CMakeLists.txt

# Gmsh - Copyright (C) 1997-2015 C. Geuzaine, J.-F. Remacle
#
# See the LICENSE.txt file for license information. Please report all
# bugs and problems to the public mailing list <gmsh@geuz.org>.

cmake_minimum_required(VERSION 2.8 FATAL_ERROR)

# do not warn about non-definition of WIN32 on cygwin
set(CMAKE_LEGACY_CYGWIN_WIN32 0) 

# if CMAKE_BUILD_TYPE is specified use it; otherwise set the default
# build type to "RelWithDebInfo" ("-O2 -g" with gcc) prior to calling
# project()
if(DEFINED CMAKE_BUILD_TYPE)
  set(CMAKE_BUILD_TYPE ${CMAKE_BUILD_TYPE} CACHE STRING "Choose build type")
else(DEFINED CMAKE_BUILD_TYPE)
  set(CMAKE_BUILD_TYPE RelWithDebInfo CACHE STRING "Choose build type")
endif(DEFINED CMAKE_BUILD_TYPE)

project(gmsh CXX C)

# this variable controls the default value of the options which are normally set
# to ON (useful if you want to configure a minimal version of Gmsh: e.g. "cmake
# -DDEFAULT=0 -DENABLE_POST=1 -DENABLE_PARSER=1")
set(DEFAULT ON CACHE INTERNAL "Default value for enabled-by-default options")

macro(opt OPTION HELP VALUE)
  option(ENABLE_${OPTION} ${HELP} ${VALUE})
  set(OPT_TEXI "${OPT_TEXI}\n@item ENABLE_${OPTION}\n${HELP} (default: ${VALUE})")
endmacro(opt)

opt(3M "Enable proprietary 3M extension" OFF)
opt(ACIS "Enable ACIS geometrical models (experimental)" ${DEFAULT})
opt(ANN "Enable ANN (used for fast point search in mesh/post)" ${DEFAULT})
opt(BAMG "Enable Bamg 2D anisotropic mesh generator" ${DEFAULT})
opt(BFGS "Enable BFGS (used by some mesh optimizers)" ${DEFAULT})
opt(BLAS_LAPACK "Enable BLAS/Lapack for linear algebra (required for meshing)" ON)
opt(BLOSSOM "Enable Blossom algorithm (needed for full quad meshing)" ${DEFAULT})
opt(BUILD_LIB "Enable 'lib' target for building static Gmsh library" OFF)
opt(BUILD_SHARED "Enable 'shared' target for building shared Gmsh library" OFF)
opt(BUILD_DYNAMIC "Enable dynamic Gmsh executable (linked with shared lib)" OFF)
opt(BUILD_ANDROID "Enable Android NDK library target (experimental)" OFF)
opt(BUILD_IOS "Enable iOS (ARM) library target (experimental)" OFF)
opt(CGNS "Enable CGNS mesh export (experimental)" OFF)
opt(CAIRO "Enable Cairo to render fonts (experimental)" ${DEFAULT})
opt(CHACO "Enable Chaco mesh partitioner (alternative to Metis)" ${DEFAULT})
opt(COMPRESSED_IO "Enable compressed (gzip) input/output using zlib" OFF)
opt(DINTEGRATION "Enable discrete integration (needed for levelsets)" ${DEFAULT})
opt(FLTK "Enable FLTK graphical user interface (requires mesh/post)" ${DEFAULT})
opt(FOURIER_MODEL "Enable Fourier geometrical models (experimental)" OFF)
opt(GMM "Enable GMM linear solvers (simple alternative to PETSc)" ${DEFAULT})
opt(GRAPHICS "Enable building graphics lib even without GUI (advanced)" OFF)
opt(KBIPACK "Enable Kbipack (neeeded by homology solver)" ${DEFAULT})
opt(MATHEX "Enable math expression parser (used by plugins and options)" ${DEFAULT})
opt(MED "Enable MED mesh and post file formats" ${DEFAULT})
opt(MESH "Enable mesh module (required by GUI)" ${DEFAULT})
opt(METIS "Enable Metis mesh partitioner" ${DEFAULT})
opt(MMG3D "Enable MMG3D 3D anisotropic mesh refinement" ${DEFAULT})
opt(MPEG_ENCODE "Enable built-in MPEG movie encoder" ${DEFAULT})
opt(MPI "Enable MPI (mostly for parser and solver - mesh generation is sequential)" OFF)
opt(MSVC_STATIC_RUNTIME "Enable static Visual C++ runtime" OFF)
opt(MUMPS "Enable MUMPS sparse direct linear solver" OFF)
opt(NATIVE_FILE_CHOOSER "Enable native file chooser in GUI" ${DEFAULT})
opt(NETGEN "Enable Netgen 3D frontal mesh generator" ${DEFAULT})
opt(NUMPY "Enable conversion between fullMatrix and numpy array (requires SWIG)" OFF)
opt(PETSC4PY "Enable petsc4py wrappers for petsc matrices" ON)
opt(OCC "Enable Open CASCADE geometrical models" ${DEFAULT})
opt(ONELAB "Enable ONELAB solver interface" ${DEFAULT})
opt(ONELAB2 "Enable experimental ONELAB-Cloud solver interface" OFF)
if(ENABLE_ONELAB2)
  opt(UDT "Enable UDT library for ONELAB-Cloud" ON)
endif(ENABLE_ONELAB2)
opt(ONELAB_METAMODEL "Enable ONELAB metamodels (experimental)" ${DEFAULT})
opt(OPENMP "Enable OpenMP (experimental)" OFF)
opt(OPTHOM "Enable high-order mesh optimization tools" ${DEFAULT})
opt(OS_SPECIFIC_INSTALL "Enable OS-specific (e.g. app bundle) installation" ${DEFAULT})
opt(OSMESA "Enable OSMesa for offscreen rendering (experimental)" OFF)
opt(PARSER "Enable GEO file parser (required for .geo/.pos files)" ${DEFAULT})
opt(PETSC "Enable PETSc linear solvers (required for SLEPc)" ${DEFAULT})
opt(PLUGINS "Enable post-processing plugins" ${DEFAULT})
opt(POST "Enable post-processing module (required by GUI)" ${DEFAULT})
opt(POPPLER "Enable Poppler for displaying PDF documents (experimental)" OFF)
opt(QT "Enable dummy QT graphical interface proof-of-concept (experimental)" OFF)
opt(SALOME "Enable Salome routines for CAD healing" ${DEFAULT})
opt(SGEOM "Enable SGEOM interface to OCC (experimental)" OFF)
opt(SLEPC "Enable SLEPc eigensolvers (required for conformal compounds)" ${DEFAULT})
opt(SOLVER "Enable built-in finite element solvers (required for compounds)" ${DEFAULT})
opt(TAUCS "Enable Taucs linear solver (alternative to PETSc)" ${DEFAULT})
opt(TCMALLOC "Enable libtcmalloc, a fast malloc implementation but that does not release memory" OFF)
opt(TETGEN "Enable Tetgen 3D initial mesh generator" ${DEFAULT})
opt(TETGEN_OLD "Enable older version of Tetgen" OFF)
opt(VORO3D "Enable Voro3D (for hex meshing, experimental)" ${DEFAULT})
opt(WRAP_JAVA "Enable generation of Java wrappers (experimental)" OFF)
opt(WRAP_PYTHON "Enable generation of Python wrappers" OFF)

set(GMSH_MAJOR_VERSION 2)
set(GMSH_MINOR_VERSION 9)
set(GMSH_PATCH_VERSION 2)
set(GMSH_EXTRA_VERSION "" CACHE STRING "Gmsh extra version string")

