CMake: Add External projects to fetch and install some dependencies automatically on Windows and MacOS

.gitlab-ci.yml

@@ -16,9 +16,8 @@ stages:
   before_script:
     - "echo off"
     - 'call "%VS140COMNTOOLS%\..\..\VC\bin\vcvars32.bat"'
-    - set EXT_LIBS=C:\external_libs\x86
     - set CMAKE_GENERATOR=Visual Studio 14 2015
-    - set INSTALL_DIR=C:/install32_%CI_BUILD_REF_NAME%
+    - set INSTALL_DIR=C:/install32_%CI_BUILD_REF_NAME%/
     - set NETGENDIR=C:\install32_%CI_BUILD_REF_NAME%\bin
     - set PYTHONPATH=C:\install32_%CI_BUILD_REF_NAME%\lib\site-packages
     - set PYTHON_LIB=C:/Python3.5_32/libs/python35.lib
@@ -31,9 +30,8 @@ stages:
   before_script:
     - "echo off"
     - 'call "%VS140COMNTOOLS%\..\..\VC\bin\amd64\vcvars64.bat"'
-    - set EXT_LIBS=C:\external_libs\x64
     - set CMAKE_GENERATOR=Visual Studio 14 2015 Win64
-    - set INSTALL_DIR=C:/install64_%CI_BUILD_REF_NAME%
+    - set INSTALL_DIR=C:/install64_%CI_BUILD_REF_NAME%/
     - set NETGENDIR=C:\install64_%CI_BUILD_REF_NAME%\bin
     - set PYTHONPATH=C:\install64_%CI_BUILD_REF_NAME%\lib\site-packages
     - set PYTHON_LIB=C:/Python3.5/libs/python35.lib
@@ -72,12 +70,11 @@ stages:
     - RD /S /Q CMakeFiles
     - >-
         cmake ..\
-        -DADDITIONAL_PATHS="%EXT_LIBS%\ext_libs;%EXT_LIBS%\occ"
         %PYTHON_CONFIG%
         -G"%CMAKE_GENERATOR%"
         -DINSTALL_DIR="%INSTALL_DIR%"
         -DUSE_OCC=ON
-        -DCMAKE_CXX_FLAGS_RELEASE="/W0"
+        -DCMAKE_BUILD_TYPE=Release
     - cmake --build . --target INSTALL --config Release
 
 build_netgen_win32:
@@ -126,6 +123,7 @@ build_ubuntu_1604:
   stage: test
   script:
     - cd build
+    - cd netgen
     - ctest -C Release -V
 
 # skip since we have no machine with 32 bits
@@ -151,7 +149,7 @@ test_netgen_win64:
 .template_test_linux: &test_linux
   stage: test
   script:
-    - docker run netgen_${CI_BUILD_REF_NAME}_installed:${UBUNTU_VERSION} bash -c 'cd /root/build/netgen && make test ARGS="-V"'
+    - docker run netgen_${CI_BUILD_REF_NAME}_installed:${UBUNTU_VERSION} bash -c 'cd /root/build/netgen && make test_netgen ARGS="-V"'
 
 test_ubuntu_1510:
   <<: *ubuntu_1510

CMakeLists.txt

@@ -3,21 +3,12 @@ if(NOT CMAKE_BUILD_TYPE)
 endif(NOT CMAKE_BUILD_TYPE)
 
 cmake_minimum_required(VERSION 2.8.9)
-project(Netgen)
-set(NETGEN_VERSION_MAJOR 6)
-set(NETGEN_VERSION_MINOR 2)
-string(TIMESTAMP NETGEN_VERSION_PATCH "%y%U%w" )
-set(NETGEN_VERSION "${NETGEN_VERSION_MAJOR}.${NETGEN_VERSION_MINOR}-dev")
-set(PACKAGE_VERSION "${NETGEN_VERSION_MAJOR}.${NETGEN_VERSION_MINOR}-${NETGEN_VERSION_PATCH}")
-set(CPACK_PACKAGE_VERSION "${PACKAGE_VERSION}")
-# set(CPACK_DEBIAN_PACKAGE_VERSION "${PACKAGE_VERSION}"
-
 if(NOT WIN32)
     option( USE_NATIVE_ARCH  "build which -march=native" ON)
 endif(NOT WIN32)
 
