Dennis:

OpenMesh cmake support

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@111 fdac6126-5c0c-442c-9429-916003d36597

CMakeLists.txt

+cmake_minimum_required (VERSION 2.6)
+
+project (OpenMesh)
+
+# add our macro directory to cmake search path
+set (CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_SOURCE_DIR}/cmake)
+
+# include our cmake files
+include (ACGCommon)
+
+acg_get_version ()
+
+include (ACGOutput)
+
+if (WIN32)
+  add_definitions(
+      -D_USE_MATH_DEFINES -DNOMINMAX
+  )
+endif ()
+
+add_subdirectory (src/OpenMesh/Core)
+add_subdirectory (src/OpenMesh/Tools)
+add_subdirectory (src/OpenMesh/Apps)
+
+# display results
+acg_print_configure_header ("OpenMesh")

VERSION

-2-0-RC2
-$Name:  $
+VERSION=2.0-RC2
+MAJOR=2
+MINOR=0
+PATCH=0

cmake/ACGCommon.cmake

+if (EXISTS ${CMAKE_SOURCE_DIR}/${CMAKE_PROJECT_NAME}.cmake)
+  include (${CMAKE_SOURCE_DIR}/${CMAKE_PROJECT_NAME}.cmake)
+endif ()
+
+# prevent build in source directory
+if ("${CMAKE_BINARY_DIR}" STREQUAL "${CMAKE_SOURCE_DIR}")
+    message (SEND_ERROR "Building in the source directory is not supported.")
+    message (FATAL_ERROR "Please remove the created \"CMakeCache.txt\" file, the \"CMakeFiles\" directory and create a build directory and call \"${CMAKE_COMMAND} <path to the sources>\".")
+endif ("${CMAKE_BINARY_DIR}" STREQUAL "${CMAKE_SOURCE_DIR}")
+
+# allow only Debug and Release builds
+set (CMAKE_CONFIGURATION_TYPES "Debug;Release" CACHE STRING "" FORCE)
+mark_as_advanced (CMAKE_CONFIGURATION_TYPES)
+
+# set Debus as default build target
+if (NOT CMAKE_BUILD_TYPE)
+  set (CMAKE_BUILD_TYPE Debug CACHE STRING
+      "Choose the type of build, options are: Debug, Release."
+      FORCE)
+endif ()
+
+# create our output directroy
+if (NOT EXISTS ${CMAKE_BINARY_DIR}/Build)
+  file (MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/Build)
+endif ()
+
+# read version from file
+macro (acg_get_version)
+    file (READ "${CMAKE_CURRENT_SOURCE_DIR}/VERSION" _file)
+    string (
+        REGEX REPLACE
+        "^.*VERSION=([^\n]*).*$" "\\1"
+        _version ${_file}
+    )
+    string (
+        REGEX REPLACE
+        "^.*MAJOR=([^\n]*).*$" "\\1"
+        _major ${_file}
+    )
+    string (
+        REGEX REPLACE
+        "^.*MINOR=([^\n]*).*$" "\\1"
+        _minor ${_file}
+    )
+    string (
+        REGEX REPLACE
+        "^.*PATCH=([^\n]*).*$" "\\1"
+        _patch ${_file}
+    )
+    set (VERSION ${_version})
+    set (VERSION_MAJOR ${_major})
+    set (VERSION_MINOR ${_minor})
+    set (VERSION_PATCH ${_patch})
+endmacro ()
+
+
+# set directory structures for the different platforms
+if (WIN32)
+  set (ACG_PROJECT_DATADIR ".")
+  set (ACG_PROJECT_LIBDIR "bin")
+  set (ACG_PROJECT_BINDIR "bin")
+  set (ACG_PROJECT_PLUGINDIR "Plugins")
+  if (NOT EXISTS ${CMAKE_BINARY_DIR}/Build/${ACG_PROJECT_BINDIR})
