diff --git a/configure b/configure
index 16d9f357..c4db5d56 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.66 for MLD2P4 2.0.
+# Generated by GNU Autoconf 2.68 for MLD2P4 2.0.
 #
 # Report bugs to <bugreport@mld2p4.it>.
 #
@@ -91,6 +91,7 @@ fi
 IFS=" ""	$as_nl"
 
 # Find who we are.  Look in the path if we contain no directory separator.
+as_myself=
 case $0 in #((
   *[\\/]* ) as_myself=$0 ;;
   *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -216,11 +217,18 @@ IFS=$as_save_IFS
   # We cannot yet assume a decent shell, so we have to provide a
 	# neutralization value for shells without unset; and this also
 	# works around shells that cannot unset nonexistent variables.
+	# Preserve -v and -x to the replacement shell.
 	BASH_ENV=/dev/null
 	ENV=/dev/null
 	(unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
 	export CONFIG_SHELL
-	exec "$CONFIG_SHELL" "$as_myself" ${1+"$@"}
+	case $- in # ((((
+	  *v*x* | *x*v* ) as_opts=-vx ;;
+	  *v* ) as_opts=-v ;;
+	  *x* ) as_opts=-x ;;
+	  * ) as_opts= ;;
+	esac
+	exec "$CONFIG_SHELL" $as_opts "$as_myself" ${1+"$@"}
 fi
 
     if test x$as_have_required = xno; then :
@@ -761,8 +769,9 @@ do
   fi
 
   case $ac_option in
-  *=*)	ac_optarg=`expr "X$ac_option" : '[^=]*=\(.*\)'` ;;
-  *)	ac_optarg=yes ;;
+  *=?*) ac_optarg=`expr "X$ac_option" : '[^=]*=\(.*\)'` ;;
+  *=)   ac_optarg= ;;
+  *)    ac_optarg=yes ;;
   esac
 
   # Accept the important Cygnus configure options, so we can diagnose typos.
@@ -1102,7 +1111,7 @@ Try \`$0 --help' for more information"
     $as_echo "$as_me: WARNING: you should use --build, --host, --target" >&2
     expr "x$ac_option" : ".*[^-._$as_cr_alnum]" >/dev/null &&
       $as_echo "$as_me: WARNING: invalid host type: $ac_option" >&2
-    : ${build_alias=$ac_option} ${host_alias=$ac_option} ${target_alias=$ac_option}
+    : "${build_alias=$ac_option} ${host_alias=$ac_option} ${target_alias=$ac_option}"
     ;;
 
   esac
@@ -1420,7 +1429,7 @@ test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
 MLD2P4 configure 2.0
-generated by GNU Autoconf 2.66
+generated by GNU Autoconf 2.68
 
 Copyright (C) 2010 Free Software Foundation, Inc.
 This configure script is free software; the Free Software Foundation
@@ -1466,7 +1475,7 @@ sed 's/^/| /' conftest.$ac_ext >&5
 
 	ac_retval=1
 fi
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_fc_try_compile
@@ -1504,7 +1513,7 @@ sed 's/^/| /' conftest.$ac_ext >&5
 
 	ac_retval=1
 fi
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_compile
@@ -1530,7 +1539,7 @@ $as_echo "$ac_try_echo"; } >&5
     mv -f conftest.er1 conftest.err
   fi
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; } >/dev/null && {
+  test $ac_status = 0; } > conftest.i && {
 	 test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" ||
 	 test ! -s conftest.err
        }; then :
@@ -1541,7 +1550,7 @@ sed 's/^/| /' conftest.$ac_ext >&5
 
     ac_retval=1
 fi
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_cpp
@@ -1554,10 +1563,10 @@ fi
 ac_fn_c_check_header_mongrel ()
 {
   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  if eval "test \"\${$3+set}\"" = set; then :
+  if eval \${$3+:} false; then :
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
 $as_echo_n "checking for $2... " >&6; }
-if eval "test \"\${$3+set}\"" = set; then :
+if eval \${$3+:} false; then :
   $as_echo_n "(cached) " >&6
 fi
 eval ac_res=\$$3
@@ -1593,7 +1602,7 @@ if ac_fn_c_try_cpp "$LINENO"; then :
 else
   ac_header_preproc=no
 fi
-rm -f conftest.err conftest.$ac_ext
+rm -f conftest.err conftest.i conftest.$ac_ext
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_header_preproc" >&5
 $as_echo "$ac_header_preproc" >&6; }
 
@@ -1624,7 +1633,7 @@ $as_echo "$as_me: WARNING: $2: proceeding with the compiler's result" >&2;}
 esac
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
 $as_echo_n "checking for $2... " >&6; }
-if eval "test \"\${$3+set}\"" = set; then :
+if eval \${$3+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   eval "$3=\$ac_header_compiler"
@@ -1633,7 +1642,7 @@ eval ac_res=\$$3
 	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 $as_echo "$ac_res" >&6; }
 fi
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_c_check_header_mongrel
 
@@ -1674,7 +1683,7 @@ sed 's/^/| /' conftest.$ac_ext >&5
        ac_retval=$ac_status
 fi
   rm -rf conftest.dSYM conftest_ipa8_conftest.oo
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_run
@@ -1688,7 +1697,7 @@ ac_fn_c_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
 $as_echo_n "checking for $2... " >&6; }
-if eval "test \"\${$3+set}\"" = set; then :
+if eval \${$3+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -1706,7 +1715,7 @@ fi
 eval ac_res=\$$3
 	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 $as_echo "$ac_res" >&6; }
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_c_check_header_compile
 
