diff --git a/Makefile.config.in b/Makefile.config.in
index b4ecea631e3c..e3bd2a207a50 100644
--- a/Makefile.config.in
+++ b/Makefile.config.in
@@ -61,7 +61,6 @@ endif
 
 prefix          := @prefix@
 PROJ_prefix     := $(prefix)
-program_prefix  := @program_prefix@
 PROJ_VERSION    := $(LLVMVersion)
 else
 ifndef PROJ_SRC_ROOT
diff --git a/Makefile.rules b/Makefile.rules
index 11837558fe74..289adc2be429 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -548,22 +548,22 @@ else
   LLVM_CONFIG := $(LLVMToolDir)/llvm-config$(EXEEXT)
 endif
 ifndef LLVMDIS
-LLVMDIS  := $(LLVMToolDir)/$(program_prefix)llvm-dis$(EXEEXT)
+LLVMDIS  := $(LLVMToolDir)/llvm-dis$(EXEEXT)
 endif
 ifndef LLI
-LLI      := $(LLVMToolDir)/$(program_prefix)lli$(EXEEXT)
+LLI      := $(LLVMToolDir)/lli$(EXEEXT)
 endif
 ifndef LLC
-LLC      := $(LLVMToolDir)/$(program_prefix)llc$(EXEEXT)
+LLC      := $(LLVMToolDir)/llc$(EXEEXT)
 endif
 ifndef LOPT
-LOPT     := $(LLVMToolDir)/$(program_prefix)opt$(EXEEXT)
+LOPT     := $(LLVMToolDir)/opt$(EXEEXT)
 endif
 ifndef LBUGPOINT
-LBUGPOINT := $(LLVMToolDir)/$(program_prefix)bugpoint$(EXEEXT)
+LBUGPOINT := $(LLVMToolDir)/bugpoint$(EXEEXT)
 endif
 ifndef LLVMLINK
-LLVMLINK      := $(LLVMToolDir)/$(program_prefix)llvm-link$(EXEEXT)
+LLVMLINK      := $(LLVMToolDir)/llvm-link$(EXEEXT)
 endif
 
 #--------------------------------------------------------------------
@@ -1541,7 +1541,7 @@ ToolBinDir = $(DESTDIR)$(PROJ_internal_prefix)/bin
 else
 ToolBinDir = $(DESTDIR)$(PROJ_bindir)
 endif
-DestTool = $(ToolBinDir)/$(program_prefix)$(TOOLEXENAME)
+DestTool = $(ToolBinDir)/$(TOOLEXENAME)
 
 install-local:: $(DestTool)
 
@@ -1556,7 +1556,7 @@ uninstall-local::
 
 # TOOLALIAS install.
 ifdef TOOLALIAS
-DestToolAlias = $(ToolBinDir)/$(program_prefix)$(TOOLALIAS)$(EXEEXT)
+DestToolAlias = $(ToolBinDir)/$(TOOLALIAS)$(EXEEXT)
 
 install-local:: $(DestToolAlias)
 
diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index 59757078740a..7fa883e9cc50 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -40,9 +40,6 @@ dnl in the output of --version option of the generated configure script.
 AC_SUBST(LLVM_COPYRIGHT,["Copyright (c) 2003-2012 University of Illinois at Urbana-Champaign."])
 AC_COPYRIGHT([Copyright (c) 2003-2012 University of Illinois at Urbana-Champaign.])
 
