diff --git a/Makefile.in b/Makefile.in
index c9257ab2..c9b848f3 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -205,12 +205,9 @@ AUTOCONF = @AUTOCONF@
 AUTOHEADER = @AUTOHEADER@
 AUTOMAKE = @AUTOMAKE@
 AWK = @AWK@
-CC = @CC@
-CCDEPMODE = @CCDEPMODE@
-CFLAGS = @CFLAGS@
-CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
 CXX = @CXX@
+CXXCPP = @CXXCPP@
 CXXDEPMODE = @CXXDEPMODE@
 CXXFLAGS = @CXXFLAGS@
 CYGPATH_W = @CYGPATH_W@
@@ -234,7 +231,7 @@ LTLIBOBJS = @LTLIBOBJS@
 MAKEINFO = @MAKEINFO@
 MKDIR_P = @MKDIR_P@
 OBJEXT = @OBJEXT@
-OPENMP_CFLAGS = @OPENMP_CFLAGS@
+OPENMP_CXXFLAGS = @OPENMP_CXXFLAGS@
 PACKAGE = @PACKAGE@
 PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@
 PACKAGE_NAME = @PACKAGE_NAME@
@@ -252,7 +249,6 @@ abs_builddir = @abs_builddir@
 abs_srcdir = @abs_srcdir@
 abs_top_builddir = @abs_top_builddir@
 abs_top_srcdir = @abs_top_srcdir@
-ac_ct_CC = @ac_ct_CC@
 ac_ct_CXX = @ac_ct_CXX@
 am__include = @am__include@
 am__leading_dot = @am__leading_dot@
diff --git a/TODO b/TODO
index 6a1624f7..b596c605 100644
--- a/TODO
+++ b/TODO
@@ -2,10 +2,7 @@
 *** Hacks and bug fixes to clean up and Audits
 ================================================================
 * Base class to share common code between vRealF, VComplexF etc... 
-
-* Performance check on Guido's reimplementation strategy
-
-* Bug in SeedFixedIntegers gives same output on each site. -- Think I fixed but NOT checked for sure
+  - Performance check on Guido's reimplementation strategy
 
 * FIXME audit
 * const audit
@@ -20,15 +17,16 @@
 *** New Functionality
 ================================================================
 
-* Implement where to take template scheme.
+* Implement where within expression template scheme.
 
 * - BinaryWriter, TextWriter etc...
   - use protocol buffers? replace xmlReader/Writer ec..
   - Binary use htonll, htonl
 
-* Expression template engine:
+* Bug in SeedFixedIntegers gave same output on each site. -- Think I fixed but NOT checked for sure
+  Implement and use lattice IO to verify this.
 
-   -- Audit
+* Expression template engine: -- DONE
    -- Norm2(expression) problem: introduce norm2 unary op, or Introduce conversion automatic from expression to Lattice<vobj>
 
 * CovariantShift support                             -----Use a class to store gauge field? (parallel transport?)
@@ -56,9 +54,10 @@
 * TaProj
 * FFTnD ?
 
-* Parallel MPI2 IO
-  Plaquette checks into nersc reader.
-
+* Parallel io improvements
+  - optional parallel MPI2 IO
+  - move Plaquette and link trace checks into nersc reader from the Grid_nersc_io.cc test.
+  
 * rb4d support for 5th dimension in Mobius.
 
 * Check for missing functionality                    - partially audited against QDP++ layout
@@ -70,13 +69,15 @@
    // copyMask.
    // localMaxAbs
    // Fourier transform equivalent.
-Actions
+
+Actions -- coherent framework for implementing actions and their forces.
 * Fermion
   - Wilson
   - Clover
   - DomainWall
   - Mobius
   - z-Mobius
+
 * Gauge
   - Wilson, symanzik, iwasaki
 
diff --git a/aclocal.m4 b/aclocal.m4
index f3018f6c..bf79d078 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -765,70 +765,6 @@ AC_DEFUN([_AM_SET_OPTIONS],
 AC_DEFUN([_AM_IF_OPTION],
 [m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])])
 
-# Copyright (C) 1999-2014 Free Software Foundation, Inc.
-#
-# This file is free software; the Free Software Foundation
-# gives unlimited permission to copy and/or distribute it,
-# with or without modifications, as long as this notice is preserved.
-
-# _AM_PROG_CC_C_O
-# ---------------
-# Like AC_PROG_CC_C_O, but changed for automake.  We rewrite AC_PROG_CC
-# to automatically call this.
-AC_DEFUN([_AM_PROG_CC_C_O],
-[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
-AC_REQUIRE_AUX_FILE([compile])dnl
-AC_LANG_PUSH([C])dnl
-AC_CACHE_CHECK(
-  [whether $CC understands -c and -o together],
-  [am_cv_prog_cc_c_o],
-  [AC_LANG_CONFTEST([AC_LANG_PROGRAM([])])
-  # Make sure it works both with $CC and with simple cc.
-  # Following AC_PROG_CC_C_O, we do the test twice because some
-  # compilers refuse to overwrite an existing .o file with -o,
-  # though they will create one.
-  am_cv_prog_cc_c_o=yes
-  for am_i in 1 2; do
-    if AM_RUN_LOG([$CC -c conftest.$ac_ext -o conftest2.$ac_objext]) \
-         && test -f conftest2.$ac_objext; then
-      : OK
-    else
-      am_cv_prog_cc_c_o=no
-      break
-    fi
-  done
-  rm -f core conftest*
-  unset am_i])
-if test "$am_cv_prog_cc_c_o" != yes; then
-   # Losing compiler, so override with the script.
-   # FIXME: It is wrong to rewrite CC.
-   # But if we don't then we get into trouble of one sort or another.
-   # A longer-term fix would be to have automake use am__CC in this case,
-   # and then we could set am__CC="\$(top_srcdir)/compile \$(CC)"
-   CC="$am_aux_dir/compile $CC"
-fi
-AC_LANG_POP([C])])
-
-# For backward compatibility.
-AC_DEFUN_ONCE([AM_PROG_CC_C_O], [AC_REQUIRE([AC_PROG_CC])])
-
-# Copyright (C) 2001-2014 Free Software Foundation, Inc.
-#
-# This file is free software; the Free Software Foundation
-# gives unlimited permission to copy and/or distribute it,
-# with or without modifications, as long as this notice is preserved.
-
-# AM_RUN_LOG(COMMAND)
-# -------------------
-# Run COMMAND, save the exit status in ac_status, and log it.
-# (This has been adapted from Autoconf's _AC_RUN_LOG macro.)
-AC_DEFUN([AM_RUN_LOG],
-[{ echo "$as_me:$LINENO: $1" >&AS_MESSAGE_LOG_FD
-   ($1) >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD
-   ac_status=$?
-   echo "$as_me:$LINENO: \$? = $ac_status" >&AS_MESSAGE_LOG_FD
-   (exit $ac_status); }])
-
 # Check to make sure that the build environment is sane.    -*- Autoconf -*-
 
