scotch add

CMake/FindPTSCOTCH.cmake

@@ -0,0 +1,423 @@
+###
+#
+# @copyright (c) 2009-2014 The University of Tennessee and The University
+#                          of Tennessee Research Foundation.
+#                          All rights reserved.
+# @copyright (c) 2012-2016 Inria. All rights reserved.
+# @copyright (c) 2012-2014 Bordeaux INP, CNRS (LaBRI UMR 5800), Inria, Univ. Bordeaux. All rights reserved.
+#
+###
+#
+# - Find PTSCOTCH include dirs and libraries
+# Use this module by invoking find_package with the form:
+#  find_package(PTSCOTCH
+#               [REQUIRED]             # Fail with error if ptscotch is not found
+#               [COMPONENTS <comp1> <comp2> ...] # dependencies
+#              )
+#
+#  PTSCOTCH depends on the following libraries:
+#   - Threads
+#   - MPI
+#
+#  COMPONENTS can be some of the following:
+#   - ESMUMPS: to activate detection of PT-Scotch with the esmumps interface
+#
+# This module finds headers and ptscotch library.
+# Results are reported in variables:
+#  PTSCOTCH_FOUND            - True if headers and requested libraries were found
+#  PTSCOTCH_LINKER_FLAGS     - list of required linker flags (excluding -l and -L)
+#  PTSCOTCH_INCLUDE_DIRS     - ptscotch include directories
+#  PTSCOTCH_LIBRARY_DIRS     - Link directories for ptscotch libraries
+#  PTSCOTCH_LIBRARIES        - ptscotch component libraries to be linked
+#  PTSCOTCH_INCLUDE_DIRS_DEP - ptscotch + dependencies include directories
+#  PTSCOTCH_LIBRARY_DIRS_DEP - ptscotch + dependencies link directories
+#  PTSCOTCH_LIBRARIES_DEP    - ptscotch libraries + dependencies
+#  PTSCOTCH_INTSIZE          - Number of octets occupied by a SCOTCH_Num
+#
+# The user can give specific paths where to find the libraries adding cmake
+# options at configure (ex: cmake path/to/project -DPTSCOTCH=path/to/ptscotch):
+#  PTSCOTCH_DIR              - Where to find the base directory of ptscotch
+#  PTSCOTCH_INCDIR           - Where to find the header files
+#  PTSCOTCH_LIBDIR           - Where to find the library files
+# The module can also look for the following environment variables if paths
+# are not given as cmake variable: PTSCOTCH_DIR, PTSCOTCH_INCDIR, PTSCOTCH_LIBDIR
+
+#=============================================================================
+# Copyright 2012-2013 Inria
+# Copyright 2012-2013 Emmanuel Agullo
+# Copyright 2012-2013 Mathieu Faverge
+# Copyright 2012      Cedric Castagnede
+# Copyright 2013-2016 Florent Pruvost
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file MORSE-Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of Morse, substitute the full
+#  License text for the above reference.)
+
+if (NOT PTSCOTCH_FOUND)
+  set(PTSCOTCH_DIR "" CACHE PATH "Installation directory of PTSCOTCH library")
+  if (NOT PTSCOTCH_FIND_QUIETLY)
+    message(STATUS "A cache variable, namely PTSCOTCH_DIR, has been set to specify the install directory of PTSCOTCH")
+  endif()
+endif()
+
+# Set the version to find
+set(PTSCOTCH_LOOK_FOR_ESMUMPS OFF)
+
+if( PTSCOTCH_FIND_COMPONENTS )
+  foreach( component ${PTSCOTCH_FIND_COMPONENTS} )
+    if (${component} STREQUAL "ESMUMPS")
+      # means we look for esmumps library
+      set(PTSCOTCH_LOOK_FOR_ESMUMPS ON)
+    endif()
+  endforeach()
+endif()
+
+# PTSCOTCH depends on Threads, try to find it
+if (NOT THREADS_FOUND)
+  if (PTSCOTCH_FIND_REQUIRED)