 option( USE_GUI     "don't build netgen with GUI" ON )
-option( USE_PYTHON  "link boost python, necessary for ngsolve" ON )
+option( USE_PYTHON  "build with python interface" ON )
 option( USE_MPI     "enable mpi parallelization" OFF )
 option( USE_OCC     "(not supported) compile with OpenCascade geometry kernel" OFF)
 option( USE_JPEG    "enable snapshots using library libjpeg" OFF )
@@ -27,6 +18,26 @@ option( INSTALL_PROFILES "install environment variable settings to /etc/profile.
 option( INSTALL_DEPENDENCIES "install dependencies like tcl, useful for packaging" OFF )
 option( USE_CCACHE       "use ccache")
 
+option( USE_SUPERBUILD       "use ccache" ON)
+
+if (USE_SUPERBUILD)
+  project (SUPERBUILD)
+  # execute the superbuild (this script will be invoked again without the
+  # USE_SUPERBUILD option this time)
+  include (cmake_modules/SuperBuild.cmake)
+  return()                      # stop processing this file further
+else()
+  project(Netgen)
+endif()
+
+set(NETGEN_VERSION_MAJOR 6)
+set(NETGEN_VERSION_MINOR 2)
+string(TIMESTAMP NETGEN_VERSION_PATCH "%y%U%w" )
+set(NETGEN_VERSION "${NETGEN_VERSION_MAJOR}.${NETGEN_VERSION_MINOR}-dev")
+set(PACKAGE_VERSION "${NETGEN_VERSION_MAJOR}.${NETGEN_VERSION_MINOR}-${NETGEN_VERSION_PATCH}")
+set(CPACK_PACKAGE_VERSION "${PACKAGE_VERSION}")
+# set(CPACK_DEBIAN_PACKAGE_VERSION "${PACKAGE_VERSION}"
+
 
 #######################################################################
 if(USE_CCACHE)
@@ -146,19 +157,17 @@ if(APPLE)
 endif(APPLE)
 
 #######################################################################
-find_package(ZLIB REQUIRED)
+if(NOT ZLIB_INCLUDE_DIRS)
+  find_package(ZLIB REQUIRED)
+endif(NOT ZLIB_INCLUDE_DIRS)
 include_directories(${ZLIB_INCLUDE_DIRS})
 
 #######################################################################
 if (USE_GUI)
-    find_package(TCL 8.5)
+    find_package(TCL 8.5 REQUIRED)
     find_package(Threads REQUIRED)
     if(APPLE)
-#           find_library(OPENGL_gl_LIBRARY AppKit REQUIRED)
-#           find_library(OPENGL_gl_LIBRARY OpenGL REQUIRED)
-#          find_package(AppKit REQUIRED) 
           set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -framework AppKit")
-          message("linker flags: ${CMAKE_EXE_LINKER_FLAGS}")
     else(APPLE)
           find_package(X11 REQUIRED) 
     endif(APPLE)
@@ -170,10 +179,6 @@ if (USE_GUI)
     set(LIBTOGL togl)
 
     if(WIN32)
-        get_filename_component(MY_LIB_DIR ${TK_LIBRARY} DIRECTORY)
-        install( DIRECTORY "${MY_LIB_DIR}/tcl8.6"   DESTINATION lib COMPONENT netgen )
-        install( DIRECTORY "${MY_LIB_DIR}/tk8.6"    DESTINATION lib COMPONENT netgen )
-        install( DIRECTORY "${MY_LIB_DIR}/../bin" DESTINATION . COMPONENT netgen )
         add_definitions(-DTOGL_WGL)
     else(WIN32)
         if(APPLE)
@@ -186,36 +191,13 @@ endif (USE_GUI)
 