 # Copyright (C) 1996-2014 Free Software Foundation, Inc.
diff --git a/benchmarks/Grid_wilson.cc b/benchmarks/Grid_wilson.cc
index de31413f..9ce13090 100644
--- a/benchmarks/Grid_wilson.cc
+++ b/benchmarks/Grid_wilson.cc
@@ -77,7 +77,7 @@ int main (int argc, char ** argv)
   WilsonMatrix Dw(Umu,mass);
   
   std::cout << "Calling Dw"<<std::endl;
-  int ncall=10000;
+  int ncall=1000;
   double t0=usecond();
   for(int i=0;i<ncall;i++){
     Dw.multiply(src,result);
diff --git a/configure b/configure
index 3d25f6a9..d5071cd1 100755
--- a/configure
+++ b/configure
@@ -632,15 +632,9 @@ BUILD_COMMS_MPI_FALSE
 BUILD_COMMS_MPI_TRUE
 EGREP
 GREP
-CPP
+CXXCPP
 RANLIB
-OPENMP_CFLAGS
-am__fastdepCC_FALSE
-am__fastdepCC_TRUE
-CCDEPMODE
-ac_ct_CC
-CFLAGS
-CC
+OPENMP_CXXFLAGS
 am__fastdepCXX_FALSE
 am__fastdepCXX_TRUE
 CXXDEPMODE
@@ -741,9 +735,7 @@ LDFLAGS
 LIBS
 CPPFLAGS
 CCC
-CC
-CFLAGS
-CPP'
+CXXCPP'
 
 
 # Initialize some variables set by options.
@@ -1378,9 +1370,7 @@ Some influential environment variables:
   LIBS        libraries to pass to the linker, e.g. -l<library>
   CPPFLAGS    (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if
               you have headers in a nonstandard directory <include dir>
-  CC          C compiler command
-  CFLAGS      C compiler flags
-  CPP         C preprocessor
+  CXXCPP      C++ preprocessor
 
 Use these variables to override the choices made by `configure' or to help
 it to find libraries and programs with nonstandard names/locations.
@@ -1500,48 +1490,10 @@ fi
 
 } # ac_fn_cxx_try_compile
 
-# ac_fn_c_try_compile LINENO
-# --------------------------
-# Try to compile conftest.$ac_ext, and return whether this succeeded.
-ac_fn_c_try_compile ()
-{
-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  rm -f conftest.$ac_objext
-  if { { ac_try="$ac_compile"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_compile") 2>conftest.err
-  ac_status=$?
-  if test -s conftest.err; then
-    grep -v '^ *+' conftest.err >conftest.er1
-    cat conftest.er1 >&5
-    mv -f conftest.er1 conftest.err
-  fi
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; } && {
-	 test -z "$ac_c_werror_flag" ||
-	 test ! -s conftest.err
-       } && test -s conftest.$ac_objext; then :
-  ac_retval=0
-else
-  $as_echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-	ac_retval=1
-fi
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
-  as_fn_set_status $ac_retval
-
-} # ac_fn_c_try_compile
-
-# ac_fn_c_try_link LINENO
-# -----------------------
+# ac_fn_cxx_try_link LINENO
+# -------------------------
 # Try to link conftest.$ac_ext, and return whether this succeeded.
-ac_fn_c_try_link ()
+ac_fn_cxx_try_link ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   rm -f conftest.$ac_objext conftest$ac_exeext
@@ -1561,7 +1513,7 @@ $as_echo "$ac_try_echo"; } >&5
   fi
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } && {
-	 test -z "$ac_c_werror_flag" ||
+	 test -z "$ac_cxx_werror_flag" ||
 	 test ! -s conftest.err
        } && test -s conftest$ac_exeext && {
 	 test "$cross_compiling" = yes ||
@@ -1582,12 +1534,12 @@ fi
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
-} # ac_fn_c_try_link
+} # ac_fn_cxx_try_link
 
-# ac_fn_c_try_cpp LINENO
-# ----------------------
+# ac_fn_cxx_try_cpp LINENO
+# ------------------------
 # Try to preprocess conftest.$ac_ext, and return whether this succeeded.
-ac_fn_c_try_cpp ()
+ac_fn_cxx_try_cpp ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   if { { ac_try="$ac_cpp conftest.$ac_ext"
@@ -1606,7 +1558,7 @@ $as_echo "$ac_try_echo"; } >&5
   fi
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; } > conftest.i && {
-	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
+	 test -z "$ac_cxx_preproc_warn_flag$ac_cxx_werror_flag" ||
 	 test ! -s conftest.err
        }; then :
   ac_retval=0
@@ -1619,14 +1571,14 @@ fi
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
-} # ac_fn_c_try_cpp
+} # ac_fn_cxx_try_cpp
 
-# ac_fn_c_check_header_mongrel LINENO HEADER VAR INCLUDES
-# -------------------------------------------------------
+# ac_fn_cxx_check_header_mongrel LINENO HEADER VAR INCLUDES
+# ---------------------------------------------------------
 # Tests whether HEADER exists, giving a warning if it cannot be compiled using
 # the include files in INCLUDES and setting the cache variable VAR
 # accordingly.
-ac_fn_c_check_header_mongrel ()
+ac_fn_cxx_check_header_mongrel ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   if eval \${$3+:} false; then :
@@ -1647,7 +1599,7 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 $4
 #include <$2>
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_cxx_try_compile "$LINENO"; then :
   ac_header_compiler=yes
 else
   ac_header_compiler=no
@@ -1663,7 +1615,7 @@ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <$2>
 _ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
+if ac_fn_cxx_try_cpp "$LINENO"; then :
   ac_header_preproc=yes
 else
   ac_header_preproc=no
@@ -1673,7 +1625,7 @@ rm -f conftest.err conftest.i conftest.$ac_ext
 $as_echo "$ac_header_preproc" >&6; }
 
 # So?  What about this header?
-case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in #((
+case $ac_header_compiler:$ac_header_preproc:$ac_cxx_preproc_warn_flag in #((
   yes:no: )
     { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: accepted by the compiler, rejected by the preprocessor!" >&5
 $as_echo "$as_me: WARNING: $2: accepted by the compiler, rejected by the preprocessor!" >&2;}
@@ -1710,13 +1662,13 @@ $as_echo "$ac_res" >&6; }
 fi
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
-} # ac_fn_c_check_header_mongrel
+} # ac_fn_cxx_check_header_mongrel
 
-# ac_fn_c_try_run LINENO
-# ----------------------
+# ac_fn_cxx_try_run LINENO
+# ------------------------
 # Try to link conftest.$ac_ext, and return whether this succeeded. Assumes
 # that executables *can* be run.
-ac_fn_c_try_run ()
+ac_fn_cxx_try_run ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   if { { ac_try="$ac_link"
@@ -1752,13 +1704,13 @@ fi
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
-} # ac_fn_c_try_run
+} # ac_fn_cxx_try_run
 
-# ac_fn_c_check_header_compile LINENO HEADER VAR INCLUDES
-# -------------------------------------------------------
+# ac_fn_cxx_check_header_compile LINENO HEADER VAR INCLUDES
+# ---------------------------------------------------------
 # Tests whether HEADER exists and can be compiled using the include files in
 # INCLUDES, setting the cache variable VAR accordingly.
-ac_fn_c_check_header_compile ()
+ac_fn_cxx_check_header_compile ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
@@ -1771,7 +1723,7 @@ else
 $4
 #include <$2>
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_cxx_try_compile "$LINENO"; then :
   eval "$3=yes"
 else
   eval "$3=no"
@@ -1783,13 +1735,13 @@ eval ac_res=\$$3
 $as_echo "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
-} # ac_fn_c_check_header_compile
+} # ac_fn_cxx_check_header_compile
 