+    find_package(Threads REQUIRED)
+  else()
+    find_package(Threads)
+  endif()
+endif()
+
+# PTSCOTCH depends on MPI, try to find it
+if (NOT MPI_FOUND)
+  if (PTSCOTCH_FIND_REQUIRED)
+    find_package(MPI REQUIRED)
+  else()
+    find_package(MPI)
+  endif()
+endif()
+
+# Looking for include
+# -------------------
+
+# Add system include paths to search include
+# ------------------------------------------
+unset(_inc_env)
+set(ENV_PTSCOTCH_DIR "$ENV{PTSCOTCH_DIR}")
+set(ENV_PTSCOTCH_INCDIR "$ENV{PTSCOTCH_INCDIR}")
+if(ENV_PTSCOTCH_INCDIR)
+  list(APPEND _inc_env "${ENV_PTSCOTCH_INCDIR}")
+elseif(ENV_PTSCOTCH_DIR)
+  list(APPEND _inc_env "${ENV_PTSCOTCH_DIR}")
+  list(APPEND _inc_env "${ENV_PTSCOTCH_DIR}/include")
+  list(APPEND _inc_env "${ENV_PTSCOTCH_DIR}/include/ptscotch")
+else()
+  if(WIN32)
+    string(REPLACE ":" ";" _inc_env "$ENV{INCLUDE}")
+  else()
+    string(REPLACE ":" ";" _path_env "$ENV{INCLUDE}")
+    list(APPEND _inc_env "${_path_env}")
+    string(REPLACE ":" ";" _path_env "$ENV{C_INCLUDE_PATH}")
+    list(APPEND _inc_env "${_path_env}")
+    string(REPLACE ":" ";" _path_env "$ENV{CPATH}")
+    list(APPEND _inc_env "${_path_env}")
+    string(REPLACE ":" ";" _path_env "$ENV{INCLUDE_PATH}")
+    list(APPEND _inc_env "${_path_env}")
+  endif()
+endif()
+list(APPEND _inc_env "${CMAKE_PLATFORM_IMPLICIT_INCLUDE_DIRECTORIES}")
+list(APPEND _inc_env "${CMAKE_C_IMPLICIT_INCLUDE_DIRECTORIES}")
+list(REMOVE_DUPLICATES _inc_env)
+
+
+# Try to find the ptscotch header in the given paths
+# -------------------------------------------------
+
+set(PTSCOTCH_hdrs_to_find "ptscotch.h;scotch.h")
+
+# call cmake macro to find the header path
+if(PTSCOTCH_INCDIR)
+  foreach(ptscotch_hdr ${PTSCOTCH_hdrs_to_find})
+    set(PTSCOTCH_${ptscotch_hdr}_DIRS "PTSCOTCH_${ptscotch_hdr}_DIRS-NOTFOUND")
+    find_path(PTSCOTCH_${ptscotch_hdr}_DIRS
+      NAMES ${ptscotch_hdr}
+      HINTS ${PTSCOTCH_INCDIR})
+    mark_as_advanced(PTSCOTCH_${ptscotch_hdr}_DIRS)
+  endforeach()
+else()
+  if(PTSCOTCH_DIR)
+    foreach(ptscotch_hdr ${PTSCOTCH_hdrs_to_find})
+      set(PTSCOTCH_${ptscotch_hdr}_DIRS "PTSCOTCH_${ptscotch_hdr}_DIRS-NOTFOUND")
+      find_path(PTSCOTCH_${ptscotch_hdr}_DIRS
+	NAMES ${ptscotch_hdr}
+	HINTS ${PTSCOTCH_DIR}
+	PATH_SUFFIXES "include" "include/scotch")
+      mark_as_advanced(PTSCOTCH_${ptscotch_hdr}_DIRS)
+    endforeach()
+  else()
+    foreach(ptscotch_hdr ${PTSCOTCH_hdrs_to_find})
+      set(PTSCOTCH_${ptscotch_hdr}_DIRS "PTSCOTCH_${ptscotch_hdr}_DIRS-NOTFOUND")
+      find_path(PTSCOTCH_${ptscotch_hdr}_DIRS
+	NAMES ${ptscotch_hdr}
+	HINTS ${_inc_env}
+	PATH_SUFFIXES "scotch")
+      mark_as_advanced(PTSCOTCH_${ptscotch_hdr}_DIRS)
+    endforeach()
+  endif()
+endif()
+
+# If found, add path to cmake variable
+# ------------------------------------
+foreach(ptscotch_hdr ${PTSCOTCH_hdrs_to_find})
+  if (PTSCOTCH_${ptscotch_hdr}_DIRS)
+    list(APPEND PTSCOTCH_INCLUDE_DIRS "${PTSCOTCH_${ptscotch_hdr}_DIRS}")
+  else ()
+    set(PTSCOTCH_INCLUDE_DIRS "PTSCOTCH_INCLUDE_DIRS-NOTFOUND")
+    if (NOT PTSCOTCH_FIND_QUIETLY)
+      message(STATUS "Looking for ptscotch -- ${ptscotch_hdr} not found")
+    endif()
+  endif()
+endforeach()
+list(REMOVE_DUPLICATES PTSCOTCH_INCLUDE_DIRS)
+
+# Looking for lib
+# ---------------
+
+# Add system library paths to search lib
+# --------------------------------------
