cmake_minimum_required(VERSION 2.8.12 FATAL_ERROR)

set(PROJECT_VERSION 1.0.1)
project(INFRASCAL LANGUAGES C CXX)

add_compile_options(-fext-numeric-literals -w)


########################### Misc. Configs ##############################
# Add custom cmake files folder
SET (PROJECT_CMAKE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
# This sets where to look for modules (e.g. "Find*.cmake" files)
SET (CMAKE_MODULE_PATH "${PROJECT_CMAKE_DIR}" "${CMAKE_MODULE_PATH}" )

# Add custom Install Settings
INCLUDE(InstallSettings)


# Libraries
set(INFRASCAL_INCLUDE_INSTALL_PATH "include")
# Library finding
include(LibraryConfig)

# General build and compiler options and configurations
include(BuildConfig)

# PRINT macro
macro(print)
  message(STATUS ${ARGN})
endmacro(print)

# Last but not least: Try to make doxygen target
add_subdirectory(cmake/doc)

################ Various Options ################

# various macro includes
include(FlagUtilities)
include(InstallUtilities)
include(SourceFileUtilities)
include(BinaryUtilities)

############## InfrasCalConfig.h ##############

# Check endianness
include(TestBigEndian)
test_big_endian(INFRASCAL_BIG_ENDIAN)
if(NOT INFRASCAL_BIG_ENDIAN)
  set(INFRASCAL_LITTLE_ENDIAN TRUE)
endif()

# 32/64 bit system check
if(CMAKE_SIZEOF_VOID_P EQUAL 8)
  set(INFRASCAL_ARCH_64 TRUE)
else()
  set(INFRASCAL_ARCH_32 TRUE)
endif()

# Platforms
set(INFRASCAL_PLATFORM_WINDOWS ${WIN32})
set(INFRASCAL_PLATFORM_APPLE ${APPLE})
set(INFRASCAL_PLATFORM_UNIX ${UNIX})
if(UNIX AND NOT APPLE)
  set(INFRASCAL_PLATFORM_LINUX TRUE)
endif()

set(BUILD_SHARED_LIBS ON)

# Check __forceinline
if(MSVC)
  include(CheckCXXSourceCompiles)
  set(_source "int main() { return 0; } __forceinline void test() { return; }")
  check_cxx_source_compiles("${_source}" HAVE_FORCEINLINE)
endif(MSVC)

# Check ciso646 include (literal operators)
include(CheckIncludeFileCXX)
check_include_file_cxx(iso646.h HAVE_ISO646_H)

# XCode and Visual Studio support multiple configurations. In order to tell the
# which one we have to define the macros separately for each configuration
add_compiler_flags("-DCMAKE_BUILD_TYPE=Debug"          Debug)
add_compiler_flags("-DCMAKE_BUILD_TYPE=Release"        Release)
add_compiler_flags("-DCMAKE_BUILD_TYPE=RelWithDebInfo" RelWithDebInfo)
add_compiler_flags("-DCMAKE_BUILD_TYPE=MinSizeRel"     MinSizeRel)

set(GENERATED_FILE_COMMENT
   "DO NOT EDIT THIS FILE!
    It has been automatically generated by CMake from InfrasCalConfig.h.in")
# Copy and configure InfrasCalConfig which gets included in every file
configure_file(InfrasCalConfig.h.in ${CMAKE_CURRENT_BINARY_DIR}/InfrasCalConfig.h)
configure_file(InfrasCalPathConfig.h.in ${CMAKE_CURRENT_BINARY_DIR}/InfrasCalPathConfig.h)

############## Include Directories ##############

# Set the search paths for include files
include_directories(
  # External
  ${EIGEN3_INCLUDE_DIR}
  ${OpenCV_INCLUDE_DIRS}