+    file (MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/Build/${ACG_PROJECT_BINDIR})
+  endif ()
+else ()
+  set (ACG_PROJECT_DATADIR "share/${CMAKE_PROJECT_NAME}")
+  set (ACG_PROJECT_LIBDIR "lib/${CMAKE_PROJECT_NAME}")
+  set (ACG_PROJECT_PLUGINDIR "lib/${CMAKE_PROJECT_NAME}/plugins")
+  set (ACG_PROJECT_BINDIR "bin")
+endif ()
+
+# allow a project to modify the directories
+if (COMMAND acg_modify_project_dirs)
+  acg_modify_project_dirs ()
+endif ()
+
+# sets default build properties
+macro (acg_set_target_props target)
+  if (WIN32)
+    set_target_properties (
+      ${target} PROPERTIES
+      BUILD_WITH_INSTALL_RPATH 1
+      SKIP_BUILD_RPATH 0
+    )
+  elseif (APPLE AND NOT ACG_PROJECT_MACOS_BUNDLE)
+    set_target_properties (
+      ${target} PROPERTIES
+      INSTALL_NAME_DIR "@executable_path/../lib/${CMAKE_PROJECT_NAME}"
+      BUILD_WITH_INSTALL_RPATH 1
+      SKIP_BUILD_RPATH 0
+    )
+  elseif (NOT APPLE)
+    set_target_properties (
+      ${target} PROPERTIES
+      INSTALL_RPATH "$ORIGIN/../lib/${CMAKE_PROJECT_NAME}"
+      BUILD_WITH_INSTALL_RPATH 1
+      SKIP_BUILD_RPATH 0
+      RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/Build/${ACG_PROJECT_BINDIR}"
+      LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/Build/${ACG_PROJECT_LIBDIR}"
+    )
+  endif ()
+endmacro ()
+
+include (AddFileDependencies)
+include (ACGCompiler)
+
+# define INCLUDE_TEMPLATES for everything we build
+add_definitions (-DINCLUDE_TEMPLATES)
+
+# look for selected qt dependencies
+macro (acg_qt4)
+  if (NOT QT4_FOUND)
+    find_package (Qt4 ${ARGN})
+
+    set (QT_USE_QTOPENGL 1)
+    set (QT_USE_QTNETWORK 1)
+    set (QT_USE_QTSCRIPT 1)
+    set (QT_USE_QTSQL 1)
+    set (QT_USE_QTHELP 1)
+    set (QT_USE_QTWEBKIT 1)
+    set (QT_USE_QTUITOOLS 1)
+
+    include (${QT_USE_FILE})
+  endif ()
+endmacro ()
+
+# unsets the given variable
+macro (acg_unset var)
+    set (${var} "" CACHE INTERNAL "")
+endmacro ()
+
+# sets the given variable
+macro (acg_set var value)
+    set (${var} ${value} CACHE INTERNAL "")
+endmacro ()
+
+# test for OpenMP
+macro (acg_openmp)
+  if (NOT OPENMP_NOTFOUND)
+    find_package(OpenMP)
+    if (OPENMP_FOUND)
+      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
+      set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
+      add_definitions(-DUSE_OPENMP)
+    else ()
+      set (OPENMP_NOTFOUND 1)
+    endif ()
+  endif ()
+endmacro ()
+
+# test for FTGL
+macro (acg_ftgl)
+  find_package (Freetype)
+
+  if (FREETYPE_FOUND)
+    find_package (FTGL)
+
+    if (FTGL_FOUND)
+      add_definitions (-DUSE_FTGL)
+      include_directories (${FTGL_INCLUDE_DIR} ${FREETYPE_INCLUDE_DIR_freetype2})
+      set (FTGL_LIBS ${FREETYPE_LIBRARIES} ${FTGL_LIBRARIES})
+    endif ()
+  endif ()
+endmacro ()
+
