diff --git a/configure b/configure
index 5ccf5a74..69e1184c 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.61 for PSBLAS 0.0.
+# Generated by GNU Autoconf 2.61 for PSBLAS 2.2.
 #
 # Report bugs to <salvatore.filippone@uniroma2.it>.
 #
@@ -574,8 +574,8 @@ SHELL=${CONFIG_SHELL-/bin/sh}
 # Identity of this package.
 PACKAGE_NAME='PSBLAS'
 PACKAGE_TARNAME='psblas'
-PACKAGE_VERSION='0.0'
-PACKAGE_STRING='PSBLAS 0.0'
+PACKAGE_VERSION='2.2'
+PACKAGE_STRING='PSBLAS 2.2'
 PACKAGE_BUGREPORT='salvatore.filippone@uniroma2.it'
 
 ac_unique_file="base/modules/psb_base_mod.f90"
@@ -1253,7 +1253,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures PSBLAS 0.0 to adapt to many kinds of systems.
+\`configure' configures PSBLAS 2.2 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1319,7 +1319,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of PSBLAS 0.0:";;
+     short | recursive ) echo "Configuration of PSBLAS 2.2:";;
    esac
   cat <<\_ACEOF
 
@@ -1438,7 +1438,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-PSBLAS configure 0.0
+PSBLAS configure 2.2
 generated by GNU Autoconf 2.61
 
 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
@@ -1452,7 +1452,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by PSBLAS $as_me 0.0, which was
+It was created by PSBLAS $as_me 2.2, which was
 generated by GNU Autoconf 2.61.  Invocation command line was
 
   $ $0 $@
@@ -5006,7 +5006,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='psblas'
- VERSION='0.0'
+ VERSION='2.2'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -6764,57 +6764,65 @@ if test "X$CFLAGS" == "X" ; then
  # note that no space should be placed around the equality symbol in assignations
  # Note : 'native' is valid _only_ on GCC/x86  (32/64 bits)
    CCOPT="-O3  $CCOPT"
- else
-  if test "X$psblas_cv_fc" == X"xlf" ; then
+ elif test "X$psblas_cv_fc" == X"xlf" ; then
    # XL compiler : consider using -qarch=auto
-     CCOPT="-O3 $CCOPT"
-   else
+     CCOPT="-O3 -qarch=auto $CCOPT"
+ elif test "X$psblas_cv_fc" == X"pg" ; then
    # other compilers ..
-     CCOPT="-O3 $CCOPT"
+     CCOPT="-fast $CCOPT"
+  # NOTE : PG & Sun use -fast instead -O3
+ elif test "X$psblas_cv_fc" == X"sun" ; then
+   # other compilers ..
+     CCOPT="-fast $CCOPT"
   # NOTE : PG & Sun use -fast instead -O3
-  fi
- fi
  else
+     CCOPT="-fast $CCOPT"
+ fi
+else
  CCOPT="${CFLAGS}"
 fi
- CFLAGS="${CCOPT}"
+CFLAGS="${CCOPT}"
 
 if test "X$FFLAGS" == "X" ; then
  if test "X$psblas_cv_fc" == "Xgcc" ; then
  # note that no space should be placed around the equality symbol in assignations
  # Note : 'native' is valid _only_ on GCC/x86  (32/64 bits)
    FCOPT="-O3  $FCOPT"
- else
-  if test "X$psblas_cv_fc" == X"xlf" ; then
+ elif test "X$psblas_cv_fc" == X"xlf" ; then
    # XL compiler : consider using -qarch=auto
-     FCOPT="-O3 $FCOPT"
-   else
+     FCOPT="-O3 -qarch=auto $FCOPT"
+ elif test "X$psblas_cv_fc" == X"pg" ; then
    # other compilers ..
-     FCOPT="-O3 $FCOPT"
+     FCOPT="-fast $FCOPT"
+  # NOTE : PG & Sun use -fast instead -O3
+ elif test "X$psblas_cv_fc" == X"sun" ; then
+   # other compilers ..
+     FCOPT="-fast $FCOPT"
   # NOTE : PG & Sun use -fast instead -O3
-  fi
- fi
  else
+     FCOPT="-fast $FCOPT"
+ fi
+else
  FCOPT="${FFLAGS}"
 fi
- FFLAGS="${FCOPT}"
+FFLAGS="${FCOPT}"
 
 if test "X$FCFLAGS" == "X" ; then
  if test "X$psblas_cv_fc" == "Xgcc" ; then
  # note that no space should be placed around the equality symbol in assignations
  # Note : 'native' is valid _only_ on GCC/x86  (32/64 bits)
- F90COPT="-O3  $F90COPT"
- else
-  if test "X$psblas_cv_fc" == X"xlf" ; then
+   F90COPT="-O3  $F90COPT"
+ elif test "X$psblas_cv_fc" == X"xlf" ; then
    # XL compiler : consider using -qarch=auto
-   F90COPT="-O3 $F90COPT"
-   else
+     F90COPT="-O3 -qarch=auto $F90COPT"
+ elif test "X$psblas_cv_fc" == X"pgf77" ; then
    # other compilers ..
-   F90COPT="-O3 $F90COPT"
+     F90COPT="-fast $F90COPT"
   # NOTE : PG & Sun use -fast instead -O3
-  fi
- fi
  else
+     F90COPT="-fast $F90COPT"
+ fi
+else
  F90COPT="${FCFLAGS}"
 fi
 FCFLAGS="${F90COPT}"
@@ -10696,7 +10704,7 @@ exec 6>&1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by PSBLAS $as_me 0.0, which was
+This file was extended by PSBLAS $as_me 2.2, which was
 generated by GNU Autoconf 2.61.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -10743,7 +10751,7 @@ Report bugs to <bug-autoconf@gnu.org>."
 _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF
 ac_cs_version="\\
-PSBLAS config.status 0.0
+PSBLAS config.status 2.2
 configured by $0, generated by GNU Autoconf 2.61,
   with options \\"`echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`\\"
 
diff --git a/configure.ac b/configure.ac
index 7ab81ed5..6945d174 100755
--- a/configure.ac
+++ b/configure.ac
@@ -17,8 +17,7 @@ dnl then  : ./configure VAR=VAL
 dnl then  : ./configure --help=short
 dnl then  : ./configure --help
 