-# ac_fn_c_check_decl LINENO SYMBOL VAR INCLUDES
-# ---------------------------------------------
+# ac_fn_cxx_check_decl LINENO SYMBOL VAR INCLUDES
+# -----------------------------------------------
 # Tests whether SYMBOL is declared in INCLUDES, setting cache variable VAR
 # accordingly.
-ac_fn_c_check_decl ()
+ac_fn_cxx_check_decl ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   as_decl_name=`echo $2|sed 's/ *(.*//'`
@@ -1817,7 +1769,7 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_cxx_try_compile "$LINENO"; then :
   eval "$3=yes"
 else
   eval "$3=no"
@@ -1829,13 +1781,13 @@ eval ac_res=\$$3
 $as_echo "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
-} # ac_fn_c_check_decl
+} # ac_fn_cxx_check_decl
 
-# ac_fn_c_check_type LINENO TYPE VAR INCLUDES
-# -------------------------------------------
+# ac_fn_cxx_check_type LINENO TYPE VAR INCLUDES
+# ---------------------------------------------
 # Tests whether TYPE exists after having included INCLUDES, setting cache
 # variable VAR accordingly.
-ac_fn_c_check_type ()
+ac_fn_cxx_check_type ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
@@ -1856,7 +1808,7 @@ if (sizeof ($2))
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_cxx_try_compile "$LINENO"; then :
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
@@ -1869,7 +1821,7 @@ if (sizeof (($2)))
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_cxx_try_compile "$LINENO"; then :
 
 else
   eval "$3=yes"
@@ -1883,7 +1835,7 @@ eval ac_res=\$$3
 $as_echo "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
-} # ac_fn_c_check_type
+} # ac_fn_cxx_check_type
 
 # ac_fn_c_find_uintX_t LINENO BITS VAR
 # ------------------------------------
@@ -1916,7 +1868,7 @@ return test_array [0];
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_cxx_try_compile "$LINENO"; then :
   case $ac_type in #(
   uint$2_t) :
     eval "$3=yes" ;; #(
@@ -1939,10 +1891,10 @@ $as_echo "$ac_res" >&6; }
 
 } # ac_fn_c_find_uintX_t
 
-# ac_fn_c_check_func LINENO FUNC VAR
-# ----------------------------------
+# ac_fn_cxx_check_func LINENO FUNC VAR
+# ------------------------------------
 # Tests whether FUNC exists, setting the cache variable VAR accordingly
-ac_fn_c_check_func ()
+ac_fn_cxx_check_func ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
@@ -1991,7 +1943,7 @@ return $2 ();
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
+if ac_fn_cxx_try_link "$LINENO"; then :
   eval "$3=yes"
 else
   eval "$3=no"
@@ -2004,7 +1956,7 @@ eval ac_res=\$$3
 $as_echo "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
-} # ac_fn_c_check_func
+} # ac_fn_cxx_check_func
 cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
@@ -2971,6 +2923,12 @@ ac_config_headers="$ac_config_headers lib/Grid_config.h"
 
 
 # Checks for programs.
+ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+
 ac_ext=cpp
 ac_cpp='$CXXCPP $CPPFLAGS'
 ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -3472,11 +3430,11 @@ else
     CXXFLAGS=
   fi
 fi
-ac_ext=c
-ac_cpp='$CPP $CPPFLAGS'
-ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
-ac_compiler_gnu=$ac_cv_c_compiler_gnu
+ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
 DEPDIR="${am__leading_dot}deps"
 
 ac_config_commands="$ac_config_commands depfiles"
@@ -3669,744 +3627,18 @@ else
 fi
 
 
-ac_ext=c
-ac_cpp='$CPP $CPPFLAGS'
-ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
-ac_compiler_gnu=$ac_cv_c_compiler_gnu
-if test -n "$ac_tool_prefix"; then
-  # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args.
-set dummy ${ac_tool_prefix}gcc; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_CC+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$CC"; then
-  ac_cv_prog_CC="$CC" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_CC="${ac_tool_prefix}gcc"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-CC=$ac_cv_prog_CC
-if test -n "$CC"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
-$as_echo "$CC" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
 