@@ -1751,7 +1760,7 @@ fi
   # interfere with the next link command; also delete a directory that is
   # left behind by Apple's compiler.  We do this before executing the actions.
   rm -rf conftest.dSYM conftest_ipa8_conftest.oo
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_try_link
@@ -1764,7 +1773,7 @@ ac_fn_c_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
 $as_echo_n "checking for $2... " >&6; }
-if eval "test \"\${$3+set}\"" = set; then :
+if eval \${$3+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -1819,7 +1828,7 @@ fi
 eval ac_res=\$$3
 	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 $as_echo "$ac_res" >&6; }
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_c_check_func
 
@@ -1856,7 +1865,7 @@ sed 's/^/| /' conftest.$ac_ext >&5
 
 	ac_retval=1
 fi
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_f77_try_compile
@@ -1902,7 +1911,7 @@ fi
   # interfere with the next link command; also delete a directory that is
   # left behind by Apple's compiler.  We do this before executing the actions.
   rm -rf conftest.dSYM conftest_ipa8_conftest.oo
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_f77_try_link
@@ -1948,7 +1957,7 @@ fi
   # interfere with the next link command; also delete a directory that is
   # left behind by Apple's compiler.  We do this before executing the actions.
   rm -rf conftest.dSYM conftest_ipa8_conftest.oo
-  eval $as_lineno_stack; test "x$as_lineno_stack" = x && { as_lineno=; unset as_lineno;}
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
 
 } # ac_fn_fc_try_link
@@ -1957,7 +1966,7 @@ This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
 It was created by MLD2P4 $as_me 2.0, which was
-generated by GNU Autoconf 2.66.  Invocation command line was
+generated by GNU Autoconf 2.68.  Invocation command line was
 
   $ $0 $@
 
@@ -2419,7 +2428,7 @@ ac_configure="$SHELL $ac_aux_dir/configure"  # Please don't use this var.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for a BSD-compatible install" >&5
 $as_echo_n "checking for a BSD-compatible install... " >&6; }
 if test -z "$INSTALL"; then
-if test "${ac_cv_path_install+set}" = set; then :
+if ${ac_cv_path_install+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -2526,13 +2535,13 @@ ac_compile='$FC -c $FCFLAGS $ac_fcflags_srcext conftest.$ac_ext >&5'
 ac_link='$FC -o conftest$ac_exeext $FCFLAGS $LDFLAGS $ac_fcflags_srcext conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_fc_compiler_gnu
 if test -n "$ac_tool_prefix"; then
-  for ac_prog in xlf95 xlf90 xlf pgf95 pgf90 ifort ifc nagfor  gfortran
+  for ac_prog in ftn xlf95 xlf90 xlf pgf95 pgf90 ifort ifc nagfor  gfortran
   do
     # Extract the first word of "$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 $ac_word... " >&6; }
-if test "${ac_cv_prog_FC+set}" = set; then :
+if ${ac_cv_prog_FC+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$FC"; then
@@ -2570,13 +2579,13 @@ fi
 fi
 if test -z "$FC"; then
   ac_ct_FC=$FC
-  for ac_prog in xlf95 xlf90 xlf pgf95 pgf90 ifort ifc nagfor  gfortran
+  for ac_prog in ftn xlf95 xlf90 xlf pgf95 pgf90 ifort ifc nagfor  gfortran
 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 $ac_word... " >&6; }
-if test "${ac_cv_prog_ac_ct_FC+set}" = set; then :
+if ${ac_cv_prog_ac_ct_FC+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_FC"; then
@@ -2841,7 +2850,7 @@ rm -f conftest.$ac_ext conftest$ac_cv_exeext conftest.out
 ac_clean_files=$ac_clean_files_save
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
 $as_echo_n "checking for suffix of object files... " >&6; }
-if test "${ac_cv_objext+set}" = set; then :
+if ${ac_cv_objext+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.$ac_ext <<_ACEOF
@@ -2890,7 +2899,7 @@ ac_save_ext=$ac_ext
 ac_ext=F
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are using the GNU Fortran compiler" >&5
 $as_echo_n "checking whether we are using the GNU Fortran compiler... " >&6; }
-if test "${ac_cv_fc_compiler_gnu+set}" = set; then :
+if ${ac_cv_fc_compiler_gnu+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.$ac_ext <<_ACEOF
@@ -2918,7 +2927,7 @@ ac_save_FCFLAGS=$FCFLAGS
 FCFLAGS=
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $FC accepts -g" >&5
 $as_echo_n "checking whether $FC accepts -g... " >&6; }
-if test "${ac_cv_prog_fc_g+set}" = set; then :
+if ${ac_cv_prog_fc_g+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   FCFLAGS=-g
@@ -2965,13 +2974,13 @@ ac_compile='$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 "$ac_tool_prefix"; then
-  for ac_prog in xlc pgcc icc gcc
+  for ac_prog in xlc pgcc icc gcc cc
   do
     # Extract the first word of "$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 $ac_word... " >&6; }
-if test "${ac_cv_prog_CC+set}" = set; then :
+if ${ac_cv_prog_CC+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$CC"; then
@@ -3009,13 +3018,13 @@ fi
 fi
 if test -z "$CC"; then
   ac_ct_CC=$CC
-  for ac_prog in xlc pgcc icc gcc
+  for ac_prog in xlc pgcc icc gcc cc
 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 $ac_word... " >&6; }
-if test "${ac_cv_prog_ac_ct_CC+set}" = set; then :
+if ${ac_cv_prog_ac_ct_CC+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_CC"; then
@@ -3097,7 +3106,7 @@ done
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are using the GNU C compiler" >&5
 $as_echo_n "checking whether we are using the GNU C compiler... " >&6; }
-if test "${ac_cv_c_compiler_gnu+set}" = set; then :
+if ${ac_cv_c_compiler_gnu+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -3134,7 +3143,7 @@ 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 $CC accepts -g... " >&6; }
-if test "${ac_cv_prog_cc_g+set}" = set; then :
+if ${ac_cv_prog_cc_g+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_save_c_werror_flag=$ac_c_werror_flag
@@ -3212,7 +3221,7 @@ else
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $CC option to accept ISO C89" >&5
 $as_echo_n "checking for $CC option to accept ISO C89... " >&6; }
-if test "${ac_cv_prog_cc_c89+set}" = set; then :
+if ${ac_cv_prog_cc_c89+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_cv_prog_cc_c89=no
@@ -3376,7 +3385,7 @@ if test -n "$CPP" && test -d "$CPP"; then
   CPP=
 fi
 if test -z "$CPP"; then
-  if test "${ac_cv_prog_CPP+set}" = set; then :
+  if ${ac_cv_prog_CPP+:} false; then :
   $as_echo_n "(cached) " >&6
 else
       # Double quotes because CPP needs to be expanded
@@ -3406,7 +3415,7 @@ else
   # Broken: fails on valid input.
 continue
 fi
-rm -f conftest.err conftest.$ac_ext
+rm -f conftest.err conftest.i conftest.$ac_ext
 