set(GMSH_VERSION "${GMSH_MAJOR_VERSION}.${GMSH_MINOR_VERSION}")
set(GMSH_VERSION "${GMSH_VERSION}.${GMSH_PATCH_VERSION}${GMSH_EXTRA_VERSION}")
set(GMSH_SHORT_LICENSE "GNU General Public License")

set(GMSH_API
  ${CMAKE_CURRENT_BINARY_DIR}/Common/GmshConfig.h 
  ${CMAKE_CURRENT_BINARY_DIR}/Common/GmshVersion.h
  Common/Gmsh.h Common/Context.h Common/GmshDefines.h Common/GmshMessage.h
    Common/VertexArray.h Common/Octree.h Common/OctreeInternals.h 
    Common/OS.h Common/StringUtils.h Common/OpenFile.h
    Common/onelab.h Common/GmshSocket.h Common/onelabUtils.h
  Numeric/Numeric.h Numeric/GaussIntegration.h Numeric/polynomialBasis.h
    Numeric/JacobianBasis.h Numeric/MetricBasis.h Numeric/bezierBasis.h Numeric/fullMatrix.h
    Numeric/FuncSpaceData.h
    Numeric/simpleFunction.h Numeric/cartesian.h Numeric/ElementType.h
    Numeric/BasisFactory.h
  Geo/GModel.h Geo/GEntity.h Geo/GPoint.h Geo/GVertex.h Geo/GEdge.h 
    Geo/GFace.h Geo/GRegion.h Geo/GEdgeLoop.h Geo/GEdgeCompound.h 
    Geo/GFaceCompound.h Geo/GRegionCompound.h Geo/GRbf.h Geo/MVertex.h
    Geo/MVertexBoundaryLayerData.h Geo/MEdge.h 
    Geo/MFace.h Geo/MElement.h Geo/MElementOctree.h Geo/MPoint.h Geo/MLine.h 
    Geo/MTriangle.h Geo/MQuadrangle.h Geo/MTetrahedron.h Geo/MHexahedron.h 
    Geo/MPrism.h Geo/MPyramid.h Geo/MElementCut.h Geo/MElementOctree.h 
    Geo/discreteVertex.h Geo/discreteEdge.h Geo/discreteFace.h Geo/discreteRegion.h 
    Geo/SPoint2.h Geo/SPoint3.h Geo/SVector3.h Geo/STensor3.h Geo/SBoundingBox3d.h 
    Geo/Pair.h Geo/Range.h Geo/SOrientedBoundingBox.h 
    Geo/CellComplex.h Geo/ChainComplex.h Geo/Cell.h Geo/Homology.h Geo/Chain.h 
    Geo/GenericVertex.h Geo/GenericEdge.h Geo/GenericFace.h Geo/GenericRegion.h
    Geo/partitionEdge.h Geo/CGNSOptions.h Geo/gmshLevelset.h Geo/boundaryLayersData.h
  Mesh/meshGEdge.h Mesh/meshGFace.h Mesh/meshGFaceOptimize.h 
    Mesh/meshGFaceElliptic.h Mesh/meshPartition.h Mesh/meshGFaceDelaunayInsertion.h 
    Mesh/simple3D.h Mesh/meshPartitionOptions.h Mesh/directions3D.h Mesh/yamakawa.h
    Mesh/Voronoi3D.h Mesh/Levy3D.h Mesh/periodical.h Mesh/meshMetric.h
  Numeric/mathEvaluator.h
  Solver/dofManager.h Solver/femTerm.h Solver/laplaceTerm.h Solver/elasticityTerm.h
    Solver/crossConfTerm.h Solver/orthogonalTerm.h
    Solver/linearSystem.h Solver/linearSystemGMM.h Solver/linearSystemCSR.h 
    Solver/linearSystemFull.h Solver/elasticitySolver.h Solver/sparsityPattern.h 
    Solver/groupOfElements.h Solver/linearSystemPETSc.h Solver/linearSystemMUMPS.h
    Solver/thermicSolver.h
  Post/PView.h Post/PViewData.h Plugin/PluginManager.h Post/OctreePost.h 
  Post/PViewDataList.h Post/PViewDataGModel.h Post/PViewOptions.h Post/ColorTable.h
   Numeric/nodalBasis.h
  Graphics/drawContext.h
  contrib/kbipack/gmp_normal_form.h contrib/kbipack/gmp_matrix.h 
    contrib/kbipack/gmp_blas.h contrib/kbipack/mpz.h
  contrib/DiscreteIntegration/Integration3D.h
  contrib/HighOrderMeshOptimizer/OptHOM.h contrib/HighOrderMeshOptimizer/OptHomMesh.h
  contrib/HighOrderMeshOptimizer/OptHomRun.h contrib/HighOrderMeshOptimizer/ParamCoord.h
  contrib/HighOrderMeshOptimizer/OptHomFastCurving.h contrib/HighOrderMeshOptimizer/SuperEl.h
  contrib/HighOrderMeshOptimizer/OptHomIntegralBoundaryDist.h
  contrib/HighOrderMeshOptimizer/CADDistances.h
  contrib/HighOrderMeshOptimizer/OptHomObjContribScaledJac.h
  contrib/HighOrderMeshOptimizer/OptHomObjContribMetricMin.h
  contrib/HighOrderMeshOptimizer/OptHomObjContribCADDist.h
  contrib/MeshOptimizer/MeshOptPatch.h contrib/MeshOptimizer/MeshOpt.h
  contrib/MeshOptimizer/MeshOptCommon.h contrib/MeshOptimizer/MeshOptimizer.h
  contrib/MeshOptimizer/MeshOptObjContribFunc.h contrib/MeshOptimizer/MeshOptObjContrib.h
  contrib/MeshOptimizer/MeshOptObjContribScaledNodeDispSq.h
  contrib/MeshOptimizer/MeshOptObjectiveFunction.h contrib/MeshOptimizer/MeshOptVertexCoord.h 
  contrib/MeshQualityOptimizer/MeshQualityObjContribIdealJac.h
  contrib/MeshQualityOptimizer/MeshQualityObjContribInvCond.h
  contrib/MeshQualityOptimizer/MeshQualityOptimizer.h
  contrib/MathEx/mathex.h)

get_property(IAMCHILD DIRECTORY  PROPERTY PARENT_DIRECTORY)
if(IAMCHILD)
  set(GMSH_API ${GMSH_API} PARENT_SCOPE)
endif(IAMCHILD)

execute_process(COMMAND date "+%Y%m%d" OUTPUT_VARIABLE DATE 
                OUTPUT_STRIP_TRAILING_WHITESPACE)
execute_process(COMMAND hostname OUTPUT_VARIABLE HOSTNAME 
                OUTPUT_STRIP_TRAILING_WHITESPACE)
execute_process(COMMAND whoami OUTPUT_VARIABLE PACKAGER 
                OUTPUT_STRIP_TRAILING_WHITESPACE)

if(NOT DATE)
  set(DATE "unknown")
endif(NOT DATE)
set(GMSH_DATE "${DATE}")

if(NOT HOSTNAME)
  set(HOSTNAME "unknown")
endif(NOT HOSTNAME)
set(GMSH_HOST "${HOSTNAME}")

if(NOT PACKAGER)
  set(PACKAGER "unknown")
endif(NOT PACKAGER)
set(GMSH_PACKAGER "${PACKAGER}")