 #######################################################################
 if (USE_PYTHON)
-    find_path(PYBIND_INCLUDE_DIR pybind11/pybind11.h ${CMAKE_CURRENT_SOURCE_DIR}/external_dependencies/pybind11/include)
-    if( NOT PYBIND_INCLUDE_DIR )
-      execute_process(COMMAND git submodule update --init --recursive WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
-        find_path(PYBIND_INCLUDE_DIR pybind11/pybind11.h ${CMAKE_CURRENT_SOURCE_DIR}/external_dependencies/pybind11/include)
-    endif( NOT PYBIND_INCLUDE_DIR )
-    if( PYBIND_INCLUDE_DIR )
-        message("-- Found Pybind11: ${PYBIND_INCLUDE_DIR}")
-    else( PYBIND_INCLUDE_DIR )
-        message(FATAL_ERROR "Could NOT find pybind11!")
-    endif( PYBIND_INCLUDE_DIR )
-    include_directories(${PYBIND_INCLUDE_DIR})
-    set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH}" "${PROJECT_SOURCE_DIR}/cmake_modules/python")
-    set(PYTHON_VERSION "3" CACHE STRING "")
-    set(Python_ADDITIONAL_VERSIONS 3.5)
-    if( PYTHON_VERSION VERSION_LESS 3 )
-        message(FATAL_ERROR "NGSolve supports only Python 3")
-    endif( PYTHON_VERSION VERSION_LESS 3 )
-    if( PYTHON_VERSION STREQUAL "3")
-        find_package(PythonInterp ${PYTHON_VERSION} REQUIRED)
-        find_package(PythonLibs ${PYTHON_VERSION}  REQUIRED)
-    else( PYTHON_VERSION STREQUAL "3")
-        find_package(PythonInterp ${PYTHON_VERSION} EXACT REQUIRED)
-        find_package(PythonLibs ${PYTHON_VERSION}  EXACT REQUIRED)
-    endif( PYTHON_VERSION STREQUAL "3")
-
     add_definitions(-DNG_PYTHON)
-    include_directories(${PYTHON_INCLUDE_DIRS})
+
-    set(PYTHON_LIBS "${PYTHON_LIBRARIES}")
+    include_directories(${PYBIND_INCLUDE_DIR})
-    execute_process(COMMAND ${PYTHON_EXECUTABLE} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib(1,0,''))" OUTPUT_VARIABLE PYTHON_PACKAGES_INSTALL_DIR OUTPUT_STRIP_TRAILING_WHITESPACE)
+    include_directories(${PYTHON_INCLUDE_DIR})
-    message("python install path: ${PYTHON_PACKAGES_INSTALL_DIR}")
+
+    install(DIRECTORY ${PYBIND_INCLUDE_DIR}/pybind11 DESTINATION include COMPONENT netgen_devel)
+    install(FILES ${PYBIND_INCLUDE_DIR}/../LICENSE DESTINATION include/pybind11 COMPONENT netgen_devel)
 endif (USE_PYTHON)
 
 #######################################################################
@@ -232,10 +214,6 @@ if (USE_OCC)
     find_package(OpenCasCade REQUIRED)
     add_definitions(-DOCCGEOMETRY -D_OCC64)
     include_directories(${OCC_INCLUDE_DIR})
-    if(WIN32)
-        install( DIRECTORY "${OCC_LIBRARY_DIR}/../bin" DESTINATION . COMPONENT netgen )
-        install( FILES ${OCC_LIBRARIES_BIN} DESTINATION bin COMPONENT netgen )
-    endif(WIN32)
 endif (USE_OCC)
 
 #######################################################################
@@ -417,6 +395,10 @@ configure_file(
 add_custom_target(uninstall
     COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake)
 
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/cmake_modules/NetgenConfig.cmake.in
+	${CMAKE_CURRENT_BINARY_DIR}/NetgenConfig.cmake @ONLY)
+
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/NetgenConfig.cmake DESTINATION share/cmake)
 