 
-fi
-if test -z "$ac_cv_prog_CC"; then
-  ac_ct_CC=$CC
-  # Extract the first word of "gcc", so it can be a program name with args.
-set dummy gcc; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_CC+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$ac_ct_CC"; then
-  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_ac_ct_CC="gcc"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-ac_ct_CC=$ac_cv_prog_ac_ct_CC
-if test -n "$ac_ct_CC"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
-$as_echo "$ac_ct_CC" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-  if test "x$ac_ct_CC" = x; then
-    CC=""
-  else
-    case $cross_compiling:$ac_tool_warned in
-yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
-ac_tool_warned=yes ;;
-esac
-    CC=$ac_ct_CC
-  fi
-else
-  CC="$ac_cv_prog_CC"
-fi
-
-if test -z "$CC"; then
-          if test -n "$ac_tool_prefix"; then
-    # Extract the first word of "${ac_tool_prefix}cc", so it can be a program name with args.
-set dummy ${ac_tool_prefix}cc; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_CC+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$CC"; then
-  ac_cv_prog_CC="$CC" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_CC="${ac_tool_prefix}cc"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-CC=$ac_cv_prog_CC
-if test -n "$CC"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
-$as_echo "$CC" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-  fi
-fi
-if test -z "$CC"; then
-  # Extract the first word of "cc", so it can be a program name with args.
-set dummy cc; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_CC+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$CC"; then
-  ac_cv_prog_CC="$CC" # Let the user override the test.
-else
-  ac_prog_rejected=no
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    if test "$as_dir/$ac_word$ac_exec_ext" = "/usr/ucb/cc"; then
-       ac_prog_rejected=yes
-       continue
-     fi
-    ac_cv_prog_CC="cc"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-if test $ac_prog_rejected = yes; then
-  # We found a bogon in the path, so make sure we never use it.
-  set dummy $ac_cv_prog_CC
-  shift
-  if test $# != 0; then
-    # We chose a different compiler from the bogus one.
-    # However, it has the same basename, so the bogon will be chosen
-    # first if we set CC to just the basename; use the full file name.
-    shift
-    ac_cv_prog_CC="$as_dir/$ac_word${1+' '}$@"
-  fi
-fi
-fi
-fi
-CC=$ac_cv_prog_CC
-if test -n "$CC"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
-$as_echo "$CC" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-fi
-if test -z "$CC"; then
-  if test -n "$ac_tool_prefix"; then
-  for ac_prog in cl.exe
-  do
-    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
-set dummy $ac_tool_prefix$ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_CC+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$CC"; then
-  ac_cv_prog_CC="$CC" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_CC="$ac_tool_prefix$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-CC=$ac_cv_prog_CC
-if test -n "$CC"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
-$as_echo "$CC" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-    test -n "$CC" && break
-  done
-fi
-if test -z "$CC"; then
-  ac_ct_CC=$CC
-  for ac_prog in cl.exe
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_CC+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$ac_ct_CC"; then
-  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_ac_ct_CC="$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-ac_ct_CC=$ac_cv_prog_ac_ct_CC
-if test -n "$ac_ct_CC"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
-$as_echo "$ac_ct_CC" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-  test -n "$ac_ct_CC" && break
-done
-
-  if test "x$ac_ct_CC" = x; then
-    CC=""
-  else
-    case $cross_compiling:$ac_tool_warned in
-yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
-ac_tool_warned=yes ;;
-esac
-    CC=$ac_ct_CC
-  fi
-fi
-
-fi
-
-
-test -z "$CC" && { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "no acceptable C compiler found in \$PATH
-See \`config.log' for more details" "$LINENO" 5; }
-
-# Provide some information about the compiler.
-$as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
-set X $ac_compile
-ac_compiler=$2
-for ac_option in --version -v -V -qversion; do
-  { { ac_try="$ac_compiler $ac_option >&5"
-case "(($ac_try" in
-  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
-  *) ac_try_echo=$ac_try;;
-esac
-eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
-$as_echo "$ac_try_echo"; } >&5
-  (eval "$ac_compiler $ac_option >&5") 2>conftest.err
-  ac_status=$?
-  if test -s conftest.err; then
-    sed '10a\
-... rest of stderr output deleted ...
-         10q' conftest.err >conftest.er1
-    cat conftest.er1 >&5
-  fi
-  rm -f conftest.er1 conftest.err
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }
-done
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are using the GNU C compiler" >&5
-$as_echo_n "checking whether we are using the GNU C compiler... " >&6; }
-if ${ac_cv_c_compiler_gnu+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-#ifndef __GNUC__
-       choke me
-#endif
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  ac_compiler_gnu=yes
-else
-  ac_compiler_gnu=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-ac_cv_c_compiler_gnu=$ac_compiler_gnu
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
-$as_echo "$ac_cv_c_compiler_gnu" >&6; }
-if test $ac_compiler_gnu = yes; then
-  GCC=yes
-else
-  GCC=
-fi
-ac_test_CFLAGS=${CFLAGS+set}
-ac_save_CFLAGS=$CFLAGS
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -g" >&5
-$as_echo_n "checking whether $CC accepts -g... " >&6; }
-if ${ac_cv_prog_cc_g+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_save_c_werror_flag=$ac_c_werror_flag
-   ac_c_werror_flag=yes
-   ac_cv_prog_cc_g=no
-   CFLAGS="-g"
-   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  ac_cv_prog_cc_g=yes
-else
-  CFLAGS=""
-      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-
-else
-  ac_c_werror_flag=$ac_save_c_werror_flag
-	 CFLAGS="-g"
-	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  ac_cv_prog_cc_g=yes
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-   ac_c_werror_flag=$ac_save_c_werror_flag
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
-$as_echo "$ac_cv_prog_cc_g" >&6; }
-if test "$ac_test_CFLAGS" = set; then
-  CFLAGS=$ac_save_CFLAGS
-elif test $ac_cv_prog_cc_g = yes; then
-  if test "$GCC" = yes; then
-    CFLAGS="-g -O2"
-  else
-    CFLAGS="-g"
-  fi
-else
-  if test "$GCC" = yes; then
-    CFLAGS="-O2"
-  else
-    CFLAGS=
-  fi
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $CC option to accept ISO C89" >&5
-$as_echo_n "checking for $CC option to accept ISO C89... " >&6; }
-if ${ac_cv_prog_cc_c89+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_cv_prog_cc_c89=no
-ac_save_CC=$CC
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <stdarg.h>
-#include <stdio.h>
-struct stat;
-/* Most of the following tests are stolen from RCS 5.7's src/conf.sh.  */
-struct buf { int x; };
-FILE * (*rcsopen) (struct buf *, struct stat *, int);
-static char *e (p, i)
-     char **p;
-     int i;
-{
-  return p[i];
-}
-static char *f (char * (*g) (char **, int), char **p, ...)
-{
-  char *s;
-  va_list v;
-  va_start (v,p);
-  s = g (p, va_arg (v,int));
-  va_end (v);
-  return s;
-}
-
-/* OSF 4.0 Compaq cc is some sort of almost-ANSI by default.  It has
-   function prototypes and stuff, but not '\xHH' hex character constants.
-   These don't provoke an error unfortunately, instead are silently treated
-   as 'x'.  The following induces an error, until -std is added to get
-   proper ANSI mode.  Curiously '\x00'!='x' always comes out true, for an
-   array size at least.  It's necessary to write '\x00'==0 to get something
-   that's true only with -std.  */
-int osf4_cc_array ['\x00' == 0 ? 1 : -1];
-
-/* IBM C 6 for AIX is almost-ANSI by default, but it replaces macro parameters
-   inside strings and character constants.  */
-#define FOO(x) 'x'
-int xlc6_cc_array[FOO(a) == 'x' ? 1 : -1];
-
-int test (int i, double x);
-struct s1 {int (*f) (int a);};
-struct s2 {int (*f) (double a);};
-int pairnames (int, char **, FILE *(*)(struct buf *, struct stat *, int), int, int);
-int argc;
-char **argv;
-int
-main ()
-{
-return f (e, argv, 0) != argv[0]  ||  f (e, argv, 1) != argv[1];
-  ;
-  return 0;
-}
-_ACEOF
-for ac_arg in '' -qlanglvl=extc89 -qlanglvl=ansi -std \
-	-Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
-do
-  CC="$ac_save_CC $ac_arg"
-  if ac_fn_c_try_compile "$LINENO"; then :
-  ac_cv_prog_cc_c89=$ac_arg
-fi
-rm -f core conftest.err conftest.$ac_objext
-  test "x$ac_cv_prog_cc_c89" != "xno" && break
-done
-rm -f conftest.$ac_ext
-CC=$ac_save_CC
-
-fi
-# AC_CACHE_VAL
-case "x$ac_cv_prog_cc_c89" in
-  x)
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
-$as_echo "none needed" >&6; } ;;
-  xno)
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
-$as_echo "unsupported" >&6; } ;;
-  *)
-    CC="$CC $ac_cv_prog_cc_c89"
-    { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
-$as_echo "$ac_cv_prog_cc_c89" >&6; } ;;
-esac
-if test "x$ac_cv_prog_cc_c89" != xno; then :
-
-fi
-
-ac_ext=c
-ac_cpp='$CPP $CPPFLAGS'
-ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
-ac_compiler_gnu=$ac_cv_c_compiler_gnu
-
-ac_ext=c
-ac_cpp='$CPP $CPPFLAGS'
-ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
-ac_compiler_gnu=$ac_cv_c_compiler_gnu
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC understands -c and -o together" >&5
-$as_echo_n "checking whether $CC understands -c and -o together... " >&6; }
-if ${am_cv_prog_cc_c_o+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-  # Make sure it works both with $CC and with simple cc.
-  # Following AC_PROG_CC_C_O, we do the test twice because some
-  # compilers refuse to overwrite an existing .o file with -o,
-  # though they will create one.
-  am_cv_prog_cc_c_o=yes
-  for am_i in 1 2; do
-    if { echo "$as_me:$LINENO: $CC -c conftest.$ac_ext -o conftest2.$ac_objext" >&5
-   ($CC -c conftest.$ac_ext -o conftest2.$ac_objext) >&5 2>&5
-   ac_status=$?
-   echo "$as_me:$LINENO: \$? = $ac_status" >&5
-   (exit $ac_status); } \
-         && test -f conftest2.$ac_objext; then
-      : OK
-    else
-      am_cv_prog_cc_c_o=no
-      break
-    fi
-  done
-  rm -f core conftest*
-  unset am_i
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $am_cv_prog_cc_c_o" >&5
-$as_echo "$am_cv_prog_cc_c_o" >&6; }
-if test "$am_cv_prog_cc_c_o" != yes; then
-   # Losing compiler, so override with the script.
-   # FIXME: It is wrong to rewrite CC.
-   # But if we don't then we get into trouble of one sort or another.
-   # A longer-term fix would be to have automake use am__CC in this case,
-   # and then we could set am__CC="\$(top_srcdir)/compile \$(CC)"
-   CC="$am_aux_dir/compile $CC"
-fi
-ac_ext=c
-ac_cpp='$CPP $CPPFLAGS'
-ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
-ac_compiler_gnu=$ac_cv_c_compiler_gnu
-
-
-depcc="$CC"   am_compiler_list=
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking dependency style of $depcc" >&5
-$as_echo_n "checking dependency style of $depcc... " >&6; }
-if ${am_cv_CC_dependencies_compiler_type+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -z "$AMDEP_TRUE" && test -f "$am_depcomp"; then
-  # We make a subdir and do the tests there.  Otherwise we can end up
-  # making bogus files that we don't know about and never remove.  For
-  # instance it was reported that on HP-UX the gcc test will end up
-  # making a dummy file named 'D' -- because '-MD' means "put the output
-  # in D".
-  rm -rf conftest.dir
-  mkdir conftest.dir
-  # Copy depcomp to subdir because otherwise we won't find it if we're
-  # using a relative directory.
-  cp "$am_depcomp" conftest.dir
-  cd conftest.dir
-  # We will build objects and dependencies in a subdirectory because
-  # it helps to detect inapplicable dependency modes.  For instance
-  # both Tru64's cc and ICC support -MD to output dependencies as a
-  # side effect of compilation, but ICC will put the dependencies in
-  # the current directory while Tru64 will put them in the object
-  # directory.
-  mkdir sub
-
-  am_cv_CC_dependencies_compiler_type=none
-  if test "$am_compiler_list" = ""; then
-     am_compiler_list=`sed -n 's/^#*\([a-zA-Z0-9]*\))$/\1/p' < ./depcomp`
-  fi
-  am__universal=false
-  case " $depcc " in #(
-     *\ -arch\ *\ -arch\ *) am__universal=true ;;
-     esac
-
-  for depmode in $am_compiler_list; do
-    # Setup a source with many dependencies, because some compilers
-    # like to wrap large dependency lists on column 80 (with \), and
-    # we should not choose a depcomp mode which is confused by this.
-    #
-    # We need to recreate these files for each test, as the compiler may
-    # overwrite some of them when testing with obscure command lines.
-    # This happens at least with the AIX C compiler.
-    : > sub/conftest.c
-    for i in 1 2 3 4 5 6; do
-      echo '#include "conftst'$i'.h"' >> sub/conftest.c
-      # Using ": > sub/conftst$i.h" creates only sub/conftst1.h with
-      # Solaris 10 /bin/sh.
-      echo '/* dummy */' > sub/conftst$i.h
-    done
-    echo "${am__include} ${am__quote}sub/conftest.Po${am__quote}" > confmf
-
-    # We check with '-c' and '-o' for the sake of the "dashmstdout"
-    # mode.  It turns out that the SunPro C++ compiler does not properly
-    # handle '-M -o', and we need to detect this.  Also, some Intel
-    # versions had trouble with output in subdirs.
-    am__obj=sub/conftest.${OBJEXT-o}
-    am__minus_obj="-o $am__obj"
-    case $depmode in
-    gcc)
-      # This depmode causes a compiler race in universal mode.
-      test "$am__universal" = false || continue
-      ;;
-    nosideeffect)
-      # After this tag, mechanisms are not by side-effect, so they'll
-      # only be used when explicitly requested.
-      if test "x$enable_dependency_tracking" = xyes; then
-	continue
-      else
-	break
-      fi
-      ;;
-    msvc7 | msvc7msys | msvisualcpp | msvcmsys)
-      # This compiler won't grok '-c -o', but also, the minuso test has
-      # not run yet.  These depmodes are late enough in the game, and
-      # so weak that their functioning should not be impacted.
-      am__obj=conftest.${OBJEXT-o}
-      am__minus_obj=
-      ;;
-    none) break ;;
-    esac
-    if depmode=$depmode \
-       source=sub/conftest.c object=$am__obj \
-       depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo \
-       $SHELL ./depcomp $depcc -c $am__minus_obj sub/conftest.c \
-         >/dev/null 2>conftest.err &&
-       grep sub/conftst1.h sub/conftest.Po > /dev/null 2>&1 &&
-       grep sub/conftst6.h sub/conftest.Po > /dev/null 2>&1 &&
-       grep $am__obj sub/conftest.Po > /dev/null 2>&1 &&
-       ${MAKE-make} -s -f confmf > /dev/null 2>&1; then
-      # icc doesn't choke on unknown options, it will just issue warnings
-      # or remarks (even with -Werror).  So we grep stderr for any message
-      # that says an option was ignored or not supported.
-      # When given -MP, icc 7.0 and 7.1 complain thusly:
-      #   icc: Command line warning: ignoring option '-M'; no argument required
-      # The diagnosis changed in icc 8.0:
-      #   icc: Command line remark: option '-MP' not supported
-      if (grep 'ignoring option' conftest.err ||
-          grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
-        am_cv_CC_dependencies_compiler_type=$depmode
-        break
-      fi
-    fi
-  done
-
-  cd ..
-  rm -rf conftest.dir
-else
-  am_cv_CC_dependencies_compiler_type=none
-fi
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $am_cv_CC_dependencies_compiler_type" >&5
-$as_echo "$am_cv_CC_dependencies_compiler_type" >&6; }
-CCDEPMODE=depmode=$am_cv_CC_dependencies_compiler_type
-
- if
-  test "x$enable_dependency_tracking" != xno \
-  && test "$am_cv_CC_dependencies_compiler_type" = gcc3; then
-  am__fastdepCC_TRUE=
-  am__fastdepCC_FALSE='#'
-else
-  am__fastdepCC_TRUE='#'
-  am__fastdepCC_FALSE=
-fi
-
-
-
-
-  OPENMP_CFLAGS=
+  OPENMP_CXXFLAGS=
   # Check whether --enable-openmp was given.
 if test "${enable_openmp+set}" = set; then :
   enableval=$enable_openmp;
 fi
 