if(APPLE)
  set(GMSH_OS "MacOSX")
elseif(CYGWIN)
  set(GMSH_OS "Windows")
else(APPLE)
  set(GMSH_OS "${CMAKE_SYSTEM_NAME}")
endif(APPLE)

include(CheckTypeSize)
include(CheckFunctionExists)
include(CheckIncludeFile)
include(CheckCXXCompilerFlag)

if(MSVC)
  # remove annoying warning about bool/int cast performance
  set(GMSH_CONFIG_PRAGMAS "#pragma warning(disable:4800 4244 4267)")
  if(ENABLE_MSVC_STATIC_RUNTIME)
    foreach(VAR
            CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
            CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO
            CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
            CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO)
      if(${VAR} MATCHES "/MD")
        string(REGEX REPLACE "/MD" "/MT" ${VAR} "${${VAR}}")
      endif(${VAR} MATCHES "/MD")
    endforeach(VAR)
  endif(ENABLE_MSVC_STATIC_RUNTIME)
endif(MSVC)

if(ENABLE_OPENMP)
  find_package(OpenMP)
  if(OPENMP_FOUND)
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
  endif(OPENMP_FOUND)
endif(ENABLE_OPENMP)

macro(append_gmsh_src DIRNAME FILES)
  foreach(FILE ${FILES})
    list(APPEND LIST ${DIRNAME}/${FILE})
  endforeach(FILE)
  set(GMSH_SRC ${GMSH_SRC};${LIST} PARENT_SCOPE)
  set(GMSH_DIRS ${GMSH_DIRS};${DIRNAME} PARENT_SCOPE)
endmacro(append_gmsh_src)

macro(find_all_libraries VARNAME LISTNAME PATH SUFFIX)
  set(${VARNAME})
  list(LENGTH ${LISTNAME} NUM_LIST)
  foreach(LIB ${${LISTNAME}})
    find_library(FOUND_LIB ${LIB} PATHS ${PATH} PATH_SUFFIXES ${SUFFIX})
    if(FOUND_LIB)
      list(APPEND ${VARNAME} ${FOUND_LIB})
    endif(FOUND_LIB)
    unset(FOUND_LIB CACHE)
  endforeach(LIB)
  list(LENGTH ${VARNAME} NUM_FOUND_LIBRARIES)
  if(NUM_FOUND_LIBRARIES LESS NUM_LIST)
    set(${VARNAME})
  endif(NUM_FOUND_LIBRARIES LESS NUM_LIST)
endmacro(find_all_libraries)

macro(set_config_option VARNAME STRING)
  set(${VARNAME} TRUE)
  list(APPEND CONFIG_OPTIONS ${STRING})
  message(STATUS "Found " ${STRING})
endmacro(set_config_option)

# check if the machine is 64 bits (this is more reliable than using
# CMAKE_SIZEOF_VOID_P, which does not seem to work e.g. on some Suse
# machines)
check_type_size("void*" SIZEOF_VOID_P)
if(SIZEOF_VOID_P EQUAL 8)
  set_config_option(HAVE_64BIT_SIZE_T "64Bit")
endif(SIZEOF_VOID_P EQUAL 8)

if(ENABLE_BLAS_LAPACK)
  if(BLAS_LAPACK_LIBRARIES)
    # use libs as specified in the BLAS_LAPACK_LIBRARIES variable
    set_config_option(HAVE_BLAS "Blas(Custom)")
    set_config_option(HAVE_LAPACK "Lapack(Custom)")
    set(LAPACK_LIBRARIES ${BLAS_LAPACK_LIBRARIES})
  else(BLAS_LAPACK_LIBRARIES)
    if(MSVC)
      # on Windows with Visual C++ try really hard to find blas/lapack *without*
      # requiring a Fortran compiler: 1) try to find the Intel MKL libs using
      # the standard search path; if not found 2) try to get the reference
      # blas/lapack libs (useful for users with no Fortran compiler and no MKL
      # license, who can just download our precompiled "gmsh-dep" package)
      if(HAVE_64BIT_SIZE_T)
        set(MKL_PATH em64t/lib)
        set(MKL_LIBS_REQUIRED libguide40 mkl_intel_lp64 mkl_intel_thread mkl_core)
      else(HAVE_64BIT_SIZE_T)
        set(MKL_PATH ia32/lib)
        set(MKL_LIBS_REQUIRED libguide40 mkl_intel_c mkl_intel_thread mkl_core)
      endif(HAVE_64BIT_SIZE_T)
      find_all_libraries(LAPACK_LIBRARIES MKL_LIBS_REQUIRED "" ${MKL_PATH})
      if(LAPACK_LIBRARIES)
        set_config_option(HAVE_BLAS "Blas(IntelMKL)")
        set_config_option(HAVE_LAPACK "Lapack(IntelMKL)")
      else(LAPACK_LIBRARIES)
        set(REFLAPACK_LIBS_REQUIRED lapack blas g2c gcc)
        find_all_libraries(LAPACK_LIBRARIES REFLAPACK_LIBS_REQUIRED "" "")
        if(LAPACK_LIBRARIES)
          set_config_option(HAVE_BLAS "Blas(Reference)")
          set_config_option(HAVE_LAPACK "Lapack(Reference)")
        endif(LAPACK_LIBRARIES)
      endif(LAPACK_LIBRARIES)
    elseif(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
      # on Linux try to find the Intel MKL without a Fortran compiler
      if(HAVE_64BIT_SIZE_T)
        set(MKL_PATH lib/em64t)
      else(HAVE_64BIT_SIZE_T)
        set(MKL_PATH lib/32)
      endif(HAVE_64BIT_SIZE_T)
      set(MKL_LIBS_REQUIRED mkl_gf_lp64 iomp5 mkl_gnu_thread mkl_core guide pthread)
      find_all_libraries(LAPACK_LIBRARIES MKL_LIBS_REQUIRED "" ${MKL_PATH})
      if(NOT LAPACK_LIBRARIES)
        # match lapack 9.0 on 64bit
        set(MKL_LIBS_REQUIRED mkl_lapack mkl_em64t guide)
        find_all_libraries(LAPACK_LIBRARIES MKL_LIBS_REQUIRED "" ${MKL_PATH})
      endif(NOT LAPACK_LIBRARIES)
      if(LAPACK_LIBRARIES)
        set_config_option(HAVE_BLAS "Blas(IntelMKL)")
        set_config_option(HAVE_LAPACK "Lapack(IntelMKL)")
      else(LAPACK_LIBRARIES)
        # on Linux also try to find ATLAS without a Fortran compiler, because
        # cmake ships with a buggy FindBLAS e.g. on Ubuntu Lucid Lynx
        set(ATLAS_LIBS_REQUIRED lapack f77blas cblas atlas)
        find_all_libraries(LAPACK_LIBRARIES ATLAS_LIBS_REQUIRED "" "")
        if(LAPACK_LIBRARIES)
          set_config_option(HAVE_BLAS "Blas(ATLAS)")
          set_config_option(HAVE_LAPACK "Lapack(ATLAS)")
        else(LAPACK_LIBRARIES)
          # try with generic names
          set(GENERIC_LIBS_REQUIRED lapack blas pthread)
          find_all_libraries(LAPACK_LIBRARIES GENERIC_LIBS_REQUIRED "" "")
          if(LAPACK_LIBRARIES)
            set_config_option(HAVE_BLAS "Blas(Generic)")
            set_config_option(HAVE_LAPACK "Lapack(Generic)")
            find_library(GFORTRAN_LIB gfortran)
            if(GFORTRAN_LIB)
              list(APPEND LAPACK_LIBRARIES ${GFORTRAN_LIB})
            endif(GFORTRAN_LIB)
          endif(LAPACK_LIBRARIES)
        endif(LAPACK_LIBRARIES)
      endif(LAPACK_LIBRARIES)
    elseif(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
      # on SunOS we know blas and lapack are available in sunperf
      set(LAPACK_FLAGS -library=sunperf)
      set_config_option(HAVE_BLAS "Blas(SunPerf)")
      set_config_option(HAVE_LAPACK "Lapack(SunPerf)")
    elseif(APPLE)
      # on Mac we also know that blas and lapack are available
      set(LAPACK_LIBRARIES "-llapack -lblas")
      set_config_option(HAVE_BLAS "Blas(VecLib)")
      set_config_option(HAVE_LAPACK "Lapack(VecLib)")
    endif(MSVC)