   # OK, works on sane cases.  Now check whether nonexistent headers
   # can be detected and how.
@@ -3422,11 +3431,11 @@ else
 ac_preproc_ok=:
 break
 fi
-rm -f conftest.err conftest.$ac_ext
+rm -f conftest.err conftest.i conftest.$ac_ext
 
 done
 # Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
-rm -f conftest.err conftest.$ac_ext
+rm -f conftest.i conftest.err conftest.$ac_ext
 if $ac_preproc_ok; then :
   break
 fi
@@ -3465,7 +3474,7 @@ else
   # Broken: fails on valid input.
 continue
 fi
-rm -f conftest.err conftest.$ac_ext
+rm -f conftest.err conftest.i conftest.$ac_ext
 
   # OK, works on sane cases.  Now check whether nonexistent headers
   # can be detected and how.
@@ -3481,11 +3490,11 @@ else
 ac_preproc_ok=:
 break
 fi
-rm -f conftest.err conftest.$ac_ext
+rm -f conftest.err conftest.i conftest.$ac_ext
 
 done
 # Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
-rm -f conftest.err conftest.$ac_ext
+rm -f conftest.i conftest.err conftest.$ac_ext
 if $ac_preproc_ok; then :
 
 else
@@ -3504,7 +3513,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
 $as_echo_n "checking for grep that handles long lines and -e... " >&6; }
-if test "${ac_cv_path_GREP+set}" = set; then :
+if ${ac_cv_path_GREP+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -z "$GREP"; then
@@ -3567,7 +3576,7 @@ $as_echo "$ac_cv_path_GREP" >&6; }
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
 $as_echo_n "checking for egrep... " >&6; }
-if test "${ac_cv_path_EGREP+set}" = set; then :
+if ${ac_cv_path_EGREP+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
@@ -3634,7 +3643,7 @@ $as_echo "$ac_cv_path_EGREP" >&6; }
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ANSI C header files" >&5
 $as_echo_n "checking for ANSI C header files... " >&6; }
-if test "${ac_cv_header_stdc+set}" = set; then :
+if ${ac_cv_header_stdc+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -3795,7 +3804,7 @@ fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: umfp dir $mld2p4_cv_umfpackdir" >&5
 $as_echo "$as_me: umfp dir $mld2p4_cv_umfpackdir" >&6;}
 ac_fn_c_check_header_mongrel "$LINENO" "umfpack.h" "ac_cv_header_umfpack_h" "$ac_includes_default"
-if test "x$ac_cv_header_umfpack_h" = x""yes; then :
+if test "x$ac_cv_header_umfpack_h" = xyes; then :
   pac_umf_header_ok=yes
 else
   pac_umf_header_ok=no; UMF_INCLUDES=""
@@ -3810,7 +3819,7 @@ if test "x$pac_umf_header_ok" == "xno" ; then
  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for umfpack_di_symbolic in $UMF_INCLUDES" >&5
 $as_echo_n "checking for umfpack_di_symbolic in $UMF_INCLUDES... " >&6; }
   ac_fn_c_check_header_mongrel "$LINENO" "umfpack.h" "ac_cv_header_umfpack_h" "$ac_includes_default"
-if test "x$ac_cv_header_umfpack_h" = x""yes; then :
+if test "x$ac_cv_header_umfpack_h" = xyes; then :
   pac_umf_header_ok=yes
 else
   pac_umf_header_ok=no; UMF_INCLUDES=""
@@ -3823,7 +3832,7 @@ if test "x$pac_umf_header_ok" == "xno" ; then
    UMF_INCLUDES="-I$mld2p4_cv_umfpackdir/UFconfig -I$mld2p4_cv_umfpackdir/UMFPACK/Include -I$mld2p4_cv_umfpackdir/AMD/Include"
   CPPFLAGS="$UMF_INCLUDES $SAVE_CPPFLAGS"
    ac_fn_c_check_header_mongrel "$LINENO" "umfpack.h" "ac_cv_header_umfpack_h" "$ac_includes_default"
-if test "x$ac_cv_header_umfpack_h" = x""yes; then :
+if test "x$ac_cv_header_umfpack_h" = xyes; then :
   pac_umf_header_ok=yes
 else
   pac_umf_header_ok=no; UMF_INCLUDES=""
@@ -3982,13 +3991,13 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 if test "X$MPICC" = "X" ; then
     # This is our MPICC compiler preference: it will override ACX_MPI's first try.
-    for ac_prog in mpxlc mpcc mpicc
+    for ac_prog in mpxlc mpcc mpicc cc
 do
   # Extract the first word of "$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 $ac_word... " >&6; }
-if test "${ac_cv_prog_MPICC+set}" = set; then :
+if ${ac_cv_prog_MPICC+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$MPICC"; then
@@ -4036,7 +4045,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_MPICC+set}" = set; then :
+if ${ac_cv_prog_MPICC+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$MPICC"; then
@@ -4080,7 +4089,7 @@ test -n "$MPICC" || MPICC="$CC"
 
