cmake/abseil-cpp.cmake

# Setup our dependency on Abseil.

set(ABSL_PROPAGATE_CXX_STD ON)

if(TARGET absl::strings)
  # If Abseil is included already, skip including it.
  # (https://github.com/protocolbuffers/protobuf/issues/10435)
elseif(protobuf_ABSL_PROVIDER STREQUAL "module")
  if(NOT ABSL_ROOT_DIR)
    set(ABSL_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/third_party/abseil-cpp)
  endif()
  if(EXISTS "${ABSL_ROOT_DIR}/CMakeLists.txt")
    if(protobuf_INSTALL)
      # When protobuf_INSTALL is enabled and Abseil will be built as a module,
      # Abseil will be installed along with protobuf for convenience.
      set(ABSL_ENABLE_INSTALL ON)
    endif()
    add_subdirectory(${ABSL_ROOT_DIR} third_party/abseil-cpp)
  else()
    message(WARNING "protobuf_ABSL_PROVIDER is \"module\" but ABSL_ROOT_DIR is wrong")
  endif()
  if(protobuf_INSTALL AND NOT _protobuf_INSTALL_SUPPORTED_FROM_MODULE)
    message(WARNING "protobuf_INSTALL will be forced to FALSE because protobuf_ABSL_PROVIDER is \"module\" and CMake version (${CMAKE_VERSION}) is less than 3.13.")
    set(protobuf_INSTALL FALSE)
  endif()
elseif(protobuf_ABSL_PROVIDER STREQUAL "package")
  # Use "CONFIG" as there is no built-in cmake module for absl.
  find_package(absl REQUIRED CONFIG)
endif()
set(_protobuf_FIND_ABSL "if(NOT TARGET absl::strings)\n  find_package(absl CONFIG)\nendif()")

set(protobuf_ABSL_USED_TARGETS
  absl::algorithm
  absl::base
  absl::bind_front
  absl::bits
  absl::cleanup
  absl::cord
  absl::core_headers
  absl::debugging
  absl::dynamic_annotations
  absl::flags
  absl::flat_hash_map
  absl::flat_hash_set
  absl::function_ref
  absl::hash
  absl::layout
  absl::memory
  absl::optional
  absl::span
  absl::status
  absl::statusor
  absl::strings
  absl::synchronization
  absl::time
  absl::utility
  absl::variant
)