    if(ENABLE_BUILD_ANDROID)
      find_library(BLAS_LIB f2cblas PATH_SUFFIXES lib)
      find_library(LAPACK_LIB f2clapack PATH_SUFFIXES lib)
      if(BLAS_LIB)
        list(APPEND EXTERNAL_LIBRARIES ${BLAS_LIB})
        set_config_option(HAVE_BLAS "Blas")
      endif(BLAS_LIB)
      if(LAPACK_LIB)
        list(APPEND EXTERNAL_LIBRARIES ${LAPACK_LIB})
        set_config_option(HAVE_LAPACK "Lapack")
      endif(LAPACK_LIB)
      # for isnan/isinf
      add_definitions(-D_GLIBCXX_USE_C99_MATH=1)
    endif(ENABLE_BUILD_ANDROID)

    if(NOT HAVE_BLAS OR NOT HAVE_LAPACK)
      # if we haven't found blas and lapack check for OpenBlas
      set(OPENBLAS_LIBS_REQUIRED openblas)
      find_all_libraries(LAPACK_LIBRARIES OPENBLAS_LIBS_REQUIRED "" "")
      if(LAPACK_LIBRARIES)
        set_config_option(HAVE_BLAS "Blas(OpenBlas)")
        set_config_option(HAVE_LAPACK "Lapack(OpenBlas)")
        find_library(GFORTRAN_LIB gfortran)
        if(GFORTRAN_LIB)
          list(APPEND LAPACK_LIBRARIES ${GFORTRAN_LIB})
        endif(GFORTRAN_LIB)
      endif(LAPACK_LIBRARIES)  
    endif(NOT HAVE_BLAS OR NOT HAVE_LAPACK)

    if(NOT HAVE_BLAS OR NOT HAVE_LAPACK)
      # if we still haven't found blas and lapack, use the standard cmake tests,
      # which require a working Fortran compiler
      enable_language(Fortran)
      find_package(BLAS)
      if(BLAS_FOUND)
        set_config_option(HAVE_BLAS "Blas")
        find_package(LAPACK)
        if(LAPACK_FOUND)
          set_config_option(HAVE_LAPACK "Lapack")
        else(LAPACK_FOUND)
          set(LAPACK_LIBRARIES ${BLAS_LIBRARIES})
        endif(LAPACK_FOUND)
        if(CMAKE_Fortran_COMPILER_ID MATCHES "GNU")
          if(CMAKE_Fortran_COMPILER MATCHES "gfortran")
            list(APPEND LAPACK_LIBRARIES gfortran)
          elseif(CMAKE_Fortran_COMPILER MATCHES "f95")
            list(APPEND LAPACK_LIBRARIES gfortran)
          elseif(CMAKE_Fortran_COMPILER MATCHES "g77")
            list(APPEND LAPACK_LIBRARIES g2c)
          endif(CMAKE_Fortran_COMPILER MATCHES "gfortran")
        endif(CMAKE_Fortran_COMPILER_ID MATCHES "GNU")
      endif(BLAS_FOUND)
    endif(NOT HAVE_BLAS OR NOT HAVE_LAPACK)

    if(NOT HAVE_BLAS OR NOT HAVE_LAPACK)
      message(STATUS "Warning: Could not find Blas or Lapack: most meshing algorithms "
              "will not be functional")
    endif(NOT HAVE_BLAS OR NOT HAVE_LAPACK)

  endif(BLAS_LAPACK_LIBRARIES)
endif(ENABLE_BLAS_LAPACK)

if(ENABLE_TCMALLOC)
  find_library(TCMALLOC tcmalloc)
  if(TCMALLOC)
    set_config_option(HAVE_TCMALLOC "TCMalloc")
    list(APPEND EXTERNAL_LIBRARIES ${TCMALLOC})
  endif(TCMALLOC)
endif(ENABLE_TCMALLOC)

add_subdirectory(Common)
add_subdirectory(Numeric)
add_subdirectory(Geo)

if(ENABLE_MESH)
  add_subdirectory(Mesh)
  set_config_option(HAVE_MESH "Mesh")
endif(ENABLE_MESH)

if(ENABLE_SOLVER)
  add_subdirectory(Solver)
  set_config_option(HAVE_SOLVER "Solver")
endif(ENABLE_SOLVER)

if(ENABLE_POST)
  add_subdirectory(Post)
  set_config_option(HAVE_POST "Post")
  if(ENABLE_PLUGINS)
    add_subdirectory(Plugin)
    set_config_option(HAVE_PLUGINS "Plugins")
  endif(ENABLE_PLUGINS)
endif(ENABLE_POST)

if(ENABLE_PARSER)
  add_subdirectory(Parser)
  set_config_option(HAVE_PARSER "Parser")
endif(ENABLE_PARSER)