 if test x = x"$MPILIBS"; then
 	ac_fn_c_check_func "$LINENO" "MPI_Init" "ac_cv_func_MPI_Init"
-if test "x$ac_cv_func_MPI_Init" = x""yes; then :
+if test "x$ac_cv_func_MPI_Init" = xyes; then :
   MPILIBS=" "
 fi
 
@@ -4089,7 +4098,7 @@ fi
 if test x = x"$MPILIBS"; then
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for MPI_Init in -lmpi" >&5
 $as_echo_n "checking for MPI_Init in -lmpi... " >&6; }
-if test "${ac_cv_lib_mpi_MPI_Init+set}" = set; then :
+if ${ac_cv_lib_mpi_MPI_Init+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -4123,7 +4132,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_mpi_MPI_Init" >&5
 $as_echo "$ac_cv_lib_mpi_MPI_Init" >&6; }
-if test "x$ac_cv_lib_mpi_MPI_Init" = x""yes; then :
+if test "x$ac_cv_lib_mpi_MPI_Init" = xyes; then :
   MPILIBS="-lmpi"
 fi
 
@@ -4131,7 +4140,7 @@ fi
 if test x = x"$MPILIBS"; then
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for MPI_Init in -lmpich" >&5
 $as_echo_n "checking for MPI_Init in -lmpich... " >&6; }
-if test "${ac_cv_lib_mpich_MPI_Init+set}" = set; then :
+if ${ac_cv_lib_mpich_MPI_Init+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -4165,7 +4174,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_mpich_MPI_Init" >&5
 $as_echo "$ac_cv_lib_mpich_MPI_Init" >&6; }
-if test "x$ac_cv_lib_mpich_MPI_Init" = x""yes; then :
+if test "x$ac_cv_lib_mpich_MPI_Init" = xyes; then :
   MPILIBS="-lmpich"
 fi
 
@@ -4218,13 +4227,13 @@ ac_compiler_gnu=$ac_cv_f77_compiler_gnu
 
 if test "X$MPIF77" = "X" ; then
     # This is our MPIFC compiler preference: it will override ACX_MPI's first try.
-    for ac_prog in mpxlf mpf77 mpif77
+    for ac_prog in mpxlf mpf77 mpif77 ftn
 do
   # Extract the first word of "$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 $ac_word... " >&6; }
-if test "${ac_cv_prog_MPIF77+set}" = set; then :
+if ${ac_cv_prog_MPIF77+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$MPIF77"; then
@@ -4272,7 +4281,7 @@ if test -n "$ac_tool_prefix"; then
 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 $ac_word... " >&6; }
-if test "${ac_cv_prog_F77+set}" = set; then :
+if ${ac_cv_prog_F77+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$F77"; then
@@ -4316,7 +4325,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_ac_ct_F77+set}" = set; then :
+if ${ac_cv_prog_ac_ct_F77+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$ac_ct_F77"; then
@@ -4398,7 +4407,7 @@ ac_save_ext=$ac_ext
 ac_ext=F
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether we are using the GNU Fortran 77 compiler" >&5
 $as_echo_n "checking whether we are using the GNU Fortran 77 compiler... " >&6; }
-if test "${ac_cv_f77_compiler_gnu+set}" = set; then :
+if ${ac_cv_f77_compiler_gnu+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat > conftest.$ac_ext <<_ACEOF
@@ -4426,7 +4435,7 @@ ac_save_FFLAGS=$FFLAGS
 FFLAGS=
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $F77 accepts -g" >&5
 $as_echo_n "checking whether $F77 accepts -g... " >&6; }
-if test "${ac_cv_prog_f77_g+set}" = set; then :
+if ${ac_cv_prog_f77_g+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   FFLAGS=-g
@@ -4483,7 +4492,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_MPIF77+set}" = set; then :
+if ${ac_cv_prog_MPIF77+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$MPIF77"; then
@@ -4548,7 +4557,7 @@ fi
 	if test x = x"$MPILIBS"; then
 		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for MPI_Init in -lfmpi" >&5
 $as_echo_n "checking for MPI_Init in -lfmpi... " >&6; }
-if test "${ac_cv_lib_fmpi_MPI_Init+set}" = set; then :
+if ${ac_cv_lib_fmpi_MPI_Init+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -4569,7 +4578,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_fmpi_MPI_Init" >&5
 $as_echo "$ac_cv_lib_fmpi_MPI_Init" >&6; }
-if test "x$ac_cv_lib_fmpi_MPI_Init" = x""yes; then :
+if test "x$ac_cv_lib_fmpi_MPI_Init" = xyes; then :
   MPILIBS="-lfmpi"
 fi
 