   if test "$enable_openmp" != no; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $CC option to support OpenMP" >&5
-$as_echo_n "checking for $CC option to support OpenMP... " >&6; }
-if ${ac_cv_prog_c_openmp+:} false; then :
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $CXX option to support OpenMP" >&5
+$as_echo_n "checking for $CXX option to support OpenMP... " >&6; }
+if ${ac_cv_prog_cxx_openmp+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -4419,14 +3651,14 @@ else
 int main () { return omp_get_num_threads (); }
 
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_prog_c_openmp='none needed'
+if ac_fn_cxx_try_link "$LINENO"; then :
+  ac_cv_prog_cxx_openmp='none needed'
 else
-  ac_cv_prog_c_openmp='unsupported'
+  ac_cv_prog_cxx_openmp='unsupported'
 	  	  	  	  	  	  	                                	  	  	  	  	  	  for ac_option in -fopenmp -xopenmp -openmp -mp -omp -qsmp=omp -homp \
                            -Popenmp --openmp; do
-	    ac_save_CFLAGS=$CFLAGS
-	    CFLAGS="$CFLAGS $ac_option"
+	    ac_save_CXXFLAGS=$CXXFLAGS
+	    CXXFLAGS="$CXXFLAGS $ac_option"
 	    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -4437,13 +3669,13 @@ else
 int main () { return omp_get_num_threads (); }
 