 #######################################################################
 # Configure message

cmake_modules/ExternalProject_TCLTK.cmake

@@ -0,0 +1,69 @@
+if(APPLE)
+  set(HOME $ENV{HOME})
+  ExternalProject_Add(tcl
+    URL "http://sourceforge.net/projects/tcl/files/Tcl/8.6.4/tcl8.6.4-src.tar.gz"
+    UPDATE_COMMAND "" # Disable update
+    BUILD_IN_SOURCE 1
+    CONFIGURE_COMMAND ""
+    BUILD_COMMAND make -C macosx install INSTALL_ROOT=${HOME}/ NATIVE_TCLSH=${HOME}/usr/local/bin/tclsh
+    INSTALL_COMMAND ""
+    LOG_DOWNLOAD 1
+    LOG_BUILD 1
+    LOG_INSTALL 1
+    )
+
+  ExternalProject_Add(tk
+    DEPENDS tcl
+    URL "http://sourceforge.net/projects/tcl/files/Tcl/8.6.4/tk8.6.4-src.tar.gz"
+    UPDATE_COMMAND "" # Disable update
+    BUILD_IN_SOURCE 1
+    CONFIGURE_COMMAND ""
+    BUILD_COMMAND make -C macosx install INSTALL_ROOT=${HOME}/
+    INSTALL_COMMAND ""#make -C macosx install
+    LOG_DOWNLOAD 1
+    LOG_BUILD 1
+    LOG_INSTALL 1
+    )
+
+  ExternalProject_Add(tkdnd
+    DEPENDS tcl tk
+    URL "http://sourceforge.net/projects/tkdnd/files/TkDND/TkDND%202.8/tkdnd2.8-src.tar.gz"
+    PATCH_COMMAND  patch -p1 < ${CMAKE_CURRENT_LIST_DIR}/tkdnd_macosx.patch
+    UPDATE_COMMAND "" # Disable update
+    BUILD_IN_SOURCE 1
+    CONFIGURE_COMMAND ./configure --libdir=${HOME}/Library/Tcl --with-tcl=${HOME}/Library/Frameworks/Tcl.framework --with-tk=${HOME}/Library/Frameworks/Tk.framework --prefix=${HOME}
+    BUILD_COMMAND make
+    INSTALL_COMMAND make install
+    LOG_DOWNLOAD 1
+    LOG_CONFIGURE 1
+    LOG_BUILD 1
+    LOG_INSTALL 1
+    )
+
+  list(APPEND NETGEN_DEPENDENCIES tcl tk tkdnd)
+  set(TCL_INCLUDE_PATH ${HOME}/Library/Frameworks/Tcl.framework/Headers)
+  set(TCL_LIBRARY ${HOME}/Library/Frameworks/Tcl.framework)
+  set(TK_LIBRARY ${HOME}/Library/Frameworks/Tk.framework)
+  set(TK_INCLUDE_PATH ${HOME}/Library/Frameworks/Tk.framework/Headers)
+  set(TCL_TCLSH ${HOME}/usr/local/bin/tclsh)
+  set(TK_WISH ${HOME}/usr/local/bin/wish)
+
+elseif(WIN32)
+
+  ExternalProject_Add(win_extlibs
+    URL ${EXT_LIBS_DOWNLOAD_URL_WIN}
+    UPDATE_COMMAND "" # Disable update
+    BUILD_IN_SOURCE 1
+    CONFIGURE_COMMAND ""
+    BUILD_COMMAND ""
+    INSTALL_COMMAND ${CMAKE_COMMAND} -E copy_directory . ${INSTALL_DIR}
+    LOG_DOWNLOAD 1
+    )
+
+  list(APPEND NETGEN_DEPENDENCIES win_extlibs)
+else(WIN32)
+    find_package(TCL 8.5 REQUIRED)
+endif(APPLE)
+
+# Propagate settings to Netgen subproject
+set_vars(NETGEN_CMAKE_ARGS TCL_INCLUDE_PATH TCL_LIBRARY TK_LIBRARY TK_INCLUDE_PATH TCL_TCLSH TK_WISH)