if(ENABLE_FLTK)
  # first, try to use fltk-config for fltk >= 1.3 (FindFLTK is buggy on Unix,
  # where e.g. xft and xinerama options are not dealt with)
  find_program(FLTK_CONFIG_SCRIPT fltk-config)
  if(FLTK_CONFIG_SCRIPT)
    execute_process(COMMAND ${FLTK_CONFIG_SCRIPT} --api-version
                    OUTPUT_VARIABLE FLTK_VERSION)
    string(STRIP ${FLTK_VERSION} FLTK_VERSION)
    if(FLTK_VERSION GREATER 1.1)
      add_subdirectory(Fltk)
      set_config_option(HAVE_FLTK "Fltk")
      message(STATUS "Using fltk-config script for Fltk " ${FLTK_VERSION})
      execute_process(COMMAND ${FLTK_CONFIG_SCRIPT} --use-gl --use-images --includedir
                      OUTPUT_VARIABLE FLTK_INCLUDE_DIR)
      string(STRIP ${FLTK_INCLUDE_DIR} FLTK_INCLUDE_DIR)
      list(APPEND EXTERNAL_INCLUDES ${FLTK_INCLUDE_DIR})
      # On linux (at least OpenSuSE) the following directories are
      # not existing (everything is in /usr/include). To avoid warnings
      # check existance of these directories before adding them
      if(EXISTS ${FLTK_INCLUDE_DIR}/FL/images)
        list(APPEND EXTERNAL_INCLUDES ${FLTK_INCLUDE_DIR}/FL/images)
      endif(EXISTS ${FLTK_INCLUDE_DIR}/FL/images)
      if(EXISTS ${FLTK_INCLUDE_DIR}/jpeg)
        list(APPEND EXTERNAL_INCLUDES ${FLTK_INCLUDE_DIR}/jpeg)
      endif(EXISTS ${FLTK_INCLUDE_DIR}/jpeg)
      if(EXISTS ${FLTK_INCLUDE_DIR}/zlib)
        list(APPEND EXTERNAL_INCLUDES ${FLTK_INCLUDE_DIR}/zlib)
      endif(EXISTS ${FLTK_INCLUDE_DIR}/zlib)
      if(EXISTS ${FLTK_INCLUDE_DIR}/png)
        list(APPEND EXTERNAL_INCLUDES ${FLTK_INCLUDE_DIR}/png)
      endif(EXISTS ${FLTK_INCLUDE_DIR}/png)
      execute_process(COMMAND ${FLTK_CONFIG_SCRIPT} --use-gl --use-images --ldflags
                      OUTPUT_VARIABLE FLTK_LIBRARIES)
      string(STRIP ${FLTK_LIBRARIES} FLTK_LIBRARIES)
      string(REGEX MATCH "fltk[_ ]jpeg" FLTK_JPEG ${FLTK_LIBRARIES})
      string(REGEX MATCH "fltk[_ ]z" FLTK_Z ${FLTK_LIBRARIES})
      string(REGEX MATCH "fltk[_ ]png" FLTK_PNG ${FLTK_LIBRARIES})
    endif(FLTK_VERSION GREATER 1.1)
  endif(FLTK_CONFIG_SCRIPT)
  # then try the built-in FindFLTK module
  if(NOT HAVE_FLTK)
    set(FLTK_SKIP_FORMS TRUE)
    set(FLTK_SKIP_FLUID TRUE)
    find_package(FLTK)
    if(FLTK_FOUND)
      add_subdirectory(Fltk)
      set_config_option(HAVE_FLTK "Fltk")
      list(APPEND EXTERNAL_INCLUDES ${FLTK_INCLUDE_DIR})
      # find fltk jpeg
      find_library(FLTK_JPEG NAMES fltk_jpeg fltkjpeg)
      if(FLTK_JPEG)
        list(APPEND EXTERNAL_LIBRARIES ${FLTK_JPEG})
        foreach(DIR ${FLTK_INCLUDE_DIR})
          list(APPEND EXTERNAL_INCLUDES ${DIR}/FL/images ${DIR}/jpeg)
        endforeach(DIR)
      endif(FLTK_JPEG)
      # find fltk zlib
      find_library(FLTK_Z NAMES fltk_z fltkz)
      if(FLTK_Z)
        list(APPEND EXTERNAL_LIBRARIES ${FLTK_Z})
        foreach(DIR ${FLTK_INCLUDE_DIR})
          list(APPEND EXTERNAL_INCLUDES ${DIR}/FL/images ${DIR}/zlib)
        endforeach(DIR)
      endif(FLTK_Z)
      # find fltk png
      find_library(FLTK_PNG NAMES fltk_png fltkpng)
      if(FLTK_PNG)
        list(APPEND EXTERNAL_LIBRARIES ${FLTK_PNG})
        foreach(DIR ${FLTK_INCLUDE_DIR})
          list(APPEND EXTERNAL_INCLUDES ${DIR}/FL/images ${DIR}/png)
        endforeach(DIR)
      endif(FLTK_PNG)   
    endif(FLTK_FOUND)
  endif(NOT HAVE_FLTK)
elseif(ENABLE_QT)
  find_package(Qt4)
  set(QT_USE_QTOPENGL TRUE)
  include(${QT_USE_FILE})
  if(QT_FOUND)
    add_subdirectory(Qt)
    set_config_option(HAVE_QT "Qt")
    list(APPEND EXTERNAL_INCLUDES ${QT_INCLUDE_DIR})
  endif(QT_FOUND)
endif(ENABLE_FLTK)

if(ENABLE_NATIVE_FILE_CHOOSER)
  set_config_option(HAVE_NATIVE_FILE_CHOOSER "NativeFileChooser")
endif(ENABLE_NATIVE_FILE_CHOOSER)

if(ENABLE_ONELAB2)
  if(ENABLE_UDT)
    find_package(Threads REQUIRED)
    find_path(UDT_INCLUDE_DIR "udt.h" PATH_SUFFIXES include udt)
    find_library(UDT_LIBRARY udt)
    if(UDT_INCLUDE_DIR AND UDT_LIBRARY AND Threads_FOUND)
      set_config_option(HAVE_UDT "UDT")
      list(APPEND EXTERNAL_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
      list(APPEND EXTERNAL_LIBRARIES ${UDT_LIBRARY})
      list(APPEND EXTERNAL_INCLUDES ${UDT_INCLUDE_DIR})
    else(UDT_INCLUDE_DIR AND UDT_LIBRARY AND Threads_FOUND)
      message(FATAL_ERROR "Unable to find UDT library or threads")
    endif(UDT_INCLUDE_DIR AND UDT_LIBRARY AND Threads_FOUND)
  endif(ENABLE_UDT)
  set_config_option(HAVE_ONELAB2 "ONELAB2")
  add_subdirectory(contrib/onelab2)
  include_directories(contrib/onelab2)
endif(ENABLE_ONELAB2)

if(ENABLE_ONELAB)
  set_config_option(HAVE_ONELAB "ONELAB")
  if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/contrib/onelab)
    if(ENABLE_ONELAB_METAMODEL)
      add_subdirectory(contrib/onelab)
      include_directories(contrib/onelab)
      set_config_option(HAVE_ONELAB_METAMODEL "ONELABMetamodel")
    endif(ENABLE_ONELAB_METAMODEL)
    file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/contrib/onelab/python/onelab.py
              DESTINATION ${CMAKE_CURRENT_BINARY_DIR})
  endif(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/contrib/onelab)
endif(ENABLE_ONELAB)

if(ENABLE_BUILD_IOS)
  find_file(CMAKE_TOOLCHAIN_FILE "ios.cmake")
  if(NOT CMAKE_TOOLCHAIN_FILE)
    message(FATAL_ERROR "Cannot compile Gmsh for iOS without a toolchain")
  endif(NOT CMAKE_TOOLCHAIN_FILE)
endif(ENABLE_BUILD_IOS)

if(HAVE_FLTK OR HAVE_QT OR ENABLE_GRAPHICS)
  if(NOT HAVE_MESH OR NOT HAVE_POST OR NOT HAVE_PLUGINS OR NOT HAVE_ONELAB)
    message(SEND_ERROR "Cannot compile GUI without Mesh, Post, Plugin and ONELAB")
  endif(NOT HAVE_MESH OR NOT HAVE_POST OR NOT HAVE_PLUGINS OR NOT HAVE_ONELAB)

  if(FLTK_JPEG)
    set_config_option(HAVE_LIBJPEG "Jpeg(Fltk)")
  else(FLTK_JPEG)
    find_package(JPEG)
    if(JPEG_FOUND)
      set_config_option(HAVE_LIBJPEG "Jpeg")
      list(APPEND EXTERNAL_LIBRARIES ${JPEG_LIBRARIES})
      list(APPEND EXTERNAL_INCLUDES ${JPEG_INCLUDE_DIR})
    endif(JPEG_FOUND)
  endif(FLTK_JPEG)

  if(FLTK_Z)
    set_config_option(HAVE_LIBZ "Zlib(Fltk)")
  else(FLTK_Z)
    find_package(ZLIB)
    if(ZLIB_FOUND)
      set_config_option(HAVE_LIBZ "Zlib")
      list(APPEND EXTERNAL_LIBRARIES ${ZLIB_LIBRARIES})
      list(APPEND EXTERNAL_INCLUDES ${ZLIB_INCLUDE_DIR})
    endif(ZLIB_FOUND)
  endif(FLTK_Z)

