diff --git a/m4/ax_blas.m4 b/m4/ax_blas.m4
new file mode 100644
index 0000000000000000000000000000000000000000..87e7ae039365ba6b667f845c38a3f8af1e24539c
--- /dev/null
+++ b/m4/ax_blas.m4
@@ -0,0 +1,239 @@
+# ===========================================================================
+#          http://www.gnu.org/software/autoconf-archive/ax_blas.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_BLAS([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
+#
+# DESCRIPTION
+#
+#   This macro looks for a library that implements the BLAS linear-algebra
+#   interface (see http://www.netlib.org/blas/). On success, it sets the
+#   BLAS_LIBS output variable to hold the requisite library linkages.
+#
+#   To link with BLAS, you should link with:
+#
+#     $BLAS_LIBS $LIBS $FLIBS
+#
+#   in that order. FLIBS is the output variable of the
+#   AC_F77_LIBRARY_LDFLAGS macro (called if necessary by AX_BLAS), and is
+#   sometimes necessary in order to link with F77 libraries. Users will also
+#   need to use AC_F77_DUMMY_MAIN (see the autoconf manual), for the same
+#   reason.
+#
+#   Many libraries are searched for, from ATLAS to CXML to ESSL. The user
+#   may also use --with-blas=<lib> in order to use some specific BLAS
+#   library <lib>. In order to link successfully, however, be aware that you
+#   will probably need to use the same Fortran compiler (which can be set
+#   via the F77 env. var.) as was used to compile the BLAS library.
+#
+#   ACTION-IF-FOUND is a list of shell commands to run if a BLAS library is
+#   found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it is
+#   not found. If ACTION-IF-FOUND is not specified, the default action will
+#   define HAVE_BLAS.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
+#
+#   This program is free software: you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation, either version 3 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 14
+
+AU_ALIAS([ACX_BLAS], [AX_BLAS])
+AC_DEFUN([AX_BLAS], [
+AC_PREREQ(2.50)
+AC_REQUIRE([AC_F77_LIBRARY_LDFLAGS])
+AC_REQUIRE([AC_CANONICAL_HOST])
+ax_blas_ok=no
+
+AC_ARG_WITH(blas,
+	[AS_HELP_STRING([--with-blas=<lib>], [use BLAS library <lib>])])
+case $with_blas in
+	yes | "") ;;
+	no) ax_blas_ok=disable ;;
+	-* | */* | *.a | *.so | *.so.* | *.o) BLAS_LIBS="$with_blas" ;;
+	*) BLAS_LIBS="-l$with_blas" ;;
+esac
+
+# Get fortran linker names of BLAS functions to check for.
+AC_F77_FUNC(sgemm)
+AC_F77_FUNC(dgemm)
+
+ax_blas_save_LIBS="$LIBS"
+LIBS="$LIBS $FLIBS"
+
+# First, check BLAS_LIBS environment variable
+if test $ax_blas_ok = no; then
+if test "x$BLAS_LIBS" != x; then
+	save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS"
+	AC_MSG_CHECKING([for $sgemm in $BLAS_LIBS])
+	AC_TRY_LINK_FUNC($sgemm, [ax_blas_ok=yes], [BLAS_LIBS=""])
+	AC_MSG_RESULT($ax_blas_ok)
+	LIBS="$save_LIBS"
+fi
+fi
+
+# BLAS linked to by default?  (happens on some supercomputers)
+if test $ax_blas_ok = no; then
+	save_LIBS="$LIBS"; LIBS="$LIBS"
+	AC_MSG_CHECKING([if $sgemm is being linked in already])
+	AC_TRY_LINK_FUNC($sgemm, [ax_blas_ok=yes])
+	AC_MSG_RESULT($ax_blas_ok)
+	LIBS="$save_LIBS"
+fi
+
+# BLAS in OpenBLAS library? (http://xianyi.github.com/OpenBLAS/)
+if test $ax_blas_ok = no; then
+	AC_CHECK_LIB(openblas, $sgemm, [ax_blas_ok=yes
+			                BLAS_LIBS="-lopenblas"])
+fi
+
+# BLAS in ATLAS library? (http://math-atlas.sourceforge.net/)
+if test $ax_blas_ok = no; then
+	AC_CHECK_LIB(atlas, ATL_xerbla,
+		[AC_CHECK_LIB(f77blas, $sgemm,
+		[AC_CHECK_LIB(cblas, cblas_dgemm,
+			[ax_blas_ok=yes
+			 BLAS_LIBS="-lcblas -lf77blas -latlas"],
+			[], [-lf77blas -latlas])],
+			[], [-latlas])])
+fi
+
+# BLAS in PhiPACK libraries? (requires generic BLAS lib, too)
+if test $ax_blas_ok = no; then
+	AC_CHECK_LIB(blas, $sgemm,
+		[AC_CHECK_LIB(dgemm, $dgemm,
+		[AC_CHECK_LIB(sgemm, $sgemm,
+			[ax_blas_ok=yes; BLAS_LIBS="-lsgemm -ldgemm -lblas"],
+			[], [-lblas])],
+			[], [-lblas])])
+fi
+
+# BLAS in Intel MKL library?