  # All library includes are prefixed with the path to avoid conflicts
  ${CMAKE_CURRENT_SOURCE_DIR}

  # testing
  ${GTEST_INCLUDE_DIRS}

  # InfrasCalConfig.h
  ${CMAKE_CURRENT_BINARY_DIR}
)

if(BUILD_SHARED_LIBS)
  add_definitions(-DINFRASCAL_EXPORTS)
endif(BUILD_SHARED_LIBS)

# General linker flags
if(MSVC)
  if(NOT CMAKE_CXX_FLAGS MATCHES "/EHsc")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHsc") 
  endif()
endif(MSVC)
if(INFRASCAL_PLATFORM_UNIX)

    #set_linker_flags("-Wl,--no-undefined -ldl -lnsl -lm -pthread -lrt" CACHE)
    find_package(LibDL)
    find_package(Libnsl)
    # find_package(LibM)
    find_package(Threads)
    find_package(Librt)
    find_package(Libm)
    
    set(INFRASCAL_PLATFORM_UNIX_LIBRARIES ${LIBDL_LIBRARIES} ${LIBNSL_LIBRARIES} ${LIBM_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT} ${Librt_LIBRARIES})
    
    if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
        set_linker_flags("-Wl,-undefined,error")
    elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
        set_linker_flags("-Wl,--no-undefined")
    endif()
    
endif(INFRASCAL_PLATFORM_UNIX)
  
if(Boost_FOUND)
  include_directories(${Boost_INCLUDE_DIRS})
  link_directories(${Boost_LIBRARY_DIRS})
  add_definitions(-DBOOST_ALL_DYN_LINK)
endif()

link_directories(${CMAKE_LIBRARY_OUTPUT_DIRECTORY})

# testing
enable_testing()

set(VCHARGE_VIZ FALSE)

if(VCHARGE_VIZ)
add_definitions(-DVCHARGE_VIZ)
endif(VCHARGE_VIZ)

################ Installation project target ################

set(TARGET_NAME ${PROJECT_NAME})
add_custom_target(${TARGET_NAME} ALL)
include(GenerateExportHeader)


install(
  FILES 
      ${CMAKE_CURRENT_SOURCE_DIR}/cmake/FindBLAS.cmake
      ${CMAKE_CURRENT_SOURCE_DIR}/cmake/FindEigen3.cmake
      ${CMAKE_CURRENT_SOURCE_DIR}/cmake/FindGflags.cmake
      ${CMAKE_CURRENT_SOURCE_DIR}/cmake/FindGlog.cmake
      ${CMAKE_CURRENT_SOURCE_DIR}/cmake/FindGTest.cmake
      ${CMAKE_CURRENT_SOURCE_DIR}/cmake/FindLAPACK.cmake
      ${CMAKE_CURRENT_SOURCE_DIR}/cmake/FindLibDL.cmake
      ${CMAKE_CURRENT_SOURCE_DIR}/cmake/FindLibm.cmake
      ${CMAKE_CURRENT_SOURCE_DIR}/cmake/FindLibnsl.cmake
      ${CMAKE_CURRENT_SOURCE_DIR}/cmake/FindLibrt.cmake
      ${CMAKE_CURRENT_SOURCE_DIR}/cmake/FindSuiteSparse.cmake
      ${CMAKE_CURRENT_SOURCE_DIR}/cmake/FindTBB.cmake
  DESTINATION ${INSTALL_CMAKE_DIR}
  COMPONENT Devel
  )

################ Sub Directories ################

# Global includes
include_directories(
  include
)

add_subdirectory(src)

install(DIRECTORY "include/infrascal" DESTINATION ${INFRASCAL_INCLUDE_INSTALL_PATH} )