+# append all files with extension "ext" in the "dirs" directories to "ret"
+macro (acg_append_files ret ext)
+  foreach (_dir ${ARGN})
+    file (GLOB _files "${_dir}/${ext}")
+    list (APPEND ${ret} ${_files})
+  endforeach ()
+endmacro ()
+
+# append all files with extension "ext" in the "dirs" directories and its subdirectories to "ret"
+macro (acg_append_files_recursive ret ext)
+  foreach (_dir ${ARGN})
+    file (GLOB_RECURSE _files "${_dir}/${ext}")
+    list (APPEND ${ret} ${_files})
+  endforeach ()
+endmacro ()
+
+# drop all "*T.cc" files from list
+macro (acg_drop_templates list)
+  foreach (_file ${${list}})
+    if (_file MATCHES "T.cc$")
+      list (REMOVE_ITEM ${list} ${_file})
+    endif ()
+  endforeach ()
+endmacro ()
+
+# generate moc targets for sources in list
+macro (acg_qt4_automoc moc_SRCS)
+  qt4_get_moc_flags (_moc_INCS)
+
+  set (_matching_FILES )
+  foreach (_current_FILE ${ARGN})
+
+     get_filename_component (_abs_FILE ${_current_FILE} ABSOLUTE)
+     # if "SKIP_AUTOMOC" is set to true, we will not handle this file here.
+     # here. this is required to make bouic work correctly:
+     # we need to add generated .cpp files to the sources (to compile them),
+     # but we cannot let automoc handle them, as the .cpp files don't exist yet when
+     # cmake is run for the very first time on them -> however the .cpp files might
+     # exist at a later run. at that time we need to skip them, so that we don't add two
+     # different rules for the same moc file
+     get_source_file_property (_skip ${_abs_FILE} SKIP_AUTOMOC)
+
+     if ( NOT _skip AND EXISTS ${_abs_FILE} )
+
+        file (READ ${_abs_FILE} _contents)
+
+        get_filename_component (_abs_PATH ${_abs_FILE} PATH)
+
+        string (REGEX MATCHALL "Q_OBJECT" _match "${_contents}")
+        if (_match)
+            get_filename_component (_basename ${_current_FILE} NAME_WE)
+            set (_header ${_abs_FILE})
+            set (_moc    ${CMAKE_CURRENT_BINARY_DIR}/moc_${_basename}.cpp)
+
+            add_custom_command (OUTPUT ${_moc}
+                COMMAND ${QT_MOC_EXECUTABLE}
+                ARGS ${_moc_INCS} ${_header} -o ${_moc}
+                DEPENDS ${_header}
+            )
+
+            add_file_dependencies (${_abs_FILE} ${_moc})
+            set (${moc_SRCS} ${${moc_SRCS}} ${_moc})
+            
+        endif ()
+     endif ()
+  endforeach ()
+endmacro ()
+
+# generate uic targets for sources in list
+macro (acg_qt4_autouic uic_SRCS)
+
+  set (_matching_FILES )
+  foreach (_current_FILE ${ARGN})
+
+     get_filename_component (_abs_FILE ${_current_FILE} ABSOLUTE)
+
+     if ( EXISTS ${_abs_FILE} )
+
+        file (READ ${_abs_FILE} _contents)
+
+        get_filename_component (_abs_PATH ${_abs_FILE} PATH)
+
+        get_filename_component (_basename ${_current_FILE} NAME_WE)