@@ -4577,7 +4586,7 @@ fi
 	if test x = x"$MPILIBS"; then
 		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for MPI_Init in -lfmpich" >&5
 $as_echo_n "checking for MPI_Init in -lfmpich... " >&6; }
-if test "${ac_cv_lib_fmpich_MPI_Init+set}" = set; then :
+if ${ac_cv_lib_fmpich_MPI_Init+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -4598,7 +4607,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_fmpich_MPI_Init" >&5
 $as_echo "$ac_cv_lib_fmpich_MPI_Init" >&6; }
-if test "x$ac_cv_lib_fmpich_MPI_Init" = x""yes; then :
+if test "x$ac_cv_lib_fmpich_MPI_Init" = xyes; then :
   MPILIBS="-lfmpich"
 fi
 
@@ -4607,7 +4616,7 @@ fi
 if test x = x"$MPILIBS"; then
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for MPI_Init in -lmpi" >&5
 $as_echo_n "checking for MPI_Init in -lmpi... " >&6; }
-if test "${ac_cv_lib_mpi_MPI_Init+set}" = set; then :
+if ${ac_cv_lib_mpi_MPI_Init+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -4628,7 +4637,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_mpi_MPI_Init" >&5
 $as_echo "$ac_cv_lib_mpi_MPI_Init" >&6; }
-if test "x$ac_cv_lib_mpi_MPI_Init" = x""yes; then :
+if test "x$ac_cv_lib_mpi_MPI_Init" = xyes; then :
   MPILIBS="-lmpi"
 fi
 
@@ -4636,7 +4645,7 @@ fi
 if test x = x"$MPILIBS"; then
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for MPI_Init in -lmpich" >&5
 $as_echo_n "checking for MPI_Init in -lmpich... " >&6; }
-if test "${ac_cv_lib_mpich_MPI_Init+set}" = set; then :
+if ${ac_cv_lib_mpich_MPI_Init+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -4657,7 +4666,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_mpich_MPI_Init" >&5
 $as_echo "$ac_cv_lib_mpich_MPI_Init" >&6; }
-if test "x$ac_cv_lib_mpich_MPI_Init" = x""yes; then :
+if test "x$ac_cv_lib_mpich_MPI_Init" = xyes; then :
   MPILIBS="-lmpich"
 fi
 
@@ -4706,13 +4715,13 @@ ac_compiler_gnu=$ac_cv_fc_compiler_gnu
 
 if test "X$MPIFC" = "X" ; then
     # This is our MPIFC compiler preference: it will override ACX_MPI's first try.
-    for ac_prog in mpxlf95 mpxlf90 mpf95 mpf90  mpif95 mpif90
+    for ac_prog in mpxlf95 mpxlf90 mpf95 mpf90  mpif95 mpif90  ftn
 do
   # Extract the first word of "$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 $ac_word... " >&6; }
-if test "${ac_cv_prog_MPIFC+set}" = set; then :
+if ${ac_cv_prog_MPIFC+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$MPIFC"; then
@@ -4762,7 +4771,7 @@ do
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if test "${ac_cv_prog_MPIFC+set}" = set; then :
+if ${ac_cv_prog_MPIFC+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   if test -n "$MPIFC"; then
@@ -4827,7 +4836,7 @@ fi
 	if test x = x"$MPILIBS"; then
 		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for MPI_Init in -lfmpi" >&5
 $as_echo_n "checking for MPI_Init in -lfmpi... " >&6; }
-if test "${ac_cv_lib_fmpi_MPI_Init+set}" = set; then :
+if ${ac_cv_lib_fmpi_MPI_Init+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -4848,7 +4857,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_fmpi_MPI_Init" >&5
 $as_echo "$ac_cv_lib_fmpi_MPI_Init" >&6; }
-if test "x$ac_cv_lib_fmpi_MPI_Init" = x""yes; then :
+if test "x$ac_cv_lib_fmpi_MPI_Init" = xyes; then :
   MPILIBS="-lfmpi"
 fi
 
@@ -4856,7 +4865,7 @@ fi
 	if test x = x"$MPILIBS"; then
 		{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for MPI_Init in -lmpichf90" >&5
 $as_echo_n "checking for MPI_Init in -lmpichf90... " >&6; }
-if test "${ac_cv_lib_mpichf90_MPI_Init+set}" = set; then :
+if ${ac_cv_lib_mpichf90_MPI_Init+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -4877,7 +4886,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_mpichf90_MPI_Init" >&5
 $as_echo "$ac_cv_lib_mpichf90_MPI_Init" >&6; }
-if test "x$ac_cv_lib_mpichf90_MPI_Init" = x""yes; then :
+if test "x$ac_cv_lib_mpichf90_MPI_Init" = xyes; then :
   MPILIBS="-lmpichf90"
 fi
 