 _ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_prog_c_openmp=$ac_option
+if ac_fn_cxx_try_link "$LINENO"; then :
+  ac_cv_prog_cxx_openmp=$ac_option
 fi
 rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext conftest.$ac_ext
-	    CFLAGS=$ac_save_CFLAGS
-	    if test "$ac_cv_prog_c_openmp" != unsupported; then
+	    CXXFLAGS=$ac_save_CXXFLAGS
+	    if test "$ac_cv_prog_cxx_openmp" != unsupported; then
 	      break
 	    fi
 	  done
@@ -4451,13 +3683,13 @@ fi
 rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext conftest.$ac_ext
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_c_openmp" >&5
-$as_echo "$ac_cv_prog_c_openmp" >&6; }
-    case $ac_cv_prog_c_openmp in #(
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cxx_openmp" >&5
+$as_echo "$ac_cv_prog_cxx_openmp" >&6; }
+    case $ac_cv_prog_cxx_openmp in #(
       "none needed" | unsupported)
 	;; #(
       *)
-	OPENMP_CFLAGS=$ac_cv_prog_c_openmp ;;
+	OPENMP_CXXFLAGS=$ac_cv_prog_cxx_openmp ;;
     esac
   fi
 
@@ -4559,26 +3791,22 @@ fi
 #AX_GCC_VAR_ATTRIBUTE(aligned)
 
 # Checks for header files.
-ac_ext=c
-ac_cpp='$CPP $CPPFLAGS'
-ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
-ac_compiler_gnu=$ac_cv_c_compiler_gnu
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to run the C preprocessor" >&5
-$as_echo_n "checking how to run the C preprocessor... " >&6; }
-# On Suns, sometimes $CPP names a directory.
-if test -n "$CPP" && test -d "$CPP"; then
-  CPP=
-fi
-if test -z "$CPP"; then
-  if ${ac_cv_prog_CPP+:} false; then :
+ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking how to run the C++ preprocessor" >&5
+$as_echo_n "checking how to run the C++ preprocessor... " >&6; }
+if test -z "$CXXCPP"; then
+  if ${ac_cv_prog_CXXCPP+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-      # Double quotes because CPP needs to be expanded
-    for CPP in "$CC -E" "$CC -E -traditional-cpp" "/lib/cpp"
+      # Double quotes because CXXCPP needs to be expanded
+    for CXXCPP in "$CXX -E" "/lib/cpp"
     do
       ac_preproc_ok=false
-for ac_c_preproc_warn_flag in '' yes
+for ac_cxx_preproc_warn_flag in '' yes
 do
   # Use a header file that comes with gcc, so configuring glibc
   # with a fresh cross-compiler works.
@@ -4595,7 +3823,7 @@ do
 #endif
 		     Syntax error
 _ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
+if ac_fn_cxx_try_cpp "$LINENO"; then :
 
 else
   # Broken: fails on valid input.
@@ -4609,7 +3837,7 @@ rm -f conftest.err conftest.i conftest.$ac_ext
 /* end confdefs.h.  */
 #include <ac_nonexistent.h>
 _ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
+if ac_fn_cxx_try_cpp "$LINENO"; then :
   # Broken: success on invalid input.
 continue
 else
@@ -4627,17 +3855,17 @@ if $ac_preproc_ok; then :
 fi
 
     done
-    ac_cv_prog_CPP=$CPP
+    ac_cv_prog_CXXCPP=$CXXCPP
 
 fi
-  CPP=$ac_cv_prog_CPP
+  CXXCPP=$ac_cv_prog_CXXCPP
 else
-  ac_cv_prog_CPP=$CPP
+  ac_cv_prog_CXXCPP=$CXXCPP
 fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $CPP" >&5
-$as_echo "$CPP" >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $CXXCPP" >&5
+$as_echo "$CXXCPP" >&6; }
 ac_preproc_ok=false
-for ac_c_preproc_warn_flag in '' yes
+for ac_cxx_preproc_warn_flag in '' yes
 do
   # Use a header file that comes with gcc, so configuring glibc
   # with a fresh cross-compiler works.
@@ -4654,7 +3882,7 @@ do
 #endif
 		     Syntax error
 _ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
+if ac_fn_cxx_try_cpp "$LINENO"; then :
 
 else
   # Broken: fails on valid input.
@@ -4668,7 +3896,7 @@ rm -f conftest.err conftest.i conftest.$ac_ext
 /* end confdefs.h.  */
 #include <ac_nonexistent.h>
 _ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
+if ac_fn_cxx_try_cpp "$LINENO"; then :
   # Broken: success on invalid input.
 continue
 else
@@ -4686,15 +3914,15 @@ if $ac_preproc_ok; then :
 else
   { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "C preprocessor \"$CPP\" fails sanity check
+as_fn_error $? "C++ preprocessor \"$CXXCPP\" fails sanity check
 See \`config.log' for more details" "$LINENO" 5; }
 fi
 
-ac_ext=c
-ac_cpp='$CPP $CPPFLAGS'
-ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
-ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
-ac_compiler_gnu=$ac_cv_c_compiler_gnu
+ac_ext=cpp
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
 
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
@@ -4847,7 +4075,7 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
+if ac_fn_cxx_try_compile "$LINENO"; then :
   ac_cv_header_stdc=yes
 else
   ac_cv_header_stdc=no
@@ -4920,7 +4148,7 @@ main ()
   return 0;
 }
 _ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
+if ac_fn_cxx_try_run "$LINENO"; then :
 
 else
   ac_cv_header_stdc=no
@@ -4944,7 +4172,7 @@ for ac_header in sys/types.h sys/stat.h stdlib.h string.h memory.h strings.h \
 		  inttypes.h stdint.h unistd.h
 do :
   as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
-ac_fn_c_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default
+ac_fn_cxx_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default
 "
 if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
   cat >>confdefs.h <<_ACEOF
@@ -4958,7 +4186,7 @@ done
 
 for ac_header in stdint.h
 do :
-  ac_fn_c_check_header_mongrel "$LINENO" "stdint.h" "ac_cv_header_stdint_h" "$ac_includes_default"
+  ac_fn_cxx_check_header_mongrel "$LINENO" "stdint.h" "ac_cv_header_stdint_h" "$ac_includes_default"
 if test "x$ac_cv_header_stdint_h" = xyes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_STDINT_H 1
@@ -4970,7 +4198,7 @@ done
 
 for ac_header in malloc/malloc.h
 do :
-  ac_fn_c_check_header_mongrel "$LINENO" "malloc/malloc.h" "ac_cv_header_malloc_malloc_h" "$ac_includes_default"
+  ac_fn_cxx_check_header_mongrel "$LINENO" "malloc/malloc.h" "ac_cv_header_malloc_malloc_h" "$ac_includes_default"
 if test "x$ac_cv_header_malloc_malloc_h" = xyes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_MALLOC_MALLOC_H 1
@@ -4982,7 +4210,7 @@ done
 
 for ac_header in malloc.h
 do :
-  ac_fn_c_check_header_mongrel "$LINENO" "malloc.h" "ac_cv_header_malloc_h" "$ac_includes_default"
+  ac_fn_cxx_check_header_mongrel "$LINENO" "malloc.h" "ac_cv_header_malloc_h" "$ac_includes_default"
 if test "x$ac_cv_header_malloc_h" = xyes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_MALLOC_H 1
@@ -4994,7 +4222,7 @@ done
 
 for ac_header in endian.h
 do :
-  ac_fn_c_check_header_mongrel "$LINENO" "endian.h" "ac_cv_header_endian_h" "$ac_includes_default"
+  ac_fn_cxx_check_header_mongrel "$LINENO" "endian.h" "ac_cv_header_endian_h" "$ac_includes_default"
 if test "x$ac_cv_header_endian_h" = xyes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_ENDIAN_H 1
@@ -5005,7 +4233,7 @@ fi
 done
 