  if(HAVE_LIBZ)
    if(FLTK_PNG)
      set_config_option(HAVE_LIBPNG "Png(Fltk)")
    else(FLTK_PNG)
      find_package(PNG)
      if(PNG_FOUND)
        set_config_option(HAVE_LIBPNG "Png")
        list(APPEND EXTERNAL_LIBRARIES ${PNG_LIBRARIES})
        list(APPEND EXTERNAL_INCLUDES ${PNG_INCLUDE_DIR})
      endif(PNG_FOUND)
    endif(FLTK_PNG)
  endif(HAVE_LIBZ)

  if(ENABLE_MPEG_ENCODE)
    add_subdirectory(contrib/mpeg_encode)
    include_directories(contrib/mpeg_encode/headers)
    set_config_option(HAVE_MPEG_ENCODE "Mpeg")
  endif(ENABLE_MPEG_ENCODE)

  if(ENABLE_3M AND EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/contrib/3M)
    add_subdirectory(contrib/3M)
    include_directories(contrib/3M)
    set_config_option(HAVE_3M "3M")
  endif(ENABLE_3M AND EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/contrib/3M)

  if(ENABLE_OSMESA)
    find_library(OSMESA_LIB OSMesa)
    if(OSMESA_LIB)
      set_config_option(HAVE_OSMESA "OSMesa")
      list(APPEND EXTERNAL_LIBRARIES ${OSMESA_LIB})
    endif(OSMESA_LIB)
  endif(ENABLE_OSMESA)

  find_package(OpenGL REQUIRED)
  if(OPENGL_GLU_FOUND)
    add_subdirectory(Graphics)
    set_config_option(HAVE_OPENGL "OpenGL")
  else(OPENGL_GLU_FOUND)
    message(SEND_ERROR "Could not find GLU: disabling OpenGL support")
  endif(OPENGL_GLU_FOUND)
endif(HAVE_FLTK OR HAVE_QT OR ENABLE_GRAPHICS)

if(HAVE_MESH OR HAVE_PLUGINS)
  if(ENABLE_ANN)
    find_library(ANN_LIB ann PATH_SUFFIXES lib)
    find_path(ANN_INC "ANN.h" PATH_SUFFIXES src include ANN)
    if(ANN_LIB AND ANN_INC)
      list(APPEND EXTERNAL_LIBRARIES ${ANN_LIB})
      list(APPEND EXTERNAL_INCLUDES ${ANN_INC})
    else(ANN_LIB AND ANN_INC)
      message(STATUS "System ANN not found: using contrib/ANN instead")
      add_subdirectory(contrib/ANN)
      include_directories(contrib/ANN/include)
    endif(ANN_LIB AND ANN_INC)
    set_config_option(HAVE_ANN "Ann")
  endif(ENABLE_ANN)
endif(HAVE_MESH OR HAVE_PLUGINS)

if(ENABLE_BFGS)
  add_subdirectory(contrib/lbfgs)
  include_directories(contrib/lbfgs)
  set_config_option(HAVE_BFGS "Bfgs")
endif(ENABLE_BFGS)

if(HAVE_FLTK AND ENABLE_CAIRO)
  find_library(CAIRO_LIB cairo)
  find_path(CAIRO_INC "cairo/cairo.h" PATH_SUFFIXES include)
  if(CAIRO_INC AND CAIRO_LIB)
     set_config_option(HAVE_CAIRO "Cairo")
     list(APPEND EXTERNAL_LIBRARIES ${CAIRO_LIB})
     list(APPEND EXTERNAL_INCLUDES ${CAIRO_INC})
  endif(CAIRO_INC AND CAIRO_LIB)
endif(HAVE_FLTK AND ENABLE_CAIRO)

if(ENABLE_DINTEGRATION)
  add_subdirectory(contrib/DiscreteIntegration)
  include_directories(contrib/DiscreteIntegration)
  set_config_option(HAVE_DINTEGRATION "DIntegration")
endif(ENABLE_DINTEGRATION)

if(ENABLE_OPTHOM)
  add_subdirectory(contrib/HighOrderMeshOptimizer)
  include_directories(contrib/HighOrderMeshOptimizer)
  add_subdirectory(contrib/MeshOptimizer)
  include_directories(contrib/MeshOptimizer)
  add_subdirectory(contrib/MeshQualityOptimizer)
  include_directories(contrib/MeshQualityOptimizer)
  set_config_option(HAVE_OPTHOM "OptHom")
endif(ENABLE_OPTHOM)

if(ENABLE_KBIPACK)
  set_config_option(HAVE_KBIPACK "Kbipack")
  add_subdirectory(contrib/kbipack)
  include_directories(contrib/kbipack)
  find_library(GMP_LIB gmp)
  find_path(GMP_INC "gmp.h" PATH_SUFFIXES src include)
  if(GMP_LIB AND GMP_INC)
    set_config_option(HAVE_GMP "GMP")
    list(APPEND EXTERNAL_LIBRARIES ${GMP_LIB})
    list(APPEND EXTERNAL_INCLUDES ${GMP_INC})
  else(GMP_LIB AND GMP_INC)
    message(STATUS "GMP not found: Kbipack uses long int")
  endif(GMP_LIB AND GMP_INC)
endif(ENABLE_KBIPACK)

if(ENABLE_MATHEX)
  add_subdirectory(contrib/MathEx)
  include_directories(contrib/MathEx)
  set_config_option(HAVE_MATHEX "MathEx")
endif(ENABLE_MATHEX)

if(ENABLE_MPI)
  find_package(MPI)
  if(MPI_FOUND)
    set_config_option(HAVE_MPI "MPI")
    list(APPEND EXTERNAL_INCLUDES ${MPI_INCLUDE_DIR})
    list(APPEND EXTERNAL_LIBRARIES ${MPI_LIBRARIES})
    include(CMakeForceCompiler)
    # Warning: this actually requires cmake >= 2.8.5
    cmake_force_c_compiler(${MPI_C_COMPILER} "MPI C Compiler")
    cmake_force_cxx_compiler(${MPI_CXX_COMPILER} "MPI C++ Compiler")
  endif(MPI_FOUND)
endif(ENABLE_MPI)

if(ENABLE_POPPLER)
  find_library(POPPLER_LIB poppler)
  find_library(POPPLER_CPP_LIB poppler-cpp)
  find_path(POPPLER_INC "poppler/cpp/poppler-document.h" PATH_SUFFIXES src include)
  if(POPPLER_LIB AND POPPLER_INC)
    set_config_option(HAVE_POPPLER "Poppler")
    list(APPEND EXTERNAL_LIBRARIES ${POPPLER_LIB})
    list(APPEND EXTERNAL_LIBRARIES ${POPPLER_CPP_LIB})
    list(APPEND EXTERNAL_INCLUDES ${POPPLER_INC})
  endif(POPPLER_LIB AND POPPLER_INC)
endif(ENABLE_POPPLER)

if(HAVE_MESH OR HAVE_SOLVER)
  if(ENABLE_METIS)
    # Gmsh currently uses Metis 4 - we should switch to Metis 5 and use the
    # system lib if available
    add_subdirectory(contrib/Metis)
    include_directories(contrib/Metis)
    set_config_option(HAVE_METIS "Metis")
    message(STATUS "Note: By including Metis you have to comply with Metis' "
            "special licensing requirements stated in contrib/Metis/README.txt.")
  endif(ENABLE_METIS)

  if(ENABLE_CHACO)
    add_subdirectory(contrib/Chaco)
    include_directories(contrib/Chaco/main)
    set_config_option(HAVE_CHACO "Chaco")
  endif(ENABLE_CHACO)
endif(HAVE_MESH OR HAVE_SOLVER)