@@ -4886,7 +4895,7 @@ fi
 if test x = x"$MPILIBS"; then
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for MPI_Init in -lmpi" >&5
 $as_echo_n "checking for MPI_Init in -lmpi... " >&6; }
-if test "${ac_cv_lib_mpi_MPI_Init+set}" = set; then :
+if ${ac_cv_lib_mpi_MPI_Init+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -4907,7 +4916,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_mpi_MPI_Init" >&5
 $as_echo "$ac_cv_lib_mpi_MPI_Init" >&6; }
-if test "x$ac_cv_lib_mpi_MPI_Init" = x""yes; then :
+if test "x$ac_cv_lib_mpi_MPI_Init" = xyes; then :
   MPILIBS="-lmpi"
 fi
 
@@ -4915,7 +4924,7 @@ fi
 if test x = x"$MPILIBS"; then
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for MPI_Init in -lmpich" >&5
 $as_echo_n "checking for MPI_Init in -lmpich... " >&6; }
-if test "${ac_cv_lib_mpich_MPI_Init+set}" = set; then :
+if ${ac_cv_lib_mpich_MPI_Init+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
@@ -4936,7 +4945,7 @@ LIBS=$ac_check_lib_save_LIBS
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_mpich_MPI_Init" >&5
 $as_echo "$ac_cv_lib_mpich_MPI_Init" >&6; }
-if test "x$ac_cv_lib_mpich_MPI_Init" = x""yes; then :
+if test "x$ac_cv_lib_mpich_MPI_Init" = xyes; then :
   MPILIBS="-lmpich"
 fi
 
@@ -5019,7 +5028,7 @@ CPPFLAGS="$SLU_INCLUDES $CPPFLAGS"
 { $as_echo "$as_me:${as_lineno-$LINENO}: slu dir $mld2p4_cv_superludir" >&5
 $as_echo "$as_me: slu dir $mld2p4_cv_superludir" >&6;}
 ac_fn_c_check_header_mongrel "$LINENO" "slu_ddefs.h" "ac_cv_header_slu_ddefs_h" "$ac_includes_default"
-if test "x$ac_cv_header_slu_ddefs_h" = x""yes; then :
+if test "x$ac_cv_header_slu_ddefs_h" = xyes; then :
   pac_slu_header_ok=yes
 else
   pac_slu_header_ok=no; SLU_INCLUDES=""
@@ -5032,7 +5041,7 @@ if test "x$pac_slu_header_ok" == "xno" ; then
   CPPFLAGS="$SLU_INCLUDES $SAVE_CPPFLAGS"
 
  ac_fn_c_check_header_mongrel "$LINENO" "slu_ddefs.h" "ac_cv_header_slu_ddefs_h" "$ac_includes_default"
-if test "x$ac_cv_header_slu_ddefs_h" = x""yes; then :
+if test "x$ac_cv_header_slu_ddefs_h" = xyes; then :
   pac_slu_header_ok=yes
 else
   pac_slu_header_ok=no; SLU_INCLUDES=""
@@ -5149,7 +5158,7 @@ CPPFLAGS="$SLUDIST_INCLUDES $CPPFLAGS"
 { $as_echo "$as_me:${as_lineno-$LINENO}: sludist dir $mld2p4_cv_superludistdir" >&5
 $as_echo "$as_me: sludist dir $mld2p4_cv_superludistdir" >&6;}
 ac_fn_c_check_header_mongrel "$LINENO" "superlu_ddefs.h" "ac_cv_header_superlu_ddefs_h" "$ac_includes_default"
-if test "x$ac_cv_header_superlu_ddefs_h" = x""yes; then :
+if test "x$ac_cv_header_superlu_ddefs_h" = xyes; then :
   pac_sludist_header_ok=yes
 else
   pac_sludist_header_ok=no; SLUDIST_INCLUDES=""
@@ -5162,7 +5171,7 @@ if test "x$pac_sludist_header_ok" == "xno" ; then
   CPPFLAGS="$SLUDIST_INCLUDES $SAVE_CPPFLAGS"
 
  ac_fn_c_check_header_mongrel "$LINENO" "superlu_ddefs.h" "ac_cv_header_superlu_ddefs_h" "$ac_includes_default"
-if test "x$ac_cv_header_superlu_ddefs_h" = x""yes; then :
+if test "x$ac_cv_header_superlu_ddefs_h" = xyes; then :
   pac_sludist_header_ok=yes
 else
   pac_sludist_header_ok=no; SLUDIST_INCLUDES=""
@@ -5253,7 +5262,7 @@ fi
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking fortran 90 modules inclusion flag" >&5
 $as_echo_n "checking fortran 90 modules inclusion flag... " >&6; }
-if test "${ax_f90_modflag+set}" = set; then :
+if ${ax_f90_modflag+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_ext=${ac_fc_srcext-f}
@@ -5463,10 +5472,21 @@ $as_echo "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;} ;;
      :end' >>confcache
 if diff "$cache_file" confcache >/dev/null 2>&1; then :; else
   if test -w "$cache_file"; then
-    test "x$cache_file" != "x/dev/null" &&
+    if test "x$cache_file" != "x/dev/null"; then
       { $as_echo "$as_me:${as_lineno-$LINENO}: updating cache $cache_file" >&5
 $as_echo "$as_me: updating cache $cache_file" >&6;}
-    cat confcache >$cache_file
+      if test ! -f "$cache_file" || test -h "$cache_file"; then
+	cat confcache >"$cache_file"
+      else
+        case $cache_file in #(
+        */* | ?:*)
+	  mv -f confcache "$cache_file"$$ &&
+	  mv -f "$cache_file"$$ "$cache_file" ;; #(
+        *)
+	  mv -f confcache "$cache_file" ;;
+	esac
+      fi
+    fi
   else
     { $as_echo "$as_me:${as_lineno-$LINENO}: not updating unwritable cache $cache_file" >&5
 $as_echo "$as_me: not updating unwritable cache $cache_file" >&6;}
@@ -5534,7 +5554,7 @@ LTLIBOBJS=$ac_ltlibobjs
 
