project(flowbench)

fdb_find_sources(FLOWBENCH_SRCS)
add_flow_target(EXECUTABLE NAME flowbench SRCS ${FLOWBENCH_SRCS})

# This stub is kept to maintain the backward compatibility with the existing build
# environment. It should be removed when a reasonable environment is established.
if(NOT benchmark_ROOT)
  if(EXISTS /opt/googlebenchmark-f91b6b AND CLANG AND USE_LIBCXX)
    set(benchmark_ROOT /opt/googlebenchmark-f91b6b)
  elseif(EXISTS /opt/googlebenchmark-f91b6b-g++ AND NOT USE_LIBCXX)
    set(benchmark_ROOT /opt/googlebenchmark-f91b6b-g++)
  endif()
endif()

find_package(benchmark)

if(benchmark_FOUND)
  target_include_directories(flowbench PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/include" "${CMAKE_CURRENT_BINARY_DIR}/include")
  target_include_directories(flowbench INTERFACE $<TARGET_PROPERTY:benchmark::benchmark, INTERFACE_INCLUDE_DIRECTORIES>)
  target_link_libraries(flowbench benchmark::benchmark)
else()
  ## This seems to be copy-pasted from the the google benchmark documentation.
  ## It breaks if you attempt to re-use a build of googlebenchmark across FDB
  ## builds.

  # include the configurations from benchmark.cmake
  configure_file(benchmark.cmake googlebenchmark-download/CMakeLists.txt)
  # executing the configuration step
  execute_process(
      COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
      RESULT_VARIABLE results
      WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googlebenchmark-download
  )
  # checking if the configuration step passed
  if(results)
      message(FATAL_ERROR "Configuration step for Benchmark has Failed. ${results}")
  endif()
  # executing the build step
  execute_process(
      COMMAND ${CMAKE_COMMAND} --build . --config Release
      RESULT_VARIABLE results
      WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googlebenchmark-download
  )
  # checking if the build step passed
  if(results)
    message(FATAL_ERROR "Build step for Benchmark has Failed. ${results}")
  endif()

  set(BENCHMARK_ENABLE_TESTING OFF)
  add_subdirectory(
    ${CMAKE_CURRENT_BINARY_DIR}/googlebenchmark-src
    ${CMAKE_CURRENT_BINARY_DIR}/googlebenchmark-build
    EXCLUDE_FROM_ALL
  )
  target_include_directories(flowbench PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/include" "${CMAKE_CURRENT_BINARY_DIR}/include"  ${CMAKE_CURRENT_BINARY_DIR}/googlebenchmark-src/include)
  target_link_libraries(flowbench benchmark)
endif()


if(FLOW_USE_ZSTD)
  target_include_directories(flowbench PRIVATE ${ZSTD_LIB_INCLUDE_DIR})
endif()
target_link_libraries(flowbench pthread flow fdbclient)