+if test $ax_blas_ok = no; then
+	# MKL for gfortran
+	if test x"$ac_cv_fc_compiler_gnu" = xyes; then
+		# 64 bit
+		if test $host_cpu = x86_64; then
+			AC_CHECK_LIB(mkl_gf_lp64, $sgemm,
+			[ax_blas_ok=yes;BLAS_LIBS="-lmkl_gf_lp64 -lmkl_sequential -lmkl_core -lpthread"],,
+			[-lmkl_gf_lp64 -lmkl_sequential -lmkl_core -lpthread])
+		# 32 bit
+		elif test $host_cpu = i686; then
+			AC_CHECK_LIB(mkl_gf, $sgemm,
+				[ax_blas_ok=yes;BLAS_LIBS="-lmkl_gf -lmkl_sequential -lmkl_core -lpthread"],,
+				[-lmkl_gf -lmkl_sequential -lmkl_core -lpthread])
+		fi
+	# MKL for other compilers (Intel, PGI, ...?)
+	else
+		# 64-bit
+		if test $host_cpu = x86_64; then
+			AC_CHECK_LIB(mkl_intel_lp64, $sgemm,
+				[ax_blas_ok=yes;BLAS_LIBS="-lmkl_intel_lp64 -lmkl_sequential -lmkl_core -lpthread"],,
+				[-lmkl_intel_lp64 -lmkl_sequential -lmkl_core -lpthread])
+		# 32-bit
+		elif test $host_cpu = i686; then
+			AC_CHECK_LIB(mkl_intel, $sgemm,
+				[ax_blas_ok=yes;BLAS_LIBS="-lmkl_intel -lmkl_sequential -lmkl_core -lpthread"],,
+				[-lmkl_intel -lmkl_sequential -lmkl_core -lpthread])
+		fi
+	fi
+fi
+# Old versions of MKL
+if test $ax_blas_ok = no; then
+	AC_CHECK_LIB(mkl, $sgemm, [ax_blas_ok=yes;BLAS_LIBS="-lmkl -lguide -lpthread"],,[-lguide -lpthread])
+fi
+
+# BLAS in Apple vecLib library?
+if test $ax_blas_ok = no; then
+	save_LIBS="$LIBS"; LIBS="-framework vecLib $LIBS"
+	AC_MSG_CHECKING([for $sgemm in -framework vecLib])
+	AC_TRY_LINK_FUNC($sgemm, [ax_blas_ok=yes;BLAS_LIBS="-framework vecLib"])
+	AC_MSG_RESULT($ax_blas_ok)
+	LIBS="$save_LIBS"
+fi
+
+# BLAS in Alpha CXML library?