+        string (REGEX REPLACE "Ui$" "" _cbasename ${_basename})
+        set (_outfile ${CMAKE_CURRENT_BINARY_DIR}/ui_${_basename}.hh)
+        set (_header ${_basename}.hh)
+        set (_source ${_abs_PATH}/${_cbasename}.cc)
+        
+        add_custom_command (OUTPUT ${_outfile}
+            COMMAND ${QT_UIC_EXECUTABLE}
+            ARGS -o ${_outfile} ${_abs_FILE}
+            DEPENDS ${_abs_FILE})
+
+        add_file_dependencies (${_source} ${_outfile})
+        set (${uic_SRCS} ${${uic_SRCS}} ${_outfile})
+            
+     endif ()
+  endforeach ()
+endmacro ()
+
+# get all files in directory, but ignore svn
+macro (acg_get_files_in_dir ret dir)
+  file (GLOB_RECURSE __files RELATIVE "${dir}" "${dir}/*")
+  foreach (_file ${__files})
+    if (NOT _file MATCHES ".*svn.*")
+      list (APPEND ${ret} "${_file}")
+    endif ()
+  endforeach ()
+endmacro ()
+
+# copy the whole directory without svn files
+function (acg_copy_after_build target src dst)
+  acg_unset (_files)
+  acg_get_files_in_dir (_files ${src})
+  foreach (_file ${_files})
+    add_custom_command(TARGET ${target} POST_BUILD
+      COMMAND ${CMAKE_COMMAND} -E copy_if_different "${src}/${_file}" "${dst}/${_file}"
+    )
+  endforeach ()
+endfunction ()
+
+# install the whole directory without svn files
+function (acg_install_dir src dst)
+  acg_unset (_files)
+  acg_get_files_in_dir (_files ${src})
+  foreach (_file ${_files})
+    get_filename_component (_file_PATH ${_file} PATH)
+    install(FILES "${src}/${_file}"
+      DESTINATION "${dst}/${_file_PATH}"
+    )
+  endforeach ()
+endfunction ()
+
+# extended version of add_executable that also copies output to out Build directory
+function (acg_add_executable _target)
+  add_executable (${_target} ${ARGN})
+
+  # set common target properties defined in common.cmake
+  acg_set_target_props (${_target})
+
+  if (WIN32)
+    # copy exe file to "Build" directory
+    # Visual studio will create this file in a subdirectory so we can't use
+    # RUNTIME_OUTPUT_DIRECTORY directly here
+    add_custom_command (TARGET ${_target} POST_BUILD
+                        COMMAND ${CMAKE_COMMAND} -E
+                        copy_if_different
+                          ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}/${_target}.exe
+                          ${CMAKE_BINARY_DIR}/Build/${ACG_PROJECT_BINDIR}/${_target}.exe)
+  elseif (APPLE AND NOT ACG_PROJECT_MACOS_BUNDLE)
+    add_custom_command (TARGET ${_target} POST_BUILD
+                        COMMAND ${CMAKE_COMMAND} -E
+                        copy_if_different
+                          ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}/${_target}
+                          ${CMAKE_BINARY_DIR}/Build/${ACG_PROJECT_BINDIR}/${_target})
+  endif ()
+  if (NOT ACG_PROJECT_BUNDLE OR NOT APPLE)
+    install (TARGETS ${_target} DESTINATION ${ACG_PROJECT_BINDIR})