cmake_modules/NetgenConfig.cmake.in

@@ -0,0 +1,59 @@
+set(PACKAGE_VERSION "@NETGEN_VERSION@")
+set(NETGEN_DIR "@CMAKE_INSTALL_PREFIX@")
+
+set(NETGEN_INCLUDE_DIR "@CMAKE_INSTALL_PREFIX@/include")
+set(NETGEN_SOURCE_DIR "@PROJECT_SOURCE_DIR@")
+
+set(CMAKE_THREAD_LIBS_INIT "@CMAKE_THREAD_LIBS_INIT@")
+set(FFMPEG_LIBRARIES "@FFMPEG_LIBRARIES@")
+set(JPEG_INCLUDE_DIR "@JPEG_INCLUDE_DIR@")
+set(JPEG_LIBRARIES "@JPEG_LIBRARIES@")
+set(LIBTOGL "@LIBTOGL@")
+set(METIS_INCLUDE_DIR "@METIS_INCLUDE_DIR@")
+set(METIS_LIBRARY "@METIS_LIBRARY@")
+set(MKL_LIBRARIES "@MKL_LIBRARIES@")
+set(MPI_CXX_INCLUDE_PATH "@MPI_CXX_INCLUDE_PATH@")
+set(MPI_CXX_LIBRARIES "@MPI_CXX_LIBRARIES@")
+set(NETGEN_INCLUDE_DIRS "@PROJECT_SOURCE_DIR@/libsrc/include;@PROJECT_SOURCE_DIR@/libsrc/general;@PROJECT_SOURCE_DIR@/libsrc/visualization")
+set(OCC_INCLUDE_DIR "@OCC_INCLUDE_DIR@")
+set(OCC_LIBRARIES_BIN "@OCC_LIBRARIES_BIN@")
+set(OCC_LIBRARIES "@OCC_LIBRARIES@")
+set(OCC_LIBRARY_DIR "@OCC_LIBRARY_DIR@")
+set(OPENGL_LIBRARIES "@OPENGL_LIBRARIES@")
+set(PYBIND_INCLUDE_DIR "@CMAKE_INSTALL_PREFIX@/include")
+set(PYTHON_INCLUDE_DIRS "@PYTHON_INCLUDE_DIRS@")
+set(PYTHON_LIBRARIES "@PYTHON_LIBRARIES@")
+set(PYTHON_LIBS "@PYTHON_LIBS@")
+set(PYTHON_PACKAGES_INSTALL_DIR  "@PYTHON_PACKAGES_INSTALL_DIR@")
+set(TCL_INCLUDE_PATH "@TCL_INCLUDE_PATH@")
+set(TCL_LIBRARY "@TCL_LIBRARY@")
+set(TK_DND_LIBRARY "@TK_DND_LIBRARY@")
+set(TK_INCLUDE_PATH "@TK_INCLUDE_PATH@")
+set(TK_LIBRARY "@TK_LIBRARY@")
+set(X11_X11_LIB "@X11_X11_LIB@")
+set(X11_Xmu_LIB "@X11_Xmu_LIB@")
+set(ZLIB_INCLUDE_DIRS "@ZLIB_INCLUDE_DIRS@")
+set(ZLIB_LIBRARIES "@ZLIB_LIBRARIES@")
+
+set(USE_GUI @USE_GUI@)
+set(USE_PYTHON @USE_PYTHON@)
+set(USE_MPI @USE_MPI@)
+set(USE_OCC @USE_OCC@)
+set(USE_JPEG @USE_JPEG@)
+set(USE_MPEG @USE_MPEG@)
+set(NETGEN_INTEL_MIC @INTEL_MIC@)
+set(NETGEN_INSTALL_PROFILES @INSTALL_PROFILES@)
+set(NETGEN_INSTALL_DEPENDENCIES @INSTALL_DEPENDENCIES@)
+set(USE_CCACHE @USE_CCACHE@)
+
+if(@USE_GUI@)
+  find_package(TCL 8.5 REQUIRED)
+endif(@USE_GUI@)
+
+if(@USE_PYTHON@)
+  find_package(PythonInterp @PYTHON_VERSION@ REQUIRED)
+  find_package(PythonLibs @PYTHON_VERSION@  REQUIRED)
+endif(@USE_PYTHON@)
+
+include(${CMAKE_CURRENT_LIST_DIR}/netgen-targets.cmake)
+message(STATUS "Found Netgen: ${NETGEN_DIR}")