+unset(_lib_env)
+set(ENV_PTSCOTCH_LIBDIR "$ENV{PTSCOTCH_LIBDIR}")
+if(ENV_PTSCOTCH_LIBDIR)
+  list(APPEND _lib_env "${ENV_PTSCOTCH_LIBDIR}")
+elseif(ENV_PTSCOTCH_DIR)
+  list(APPEND _lib_env "${ENV_PTSCOTCH_DIR}")
+  list(APPEND _lib_env "${ENV_PTSCOTCH_DIR}/lib")
+else()
+  if(WIN32)
+    string(REPLACE ":" ";" _lib_env "$ENV{LIB}")
+  else()
+    if(APPLE)
+      string(REPLACE ":" ";" _lib_env "$ENV{DYLD_LIBRARY_PATH}")
+    else()
+      string(REPLACE ":" ";" _lib_env "$ENV{LD_LIBRARY_PATH}")
+    endif()
+    list(APPEND _lib_env "${CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES}")
+    list(APPEND _lib_env "${CMAKE_C_IMPLICIT_LINK_DIRECTORIES}")
+  endif()
+endif()
+list(REMOVE_DUPLICATES _lib_env)
+
+# Try to find the ptscotch lib in the given paths
+# ----------------------------------------------
+
+set(PTSCOTCH_libs_to_find "ptscotch;ptscotcherr")
+if (PTSCOTCH_LOOK_FOR_ESMUMPS)
+  list(INSERT PTSCOTCH_libs_to_find 0 "ptesmumps")
+  list(APPEND PTSCOTCH_libs_to_find   "esmumps"  )
+endif()
+list(APPEND PTSCOTCH_libs_to_find "scotch;scotcherr")
+
+# call cmake macro to find the lib path
+if(PTSCOTCH_LIBDIR)
+  foreach(ptscotch_lib ${PTSCOTCH_libs_to_find})
+    set(PTSCOTCH_${ptscotch_lib}_LIBRARY "PTSCOTCH_${ptscotch_lib}_LIBRARY-NOTFOUND")
+    find_library(PTSCOTCH_${ptscotch_lib}_LIBRARY
+      NAMES ${ptscotch_lib}
+      HINTS ${PTSCOTCH_LIBDIR})
+  endforeach()
+else()
+  if(PTSCOTCH_DIR)
+    foreach(ptscotch_lib ${PTSCOTCH_libs_to_find})
+      set(PTSCOTCH_${ptscotch_lib}_LIBRARY "PTSCOTCH_${ptscotch_lib}_LIBRARY-NOTFOUND")
+      find_library(PTSCOTCH_${ptscotch_lib}_LIBRARY
+	NAMES ${ptscotch_lib}
+	HINTS ${PTSCOTCH_DIR}
+	PATH_SUFFIXES lib lib32 lib64)
+    endforeach()
+  else()
+    foreach(ptscotch_lib ${PTSCOTCH_libs_to_find})
+      set(PTSCOTCH_${ptscotch_lib}_LIBRARY "PTSCOTCH_${ptscotch_lib}_LIBRARY-NOTFOUND")
+      find_library(PTSCOTCH_${ptscotch_lib}_LIBRARY
+	NAMES ${ptscotch_lib}
+	HINTS ${_lib_env})
+    endforeach()
+  endif()
+endif()
+
+set(PTSCOTCH_LIBRARIES "")
+set(PTSCOTCH_LIBRARY_DIRS "")
+# If found, add path to cmake variable
+# ------------------------------------
+foreach(ptscotch_lib ${PTSCOTCH_libs_to_find})
+
+  if (PTSCOTCH_${ptscotch_lib}_LIBRARY)
+    get_filename_component(${ptscotch_lib}_lib_path "${PTSCOTCH_${ptscotch_lib}_LIBRARY}" PATH)
+    # set cmake variables
+    list(APPEND PTSCOTCH_LIBRARIES "${PTSCOTCH_${ptscotch_lib}_LIBRARY}")
+    list(APPEND PTSCOTCH_LIBRARY_DIRS "${${ptscotch_lib}_lib_path}")
+  else ()
+    list(APPEND PTSCOTCH_LIBRARIES "${PTSCOTCH_${ptscotch_lib}_LIBRARY}")
+    if (NOT PTSCOTCH_FIND_QUIETLY)
+      message(STATUS "Looking for ptscotch -- lib ${ptscotch_lib} not found")
+    endif()
+  endif ()
+
+  mark_as_advanced(PTSCOTCH_${ptscotch_lib}_LIBRARY)
+
+endforeach()
+list(REMOVE_DUPLICATES PTSCOTCH_LIBRARY_DIRS)
+
+# check a function to validate the find
+if(PTSCOTCH_LIBRARIES)
+
+  set(REQUIRED_LDFLAGS)
+  set(REQUIRED_INCDIRS)
+  set(REQUIRED_LIBDIRS)
+  set(REQUIRED_LIBS)
+
+  # PTSCOTCH
+  if (PTSCOTCH_INCLUDE_DIRS)
+    set(REQUIRED_INCDIRS  "${PTSCOTCH_INCLUDE_DIRS}")
+  endif()
+  if (PTSCOTCH_LIBRARY_DIRS)
+    set(REQUIRED_LIBDIRS "${PTSCOTCH_LIBRARY_DIRS}")
+  endif()
+  set(REQUIRED_LIBS "${PTSCOTCH_LIBRARIES}")
+  # MPI
+  if (MPI_FOUND)
+    if (MPI_C_INCLUDE_PATH)