-dnl OPEN QUESTIONS: 
-dnl To detect an installed instance of PSBLAS in order for MLD2P4 to be installed: the PSBLAS modules get this task difficult to accomplish!
+dnl the PSBLAS modules get this task difficult to accomplish!
 dnl SEE  : --module-path --include-path
 
 dnl NOTE : There is no cross compilation support.
@@ -39,7 +38,7 @@ dnl NOTE : odd configurations like ifc + gcc still await in the mist of the unkn
 ###############################################################################
 
 # NOTE: the literal for version (the second argument to AC_INIT should be a literal!)
-AC_INIT([PSBLAS],0.0, salvatore.filippone@uniroma2.it)
+AC_INIT([PSBLAS],2.2, salvatore.filippone@uniroma2.it)
 
 # VERSION is the file containing the PSBLAS version code
 # FIXME
@@ -310,58 +309,66 @@ dnl if true ; then
  if test "X$psblas_cv_fc" == "Xgcc" ; then
  # note that no space should be placed around the equality symbol in assignations
  # Note : 'native' is valid _only_ on GCC/x86  (32/64 bits)
-   CCOPT="-O3  $CCOPT" 
- else
-  if test "X$psblas_cv_fc" == X"xlf" ; then
+   CCOPT="-O3  $CCOPT"
+ elif test "X$psblas_cv_fc" == X"xlf" ; then
    # XL compiler : consider using -qarch=auto
-     CCOPT="-O3 $CCOPT"
-   else
+     CCOPT="-O3 -qarch=auto $CCOPT"
+ elif test "X$psblas_cv_fc" == X"pg" ; then
    # other compilers ..
-     CCOPT="-O3 $CCOPT"
+     CCOPT="-fast $CCOPT"
   # NOTE : PG & Sun use -fast instead -O3
-  fi
+ elif test "X$psblas_cv_fc" == X"sun" ; then
+   # other compilers ..
+     CCOPT="-fast $CCOPT"
+  # NOTE : PG & Sun use -fast instead -O3
+ else 
+     CCOPT="-fast $CCOPT"
  fi
- else
+else
  CCOPT="${CFLAGS}"
 fi
- CFLAGS="${CCOPT}"
+CFLAGS="${CCOPT}"
 
 if test "X$FFLAGS" == "X" ; then
  if test "X$psblas_cv_fc" == "Xgcc" ; then
  # note that no space should be placed around the equality symbol in assignations
  # Note : 'native' is valid _only_ on GCC/x86  (32/64 bits)
    FCOPT="-O3  $FCOPT"
- else
-  if test "X$psblas_cv_fc" == X"xlf" ; then
+ elif test "X$psblas_cv_fc" == X"xlf" ; then
    # XL compiler : consider using -qarch=auto
-     FCOPT="-O3 $FCOPT"
-   else
+     FCOPT="-O3 -qarch=auto $FCOPT"
+ elif test "X$psblas_cv_fc" == X"pg" ; then
    # other compilers ..
-     FCOPT="-O3 $FCOPT"
+     FCOPT="-fast $FCOPT"
   # NOTE : PG & Sun use -fast instead -O3
-  fi
+ elif test "X$psblas_cv_fc" == X"sun" ; then
+   # other compilers ..
+     FCOPT="-fast $FCOPT"
+  # NOTE : PG & Sun use -fast instead -O3
+ else 
+     FCOPT="-fast $FCOPT"
  fi
- else
+else
  FCOPT="${FFLAGS}"
 fi
- FFLAGS="${FCOPT}"
+FFLAGS="${FCOPT}"
 
 if test "X$FCFLAGS" == "X" ; then
  if test "X$psblas_cv_fc" == "Xgcc" ; then
  # note that no space should be placed around the equality symbol in assignations
  # Note : 'native' is valid _only_ on GCC/x86  (32/64 bits)
- F90COPT="-O3  $F90COPT"
- else
-  if test "X$psblas_cv_fc" == X"xlf" ; then
+   F90COPT="-O3  $F90COPT"
+ elif test "X$psblas_cv_fc" == X"xlf" ; then
    # XL compiler : consider using -qarch=auto
-   F90COPT="-O3 $F90COPT"
-   else
+     F90COPT="-O3 -qarch=auto $F90COPT"
+ elif test "X$psblas_cv_fc" == X"pgf77" ; then
    # other compilers ..
-   F90COPT="-O3 $F90COPT"
+     F90COPT="-fast $F90COPT"
   # NOTE : PG & Sun use -fast instead -O3
-  fi
+ else 
+     F90COPT="-fast $F90COPT"
  fi
- else
+else
  F90COPT="${FCFLAGS}"
 fi
 FCFLAGS="${F90COPT}"