-dnl Add --program-prefix value to Makefile.rules. Already an ARG variable.
-AC_SUBST([program_prefix])
-
 dnl Indicate that we require autoconf 2.60 or later.
 AC_PREREQ(2.60)
 
diff --git a/configure b/configure
index 863460b93e52..6fbc47c72a7e 100755
--- a/configure
+++ b/configure
@@ -640,7 +640,6 @@ build_alias
 host_alias
 target_alias
 LLVM_COPYRIGHT
-program_prefix
 CC
 CFLAGS
 LDFLAGS
@@ -1929,8 +1928,6 @@ LLVM_COPYRIGHT="Copyright (c) 2003-2012 University of Illinois at Urbana-Champai
 
 
 
-
-
 ac_aux_dir=
 for ac_dir in autoconf "$srcdir"/autoconf; do
   if test -f "$ac_dir/install-sh"; then
@@ -10292,7 +10289,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 10295 "configure"
+#line 10292 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -22117,7 +22114,6 @@ build_alias!$build_alias$ac_delim
 host_alias!$host_alias$ac_delim
 target_alias!$target_alias$ac_delim
 LLVM_COPYRIGHT!$LLVM_COPYRIGHT$ac_delim
-program_prefix!$program_prefix$ac_delim
 CC!$CC$ac_delim
 CFLAGS!$CFLAGS$ac_delim
 LDFLAGS!$LDFLAGS$ac_delim
@@ -22176,6 +22172,7 @@ JIT!$JIT$ac_delim
 TARGET_HAS_JIT!$TARGET_HAS_JIT$ac_delim
 ENABLE_DOCS!$ENABLE_DOCS$ac_delim
 ENABLE_DOXYGEN!$ENABLE_DOXYGEN$ac_delim
+LLVM_ENABLE_THREADS!$LLVM_ENABLE_THREADS$ac_delim
 _ACEOF
 
   if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 97; then
@@ -22217,7 +22214,6 @@ _ACEOF
 ac_delim='%!_!# '
 for ac_last_try in false false false false false :; do
   cat >conf$$subs.sed <<_ACEOF
-LLVM_ENABLE_THREADS!$LLVM_ENABLE_THREADS$ac_delim
 ENABLE_PTHREADS!$ENABLE_PTHREADS$ac_delim
 ENABLE_PIC!$ENABLE_PIC$ac_delim
 ENABLE_SHARED!$ENABLE_SHARED$ac_delim
@@ -22315,7 +22311,7 @@ LIBOBJS!$LIBOBJS$ac_delim
 LTLIBOBJS!$LTLIBOBJS$ac_delim
 _ACEOF
 
-  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 96; then
+  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 95; then
     break
   elif $ac_last_try; then
     { { echo "$as_me:$LINENO: error: could not make $CONFIG_STATUS" >&5
@@ -22334,7 +22330,7 @@ fi
 
 cat >>$CONFIG_STATUS <<_ACEOF
 cat >"\$tmp/subs-2.sed" <<\CEOF$ac_eof
-/@[a-zA-Z_][a-zA-Z_0-9]*@/!b
+/@[a-zA-Z_][a-zA-Z_0-9]*@/!b end
 _ACEOF
 sed '
 s/[,\\&]/\\&/g; s/@/@|#_!!_#|/g
@@ -22347,6 +22343,8 @@ N; s/^.*\n//; s/[,\\&]/\\&/g; s/@/@|#_!!_#|/g; b n
 ' >>$CONFIG_STATUS <conf$$subs.sed
 rm -f conf$$subs.sed
 cat >>$CONFIG_STATUS <<_ACEOF
+:end
+s/|#_!!_#|//g
 CEOF$ac_eof
 _ACEOF
 
@@ -22594,7 +22592,7 @@ s&@abs_builddir@&$ac_abs_builddir&;t t
 s&@abs_top_builddir@&$ac_abs_top_builddir&;t t
 s&@INSTALL@&$ac_INSTALL&;t t
 $ac_datarootdir_hack
-" $ac_file_inputs | sed -f "$tmp/subs-1.sed" | sed -f "$tmp/subs-2.sed" | sed 's/|#_!!_#|//g' >$tmp/out
+" $ac_file_inputs | sed -f "$tmp/subs-1.sed" | sed -f "$tmp/subs-2.sed" >$tmp/out
 
 test -z "$ac_datarootdir_hack$ac_datarootdir_seen" &&
   { ac_out=`sed -n '/\${datarootdir}/p' "$tmp/out"`; test -n "$ac_out"; } &&