+      list(APPEND CMAKE_REQUIRED_INCLUDES "${MPI_C_INCLUDE_PATH}")
+    endif()
+    if (MPI_C_LINK_FLAGS)
+      if (${MPI_C_LINK_FLAGS} MATCHES "  -")
+	string(REGEX REPLACE " -" "-" MPI_C_LINK_FLAGS ${MPI_C_LINK_FLAGS})
+      endif()
+      list(APPEND REQUIRED_LDFLAGS "${MPI_C_LINK_FLAGS}")
+    endif()
+    list(APPEND REQUIRED_LIBS "${MPI_C_LIBRARIES}")
+  endif()
+  # THREADS
+  if(CMAKE_THREAD_LIBS_INIT)
+    list(APPEND REQUIRED_LIBS "${CMAKE_THREAD_LIBS_INIT}")
+  endif()
+  set(Z_LIBRARY "Z_LIBRARY-NOTFOUND")
+  find_library(Z_LIBRARY NAMES z)
+  mark_as_advanced(Z_LIBRARY)
+  if(Z_LIBRARY)
+    list(APPEND REQUIRED_LIBS "-lz")
+  endif()
+  set(M_LIBRARY "M_LIBRARY-NOTFOUND")
+  find_library(M_LIBRARY NAMES m)
+  mark_as_advanced(M_LIBRARY)
+  if(M_LIBRARY)
+    list(APPEND REQUIRED_LIBS "-lm")
+  endif()
+  set(RT_LIBRARY "RT_LIBRARY-NOTFOUND")
+  find_library(RT_LIBRARY NAMES rt)
+  mark_as_advanced(RT_LIBRARY)
+  if(RT_LIBRARY)
+    list(APPEND REQUIRED_LIBS "-lrt")
+  endif()
+
+  # set required libraries for link
+  set(CMAKE_REQUIRED_INCLUDES "${REQUIRED_INCDIRS}")
+  set(CMAKE_REQUIRED_LIBRARIES)
+  list(APPEND CMAKE_REQUIRED_LIBRARIES "${REQUIRED_LDFLAGS}")
+  foreach(lib_dir ${REQUIRED_LIBDIRS})
+    list(APPEND CMAKE_REQUIRED_LIBRARIES "-L${lib_dir}")
+  endforeach()
+  list(APPEND CMAKE_REQUIRED_LIBRARIES "${REQUIRED_LIBS}")
+  list(APPEND CMAKE_REQUIRED_FLAGS "${REQUIRED_FLAGS}")
+  string(REGEX REPLACE "^ -" "-" CMAKE_REQUIRED_LIBRARIES "${CMAKE_REQUIRED_LIBRARIES}")
+
+  # test link
+  unset(PTSCOTCH_WORKS CACHE)
+  include(CheckFunctionExists)
+  check_function_exists(SCOTCH_dgraphInit PTSCOTCH_WORKS)
+  mark_as_advanced(PTSCOTCH_WORKS)
+
+  if(PTSCOTCH_WORKS)
+    # save link with dependencies
+    set(PTSCOTCH_LIBRARIES_DEP "${REQUIRED_LIBS}")
+    set(PTSCOTCH_LIBRARY_DIRS_DEP "${REQUIRED_LIBDIRS}")
+    set(PTSCOTCH_INCLUDE_DIRS_DEP "${REQUIRED_INCDIRS}")
+    set(PTSCOTCH_LINKER_FLAGS "${REQUIRED_LDFLAGS}")
+    list(REMOVE_DUPLICATES PTSCOTCH_LIBRARY_DIRS_DEP)
+    list(REMOVE_DUPLICATES PTSCOTCH_INCLUDE_DIRS_DEP)
+    list(REMOVE_DUPLICATES PTSCOTCH_LINKER_FLAGS)
+  else()
+    if(NOT PTSCOTCH_FIND_QUIETLY)
+      message(STATUS "Looking for PTSCOTCH : test of SCOTCH_dgraphInit with PTSCOTCH library fails")
+      message(STATUS "CMAKE_REQUIRED_LIBRARIES: ${CMAKE_REQUIRED_LIBRARIES}")
+      message(STATUS "CMAKE_REQUIRED_INCLUDES: ${CMAKE_REQUIRED_INCLUDES}")
+      message(STATUS "Check in CMakeFiles/CMakeError.log to figure out why it fails")
+    endif()
+  endif()
+  set(CMAKE_REQUIRED_INCLUDES)
+  set(CMAKE_REQUIRED_FLAGS)
+  set(CMAKE_REQUIRED_LIBRARIES)
+endif(PTSCOTCH_LIBRARIES)
+
+if (PTSCOTCH_LIBRARIES)
+  list(GET PTSCOTCH_LIBRARIES 0 first_lib)
+  get_filename_component(first_lib_path "${first_lib}" PATH)
+  if (${first_lib_path} MATCHES "/lib(32|64)?$")
+    string(REGEX REPLACE "/lib(32|64)?$" "" not_cached_dir "${first_lib_path}")
+    set(PTSCOTCH_DIR_FOUND "${not_cached_dir}" CACHE PATH "Installation directory of PTSCOTCH library" FORCE)
+  else()
+    set(PTSCOTCH_DIR_FOUND "${first_lib_path}" CACHE PATH "Installation directory of PTSCOTCH library" FORCE)
+  endif()
+endif()
+mark_as_advanced(PTSCOTCH_DIR)
+mark_as_advanced(PTSCOTCH_DIR_FOUND)
+
+# Check the size of SCOTCH_Num
+# ---------------------------------
+set(CMAKE_REQUIRED_INCLUDES ${PTSCOTCH_INCLUDE_DIRS})