# Output
set(_output_blanks "                              ")

print("")
print("---------------------------------------------------")
print("DEPENDENCY:                 Required:    Found:")
print("---------------------------------------------------")
foreach(_name ${__required_dependencies})
  string(TOUPPER ${_name} _name_upper)
  string(LENGTH ${_name} _name_length)
  math(EXPR _name_length "30 - ${_name_length}")
  string(SUBSTRING ${_output_blanks} 0 ${_name_length} _blanks)
  if(${_name_upper}_FOUND OR
     ${_name_upper}_INCLUDE_DIR OR
     ${_name_upper}_INCLUDE_DIRS OR
     ${_name_upper}_LIBRARY OR
     ${_name_upper}_LIBRARY_OPTIMIZED OR
     ${_name_upper}_LIBRARIES OR
     ${_name_upper}_LIBRARIES_OPTIMIZED)
    set(_found " yes")
  else()
    set(_found " no")
  endif()
  print("${_name}${_blanks} yes        ${_found}")
endforeach(_name)
foreach(_name ${__optional_dependencies})
  string(TOUPPER ${_name} _name_upper)
  string(LENGTH ${_name} _name_length)
  math(EXPR _name_length "30 - ${_name_length}")
  string(SUBSTRING ${_output_blanks} 0 ${_name_length} _blanks)
  if(${_name_upper}_FOUND OR
     ${_name_upper}_INCLUDE_DIR OR
     ${_name_upper}_INCLUDE_DIRS OR
     ${_name_upper}_LIBRARY OR
     ${_name_upper}_LIBRARY_OPTIMIZED OR
     ${_name_upper}_LIBRARIES OR
     ${_name_upper}_LIBRARIES_OPTIMIZED)
    set(_found " yes")
  else()
    set(_found " no")
  endif()
  print("${_name}${_blanks} no         ${_found}")
endforeach(_name)

print("")
print("---------------------------------------------------")
print("Library:                      Build:    Condition:")
print("---------------------------------------------------")
foreach(_name ${__libraries})
  string(TOUPPER ${_name} _name_upper)
  string(LENGTH ${_name} _name_length)
  math(EXPR _name_length "30 - ${_name_length}")
  string(SUBSTRING ${_output_blanks} 0 ${_name_length} _blanks)
  if(NOT ${_name_upper}_BUILD)
    set(_condition ${${_name_upper}_CONDITION})
  else()
    set(_condition " (satisfied)")
    add_dependencies(${TARGET_NAME} ${_name})
    generate_export_header(${_name})
  endif()
  print("${_name}${_blanks}${${_name_upper}_BUILD}     ${_condition}")
endforeach(_name)

print("")
print("---------------------------------------------------")
print("Executable:                   Build:    Condition:")
print("---------------------------------------------------")
foreach(_name ${__executables})
  string(TOUPPER ${_name} _name_upper)
  string(LENGTH ${_name} _name_length)
  math(EXPR _name_length "30 - ${_name_length}")
  string(SUBSTRING ${_output_blanks} 0 ${_name_length} _blanks)
  if(NOT ${_name_upper}_BUILD)
    set(_condition ${${_name_upper}_CONDITION})
  else()
    set(_condition " (satisfied)")
    add_dependencies(${TARGET_NAME} ${_name})
  endif()
  print("${_name}${_blanks}${${_name_upper}_BUILD}     ${_condition}")
endforeach(_name)

print("")
print("---------------------------------------------------")
print("Test:                         Build:    Condition:")
print("---------------------------------------------------")
foreach(_name ${__tests})
  string(TOUPPER ${_name} _name_upper)
  string(LENGTH ${_name} _name_length)
  math(EXPR _name_length "30 - ${_name_length}")
  string(SUBSTRING ${_output_blanks} 0 ${_name_length} _blanks)
  if(NOT ${_name_upper}_BUILD)
    set(_condition ${${_name_upper}_CONDITION})
  else()
    set(_condition " (satisfied)")
    add_dependencies(${TARGET_NAME} ${_name})
  endif()
  print("${_name}${_blanks}${${_name_upper}_BUILD}     ${_condition}")
endforeach(_name)

print("")



######################### Installation Stuff ###########################


INCLUDE(InstallProjectConfig)