+if test $ax_blas_ok = no; then
+	AC_CHECK_LIB(cxml, $sgemm, [ax_blas_ok=yes;BLAS_LIBS="-lcxml"])
+fi
+
+# BLAS in Alpha DXML library? (now called CXML, see above)
+if test $ax_blas_ok = no; then
+	AC_CHECK_LIB(dxml, $sgemm, [ax_blas_ok=yes;BLAS_LIBS="-ldxml"])
+fi
+
+# BLAS in Sun Performance library?
+if test $ax_blas_ok = no; then
+	if test "x$GCC" != xyes; then # only works with Sun CC
+		AC_CHECK_LIB(sunmath, acosp,
+			[AC_CHECK_LIB(sunperf, $sgemm,
+				[BLAS_LIBS="-xlic_lib=sunperf -lsunmath"
+                                 ax_blas_ok=yes],[],[-lsunmath])])
+	fi
+fi
+
+# BLAS in SCSL library?  (SGI/Cray Scientific Library)
+if test $ax_blas_ok = no; then
+	AC_CHECK_LIB(scs, $sgemm, [ax_blas_ok=yes; BLAS_LIBS="-lscs"])
+fi
+
+# BLAS in SGIMATH library?
+if test $ax_blas_ok = no; then
+	AC_CHECK_LIB(complib.sgimath, $sgemm,
+		     [ax_blas_ok=yes; BLAS_LIBS="-lcomplib.sgimath"])
+fi
+
+# BLAS in IBM ESSL library? (requires generic BLAS lib, too)
+if test $ax_blas_ok = no; then
+	AC_CHECK_LIB(blas, $sgemm,
+		[AC_CHECK_LIB(essl, $sgemm,
+			[ax_blas_ok=yes; BLAS_LIBS="-lessl -lblas"],
+			[], [-lblas $FLIBS])])
+fi
+
+# Generic BLAS library?
+if test $ax_blas_ok = no; then
+	AC_CHECK_LIB(blas, $sgemm, [ax_blas_ok=yes; BLAS_LIBS="-lblas"])
+fi
+
+AC_SUBST(BLAS_LIBS)
+
+LIBS="$ax_blas_save_LIBS"
+
+# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
+if test x"$ax_blas_ok" = xyes; then
+        ifelse([$1],,AC_DEFINE(HAVE_BLAS,1,[Define if you have a BLAS library.]),[$1])
+        :
+else
+        ax_blas_ok=no
+        $2
+fi
+])dnl AX_BLAS
+
diff --git a/m4/ax_eigen.m4 b/m4/ax_eigen.m4
new file mode 100644
index 0000000000000000000000000000000000000000..c59846ad3c76c243757ef3f81f780d70862bd07b
--- /dev/null
+++ b/m4/ax_eigen.m4
@@ -0,0 +1,87 @@
+#
+#   AX_EIGEN([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
+#
+# DESCRIPTION
+#
+#   This macro looks for EIGEN library (see http://www.netlib.org/lapack/)
+#   On success, it sets the EIGEN_INCLUDE output variable to hold the 
+#   requisite includes.
+#
+#   The user may also use --with-eigen=<include> in order to use some specific
+#   Eigen library.
+#
+#   ACTION-IF-FOUND is a list of shell commands to run if a Eigen library
+#   is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it
+#   is not found. If ACTION-IF-FOUND is not specified, the default action
+#   will define HAVE_EIGEN.