cmake_modules/SuperBuild.cmake

@@ -0,0 +1,141 @@
+include (ExternalProject)
+
+set_property (DIRECTORY PROPERTY EP_PREFIX dependencies)
+
+set (NETGEN_DEPENDENCIES)
+set (LAPACK_DEPENDENCIES)
+set (NETGEN_CMAKE_ARGS)
+
+set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH}" "${PROJECT_SOURCE_DIR}/cmake_modules")
+
+macro(set_vars VAR_OUT)
+  foreach(varname ${ARGN})
+    if(NOT "${${varname}}" STREQUAL "")
+      string(REPLACE ";" "$<SEMICOLON>" varvalue "${${varname}}" )
+      list(APPEND ${VAR_OUT} -D${varname}=${varvalue})
+    endif()
+  endforeach()
+endmacro()
+#######################################################################
+if(WIN32)
+  if(NOT CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
+    string(REGEX REPLACE "/W[0-4]" "/W0" CMAKE_CXX_FLAGS_NEW ${CMAKE_CXX_FLAGS})
+    set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS_NEW} CACHE STRING "compile flags" FORCE)
+    string(REGEX REPLACE "/W[0-4]" "/W0" CMAKE_CXX_FLAGS_NEW ${CMAKE_CXX_FLAGS_RELEASE})
+    set(CMAKE_CXX_FLAGS_RELEASE ${CMAKE_CXX_FLAGS_NEW} CACHE STRING "compile flags" FORCE)
+
+    string(REGEX REPLACE "/W[0-4]" "/W0" CMAKE_SHARED_LINKER_FLAGS_NEW ${CMAKE_SHARED_LINKER_FLAGS})
+    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS_NEW} /IGNORE:4217,4049" CACHE STRING "compile flags" FORCE)
+    string(REGEX REPLACE "/W[0-4]" "/W0" CMAKE_EXE_LINKER_FLAGS_NEW ${CMAKE_EXE_LINKER_FLAGS})
+    set(CMAKE_EXE_LINKER_FLAGS"${CMAKE_EXE_LINKER_FLAGS_NEW}/IGNORE:4217,4049" CACHE STRING "compile flags" FORCE)
+
+    set_vars(NETGEN_CMAKE_ARGS CMAKE_SHARED_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS_RELEASE CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_RELEASE)
+  endif(NOT CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
+
+  if(${CMAKE_SIZEOF_VOID_P} MATCHES 4)
+    # 32 bit
+    set(EXT_LIBS_DOWNLOAD_URL_WIN "http://www.asc.tuwien.ac.at/~mhochsteger/ngsuite/ext_libs32.zip" CACHE STRING INTERNAL)
+    set(OCC_DOWNLOAD_URL_WIN "http://www.asc.tuwien.ac.at/~mhochsteger/ngsuite/occ32.zip" CACHE STRING INTERNAL)
+  else(${CMAKE_SIZEOF_VOID_P} MATCHES 4)
+    # 64 bit
+    set(EXT_LIBS_DOWNLOAD_URL_WIN "http://www.asc.tuwien.ac.at/~mhochsteger/ngsuite/ext_libs64.zip" CACHE STRING INTERNAL)
+    set(OCC_DOWNLOAD_URL_WIN "http://www.asc.tuwien.ac.at/~mhochsteger/ngsuite/occ64.zip" CACHE STRING INTERNAL)
+  endif(${CMAKE_SIZEOF_VOID_P} MATCHES 4)
+endif(WIN32)
+
+#######################################################################
+# find netgen
+set(INSTALL_DIR /opt/netgen CACHE PATH "Install path")
+if(APPLE)
+  set(CMAKE_INSTALL_PREFIX "${INSTALL_DIR}/Netgen.app/Contents/Resources" CACHE INTERNAL "Prefix prepended to install directories" FORCE)
+else(APPLE)
+  set(CMAKE_INSTALL_PREFIX "${INSTALL_DIR}" CACHE INTERNAL "Prefix prepended to install directories" FORCE)
+endif(APPLE)
+
+if(NOT WIN32)
+    find_package(ZLIB REQUIRED)
+    set_vars(NETGEN_CMAKE_ARGS ZLIB_INCLUDE_DIRS ZLIB_LIBRARIES)
+endif(NOT WIN32)
+
+#######################################################################
+if (USE_PYTHON)
+    find_path(PYBIND_INCLUDE_DIR pybind11/pybind11.h ${CMAKE_CURRENT_SOURCE_DIR}/external_dependencies/pybind11/include)
+    if( NOT PYBIND_INCLUDE_DIR )