+  endif ()
+endfunction ()
+
+# extended version of add_library that also copies output to out Build directory
+function (acg_add_library _target _type)
+  add_library (${_target} ${_type} ${ARGN})
+
+  # set common target properties defined in common.cmake
+  acg_set_target_props (${_target})
+
+  if (WIN32)
+    # copy exe file to "Build" directory
+    # Visual studio will create this file in a subdirectory so we can't use
+    # RUNTIME_OUTPUT_DIRECTORY directly here
+    if (${_type} STREQUAL SHARED)
+      add_custom_command (TARGET ${_target} POST_BUILD
+                          COMMAND ${CMAKE_COMMAND} -E
+                          copy_if_different
+                            ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}/${_target}.dll
+                            ${CMAKE_BINARY_DIR}/Build/${ACG_PROJECT_LIBDIR}/${_target}.dll)
+    elseif (${_type} STREQUAL MODULE)
+      if (NOT EXISTS ${CMAKE_BINARY_DIR}/Build/${ACG_PROJECT_PLUGINDIR})
+        file (MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/Build/${ACG_PROJECT_PLUGINDIR})
+      endif ()
+      add_custom_command (TARGET ${_target} POST_BUILD
+                          COMMAND ${CMAKE_COMMAND} -E
+                          copy_if_different
+                            ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}/${_target}.dll
+                            ${CMAKE_BINARY_DIR}/Build/${ACG_PROJECT_PLUGINDIR}/${_target}.dll)
+    endif ()
+  elseif (APPLE AND NOT ACG_PROJECT_MACOS_BUNDLE)
+    if (${_type} STREQUAL SHARED)
+      add_custom_command (TARGET ${target} POST_BUILD
+                          COMMAND ${CMAKE_COMMAND} -E
+                          copy_if_different
+                            ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}/${_target}.dylib
+                            ${CMAKE_BINARY_DIR}/Build/${ACG_PROJECT_LIBDIR}/${_target}.dylib)
+    elseif (${_type} STREQUAL MODULE)
+      if (NOT EXISTS ${CMAKE_BINARY_DIR}/Build/${ACG_PROJECT_PLUGINDIR})
+        file (MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/Build/${ACG_PROJECT_PLUGINDIR})
+      endif ()
+      add_custom_command (TARGET ${target} POST_BUILD
+                          COMMAND ${CMAKE_COMMAND} -E
+                          copy_if_different
+                            ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}/${_target}.so
+                            ${CMAKE_BINARY_DIR}/Build/${ACG_PROJECT_PLUGINDIR}/${_target}.so)
+    endif ()
+  endif ()
+  if (NOT ACG_PROJECT_BUNDLE OR NOT APPLE)
+    if (${_type} STREQUAL SHARED)
+      install (TARGETS ${_target} DESTINATION ${ACG_PROJECT_LIBDIR})
+    elseif (${_type} STREQUAL MODULE)
+      install (TARGETS ${_target} DESTINATION ${ACG_PROJECT_PLUGINDIR})
+    endif ()
+  endif ()
+endfunction ()