+#
+# LICENSE
+#
+#   Copyright (c) 2009 Steven G. Johnson <stevenj@alum.mit.edu>
+#
+#   This program is free software: you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation, either version 3 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 1
+
+AU_ALIAS([ACX_EIGEN], [AX_EIGEN])
+AC_DEFUN([AX_EIGEN], [
+ax_eigen_ok=no
+
+AC_ARG_WITH(eigen,
+        [AS_HELP_STRING([--with-eigen=directory], [use Eigen directory])],[
+                        EIGEN_INCLUDE="-I$with_eigen/include"
+                        ])
+
+# First, check EIGEN_INCLUDE environment variable
+if test "x$EIGEN_INCLUDE" != x; then
+	old_CXXFLAGS="$CXXFLAGS"
+        AC_LANG_PUSH([C++])
+	CXXFLAGS+=" -I${withval} -DEIGEN"
+
+        # Check for the EIGEN header files
+        AC_CHECK_HEADERS([Eigen/Dense Eigen/LU],[ax_eigen_ok=yes],[ax_eigen_ok=no])
+        AC_LANG_POP()
+        CFLAGS="$old_CFLAGS"
+else
+        old_CXXFLAGS="$CXXFLAGS"
+        CXXFLAGS+=' -I/usr/include/eigen3 -DEIGEN'
+        AC_CHECK_HEADERS([Eigen/Dense Eigen/LU],[ax_eigen_ok=yes],[ax_eigen_ok=no])
+        CFLAGS="$old_CFLAGS"
+fi
+
+AC_SUBST(EIGEN_INCLUDE)
+
+# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
+if test x"$ax_eigen_ok" = xyes; then
+        ifelse([$1],,AC_DEFINE(HAVE_EIGEN,1,[Define if you have EIGEN library.]),[$1])
+        :
+else
+        ax_eigen_ok=no
+        $2
+fi
+])dnl AX_EIGEN
+
diff --git a/m4/ax_lapack.m4 b/m4/ax_lapack.m4
new file mode 100644
index 0000000000000000000000000000000000000000..74bd51255be997daaa7f3d7288ec165c2afd9423
--- /dev/null
+++ b/m4/ax_lapack.m4
@@ -0,0 +1,132 @@
+# ===========================================================================
+#         http://www.gnu.org/software/autoconf-archive/ax_lapack.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_LAPACK([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
+#
+# DESCRIPTION
+#
+#   This macro looks for a library that implements the LAPACK linear-algebra
+#   interface (see http://www.netlib.org/lapack/). On success, it sets the
+#   LAPACK_LIBS output variable to hold the requisite library linkages.
+#
+#   To link with LAPACK, you should link with:
+#
+#     $LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS
+#
+#   in that order. BLAS_LIBS is the output variable of the AX_BLAS macro,
+#   called automatically. FLIBS is the output variable of the
+#   AC_F77_LIBRARY_LDFLAGS macro (called if necessary by AX_BLAS), and is
+#   sometimes necessary in order to link with F77 libraries. Users will also
+#   need to use AC_F77_DUMMY_MAIN (see the autoconf manual), for the same
+#   reason.
+#
+#   The user may also use --with-lapack=<lib> in order to use some specific
+#   LAPACK library <lib>. In order to link successfully, however, be aware
+#   that you will probably need to use the same Fortran compiler (which can
+#   be set via the F77 env. var.) as was used to compile the LAPACK and BLAS
+#   libraries.
+#
+#   ACTION-IF-FOUND is a list of shell commands to run if a LAPACK library
+#   is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it
+#   is not found. If ACTION-IF-FOUND is not specified, the default action
+#   will define HAVE_LAPACK.
+#
+# LICENSE
+#
+#   Copyright (c) 2009 Steven G. Johnson <stevenj@alum.mit.edu>
+#
+#   This program is free software: you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation, either version 3 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 7
+
+AU_ALIAS([ACX_LAPACK], [AX_LAPACK])
+AC_DEFUN([AX_LAPACK], [
+AC_REQUIRE([AX_BLAS])
+ax_lapack_ok=no
+
+AC_ARG_WITH(lapack,
+        [AS_HELP_STRING([--with-lapack=<lib>], [use LAPACK library <lib>])])
+case $with_lapack in
+        yes | "") ;;
+        no) ax_lapack_ok=disable ;;
+        -* | */* | *.a | *.so | *.so.* | *.o) LAPACK_LIBS="$with_lapack" ;;
+        *) LAPACK_LIBS="-l$with_lapack" ;;
+esac
+
+# Get fortran linker name of LAPACK function to check for.