if(HAVE_MESH)
  if(ENABLE_VORO3D)
    add_subdirectory(contrib/voro++)
    include_directories(contrib/voro++/src)
    set_config_option(HAVE_VORO3D "Voro3D")
  endif(ENABLE_VORO3D)

  if(ENABLE_BLOSSOM)
    add_subdirectory(contrib/blossom)
    include_directories(contrib/blossom/MATCH contrib/blossom/concorde97
                        contrib/blossom/concorde97/INCLUDE)
    set_config_option(HAVE_BLOSSOM "Blossom")
  endif(ENABLE_BLOSSOM)

  if(ENABLE_NETGEN)
    add_subdirectory(contrib/Netgen)
    include_directories(contrib/Netgen contrib/Netgen/libsrc/include 
                        contrib/Netgen/nglib)
    set_config_option(HAVE_NETGEN "Netgen")
    add_definitions(-DNO_PARALLEL_THREADS -DNOTCL)
  endif(ENABLE_NETGEN)

  if(ENABLE_BAMG)
    add_subdirectory(contrib/bamg)
    include_directories(contrib/bamg contrib/bamg/bamglib)
    set_config_option(HAVE_BAMG "Bamg")
  endif(ENABLE_BAMG)

  if(ENABLE_MMG3D)
    find_library(MMG3D_LIB mmg3dlib4.0 PATH_SUFFIXES lib)
    find_path(MMG3D_INC "libmmg3d.h" PATH_SUFFIXES src include)
    if(MMG3D_LIB AND MMG3D_INC)
       list(APPEND EXTERNAL_LIBRARIES ${MMG3D_LIB})
       list(APPEND EXTERNAL_INCLUDES ${MMG3D_INC})
    else(MMG3D_LIB AND MMG3D_INC)
       message(STATUS "System MMG3D not found: using contrib/mmg3d instead")
       add_subdirectory(contrib/mmg3d)
       include_directories(contrib/mmg3d/build/sources)
    endif(MMG3D_LIB AND MMG3D_INC)
    set_config_option(HAVE_MMG3D "Mmg3d")
  endif(ENABLE_MMG3D)

  if(ENABLE_TETGEN AND EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/contrib/Tetgen1.5/tetgen.h)
    add_subdirectory(contrib/Tetgen1.5)
    include_directories(contrib/Tetgen1.5)
    set_config_option(HAVE_TETGEN "Tetgen(1.5)")
    add_definitions(-DTETLIBRARY)
  elseif(ENABLE_TETGEN_OLD AND EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/contrib/Tetgen1.4/tetgen.h)
    add_subdirectory(contrib/Tetgen1.4)
    include_directories(contrib/Tetgen1.4)
    set_config_option(HAVE_TETGEN "Tetgen(1.4)")
    add_definitions(-DTETLIBRARY)
  elseif(ENABLE_TETGEN)
    find_library(TETGEN_LIB tet PATH_SUFFIXES lib)
    find_path(TETGEN_INC "tetgen.h" PATH_SUFFIXES src include tetgen)
    if(TETGEN_LIB AND TETGEN_INC)
      list(APPEND EXTERNAL_LIBRARIES ${TETGEN_LIB})
      list(APPEND EXTERNAL_INCLUDES ${TETGEN_INC})
      set_config_option(HAVE_TETGEN "Tetgen")
    endif(TETGEN_LIB AND TETGEN_INC)
  endif(ENABLE_TETGEN AND EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/contrib/Tetgen1.5/tetgen.h)
  if(HAVE_TETGEN)
    message(STATUS "Note: By including Tetgen you have to comply with Tetgen's "
            "special licensing requirements stated in contrib/Tetgen*/LICENSE.")
  endif(HAVE_TETGEN)
endif(HAVE_MESH)

if(ENABLE_FOURIER_MODEL)
  set(FM_REQUIRED FourierModel fftw3 gsl gslcblas)
  find_all_libraries(FM_LIBS FM_REQUIRED "" lib)
  if(FM_LIBS)
    set_config_option(HAVE_FOURIER_MODEL "FourierModel")
    list(APPEND EXTERNAL_LIBRARIES ${FM_LIBS})
  endif(FM_LIBS)
endif(ENABLE_FOURIER_MODEL)

if(ENABLE_MED OR ENABLE_CGNS)
  find_library(HDF5_LIB hdf5)
  if(HDF5_LIB)
    if(ENABLE_MED)
      find_library(MED_LIB med)
      if(MED_LIB)
        set_config_option(HAVE_MED "Med")
        list(APPEND EXTERNAL_LIBRARIES ${MED_LIB})
      endif(MED_LIB)
    endif(ENABLE_MED)    
    if(ENABLE_CGNS)
      find_library(CGNS_LIB cgns PATHS ENV CGNS_ROOT PATH_SUFFIXES lib)
      find_path(CGNS_INC "cgnslib.h" PATHS ENV CGNS_ROOT PATH_SUFFIXES include)
      if(CGNS_LIB AND CGNS_INC)
        set_config_option(HAVE_LIBCGNS "Cgns")
        list(APPEND EXTERNAL_LIBRARIES ${CGNS_LIB})
        list(APPEND EXTERNAL_INCLUDES ${CGNS_INC})
      endif(CGNS_LIB AND CGNS_INC)
    endif(ENABLE_CGNS)    
    if(MED_LIB OR CGNS_LIB)
      list(APPEND EXTERNAL_LIBRARIES ${HDF5_LIB})
      find_library(SZ_LIB NAMES szlib sz)
      if(SZ_LIB)
        list(APPEND EXTERNAL_LIBRARIES ${SZ_LIB})
      endif(SZ_LIB)
      if(NOT HAVE_LIBZ) # necessary for non-GUI builds
        find_package(ZLIB)
        if(ZLIB_FOUND)
          set_config_option(HAVE_LIBZ "Zlib")
          list(APPEND EXTERNAL_LIBRARIES ${ZLIB_LIBRARIES})
        endif(ZLIB_FOUND)
      endif(NOT HAVE_LIBZ)
    endif(MED_LIB OR CGNS_LIB)
  else(HDF5_LIB)
    message(STATUS "HDF5 not found")
  endif(HDF5_LIB)
endif(ENABLE_MED OR ENABLE_CGNS)

if(HAVE_SOLVER)
  if(ENABLE_GMM)
    find_path(GMM_INC "gmm.h" PATH_SUFFIXES src include include/gmm)
    if(GMM_INC)
      list(APPEND EXTERNAL_INCLUDES ${GMM_INC})
    else(GMM_INC)
      message(STATUS "System GMM not found: using contrib/gmm instead")
      include_directories(contrib/gmm)
    endif(GMM_INC)
    set_config_option(HAVE_GMM "Gmm")
  endif(ENABLE_GMM)

  if(ENABLE_TAUCS)
    if(HAVE_METIS)
      find_library(TAUCS_LIB taucs PATH_SUFFIXES lib)
      find_path(TAUCS_INC "taucs.h" PATH_SUFFIXES src include taucs)
      if(TAUCS_LIB AND TAUCS_INC)
        set_config_option(HAVE_TAUCS "Taucs")
        add_definitions(-DTAUCS_CILK)
        list(APPEND EXTERNAL_LIBRARIES ${TAUCS_LIB})
        list(APPEND EXTERNAL_INCLUDES ${TAUCS_INC})
      endif(TAUCS_LIB AND TAUCS_INC)
    else(HAVE_METIS)
      message(STATUS "Warning: Disabling Taucs (requires METIS)")
    endif(HAVE_METIS)
  endif(ENABLE_TAUCS)

