cmake_minimum_required(VERSION 3.10)
project(voxel_grid)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
include(CTest)

# # Check for sys/time.h
# check_include_file(sys/time.h HAVE_SYS_TIME_H)
# if (HAVE_SYS_TIME_H)
#   add_definitions(-DHAVE_SYS_TIME_H)
# endif (HAVE_SYS_TIME_H)

# Include directories
include_directories(  
  include
  ${GTEST_INCLUDE_DIRS}
  )

# Library
add_library(voxel_grid SHARED src/voxel_grid.cpp)

target_include_directories(voxel_grid
    PUBLIC
        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
        $<INSTALL_INTERFACE:include/${PROJECT_NAME}>
)

# Install targets
install(TARGETS voxel_grid
  EXPORT voxel_grid
  ARCHIVE DESTINATION lib
  LIBRARY DESTINATION lib
  RUNTIME DESTINATION bin
  INCLUDES DESTINATION include
)

# Install headers
install(DIRECTORY include/${PROJECT_NAME}/
  DESTINATION include/${PROJECT_NAME}
)

# Testing
enable_testing()

# Find Google Test
find_package(GTest QUIET)
if(GTest_FOUND OR GTEST_FOUND)
  # Find pthread (required for GTest)
  find_package(Threads REQUIRED)
  
  include_directories(${GTEST_INCLUDE_DIRS})
  add_executable(voxel_grid_tests test/voxel_grid_tests.cpp)
  target_link_libraries(voxel_grid_tests
    voxel_grid
    ${GTEST_LIBRARIES}
    Threads::Threads
  )
  add_test(NAME voxel_grid_tests COMMAND voxel_grid_tests)
else()
  message(STATUS "Google Test not found. Tests will not be built.")
endif()