+
+include(CheckCSourceRuns)
+#stdio.h and stdint.h should be included by scotch.h directly
+set(PTSCOTCH_C_TEST_SCOTCH_Num_4 "
+#include <stdio.h>
+#include <stdint.h>
+#include <ptscotch.h>
+int main(int argc, char **argv) {
+  if (sizeof(SCOTCH_Num) == 4)
+    return 0;
+  else
+    return 1;
+}
+")
+
+set(PTSCOTCH_C_TEST_SCOTCH_Num_8 "
+#include <stdio.h>
+#include <stdint.h>
+#include <ptscotch.h>
+int main(int argc, char **argv) {
+  if (sizeof(SCOTCH_Num) == 8)
+    return 0;
+  else
+    return 1;
+}
+")
+check_c_source_runs("${PTSCOTCH_C_TEST_SCOTCH_Num_4}" PTSCOTCH_Num_4)
+if(NOT PTSCOTCH_Num_4)
+  check_c_source_runs("${PTSCOTCH_C_TEST_SCOTCH_Num_8}" PTSCOTCH_Num_8)
+  if(NOT PTSCOTCH_Num_8)
+    set(PTSCOTCH_INTSIZE -1)
+  else()
+    set(PTSCOTCH_INTSIZE 8)
+  endif()
+else()
+  set(PTSCOTCH_INTSIZE 4)
+endif()
+set(CMAKE_REQUIRED_INCLUDES "")
+
+# check that PTSCOTCH has been found
+# ---------------------------------
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(PTSCOTCH DEFAULT_MSG
+  PTSCOTCH_LIBRARIES
+  PTSCOTCH_WORKS)
+#
+# TODO: Add possibility to check for specific functions in the library
+#

CMake/FindScotch.cmake

@@ -0,0 +1,369 @@
+###
+#
+# @copyright (c) 2009-2014 The University of Tennessee and The University
+#                          of Tennessee Research Foundation.
+#                          All rights reserved.
+# @copyright (c) 2012-2014 Inria. All rights reserved.
+# @copyright (c) 2012-2014 Bordeaux INP, CNRS (LaBRI UMR 5800), Inria, Univ. Bordeaux. All rights reserved.
+#
+###
+#
+# - Find SCOTCH include dirs and libraries
+# Use this module by invoking find_package with the form:
+#  find_package(SCOTCH
+#               [REQUIRED]             # Fail with error if scotch is not found
+#               [COMPONENTS <comp1> <comp2> ...] # dependencies
+#              )
+#
+#  COMPONENTS can be some of the following:
+#   - ESMUMPS: to activate detection of Scotch with the esmumps interface
+#
+# This module finds headers and scotch library.
+# Results are reported in variables:
+#  SCOTCH_FOUND           - True if headers and requested libraries were found
+#  SCOTCH_INCLUDE_DIRS    - scotch include directories
+#  SCOTCH_LIBRARY_DIRS    - Link directories for scotch libraries
+#  SCOTCH_LIBRARIES       - scotch component libraries to be linked
+#  SCOTCH_INTSIZE         - Number of octets occupied by a SCOTCH_Num
+#
+# The user can give specific paths where to find the libraries adding cmake
+# options at configure (ex: cmake path/to/project -DSCOTCH=path/to/scotch):
+#  SCOTCH_DIR             - Where to find the base directory of scotch
+#  SCOTCH_INCDIR          - Where to find the header files
+#  SCOTCH_LIBDIR          - Where to find the library files
+# The module can also look for the following environment variables if paths
+# are not given as cmake variable: SCOTCH_DIR, SCOTCH_INCDIR, SCOTCH_LIBDIR
+
+#=============================================================================
+# Copyright 2012-2013 Inria
+# Copyright 2012-2013 Emmanuel Agullo
+# Copyright 2012-2013 Mathieu Faverge
+# Copyright 2012      Cedric Castagnede
+# Copyright 2013      Florent Pruvost
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file MORSE-Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of Morse, substitute the full
+#  License text for the above reference.)