cmake/ACGCompiler.cmake

+################################################################################
+# Custom settings for compiler flags and similar
+################################################################################
+
+if (UNIX)
+        
+  set (CMAKE_CFLAGS_RELEASE "-O3 -DINCLUDE_TEMPLATES -W -Wall -Wno-unused -DNDEBUG")
+  set (CMAKE_CXX_FLAGS_RELEASE "-O3 -DINCLUDE_TEMPLATES -ftemplate-depth-100 -W -Wall -Wno-unused -DNDEBUG")
+  set (CMAKE_C_FLAGS_DEBUG "-g -DINCLUDE_TEMPLATES -W -Wall -Wno-unused -DDEBUG")
+  set (CMAKE_CXX_FLAGS_DEBUG "-g -DINCLUDE_TEMPLATES -ftemplate-depth-100 -W -Wall -Wno-unused -DDEBUG")
+
+  if (APPLE)
+    add_definitions( -DARCH_DARWIN )
+    set (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -Wno-non-virtual-dtor")
+    set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Wno-non-virtual-dtor")
+  endif ()
+endif ()

cmake/ACGOutput.cmake

+# fill string with spaces
+macro (acg_format_string str length return)
+    string (LENGTH "${str}" _str_len)
+    math (EXPR _add_chr "${length} - ${_str_len}")
+    set (${return} "${str}")
+    while (_add_chr GREATER 0)
+        set (${return} "${${return}} ")
+        math (EXPR _add_chr "${_add_chr} - 1")
+    endwhile ()
+endmacro ()
+
+# print message with color escape sequences if CMAKE_COLOR_MAKEFILE is set
+string (ASCII 27 _escape)
+function (acg_color_message _str)
+    if (CMAKE_COLOR_MAKEFILE AND NOT WIN32)
+        message (${_str})
+    else ()
+        string (REGEX REPLACE "${_escape}.[0123456789;]*m" "" __str ${_str})
+        message (${__str})
+    endif ()
+endfunction ()
+
+# info header
+function (acg_print_configure_header _name)
+    acg_format_string ("${_name}" 40 _project)
+    acg_format_string ("${VERSION}" 40 _version)
+    acg_color_message ("\n${_escape}[40;37m************************************************************${_escape}[0m")
+    acg_color_message ("${_escape}[40;37m* ${_escape}[1;31mACG ${_escape}[0;40;34mBuildsystem${_escape}[0m${_escape}[40;37m                                          *${_escape}[0m")
+    acg_color_message ("${_escape}[40;37m*                                                          *${_escape}[0m")
+    acg_color_message ("${_escape}[40;37m* Package : ${_escape}[32m${_project} ${_escape}[37m      *${_escape}[0m")
+    acg_color_message ("${_escape}[40;37m* Version : ${_escape}[32m${_version} ${_escape}[37m      *${_escape}[0m")
+    acg_color_message ("${_escape}[40;37m************************************************************${_escape}[0m")
+endfunction ()
+
+# info line
+function (acg_print_configure_footer)
+    acg_color_message ("${_escape}[40;37m************************************************************${_escape}[0m\n")
+endfunction ()
+

cmake/FindGLEW.cmake

+# - Try to find GLEW
+# Once done this will define
+#  
+#  GLEW_FOUND        - system has GLEW
+#  GLEW_INCLUDE_DIR  - the GLEW include directory
+#  GLEW_LIBRARY_DIR  - where the libraries are
+#  GLEW_LIBRARY      - Link these to use GLEW
+#   
+
+IF (GLEW_INCLUDE_DIR)
+  # Already in cache, be silent
+  SET(GLEW_FIND_QUIETLY TRUE)
+ENDIF (GLEW_INCLUDE_DIR)
+
+if( WIN32 )
+   if( MSVC80 )
+       set( COMPILER_PATH "C:/Program\ Files/Microsoft\ Visual\ Studio\ 8/VC" )
+   endif( MSVC80 )
+   if( MSVC71 )
+       set( COMPILER_PATH "C:/Program\ Files/Microsoft\ Visual\ Studio\ .NET\ 2003/Vc7" )
+   endif( MSVC71 )
+   FIND_PATH( GLEW_INCLUDE_DIR gl/glew.h gl/wglew.h
+              PATHS c:/glew/include ${COMPILER_PATH}/PlatformSDK/Include )
+   SET( GLEW_NAMES glew32 )
+   FIND_LIBRARY( GLEW_LIBRARY
+                 NAMES ${GLEW_NAMES}
+                 PATHS c:/glew/lib ${COMPILER_PATH}/PlatformSDK/Lib )
+else( WIN32 )
+   FIND_PATH( GLEW_INCLUDE_DIR glew.h wglew.h
+              PATHS /usr/local/include /usr/include
+              PATH_SUFFIXES gl/ GL/ )
+   SET( GLEW_NAMES glew GLEW )
+   FIND_LIBRARY( GLEW_LIBRARY
+                 NAMES ${GLEW_NAMES}
+                 PATHS /usr/lib /usr/local/lib )
+endif( WIN32 )
+
+GET_FILENAME_COMPONENT( GLEW_LIBRARY_DIR ${GLEW_LIBRARY} PATH )
+
+IF (GLEW_INCLUDE_DIR AND GLEW_LIBRARY)
+   SET(GLEW_FOUND TRUE)
+    SET( GLEW_LIBRARY_DIR ${GLEW_LIBRARY} )
+ELSE (GLEW_INCLUDE_DIR AND GLEW_LIBRARY)
+   SET( GLEW_FOUND FALSE )
+   SET( GLEW_LIBRARY_DIR )
+ENDIF (GLEW_INCLUDE_DIR AND GLEW_LIBRARY)
+