 
 
-: ${CONFIG_STATUS=./config.status}
+: "${CONFIG_STATUS=./config.status}"
 ac_write_fail=0
 ac_clean_files_save=$ac_clean_files
 ac_clean_files="$ac_clean_files $CONFIG_STATUS"
@@ -5635,6 +5655,7 @@ fi
 IFS=" ""	$as_nl"
 
 # Find who we are.  Look in the path if we contain no directory separator.
+as_myself=
 case $0 in #((
   *[\\/]* ) as_myself=$0 ;;
   *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -5942,7 +5963,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # values after options handling.
 ac_log="
 This file was extended by MLD2P4 $as_me 2.0, which was
-generated by GNU Autoconf 2.66.  Invocation command line was
+generated by GNU Autoconf 2.68.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
   CONFIG_HEADERS  = $CONFIG_HEADERS
@@ -5995,7 +6016,7 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
 MLD2P4 config.status 2.0
-configured by $0, generated by GNU Autoconf 2.66,
+configured by $0, generated by GNU Autoconf 2.68,
   with options \\"\$ac_cs_config\\"
 
 Copyright (C) 2010 Free Software Foundation, Inc.
@@ -6014,11 +6035,16 @@ ac_need_defaults=:
 while test $# != 0
 do
   case $1 in
-  --*=*)
+  --*=?*)
     ac_option=`expr "X$1" : 'X\([^=]*\)='`
     ac_optarg=`expr "X$1" : 'X[^=]*=\(.*\)'`
     ac_shift=:
     ;;
+  --*=)
+    ac_option=`expr "X$1" : 'X\([^=]*\)='`
+    ac_optarg=
+    ac_shift=:
+    ;;
   *)
     ac_option=$1
     ac_optarg=$2
@@ -6040,6 +6066,7 @@ do
     $ac_shift
     case $ac_optarg in
     *\'*) ac_optarg=`$as_echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    '') as_fn_error $? "missing file argument" ;;
     esac
     as_fn_append CONFIG_FILES " '$ac_optarg'"
     ac_need_defaults=false;;
@@ -6122,9 +6149,10 @@ fi
 # after its creation but before its name has been assigned to `$tmp'.
 $debug ||
 {
-  tmp=
+  tmp= ac_tmp=
   trap 'exit_status=$?
-  { test -z "$tmp" || test ! -d "$tmp" || rm -fr "$tmp"; } && exit $exit_status
+  : "${ac_tmp:=$tmp}"
+  { test ! -d "$ac_tmp" || rm -fr "$ac_tmp"; } && exit $exit_status
 ' 0
   trap 'as_fn_exit 1' 1 2 13 15
 }
@@ -6132,12 +6160,13 @@ $debug ||
 
 {
   tmp=`(umask 077 && mktemp -d "./confXXXXXX") 2>/dev/null` &&
-  test -n "$tmp" && test -d "$tmp"
+  test -d "$tmp"
 }  ||
 {
   tmp=./conf$$-$RANDOM
   (umask 077 && mkdir "$tmp")
 } || as_fn_error $? "cannot create a temporary directory in ." "$LINENO" 5
+ac_tmp=$tmp
 
 # Set up the scripts for CONFIG_FILES section.
 # No need to generate them if there are no CONFIG_FILES.
@@ -6159,7 +6188,7 @@ else
   ac_cs_awk_cr=$ac_cr
 fi
 
-echo 'BEGIN {' >"$tmp/subs1.awk" &&
+echo 'BEGIN {' >"$ac_tmp/subs1.awk" &&
 _ACEOF
 
 
@@ -6187,7 +6216,7 @@ done
 rm -f conf$$subs.sh
 
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
-cat >>"\$tmp/subs1.awk" <<\\_ACAWK &&
+cat >>"\$ac_tmp/subs1.awk" <<\\_ACAWK &&
 _ACEOF
 sed -n '
 h
@@ -6235,7 +6264,7 @@ t delim
 rm -f conf$$subs.awk
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 _ACAWK
-cat >>"\$tmp/subs1.awk" <<_ACAWK &&
+cat >>"\$ac_tmp/subs1.awk" <<_ACAWK &&
   for (key in S) S_is_set[key] = 1
   FS = ""
 
@@ -6267,7 +6296,7 @@ if sed "s/$ac_cr//" < /dev/null > /dev/null 2>&1; then
   sed "s/$ac_cr\$//; s/$ac_cr/$ac_cs_awk_cr/g"
 else
   cat
-fi < "$tmp/subs1.awk" > "$tmp/subs.awk" \
+fi < "$ac_tmp/subs1.awk" > "$ac_tmp/subs.awk" \
   || as_fn_error $? "could not setup config files machinery" "$LINENO" 5
 _ACEOF
 
