing, because the headers aren't useful until
diff --git a/utils/buildit/build_llvm b/utils/buildit/build_llvm
index 9600f448f47..b58e0f02db4 100755
--- a/utils/buildit/build_llvm
+++ b/utils/buildit/build_llvm
@@ -42,11 +42,15 @@ LLVM_ASSERTIONS="$7"
 # build.
 LLVM_OPTIMIZED="$8"
 
-# The nineth parameter is the version number of the submission, e.g. 1007.
-LLVM_SUBMIT_VERSION="$9"
+# The ninth parameter is a yes/no that indicates whether libLTO.dylib
+# should be installed.
+INSTALL_LIBLTO="$9"
 
-# The tenth parameter is the subversion number of the submission, e.g. 03.
-LLVM_SUBMIT_SUBVERSION="${10}"
+# The tenth parameter is the version number of the submission, e.g. 1007.
+LLVM_SUBMIT_VERSION="${10}"
+
+# The eleventh parameter is the subversion number of the submission, e.g. 03.
+LLVM_SUBMIT_SUBVERSION="${11}"
 
 # The current working directory is where the build will happen. It may already
 # contain a partial result of an interrupted build, in which case this script
@@ -276,9 +280,13 @@ else
 fi
 
 cd $DEST_DIR$DEST_ROOT
-mkdir -p $DT_HOME/lib
-mv lib/libLTO.dylib $DT_HOME/lib/libLTO.dylib
-strip -S $DT_HOME/lib/libLTO.dylib
+if [ "$INSTALL_LIBLTO" == yes ]; then
+  mkdir -p $DT_HOME/lib
+  mv lib/libLTO.dylib $DT_HOME/lib/libLTO.dylib
+  strip -S $DT_HOME/lib/libLTO.dylib
+else
+  rm lib/libLTO.dylib
+fi
 rm -f lib/libLTO.a lib/libLTO.la
 
 # The Hello dylib is an example of how to build a pass. No need to install it.
@@ -343,10 +351,11 @@ find $DEST_DIR -name html.tar.gz -exec rm {} \;
 ################################################################################
 # symlinks so that B&I can find things
 
-cd $DEST_DIR
-mkdir -p ./usr/lib/
-cd usr/lib
-ln -s ../../$DEVELOPER_DIR/usr/lib/libLTO.dylib ./libLTO.dylib
+if [ "$INSTALL_LIBLTO" == yes ]; then
+  mkdir -p $DEST_DIR/usr/lib/
+  cd $DEST_DIR/usr/lib && \
+    ln -s ../../$DEVELOPER_DIR/usr/lib/libLTO.dylib ./libLTO.dylib
+fi
 
 ################################################################################
 # w00t! Done!