+AC_F77_FUNC(cheev)
+
+# We cannot use LAPACK if BLAS is not found
+if test "x$ax_blas_ok" != xyes; then
+        ax_lapack_ok=noblas
+        LAPACK_LIBS=""
+fi
+
+# First, check LAPACK_LIBS environment variable
+if test "x$LAPACK_LIBS" != x; then
+        save_LIBS="$LIBS"; LIBS="$LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS"
+        AC_MSG_CHECKING([for $cheev in $LAPACK_LIBS])
+        AC_TRY_LINK_FUNC($cheev, [ax_lapack_ok=yes], [LAPACK_LIBS=""])
+        AC_MSG_RESULT($ax_lapack_ok)
+        LIBS="$save_LIBS"
+        if test $ax_lapack_ok = no; then
+                LAPACK_LIBS=""
+        fi
+fi
+
+# LAPACK linked to by default?  (is sometimes included in BLAS lib)
+if test $ax_lapack_ok = no; then
+        save_LIBS="$LIBS"; LIBS="$LIBS $BLAS_LIBS $FLIBS"
+        AC_CHECK_FUNC($cheev, [ax_lapack_ok=yes])
+        LIBS="$save_LIBS"
+fi
+
+# Generic LAPACK library?
+for lapack in lapack lapack_rs6k; do
+        if test $ax_lapack_ok = no; then
+                save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS"
+                AC_CHECK_LIB($lapack, $cheev,
+                    [ax_lapack_ok=yes; LAPACK_LIBS="-l$lapack"], [], [$FLIBS])
+                LIBS="$save_LIBS"
+        fi
+done
+
+AC_SUBST(LAPACK_LIBS)
+
+# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
+if test x"$ax_lapack_ok" = xyes; then
+        ifelse([$1],,AC_DEFINE(HAVE_LAPACK,1,[Define if you have LAPACK library.]),[$1])
+        :
+else
+        ax_lapack_ok=no
+        $2
+fi
+])dnl AX_LAPACK
+
diff --git a/m4/ax_suitesparse.m4 b/m4/ax_suitesparse.m4
new file mode 100644
index 0000000000000000000000000000000000000000..c281b2b3b956d5a57fe028a68992642ea95c760c
--- /dev/null
+++ b/m4/ax_suitesparse.m4
@@ -0,0 +1,105 @@
+# ===========================================================================
+#         http://www.gnu.org/software/autoconf-archive/ax_lapack.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_SUITESPARSE([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
+#
+# DESCRIPTION
+#
+#   This macro looks for SuiteSparse library (see http://www.netlib.org/lapack/)
+#   On success, it sets the SUITESPARSE_LIBS output variable to hold the 
+#   requisite library linkages.
+#
+#   To link with SUITESPARSE, you should link with:
+#
+#     $SUITESPARSE_LIBS
+#
+#   The user may also use --with-suitesparse=<lib> in order to use some specific
+#   SuiteSparse library <lib>.
+#
+#   ACTION-IF-FOUND is a list of shell commands to run if a SUITESPARSE library
+#   is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it
+#   is not found. If ACTION-IF-FOUND is not specified, the default action
+#   will define HAVE_LAPACK.