  if(ENABLE_MUMPS)
    set(MUMPS_LIBS_REQUIRED smumps dmumps cmumps zmumps mumps_common pord metis)
    if(NOT ENABLE_MPI)
      list(APPEND MUMPS_LIBS_REQUIRED mpiseq)
    endif(NOT ENABLE_MPI)
    find_all_libraries(MUMPS_LIBRARIES MUMPS_LIBS_REQUIRED "" "lib")
    find_path(SMUMPS_INC "smumps_c.h" PATH_SUFFIXES src include)
    find_path(DMUMPS_INC "dmumps_c.h" PATH_SUFFIXES src include)
    find_path(CMUMPS_INC "cmumps_c.h" PATH_SUFFIXES src include)
    find_path(ZMUMPS_INC "zmumps_c.h" PATH_SUFFIXES src include)
    if(MUMPS_LIBRARIES AND SMUMPS_INC AND DMUMPS_INC AND CMUMPS_INC AND ZMUMPS_INC)
      set_config_option(HAVE_MUMPS "MUMPS")
      list(APPEND EXTERNAL_LIBRARIES ${MUMPS_LIBRARIES})
      list(APPEND EXTERNAL_INCLUDES ${SMUMPS_INC})
      list(APPEND EXTERNAL_INCLUDES ${DMUMPS_INC})
      list(APPEND EXTERNAL_INCLUDES ${CMUMPS_INC})
      list(APPEND EXTERNAL_INCLUDES ${ZMUMPS_INC})
      find_library(GFORTRAN_LIB gfortran)
      if(GFORTRAN_LIB)
        list(APPEND EXTERNAL_LIBRARIES ${GFORTRAN_LIB})
      endif(GFORTRAN_LIB)
      if(ENABLE_GMM) # use GMM/MUMPS interface
        add_definitions(-DGMM_USES_MUMPS)
      endif(ENABLE_GMM)
    endif(MUMPS_LIBRARIES AND SMUMPS_INC AND DMUMPS_INC AND CMUMPS_INC AND ZMUMPS_INC)
  endif(ENABLE_MUMPS)

  if(ENABLE_PETSC)
    if(PETSC_DIR)
      set(ENV_PETSC_DIR ${PETSC_DIR})
    else(PETSC_DIR)
      set(ENV_PETSC_DIR $ENV{PETSC_DIR})
    endif(PETSC_DIR)
    if(PETSC_ARCH)
      set(ENV_PETSC_ARCH ${PETSC_ARCH})
    else(PETSC_ARCH)
      set(ENV_PETSC_ARCH $ENV{PETSC_ARCH})
    endif(PETSC_ARCH)
    if(EXISTS ${ENV_PETSC_DIR}/${ENV_PETSC_ARCH}/conf/petscvariables)
      # old-style PETSc installations (using PETSC_DIR and PETSC_ARCH)
      message(STATUS "Using PETSc dir: ${ENV_PETSC_DIR}")
      message(STATUS "Using PETSc arch: ${ENV_PETSC_ARCH}")
      # find includes by parsing the petscvariables file
      file(STRINGS ${ENV_PETSC_DIR}/${ENV_PETSC_ARCH}/conf/petscvariables 
           PETSC_VARIABLES NEWLINE_CONSUME)
    endif(EXISTS ${ENV_PETSC_DIR}/${ENV_PETSC_ARCH}/conf/petscvariables)
    if(EXISTS ${ENV_PETSC_DIR}/${ENV_PETSC_ARCH}/lib/petsc-conf/petscvariables)
      # old-style PETSc installations (using PETSC_DIR and PETSC_ARCH)
      message(STATUS "Using PETSc dir: ${ENV_PETSC_DIR}")
      message(STATUS "Using PETSc arch: ${ENV_PETSC_ARCH}")
      # find includes by parsing the petscvariables file
      file(STRINGS ${ENV_PETSC_DIR}/${ENV_PETSC_ARCH}/lib/petsc-conf/petscvariables 
           PETSC_VARIABLES NEWLINE_CONSUME)
    endif(EXISTS ${ENV_PETSC_DIR}/${ENV_PETSC_ARCH}/lib/petsc-conf/petscvariables)
    if(PETSC_VARIABLES)
      # try to find PETSC_CC_INCLUDES for PETSc >= 3.4
      string(REGEX MATCH "PETSC_CC_INCLUDES = [^\n\r]*" PETSC_PACKAGES_INCLUDES
             ${PETSC_VARIABLES})
      if(PETSC_PACKAGES_INCLUDES)
        string(REPLACE "PETSC_CC_INCLUDES = " "" PETSC_PACKAGES_INCLUDES
               ${PETSC_PACKAGES_INCLUDES})
      else(PETSC_PACKAGES_INCLUDES)
        # try to find PETSC_PACKAGES_INCLUDES in older versions
        list(APPEND EXTERNAL_INCLUDES ${ENV_PETSC_DIR}/include)
        list(APPEND EXTERNAL_INCLUDES ${ENV_PETSC_DIR}/${ENV_PETSC_ARCH}/include)
        string(REGEX MATCH "PACKAGES_INCLUDES = [^\n\r]*" PETSC_PACKAGES_INCLUDES
               ${PETSC_VARIABLES})
        string(REPLACE "PACKAGES_INCLUDES = " "" PETSC_PACKAGES_INCLUDES
               ${PETSC_PACKAGES_INCLUDES})
      endif(PETSC_PACKAGES_INCLUDES)
      if(PETSC_PACKAGES_INCLUDES)
        if(PETSC_PACKAGES_INCLUDES)
          string(REPLACE "-I" "" PETSC_PACKAGES_INCLUDES ${PETSC_PACKAGES_INCLUDES})
          string(REPLACE " " ";" PETSC_PACKAGES_INCLUDES ${PETSC_PACKAGES_INCLUDES})
          foreach(VAR ${PETSC_PACKAGES_INCLUDES})
            # seem to include unexisting directories (/usr/include/lib64)
	    # check to avoid warnings
	    if(EXISTS ${VAR})
	      list(APPEND EXTERNAL_INCLUDES ${VAR})
            endif(EXISTS ${VAR})
          endforeach(VAR)
        endif(PETSC_PACKAGES_INCLUDES)
      endif(PETSC_PACKAGES_INCLUDES)
      # find libraries (<= 3.0)
      set(PETSC_LIBS_REQUIRED petscksp petscdm petscmat petscvec petsc)
      find_all_libraries(PETSC_LIBS PETSC_LIBS_REQUIRED 
                         ${ENV_PETSC_DIR}/${ENV_PETSC_ARCH}/lib "")
      # petsc 3.1 creates only one library (libpetsc)
      if(NOT PETSC_LIBS)
        find_library(PETSC_LIBS petsc PATHS ${ENV_PETSC_DIR}/${ENV_PETSC_ARCH}/lib)
      endif(NOT PETSC_LIBS)
      if(PETSC_LIBS)
        set_config_option(HAVE_PETSC "PETSc")
	if(NOT HAVE_BLAS)
          set_config_option(HAVE_BLAS "Blas(PETSc)")
        endif(NOT HAVE_BLAS)
	if(NOT HAVE_LAPACK)
          set_config_option(HAVE_LAPACK "Lapack(PETSc)")
        endif(NOT HAVE_LAPACK)
      endif(PETSC_LIBS)
      # find slepc (needs to be linked in before petsc)
      if(ENABLE_SLEPC)