 #AC_CHECK_HEADERS(machine/endian.h)
-ac_fn_c_check_decl "$LINENO" "ntohll" "ac_cv_have_decl_ntohll" "#include <arpa/inet.h>
+ac_fn_cxx_check_decl "$LINENO" "ntohll" "ac_cv_have_decl_ntohll" "#include <arpa/inet.h>
 "
 if test "x$ac_cv_have_decl_ntohll" = xyes; then :
   ac_have_decl=1
@@ -5017,7 +4245,7 @@ cat >>confdefs.h <<_ACEOF
 #define HAVE_DECL_NTOHLL $ac_have_decl
 _ACEOF
 
-ac_fn_c_check_decl "$LINENO" "be64toh" "ac_cv_have_decl_be64toh" "#include <arpa/inet.h>
+ac_fn_cxx_check_decl "$LINENO" "be64toh" "ac_cv_have_decl_be64toh" "#include <arpa/inet.h>
 "
 if test "x$ac_cv_have_decl_be64toh" = xyes; then :
   ac_have_decl=1
@@ -5031,7 +4259,7 @@ _ACEOF
 
 
 # Checks for typedefs, structures, and compiler characteristics.
-ac_fn_c_check_type "$LINENO" "size_t" "ac_cv_type_size_t" "$ac_includes_default"
+ac_fn_cxx_check_type "$LINENO" "size_t" "ac_cv_type_size_t" "$ac_includes_default"
 if test "x$ac_cv_type_size_t" = xyes; then :
 
 else
@@ -5074,7 +4302,7 @@ _ACEOF
 # Checks for library functions.
 for ac_func in gettimeofday
 do :
-  ac_fn_c_check_func "$LINENO" "gettimeofday" "ac_cv_func_gettimeofday"
+  ac_fn_cxx_check_func "$LINENO" "gettimeofday" "ac_cv_func_gettimeofday"
 if test "x$ac_cv_func_gettimeofday" = xyes; then :
   cat >>confdefs.h <<_ACEOF
 #define HAVE_GETTIMEOFDAY 1
@@ -5309,10 +4537,6 @@ if test -z "${am__fastdepCXX_TRUE}" && test -z "${am__fastdepCXX_FALSE}"; then
   as_fn_error $? "conditional \"am__fastdepCXX\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
-if test -z "${am__fastdepCC_TRUE}" && test -z "${am__fastdepCC_FALSE}"; then
-  as_fn_error $? "conditional \"am__fastdepCC\" was never defined.
-Usually this means the macro was only invoked conditionally." "$LINENO" 5
-fi
 if test -z "${BUILD_COMMS_MPI_TRUE}" && test -z "${BUILD_COMMS_MPI_FALSE}"; then
   as_fn_error $? "conditional \"BUILD_COMMS_MPI\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
diff --git a/configure-commands b/configure-commands
index d22e9fdd..8ba2dac1 100644
--- a/configure-commands
+++ b/configure-commands
@@ -1,3 +1,4 @@
+CXX=clang-omp++ ./configure --enable-simd=AVX CXXFLAGS="-mavx -fopenmp -O3 -I/opt/local/include/openmpi-mp/ -std=c++11" LDFLAGS=-L/opt/local/lib/openmpi-mp/ LIBS="-lmpi -lmpi_cxx -fopenmp"  --enable-comms=mpi
 CXX=clang++ ./configure --enable-simd=AVX CXXFLAGS="-mavx -O3 -I/opt/local/include/openmpi-mp/ -std=c++11" LDFLAGS=-L/opt/local/lib/openmpi-mp/ LIBS="-lmpi -lmpi_cxx"  --enable-comms=mpi
 CXX=clang++ ./configure --enable-simd=AVX CXXFLAGS="-mavx -g -I/opt/local/include/openmpi-mp/ -std=c++11" LDFLAGS=-L/opt/local/lib/openmpi-mp/ LIBS="-lmpi -lmpi_cxx"  --enable-comms=mpi
 CXX=clang++ ./configure --enable-simd=AVX CXXFLAGS="-mavx -g  -std=c++11" LDFLAGS= LIBS=-lmpi  --enable-comms=fake
diff --git a/configure.ac b/configure.ac
index ce73ffd9..86f4b70c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6,6 +6,7 @@ AC_CONFIG_SRCDIR([lib/Grid.h])
 AC_CONFIG_HEADERS([lib/Grid_config.h])
 
 # Checks for programs.
+AC_LANG(C++)
 AC_PROG_CXX
 AC_OPENMP
 AC_PROG_RANLIB
diff --git a/lib/Grid.h b/lib/Grid.h
index bd7b371a..f46f7bf5 100644
--- a/lib/Grid.h
+++ b/lib/Grid.h
@@ -24,21 +24,21 @@
 #include <stdio.h>
 #include <signal.h>
 
+#ifndef MAX
+#define MAX(x,y) ((x)>(y)?(x):(y))
+#define MIN(x,y) ((x)>(y)?(y):(x))
+#endif
+
 #include <Grid_config.h>
 
 ////////////////////////////////////////////////////////////
 // Tunable header includes
 ////////////////////////////////////////////////////////////
 
-#ifdef HAVE_OPENMP
-#define OMP
-#include <omp.h>
-#endif
 
 #ifdef HAVE_MALLOC_MALLOC_H
 #include <malloc/malloc.h>
 #endif
-
 #ifdef HAVE_MALLOC_H
 #include <malloc.h>
 #endif
diff --git a/lib/Grid_stencil.h b/lib/Grid_stencil.h
index fa537f65..ce987746 100644
--- a/lib/Grid_stencil.h
+++ b/lib/Grid_stencil.h
@@ -250,7 +250,11 @@ namespace Grid {
 	  int buffer_size = _grid->_slice_nblock[dimension]*_grid->_slice_block[dimension];
 	  int words = sizeof(cobj)/sizeof(vector_type);
 
-	  /* FIXME ALTERNATE BUFFER DETERMINATION ; possibly slow to allocate*/
+	  /*
+	   * possibly slow to allocate
+	   * Doesn't matter in this test, but may want to preallocate in the 
+	   * dirac operators
+	   */
 	  std::vector<std::vector<scalar_object> > send_buf_extract(Nsimd,std::vector<scalar_object>(buffer_size) ); 
 	  std::vector<std::vector<scalar_object> > recv_buf_extract(Nsimd,std::vector<scalar_object>(buffer_size) );
 	  int bytes = buffer_size*sizeof(scalar_object);
diff --git a/lib/Grid_threads.h b/lib/Grid_threads.h
index 6c5f17e0..89a56d80 100644
--- a/lib/Grid_threads.h
+++ b/lib/Grid_threads.h
@@ -1,13 +1,17 @@
 #ifndef GRID_THREADS_H
 #define GRID_THREADS_H
 