+
+if (NOT SCOTCH_FOUND)
+  set(SCOTCH_DIR "" CACHE PATH "Installation directory of SCOTCH library")
+  if (NOT SCOTCH_FIND_QUIETLY)
+    message(STATUS "A cache variable, namely SCOTCH_DIR, has been set to specify the install directory of SCOTCH")
+  endif()
+endif()
+
+# Set the version to find
+set(SCOTCH_LOOK_FOR_ESMUMPS OFF)
+
+if( SCOTCH_FIND_COMPONENTS )
+  foreach( component ${SCOTCH_FIND_COMPONENTS} )
+    if (${component} STREQUAL "ESMUMPS")
+      # means we look for esmumps library
+      set(SCOTCH_LOOK_FOR_ESMUMPS ON)
+    endif()
+  endforeach()
+endif()
+
+# SCOTCH may depend on Threads, try to find it
+if (NOT THREADS_FOUND)
+  if (SCOTCH_FIND_REQUIRED)
+    find_package(Threads REQUIRED)
+  else()
+    find_package(Threads)
+  endif()
+endif()
+
+# Looking for include
+# -------------------
+
+# Add system include paths to search include
+# ------------------------------------------
+unset(_inc_env)
+set(ENV_SCOTCH_DIR "$ENV{SCOTCH_DIR}")
+set(ENV_SCOTCH_INCDIR "$ENV{SCOTCH_INCDIR}")
+if(ENV_SCOTCH_INCDIR)
+  list(APPEND _inc_env "${ENV_SCOTCH_INCDIR}")
+elseif(ENV_SCOTCH_DIR)
+  list(APPEND _inc_env "${ENV_SCOTCH_DIR}")
+  list(APPEND _inc_env "${ENV_SCOTCH_DIR}/include")
+  list(APPEND _inc_env "${ENV_SCOTCH_DIR}/include/scotch")
+else()
+  if(WIN32)
+    string(REPLACE ":" ";" _inc_env "$ENV{INCLUDE}")
+  else()
+    string(REPLACE ":" ";" _path_env "$ENV{INCLUDE}")
+    list(APPEND _inc_env "${_path_env}")
+    string(REPLACE ":" ";" _path_env "$ENV{C_INCLUDE_PATH}")
+    list(APPEND _inc_env "${_path_env}")
+    string(REPLACE ":" ";" _path_env "$ENV{CPATH}")
+    list(APPEND _inc_env "${_path_env}")
+    string(REPLACE ":" ";" _path_env "$ENV{INCLUDE_PATH}")
+    list(APPEND _inc_env "${_path_env}")
+  endif()
+endif()
+list(APPEND _inc_env "${CMAKE_PLATFORM_IMPLICIT_INCLUDE_DIRECTORIES}")
+list(APPEND _inc_env "${CMAKE_C_IMPLICIT_INCLUDE_DIRECTORIES}")
+list(REMOVE_DUPLICATES _inc_env)
+
+
+# Try to find the scotch header in the given paths
+# -------------------------------------------------
+# call cmake macro to find the header path
+if(SCOTCH_INCDIR)
+  set(SCOTCH_scotch.h_DIRS "SCOTCH_scotch.h_DIRS-NOTFOUND")
+  find_path(SCOTCH_scotch.h_DIRS
+    NAMES scotch.h
+    HINTS ${SCOTCH_INCDIR})
+else()
+  if(SCOTCH_DIR)
+    set(SCOTCH_scotch.h_DIRS "SCOTCH_scotch.h_DIRS-NOTFOUND")
+    find_path(SCOTCH_scotch.h_DIRS
+      NAMES scotch.h
+      HINTS ${SCOTCH_DIR}
+      PATH_SUFFIXES "include" "include/scotch")
+  else()
+    set(SCOTCH_scotch.h_DIRS "SCOTCH_scotch.h_DIRS-NOTFOUND")
+    find_path(SCOTCH_scotch.h_DIRS
+      NAMES scotch.h
+      HINTS ${_inc_env}
+      PATH_SUFFIXES "scotch")
+  endif()
+endif()
+mark_as_advanced(SCOTCH_scotch.h_DIRS)
+
+# If found, add path to cmake variable
+# ------------------------------------
+if (SCOTCH_scotch.h_DIRS)
+  set(SCOTCH_INCLUDE_DIRS "${SCOTCH_scotch.h_DIRS}")
+else ()
+  set(SCOTCH_INCLUDE_DIRS "SCOTCH_INCLUDE_DIRS-NOTFOUND")
+  if (NOT SCOTCH_FIND_QUIETLY)
+    message(STATUS "Looking for scotch -- scotch.h not found")
+  endif()
+endif()
+list(REMOVE_DUPLICATES SCOTCH_INCLUDE_DIRS)
+
+# Looking for lib
+# ---------------
+
+# Add system library paths to search lib
+# --------------------------------------
+unset(_lib_env)
+set(ENV_SCOTCH_LIBDIR "$ENV{SCOTCH_LIBDIR}")