+#
+# LICENSE
+#
+#   Copyright (c) 2009 Steven G. Johnson <stevenj@alum.mit.edu>
+#
+#   This program is free software: you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation, either version 3 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 1
+
+AU_ALIAS([ACX_SUITESPARSE], [AX_SUITESPARSE])
+AC_DEFUN([AX_SUITESPARSE], [
+ax_suitesparse_ok=no
+
+AC_ARG_WITH(suitesparse,
+        [AS_HELP_STRING([--with-suitesparse=directory], [use SuiteSparse directory])],[
+                        SUITESPARSE_LIBS="-L$with_suitesparse/lib"
+                        SUITESPARSE_INCLUDE="-I$with_suitesparse/include"
+                        ])
+
+# First, check SUITESPARSE_LIBS environment variable
+if test "x$SUITESPARSE_LIBS" != x; then
+        save_LIBS="$LIBS"; LIBS="$SUITESPARSE_LIBS -lumfpack -lm -lsuitesparseconfig"
+        AC_MSG_CHECKING([for umf_l_malloc])
+        AC_TRY_LINK_FUNC(umf_l_malloc, [ax_suitesparse_ok=yes
+                                       SUITESPARSE_LIB="$SUITESPARSE_LIBS -lamd -lbtf -lcamd -lccolamd -lcholmod -lcolamd -lcxsparse -lklu -ldl -lrbio -lspqr -lsuitesparseconfig -lumfpack"], [SUITRSPARSE_LIBS=""])
+        AC_MSG_RESULT($ax_suitesparse_ok)
+        LIBS="$save_LIBS"
+        if test $ax_suitesparse_ok = no; then
+                SUITESPARSE_LIBS=""
+        fi
+	old_CFLAGS="$CFLAGS"
+        CFLAGS=$SUITESPARSE_INCLUDE
+	AC_CHECK_HEADER(umfpack.h,[],[SUITESPARSE_INCLUDE=""
+                                     ax_suitesparse_ok=no])
+        CFLAGS="$old_CFLAGS"
+else
+        AC_CHECK_LIB(umfpack,umf_l_alloc,[SUITESPARSE_LIB="$SUITESPARSE_LIB -lamd -lbtf -lcamd -lccolamd -lcholmod -lcolamd -lcxsparse -lklu -ldl -lrbio -lspqr -lsuitesparseconfig -lumfpack"],[SUITESPARSE_LIB=""])
+        old_CFLAGS="$CFLAGS"
+        AC_CHECK_HEADER(umfpack.h,[],[SUITESPARSE_INCLUDE=""
+                                      ax_suitesparse_ok=no])
+        CFLAGS="$old_CFLAGS"
+fi
+
+AC_SUBST(SUITESPARSE_LIBS)
+AC_SUBST(SUITESPARSE_INCLUDE)
+
+# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
+if test x"$ax_suitesparse_ok" = xyes; then
+        ifelse([$1],,AC_DEFINE(HAVE_SUITESPARSE,1,[Define if you have SUITESPARSE library.]),[$1])
+        :
+else
+        ax_suitesparse_ok=no
+        $2
+fi
+])dnl AX_SUITESPARSE
+
diff --git a/openfpm_data b/openfpm_data
index fb93d17019fdfb1f7c65c463143f5100d506d6d2..dc5e8ac1ad2768f591b8fe79eda98720e979acdc 160000
--- a/openfpm_data
+++ b/openfpm_data
@@ -1 +1 @@
-Subproject commit fb93d17019fdfb1f7c65c463143f5100d506d6d2
+Subproject commit dc5e8ac1ad2768f591b8fe79eda98720e979acdc
diff --git a/openfpm_devices b/openfpm_devices
index ec5abaf0d363649dfa1d5831ac6784868ce418f2..919638297d5c92749400c69c4a271a2d742cf594 160000
--- a/openfpm_devices
+++ b/openfpm_devices
@@ -1 +1 @@
-Subproject commit ec5abaf0d363649dfa1d5831ac6784868ce418f2
+Subproject commit 919638297d5c92749400c69c4a271a2d742cf594
diff --git a/openfpm_io b/openfpm_io
index c54eca6ee2e0bbfefda778df50b369ce9a90323f..7988298e26138d0470851e9053e6640511793363 160000
--- a/openfpm_io
+++ b/openfpm_io
@@ -1 +1 @@
-Subproject commit c54eca6ee2e0bbfefda778df50b369ce9a90323f
+Subproject commit 7988298e26138d0470851e9053e6640511793363
diff --git a/openfpm_vcluster b/openfpm_vcluster
index 46c6cf1a9de627efd44512388e9badf0a62cc7c2..2840e1b55c52b5006bd54250f7a87ef4b5e6eb9e 160000
--- a/openfpm_vcluster
+++ b/openfpm_vcluster
@@ -1 +1 @@
-Subproject commit 46c6cf1a9de627efd44512388e9badf0a62cc7c2
+Subproject commit 2840e1b55c52b5006bd54250f7a87ef4b5e6eb9e