-#ifdef HAVE_OPENMP
+#ifdef _OPENMP
+#define GRID_OMP
+#endif
+
+#ifdef GRID_OMP
 #include <omp.h>
 #define PARALLEL_FOR_LOOP _Pragma("omp parallel for")
-#define PARALLEL_NESTED_LOOP(n) _Pragma("omp parallel for collapse(" #n ")")
+#define PARALLEL_NESTED_LOOP2 _Pragma("omp parallel for collapse(2)")
 #else
 #define PARALLEL_FOR_LOOP 
-#define PARALLEL_NESTED_LOOP(n) 
+#define PARALLEL_NESTED_LOOP2
 #endif
 
 namespace Grid {
@@ -20,7 +24,7 @@ class GridThread {
   static int _threads;
 
   static void SetThreads(int thr) { 
-#ifdef HAVE_OPENMP
+#ifdef GRID_OMP
     _threads = MIN(thr,omp_get_max_threads()) ;
     omp_set_num_threads(_threads);
 #else 
@@ -28,7 +32,7 @@ class GridThread {
 #endif
   };
   static void SetMaxThreads(void) { 
-#ifdef HAVE_OPENMP
+#ifdef GRID_OMP
     _threads = omp_get_max_threads();
     omp_set_num_threads(_threads);
 #else 
@@ -58,7 +62,7 @@ class GridThread {
   };
 
   static int  ThreadBarrier(void) {
-#ifdef HAVE_OPENMP
+#ifdef GRID_OMP
 #pragma omp barrier
     return omp_get_thread_num();
 #else
diff --git a/lib/cshift/Grid_cshift_common.h b/lib/cshift/Grid_cshift_common.h
index 9864df73..c212171e 100644
--- a/lib/cshift/Grid_cshift_common.h
+++ b/lib/cshift/Grid_cshift_common.h
@@ -26,16 +26,15 @@ Gather_plane_simple (const Lattice<vobj> &rhs,std::vector<cobj,alignedAllocator<
   }
 
   int so  = plane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
-  int bo  = 0;                                      // offset in buffer
   
-PARALLEL_NESTED_LOOP(2)
+PARALLEL_NESTED_LOOP2
   for(int n=0;n<rhs._grid->_slice_nblock[dimension];n++){
     for(int b=0;b<rhs._grid->_slice_block[dimension];b++){
-      int o = n*rhs._grid->_slice_stride[dimension];
+      int o  = n*rhs._grid->_slice_stride[dimension];
+      int bo = n*rhs._grid->_slice_block[dimension];
       int ocb=1<<rhs._grid->CheckerBoardFromOindex(o+b);// Could easily be a table lookup
       if ( ocb &cbmask ) {
-	buffer[bo]=compress(rhs._odata[so+o+b]);
-	bo++;
+	buffer[bo+b]=compress(rhs._odata[so+o+b]);
       }
     }
   }
@@ -55,9 +54,8 @@ Gather_plane_extract(const Lattice<vobj> &rhs,std::vector<typename cobj::scalar_
   }
 
   int so  = plane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
-  int bo  = 0;                                      // offset in buffer
     
-PARALLEL_NESTED_LOOP(2)
+PARALLEL_NESTED_LOOP2
   for(int n=0;n<rhs._grid->_slice_nblock[dimension];n++){
     for(int b=0;b<rhs._grid->_slice_block[dimension];b++){
 
@@ -104,15 +102,15 @@ template<class vobj> void Scatter_plane_simple (Lattice<vobj> &rhs,std::vector<v
   }
 
   int so  = plane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
-  int bo  = 0;                                      // offset in buffer
     
-PARALLEL_NESTED_LOOP(2)
+PARALLEL_NESTED_LOOP2
   for(int n=0;n<rhs._grid->_slice_nblock[dimension];n++){
     for(int b=0;b<rhs._grid->_slice_block[dimension];b++){
-      int o=n*rhs._grid->_slice_stride[dimension];
+      int o   =n*rhs._grid->_slice_stride[dimension];
+      int bo  =n*rhs._grid->_slice_block[dimension];
       int ocb=1<<rhs._grid->CheckerBoardFromOindex(o+b);// Could easily be a table lookup
       if ( ocb & cbmask ) {
-	rhs._odata[so+o+b]=buffer[bo++];
+	rhs._odata[so+o+b]=buffer[bo+b];
       }
     }
   }
@@ -131,7 +129,7 @@ PARALLEL_NESTED_LOOP(2)
 
   int so  = plane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
     
-PARALLEL_NESTED_LOOP(2)
+PARALLEL_NESTED_LOOP2
   for(int n=0;n<rhs._grid->_slice_nblock[dimension];n++){
     for(int b=0;b<rhs._grid->_slice_block[dimension];b++){
 
@@ -160,7 +158,7 @@ template<class vobj> void Copy_plane(Lattice<vobj>& lhs,Lattice<vobj> &rhs, int
   int ro  = rplane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
   int lo  = lplane*lhs._grid->_ostride[dimension]; // base offset for start of plane 
   
-PARALLEL_NESTED_LOOP(2)
+PARALLEL_NESTED_LOOP2
   for(int n=0;n<rhs._grid->_slice_nblock[dimension];n++){
     for(int b=0;b<rhs._grid->_slice_block[dimension];b++){
       
@@ -185,7 +183,7 @@ template<class vobj> void Copy_plane_permute(Lattice<vobj>& lhs,Lattice<vobj> &r
   int ro  = rplane*rhs._grid->_ostride[dimension]; // base offset for start of plane 
   int lo  = lplane*lhs._grid->_ostride[dimension]; // base offset for start of plane 
   
-PARALLEL_NESTED_LOOP(2)
+PARALLEL_NESTED_LOOP2
   for(int n=0;n<rhs._grid->_slice_nblock[dimension];n++){
     for(int b=0;b<rhs._grid->_slice_block[dimension];b++){
       int o =n*rhs._grid->_slice_stride[dimension];
diff --git a/lib/cshift/Grid_cshift_mpi.h b/lib/cshift/Grid_cshift_mpi.h
index 7c77ebc9..569017d8 100644
--- a/lib/cshift/Grid_cshift_mpi.h
+++ b/lib/cshift/Grid_cshift_mpi.h
@@ -1,10 +1,6 @@
 #ifndef _GRID_CSHIFT_MPI_H_
 #define _GRID_CSHIFT_MPI_H_
 
-#ifndef MAX
-#define MAX(x,y) ((x)>(y)?(x):(y))
-#define MIN(x,y) ((x)>(y)?(y):(x))
-#endif
 
 namespace Grid { 
 
diff --git a/lib/qcd/Grid_qcd_wilson_dop.cc b/lib/qcd/Grid_qcd_wilson_dop.cc
index f657208a..25f1d914 100644
--- a/lib/qcd/Grid_qcd_wilson_dop.cc
+++ b/lib/qcd/Grid_qcd_wilson_dop.cc
@@ -100,22 +100,21 @@ void WilsonMatrix::Dhop(const LatticeFermion &in, LatticeFermion &out)
   vHalfSpinColourVector  chi;    
   vSpinColourVector result;
   vHalfSpinColourVector Uchi;
-  vHalfSpinColourVector *chi_p;
   int offset,local,perm, ptype;
 
 PARALLEL_FOR_LOOP
   for(int sss=0;sss<grid->oSites();sss++){
 
     int ss = sss;
-    int ssu= sss;
-    //int ss = Stencil._LebesgueReorder[sss];
+    int ssu= ss;
+    //    int ss = Stencil._LebesgueReorder[sss];
 
     // Xp
     offset = Stencil._offsets [Xp][ss];
     local  = Stencil._is_local[Xp][ss];
     perm   = Stencil._permute[Xp][ss];
     ptype  = Stencil._permute_type[Xp];
-    chi_p  = &comm_buf[offset];
+
     if ( local && perm ) 
     {
       spProjXp(tmp,in._odata[offset]);