cmake_minimum_required(VERSION 3.0)
  
project(cnorxz)

execute_process(COMMAND bash "-c" "git rev-parse HEAD" OUTPUT_VARIABLE GIT_HASH OUTPUT_STRIP_TRAILING_WHITESPACE)
execute_process(COMMAND bash "-c" "git tag -l --sort=refname 'v*' | tail -n1" OUTPUT_VARIABLE GIT_TAG OUTPUT_STRIP_TRAILING_WHITESPACE)
execute_process(COMMAND bash "-c" "git rev-list -n 1 ${GIT_TAG}" OUTPUT_VARIABLE GIT_TAG_HASH OUTPUT_STRIP_TRAILING_WHITESPACE)
string(SUBSTRING "${GIT_TAG}" 1 -1 VERSION)
if(NOT ("${GIT_HASH}" EQUAL "${GIT_TAG_HASH}"))
  string(SUBSTRING ${GIT_HASH} 0 7 GIT_HASH_SHORT)
  set(VERSION "${VERSION}-${GIT_HASH_SHORT}")
endif()

if(CMAKE_COMPILER_IS_GNUCXX)
  if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 7.0)
    message(FATAL_ERROR "require gcc version >= 7.0")
  endif()
else()
  message(WARNING "compiler ${CMAKE_CXX_COMPILER_ID} officially not supported")
endif()

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Werror -std=c++17 -Wpedantic -O2 -march=native -faligned-new -funroll-loops -fopenmp")

enable_testing()

if(IS_ABSOLUTE "${CMAKE_INSTALL_PREFIX}")
  set(INSTALL_PATH ${CMAKE_INSTALL_PREFIX})
else()
  #set(INSTALL_PATH ${CMAKE_SOURCE_DIR}/install)
  get_filename_component(INSTALL_PATH ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_PREFIX} ABSOLUTE)
endif()
message(STATUS "found absolute install path '${INSTALL_PATH}'") 

find_package( GTest REQUIRED )
if(GTest_FOUND)
  include_directories(${GTEST_INCLUDE_DIRS})
else()
  message(FATAL_ERROR "GTest not found")
endif()

find_package(Threads REQUIRED)
if(Threads_FOUND)
  #include_directories(${Threads_INCLUDE_DIRS})
else()
  message(FATAL_ERROR "Threads not found")
endif()

if(DEFINED ENABLE_hdf5)
  set(ENABLE_hdf5 ${ENABLE_hdf5} CACHE BOOL "enable hdf5")
else()
  set(ENABLE_hdf5 TRUE CACHE BOOL "enable hdf5")
endif()

if(DEFINED ENABLE_cereal)
  set(ENABLE_cereal ${ENABLE_cereal} CACHE BOOL "enable hdf5")
else()
  set(ENABLE_cereal TRUE CACHE BOOL "enable hdf5")
endif()

find_package(cereal QUIET)
if(cereal_FOUND)
  message(STATUS "found cereal")
  if(ENABLE_cereal)
    message(STATUS "enable cereal")
    add_definitions(-DHAVE_CEREAL)
  endif()
else()
  message(STATUS "no cereal")
  if(ENABLE_cereal)
    message(FATAL_ERROR "cereal has been enabled but the cereal library has not been found")
  endif()
endif()

add_definitions(-DVERSION="${VERSION}")
add_definitions(-DGIT_COMMIT="${GIT_HASH}")
add_definitions(-DCXX_FLAGS="${CMAKE_CXX_FLAGS}")

add_subdirectory(src)