+if(ENV_SCOTCH_LIBDIR)
+  list(APPEND _lib_env "${ENV_SCOTCH_LIBDIR}")
+elseif(ENV_SCOTCH_DIR)
+  list(APPEND _lib_env "${ENV_SCOTCH_DIR}")
+  list(APPEND _lib_env "${ENV_SCOTCH_DIR}/lib")
+else()
+  if(WIN32)
+    string(REPLACE ":" ";" _lib_env "$ENV{LIB}")
+  else()
+    if(APPLE)
+      string(REPLACE ":" ";" _lib_env "$ENV{DYLD_LIBRARY_PATH}")
+    else()
+      string(REPLACE ":" ";" _lib_env "$ENV{LD_LIBRARY_PATH}")
+    endif()
+    list(APPEND _lib_env "${CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES}")
+    list(APPEND _lib_env "${CMAKE_C_IMPLICIT_LINK_DIRECTORIES}")
+  endif()
+endif()
+list(REMOVE_DUPLICATES _lib_env)
+
+# Try to find the scotch lib in the given paths
+# ----------------------------------------------
+
+set(SCOTCH_libs_to_find "scotch;scotcherrexit")
+if (SCOTCH_LOOK_FOR_ESMUMPS)
+  list(INSERT SCOTCH_libs_to_find 0 "esmumps")
+endif()
+
+# call cmake macro to find the lib path
+if(SCOTCH_LIBDIR)
+  foreach(scotch_lib ${SCOTCH_libs_to_find})
+    set(SCOTCH_${scotch_lib}_LIBRARY "SCOTCH_${scotch_lib}_LIBRARY-NOTFOUND")
+    find_library(SCOTCH_${scotch_lib}_LIBRARY
+      NAMES ${scotch_lib}
+      HINTS ${SCOTCH_LIBDIR})
+  endforeach()
+else()
+  if(SCOTCH_DIR)
+    foreach(scotch_lib ${SCOTCH_libs_to_find})
+      set(SCOTCH_${scotch_lib}_LIBRARY "SCOTCH_${scotch_lib}_LIBRARY-NOTFOUND")
+      find_library(SCOTCH_${scotch_lib}_LIBRARY
+	NAMES ${scotch_lib}
+	HINTS ${SCOTCH_DIR}
+	PATH_SUFFIXES lib lib32 lib64)
+    endforeach()
+  else()
+    foreach(scotch_lib ${SCOTCH_libs_to_find})
+      set(SCOTCH_${scotch_lib}_LIBRARY "SCOTCH_${scotch_lib}_LIBRARY-NOTFOUND")
+      find_library(SCOTCH_${scotch_lib}_LIBRARY
+	NAMES ${scotch_lib}
+	HINTS ${_lib_env})
+    endforeach()
+  endif()
+endif()
+
+set(SCOTCH_LIBRARIES "")
+set(SCOTCH_LIBRARY_DIRS "")
+# If found, add path to cmake variable
+# ------------------------------------
+foreach(scotch_lib ${SCOTCH_libs_to_find})
+
+  if (SCOTCH_${scotch_lib}_LIBRARY)
+    get_filename_component(${scotch_lib}_lib_path "${SCOTCH_${scotch_lib}_LIBRARY}" PATH)
+    # set cmake variables
+    list(APPEND SCOTCH_LIBRARIES "${SCOTCH_${scotch_lib}_LIBRARY}")
+    list(APPEND SCOTCH_LIBRARY_DIRS "${${scotch_lib}_lib_path}")
+  else ()
+    list(APPEND SCOTCH_LIBRARIES "${SCOTCH_${scotch_lib}_LIBRARY}")
+    if (NOT SCOTCH_FIND_QUIETLY)
+      message(STATUS "Looking for scotch -- lib ${scotch_lib} not found")
+    endif()
+  endif ()
+
+  mark_as_advanced(SCOTCH_${scotch_lib}_LIBRARY)
+
+endforeach()
+list(REMOVE_DUPLICATES SCOTCH_LIBRARY_DIRS)
+
+# check a function to validate the find
+if(SCOTCH_LIBRARIES)
+
+  set(REQUIRED_INCDIRS)
+  set(REQUIRED_LIBDIRS)
+  set(REQUIRED_LIBS)
+
+  # SCOTCH
+  if (SCOTCH_INCLUDE_DIRS)
+    set(REQUIRED_INCDIRS  "${SCOTCH_INCLUDE_DIRS}")
+  endif()
+  if (SCOTCH_LIBRARY_DIRS)
+    set(REQUIRED_LIBDIRS "${SCOTCH_LIBRARY_DIRS}")
+  endif()
+  set(REQUIRED_LIBS "${SCOTCH_LIBRARIES}")
+  # THREADS
+  if(CMAKE_THREAD_LIBS_INIT)
+    list(APPEND REQUIRED_LIBS "${CMAKE_THREAD_LIBS_INIT}")
+  endif()
+  set(Z_LIBRARY "Z_LIBRARY-NOTFOUND")
+  find_library(Z_LIBRARY NAMES z)
+  mark_as_advanced(Z_LIBRARY)
+  if(Z_LIBRARY)
+    list(APPEND REQUIRED_LIBS "-lz")
+  endif()
+  set(M_LIBRARY "M_LIBRARY-NOTFOUND")