cmake/FindOpenMP.cmake

+# - Finds OpenMP support
+# This module can be used to detect OpenMP support in a compiler.
+# If the compiler supports OpenMP, the flags required to compile with
+# openmp support are set.  
+#
+# The following variables are set:
+#   OpenMP_C_FLAGS - flags to add to the C compiler for OpenMP support
+#   OpenMP_CXX_FLAGS - flags to add to the CXX compiler for OpenMP support
+#   OPENMP_FOUND - true if openmp is detected
+#
+# Supported compilers can be found at http://openmp.org/wp/openmp-compilers/
+
+
+# Copyright 2008, 2009 <André Rigland Brodtkorb> Andre.Brodtkorb@ifi.uio.no
+#
+# Redistribution AND use is allowed according to the terms of the New 
+# BSD license. 
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+
+include(CheckCSourceCompiles)
+include(CheckCXXSourceCompiles)
+include(FindPackageHandleStandardArgs)
+
+set(OpenMP_C_FLAG_CANDIDATES
+  #Gnu
+  "-fopenmp"
+  #Microsoft Visual Studio
+  "/openmp"
+  #Intel windows
+  "-Qopenmp" 
+  #Intel
+  "-openmp" 
+  #Empty, if compiler automatically accepts openmp
+  " "
+  #Sun
+  "-xopenmp"
+  #HP
+  "+Oopenmp"
+  #IBM XL C/c++
+  "-qsmp"
+  #Portland Group
+  "-mp"
+)
+set(OpenMP_CXX_FLAG_CANDIDATES ${OpenMP_C_FLAG_CANDIDATES})
+
+# sample openmp source code to test
+set(OpenMP_C_TEST_SOURCE 
+"
+#include <omp.h>
+int main() { 
+#ifdef _OPENMP
+  return 0; 
+#else
+  breaks_on_purpose
+#endif
+}
+")
+# use the same source for CXX as C for now
+set(OpenMP_CXX_TEST_SOURCE ${OpenMP_C_TEST_SOURCE})
+# if these are set then do not try to find them again,
+# by avoiding any try_compiles for the flags
+if(DEFINED OpenMP_C_FLAGS AND DEFINED OpenMP_CXX_FLAGS)
+  set(OpenMP_C_FLAG_CANDIDATES)
+  set(OpenMP_CXX_FLAG_CANDIDATES)
+endif(DEFINED OpenMP_C_FLAGS AND DEFINED OpenMP_CXX_FLAGS)
+
+# check c compiler
+foreach(FLAG ${OpenMP_C_FLAG_CANDIDATES})
+  set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
+  set(CMAKE_REQUIRED_FLAGS "${FLAG}")
+  set(OpenMP_C_FLAG_DETECTED)
+  message(STATUS "Try OpenMP C flag = [${FLAG}]")
+  check_c_source_compiles("${OpenMP_CXX_TEST_SOURCE}" OpenMP_C_FLAG_DETECTED)
+  set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}")
+  if(OpenMP_C_FLAG_DETECTED)
+    set(OpenMP_C_FLAGS_INTERNAL "${FLAG}")
+    break()
+  endif(OpenMP_C_FLAG_DETECTED) 
+endforeach(FLAG ${OpenMP_C_FLAG_CANDIDATES})
+
+# check cxx compiler
+foreach(FLAG ${OpenMP_CXX_FLAG_CANDIDATES})
+  set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
+  set(CMAKE_REQUIRED_FLAGS "${FLAG}")
+  set(OpenMP_CXX_FLAG_DETECTED)
+  message(STATUS "Try OpenMP CXX flag = [${FLAG}]")
+  check_cxx_source_compiles("${OpenMP_C_TEST_SOURCE}" OpenMP_CXX_FLAG_DETECTED)
+  set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}")
+  if(OpenMP_CXX_FLAG_DETECTED)
+    set(OpenMP_CXX_FLAGS_INTERNAL "${FLAG}")
+    break()
+  endif(OpenMP_CXX_FLAG_DETECTED)
+endforeach