+      execute_process(COMMAND git submodule update --init --recursive WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
+        find_path(PYBIND_INCLUDE_DIR pybind11/pybind11.h ${CMAKE_CURRENT_SOURCE_DIR}/external_dependencies/pybind11/include)
+    endif( NOT PYBIND_INCLUDE_DIR )
+    if( PYBIND_INCLUDE_DIR )
+        message("-- Found Pybind11: ${PYBIND_INCLUDE_DIR}")
+    else( PYBIND_INCLUDE_DIR )
+        message(FATAL_ERROR "Could NOT find pybind11!")
+    endif( PYBIND_INCLUDE_DIR )
+    set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH}" "${PROJECT_SOURCE_DIR}/cmake_modules/python")
+    set(PYTHON_VERSION "3" CACHE STRING "Python version (only Python >= 3.0 supported)")
+    set(Python_ADDITIONAL_VERSIONS 3.5)
+    if( PYTHON_VERSION VERSION_LESS 3 )
+        message(FATAL_ERROR "Netgen supports only Python 3")
+    endif( PYTHON_VERSION VERSION_LESS 3 )
+    find_package(PythonInterp ${PYTHON_VERSION} REQUIRED)
+    find_package(PythonLibs ${PYTHON_VERSION}  REQUIRED)
+
+    set(PYTHON_LIBS "${PYTHON_LIBRARIES}")
+    execute_process(COMMAND ${PYTHON_EXECUTABLE} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib(1,0,''))" OUTPUT_VARIABLE PYTHON_PACKAGES_INSTALL_DIR OUTPUT_STRIP_TRAILING_WHITESPACE)
+    set_vars(NETGEN_CMAKE_ARGS PYTHON_LIBS PYTHON_LIBRARY PYTHON_PACKAGES_INSTALL_DIR PYTHON_INCLUDE_DIR PYBIND_INCLUDE_DIR PYTHON_LIBRARIES PYTHON_EXECUTABLE PYTHON_VERSION)
+endif (USE_PYTHON)
+
+#######################################################################
+
+if(USE_OCC AND WIN32)
+    ExternalProject_Add(win_download_occ
+      PREFIX ${CMAKE_CURRENT_BINARY_DIR}/tcl
+      URL ${OCC_DOWNLOAD_URL_WIN}
+      UPDATE_COMMAND "" # Disable update
+      BUILD_IN_SOURCE 1
+      CONFIGURE_COMMAND ""
+      BUILD_COMMAND ""
+      INSTALL_COMMAND ${CMAKE_COMMAND} -E copy_directory . ${INSTALL_DIR}
+      LOG_DOWNLOAD 1
+      )
+    list(APPEND NETGEN_DEPENDENCIES win_download_occ)
+endif(USE_OCC AND WIN32)
+
+#######################################################################
+
+if(USE_GUI)
+  include(cmake_modules/ExternalProject_TCLTK.cmake)
+endif(USE_GUI)
+
+#######################################################################
+# propagate cmake variables to Netgen subproject
+set_vars( NETGEN_CMAKE_ARGS
+  USE_GUI
+  USE_PYTHON
+  USE_MPI
+  USE_VT
+  USE_VTUNE
+  USE_NUMA
+  USE_CCACHE
+  USE_NATIVE_ARCH
+  USE_OCC
+  INSTALL_DIR
+  INSTALL_DEPENDENCIES
+  INTEL_MIC
+  )
+
+ExternalProject_Add (netgen
+  DEPENDS ${NETGEN_DEPENDENCIES}
+  SOURCE_DIR ${PROJECT_SOURCE_DIR}
+  CMAKE_ARGS -DUSE_SUPERBUILD=OFF ${NETGEN_CMAKE_ARGS} -DCMAKE_PREFIX_PATH=${INSTALL_DIR}
+  INSTALL_COMMAND ""
+  BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/netgen
+  BUILD_COMMAND ${CMAKE_COMMAND} --build ${CMAKE_CURRENT_BINARY_DIR}/netgen --config ${CMAKE_BUILD_TYPE}
+  STEP_TARGETS build
+)
+
+install(CODE "execute_process(COMMAND cmake --build . --target install --config ${CMAKE_BUILD_TYPE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/netgen)")
+
+add_custom_target(test_netgen
+  ${CMAKE_COMMAND} --build ${CMAKE_CURRENT_BINARY_DIR}/netgen
+                   --target test
+                   --config ${CMAKE_BUILD_TYPE}
+                   )