+  find_library(M_LIBRARY NAMES m)
+  mark_as_advanced(M_LIBRARY)
+  if(M_LIBRARY)
+    list(APPEND REQUIRED_LIBS "-lm")
+  endif()
+  set(RT_LIBRARY "RT_LIBRARY-NOTFOUND")
+  find_library(RT_LIBRARY NAMES rt)
+  mark_as_advanced(RT_LIBRARY)
+  if(RT_LIBRARY)
+    list(APPEND REQUIRED_LIBS "-lrt")
+  endif()
+
+  # set required libraries for link
+  set(CMAKE_REQUIRED_INCLUDES "${REQUIRED_INCDIRS}")
+  set(CMAKE_REQUIRED_LIBRARIES)
+  foreach(lib_dir ${REQUIRED_LIBDIRS})
+    list(APPEND CMAKE_REQUIRED_LIBRARIES "-L${lib_dir}")
+  endforeach()
+  list(APPEND CMAKE_REQUIRED_LIBRARIES "${REQUIRED_LIBS}")
+  string(REGEX REPLACE "^ -" "-" CMAKE_REQUIRED_LIBRARIES "${CMAKE_REQUIRED_LIBRARIES}")
+
+  # test link
+  unset(SCOTCH_WORKS CACHE)
+  include(CheckFunctionExists)
+  check_function_exists(SCOTCH_graphInit SCOTCH_WORKS)
+  mark_as_advanced(SCOTCH_WORKS)
+
+  if(SCOTCH_WORKS)
+    # save link with dependencies
+    set(SCOTCH_LIBRARIES "${REQUIRED_LIBS}")
+  else()
+    if(NOT SCOTCH_FIND_QUIETLY)
+      message(STATUS "Looking for SCOTCH : test of SCOTCH_graphInit with SCOTCH library fails")
+      message(STATUS "CMAKE_REQUIRED_LIBRARIES: ${CMAKE_REQUIRED_LIBRARIES}")
+      message(STATUS "CMAKE_REQUIRED_INCLUDES: ${CMAKE_REQUIRED_INCLUDES}")
+      message(STATUS "Check in CMakeFiles/CMakeError.log to figure out why it fails")
+    endif()
+  endif()
+  set(CMAKE_REQUIRED_INCLUDES)
+  set(CMAKE_REQUIRED_FLAGS)
+  set(CMAKE_REQUIRED_LIBRARIES)
+endif(SCOTCH_LIBRARIES)
+
+if (SCOTCH_LIBRARIES)
+  list(GET SCOTCH_LIBRARIES 0 first_lib)
+  get_filename_component(first_lib_path "${first_lib}" PATH)
+  if (${first_lib_path} MATCHES "/lib(32|64)?$")
+    string(REGEX REPLACE "/lib(32|64)?$" "" not_cached_dir "${first_lib_path}")
+    set(SCOTCH_DIR_FOUND "${not_cached_dir}" CACHE PATH "Installation directory of SCOTCH library" FORCE)
+  else()
+    set(SCOTCH_DIR_FOUND "${first_lib_path}" CACHE PATH "Installation directory of SCOTCH library" FORCE)
+  endif()
+endif()
+mark_as_advanced(SCOTCH_DIR)
+mark_as_advanced(SCOTCH_DIR_FOUND)
+
+# Check the size of SCOTCH_Num
+# ---------------------------------
+set(CMAKE_REQUIRED_INCLUDES ${SCOTCH_INCLUDE_DIRS})
+
+include(CheckCSourceRuns)
+#stdio.h and stdint.h should be included by scotch.h directly
+set(SCOTCH_C_TEST_SCOTCH_Num_4 "
+#include <stdio.h>
+#include <stdint.h>
+#include <scotch.h>
+int main(int argc, char **argv) {
+  if (sizeof(SCOTCH_Num) == 4)
+    return 0;
+  else
+    return 1;
+}
+")
+
+set(SCOTCH_C_TEST_SCOTCH_Num_8 "
+#include <stdio.h>
+#include <stdint.h>
+#include <scotch.h>
+int main(int argc, char **argv) {
+  if (sizeof(SCOTCH_Num) == 8)
+    return 0;
+  else
+    return 1;
+}
+")
+check_c_source_runs("${SCOTCH_C_TEST_SCOTCH_Num_4}" SCOTCH_Num_4)
+if(NOT SCOTCH_Num_4)
+  check_c_source_runs("${SCOTCH_C_TEST_SCOTCH_Num_8}" SCOTCH_Num_8)
+  if(NOT SCOTCH_Num_8)
+    set(SCOTCH_INTSIZE -1)
+  else()
+    set(SCOTCH_INTSIZE 8)
+  endif()
+else()
+  set(SCOTCH_INTSIZE 4)
+endif()
+set(CMAKE_REQUIRED_INCLUDES "")
+
+# check that SCOTCH has been found
+# ---------------------------------
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(SCOTCH DEFAULT_MSG
+  SCOTCH_LIBRARIES
+  SCOTCH_WORKS)
+#
+# TODO: Add possibility to check for specific functions in the library
+#