diff --git a/Makefile.config.in b/Makefile.config.in
index dd948bf1f36..6422559574b 100644
--- a/Makefile.config.in
+++ b/Makefile.config.in
@@ -86,6 +86,13 @@ PROJ_VERSION := 1.0
 endif
 endif
 
+INTERNAL_PREFIX := @INTERNAL_PREFIX@
+ifneq ($(INTERNAL_PREFIX),)
+PROJ_internal_prefix := $(INTERNAL_PREFIX)
+else
+PROJ_internal_prefix := $(prefix)
+endif
+
 PROJ_bindir     := $(PROJ_prefix)/bin
 PROJ_libdir     := $(PROJ_prefix)/lib
 PROJ_datadir    := $(PROJ_prefix)/share
diff --git a/Makefile.rules b/Makefile.rules
index 3816bbb1a1c..1c5effe65be 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -1503,12 +1503,19 @@ install-local::
 uninstall-local::
 	$(Echo) Uninstall circumvented with NO_INSTALL
 else
-DestTool = $(DESTDIR)$(PROJ_bindir)/$(TOOLEXENAME)
+
+ifdef INTERNAL_TOOL
+ToolBinDir = $(DESTDIR)$(PROJ_internal_prefix)/bin
+else
+ToolBinDir = $(DESTDIR)$(PROJ_bindir)
+endif
+DestTool = $(ToolBinDir)/$(TOOLEXENAME)
 
 install-local:: $(DestTool)
 
-$(DestTool): $(ToolBuildPath) $(DESTDIR)$(PROJ_bindir)
+$(DestTool): $(ToolBuildPath)
 	$(Echo) Installing $(BuildMode) $(DestTool)
+	$(Verb) $(MKDIR) $(ToolBinDir)
 	$(Verb) $(ProgInstall) $(ToolBuildPath) $(DestTool)
 
 uninstall-local::
@@ -1517,7 +1524,7 @@ uninstall-local::
 
 # TOOLALIAS install.
 ifdef TOOLALIAS
-DestToolAlias = $(DESTDIR)$(PROJ_bindir)/$(TOOLALIAS)$(EXEEXT)
+DestToolAlias = $(ToolBinDir)/$(TOOLALIAS)$(EXEEXT)
 
 install-local:: $(DestToolAlias)
 
@@ -2276,6 +2283,7 @@ printvars::
 	$(Echo) "LLVM_SRC_ROOT: " '$(LLVM_SRC_ROOT)'
 	$(Echo) "LLVM_OBJ_ROOT: " '$(LLVM_OBJ_ROOT)'
 	$(Echo) "PROJ_prefix  : " '$(PROJ_prefix)'
+	$(Echo) "PROJ_internal_prefix  : " '$(PROJ_internal_prefix)'
 	$(Echo) "PROJ_bindir  : " '$(PROJ_bindir)'
 	$(Echo) "PROJ_libdir  : " '$(PROJ_libdir)'
 	$(Echo) "PROJ_etcdir  : " '$(PROJ_etcdir)'
diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index 5503e3a307d..060ebac8d35 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -885,6 +885,12 @@ AC_ARG_ENABLE(libffi,AS_HELP_STRING(
   esac],
   llvm_cv_enable_libffi=no)
 
+AC_ARG_WITH(internal-prefix,
+  AS_HELP_STRING([--with-internal-prefix],
+    [Installation directory for internal files]),,
+    withval="")
+AC_SUBST(INTERNAL_PREFIX,[$withval])
+
 dnl===-----------------------------------------------------------------------===
 dnl===
 dnl=== SECTION 4: Check for programs we need and that they are the right version
diff --git a/configure b/configure
index c2c3f4c83fd..bf63d49e7d0 100755
--- a/configure
+++ b/configure
@@ -711,6 +711,7 @@ EXTRA_OPTIONS
 EXTRA_LD_OPTIONS
 CLANG_SRC_ROOT
 BINUTILS_INCDIR
+INTERNAL_PREFIX
 NM
 ifGNUmake
 LN_S
@@ -1451,6 +1452,7 @@ Optional Packages:
                           plugin-api.h file for gold plugin.
   --with-bug-report-url   Specify the URL where bug reports should be
                           submitted (default=http://llvm.org/bugs/)
+  --with-internal-prefix  Installation directory for internal files
   --with-tclinclude       directory where tcl headers are
   --with-udis86=<path>    Use udis86 external x86 disassembler library
   --with-oprofile=<prefix>
@@ -5671,6 +5673,17 @@ fi
 
 
 
+# Check whether --with-internal-prefix was given.
+if test "${with_internal_prefix+set}" = set; then
+  withval=$with_internal_prefix;
+else
+  withval=""
+fi
+
+INTERNAL_PREFIX=$withval
+
+
+
 { echo "$as_me:$LINENO: checking for BSD-compatible nm" >&5
 echo $ECHO_N "checking for BSD-compatible nm... $ECHO_C" >&6; }
 if test "${lt_cv_path_NM+set}" = set; then
@@ -10476,7 +10489,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 10479 "configure"
+#line 10492 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -21937,6 +21950,7 @@ EXTRA_OPTIONS!$EXTRA_OPTIONS$ac_delim
 EXTRA_LD_OPTIONS!$EXTRA_LD_OPTIONS$ac_delim
 CLANG_SRC_ROOT!$CLANG_SRC_ROOT$ac_delim
 BINUTILS_INCDIR!$BINUTILS_INCDIR$ac_delim
+INTERNAL_PREFIX!$INTERNAL_PREFIX$ac_delim
 NM!$NM$ac_delim
 ifGNUmake!$ifGNUmake$ac_delim
 LN_S!$LN_S$ac_delim
@@ -22017,7 +22031,7 @@ LIBOBJS!$LIBOBJS$ac_delim
 LTLIBOBJS!$LTLIBOBJS$ac_delim
 _ACEOF
 
-  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 90; then
+  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 91; then
     break
   elif $ac_last_try; then
     { { echo "$as_me:$LINENO: error: could not make $CONFIG_STATUS" >&5