cmake_modules/tkdnd_macosx.patch

@@ -0,0 +1,35 @@
+diff -Naur orig/tkdnd2.8/configure changed/tkdnd2.8/configure
+--- tkdnd2.8/configure	2015-05-13 19:24:32.000000000 +0200
++++ tkdnd2.8/configure	2016-02-22 15:26:37.000000000 +0100
+@@ -6145,7 +6145,7 @@
+ 
+ 
+ 
+-    PKG_CFLAGS="$PKG_CFLAGS -DMAC_TK_COCOA -std=gnu99 -x objective-c -fobjc-gc"
++    PKG_CFLAGS="$PKG_CFLAGS -DMAC_TK_COCOA -std=gnu99 -x objective-c"
+ 
+ 
+ 
+diff -Naur orig/tkdnd2.8/configure.in changed/tkdnd2.8/configure.in
+--- tkdnd2.8/configure.in	2015-05-13 19:24:32.000000000 +0200
++++ tkdnd2.8/configure.in	2016-02-22 15:26:44.000000000 +0100
+@@ -126,7 +126,7 @@
+ 
+ if test "${TEA_WINDOWINGSYSTEM}" = "aqua"; then
+     TEA_ADD_SOURCES([macosx/macdnd.m])
+-    TEA_ADD_CFLAGS([-DMAC_TK_COCOA -std=gnu99 -x objective-c -fobjc-gc])
++    TEA_ADD_CFLAGS([-DMAC_TK_COCOA -std=gnu99 -x objective-c])
+     TEA_ADD_LIBS([-framework Cocoa -framework Carbon])
+ fi
+ 
+diff -Naur orig/tkdnd2.8/macosx/macdnd.m changed/tkdnd2.8/macosx/macdnd.m
+--- tkdnd2.8/macosx/macdnd.m	2015-07-06 21:49:14.000000000 +0200
++++ tkdnd2.8/macosx/macdnd.m	2016-02-22 15:27:04.000000000 +0100
+@@ -16,6 +16,7 @@
+ #import <tcl.h>
+ #import <tk.h>
+ #import <tkInt.h>
++#undef panic
+ #import <tkMacOSXInt.h>
+ #import <Cocoa/Cocoa.h>
+