@@ -6326,7 +6355,7 @@ do
     for ac_f
     do
       case $ac_f in
-      -) ac_f="$tmp/stdin";;
+      -) ac_f="$ac_tmp/stdin";;
       *) # Look for the file first in the build tree, then in the source tree
 	 # (if the path is not absolute).  The absolute path cannot be DOS-style,
 	 # because $ac_f cannot contain `:'.
@@ -6361,7 +6390,7 @@ $as_echo "$as_me: creating $ac_file" >&6;}
     esac
 
     case $ac_tag in
-    *:-:* | *:-) cat >"$tmp/stdin" \
+    *:-:* | *:-) cat >"$ac_tmp/stdin" \
       || as_fn_error $? "could not create $ac_file" "$LINENO" 5 ;;
     esac
     ;;
@@ -6492,21 +6521,22 @@ s&@abs_top_builddir@&$ac_abs_top_builddir&;t t
 s&@INSTALL@&$ac_INSTALL&;t t
 $ac_datarootdir_hack
 "
-eval sed \"\$ac_sed_extra\" "$ac_file_inputs" | $AWK -f "$tmp/subs.awk" >$tmp/out \
-  || as_fn_error $? "could not create $ac_file" "$LINENO" 5
+eval sed \"\$ac_sed_extra\" "$ac_file_inputs" | $AWK -f "$ac_tmp/subs.awk" \
+  >$ac_tmp/out || as_fn_error $? "could not create $ac_file" "$LINENO" 5
 
 test -z "$ac_datarootdir_hack$ac_datarootdir_seen" &&
-  { ac_out=`sed -n '/\${datarootdir}/p' "$tmp/out"`; test -n "$ac_out"; } &&
-  { ac_out=`sed -n '/^[	 ]*datarootdir[	 ]*:*=/p' "$tmp/out"`; test -z "$ac_out"; } &&
+  { ac_out=`sed -n '/\${datarootdir}/p' "$ac_tmp/out"`; test -n "$ac_out"; } &&
+  { ac_out=`sed -n '/^[	 ]*datarootdir[	 ]*:*=/p' \
+      "$ac_tmp/out"`; test -z "$ac_out"; } &&
   { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable \`datarootdir'
 which seems to be undefined.  Please make sure it is defined" >&5
 $as_echo "$as_me: WARNING: $ac_file contains a reference to the variable \`datarootdir'
 which seems to be undefined.  Please make sure it is defined" >&2;}
 
-  rm -f "$tmp/stdin"
+  rm -f "$ac_tmp/stdin"
   case $ac_file in
-  -) cat "$tmp/out" && rm -f "$tmp/out";;
-  *) rm -f "$ac_file" && mv "$tmp/out" "$ac_file";;
+  -) cat "$ac_tmp/out" && rm -f "$ac_tmp/out";;
+  *) rm -f "$ac_file" && mv "$ac_tmp/out" "$ac_file";;
   esac \
   || as_fn_error $? "could not create $ac_file" "$LINENO" 5
  ;;
diff --git a/configure.ac b/configure.ac
index 6f77de1c..c1c7816b 100755
--- a/configure.ac
+++ b/configure.ac
@@ -115,8 +115,8 @@ AC_MSG_RESULT([$INSTALL_DIR $INSTALL_INCLUDEDIR $INSTALL_LIBDIR $INSTALL_DOCSDIR
 # Compilers detection: FC,F77,CC should be set, if found.
 ###############################################################################
 
-AC_PROG_FC([xlf95 xlf90 xlf pgf95 pgf90 ifort ifc nagfor  gfortran])
-AC_PROG_CC([xlc pgcc icc gcc ])
+AC_PROG_FC([ftn xlf95 xlf90 xlf pgf95 pgf90 ifort ifc nagfor  gfortran])
+AC_PROG_CC([xlc pgcc icc gcc cc])
 dnl AC_PROG_CXX
 
 if test "X$CC" == "X" ; then
@@ -188,13 +188,13 @@ else
 AC_LANG([C])
 if test "X$MPICC" = "X" ; then
     # This is our MPICC compiler preference: it will override ACX_MPI's first try.
-    AC_CHECK_PROGS([MPICC],[mpxlc mpcc mpicc])
+    AC_CHECK_PROGS([MPICC],[mpxlc mpcc mpicc cc])
 fi
 ACX_MPI([], [AC_MSG_ERROR([[Cannot find any suitable MPI implementation for C]])])
 AC_LANG(Fortran 77)
 if test "X$MPIF77" = "X" ; then
     # This is our MPIFC compiler preference: it will override ACX_MPI's first try.
-    AC_CHECK_PROGS([MPIF77],[mpxlf mpf77 mpif77])
+    AC_CHECK_PROGS([MPIF77],[mpxlf mpf77 mpif77 ftn])
 fi
 ACX_MPI([], [AC_MSG_ERROR([[Cannot find any suitable MPI implementation for Fortran 77]])])
 
@@ -202,7 +202,7 @@ AC_LANG([Fortran])
 
 if test "X$MPIFC" = "X" ; then
     # This is our MPIFC compiler preference: it will override ACX_MPI's first try.
-    AC_CHECK_PROGS([MPIFC],[mpxlf95 mpxlf90 mpf95 mpf90  mpif95 mpif90  ])
+    AC_CHECK_PROGS([MPIFC],[mpxlf95 mpxlf90 mpf95 mpf90  mpif95 mpif90  ftn])
 fi
 
 ACX_MPI([], [AC_MSG_ERROR([[Cannot find any suitable MPI implementation for Fortran]])])