1# Copyright 2019 gRPC authors. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14 15if(TARGET absl::strings) 16 # If absl is included already, skip including it. 17 # (https://github.com/grpc/grpc/issues/29608) 18elseif(gRPC_ABSL_PROVIDER STREQUAL "module") 19 if(NOT ABSL_ROOT_DIR) 20 set(ABSL_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/third_party/abseil-cpp) 21 endif() 22 if(EXISTS "${ABSL_ROOT_DIR}/CMakeLists.txt") 23 if(gRPC_INSTALL) 24 # When gRPC_INSTALL is enabled and Abseil will be built as a module, 25 # Abseil will be installed along with gRPC for convenience. 26 set(ABSL_ENABLE_INSTALL ON) 27 endif() 28 add_subdirectory(${ABSL_ROOT_DIR} third_party/abseil-cpp) 29 else() 30 message(WARNING "gRPC_ABSL_PROVIDER is \"module\" but ABSL_ROOT_DIR is wrong") 31 endif() 32 if(gRPC_INSTALL AND NOT _gRPC_INSTALL_SUPPORTED_FROM_MODULE) 33 message(WARNING "gRPC_INSTALL will be forced to FALSE because gRPC_ABSL_PROVIDER is \"module\" and CMake version (${CMAKE_VERSION}) is less than 3.13.") 34 set(gRPC_INSTALL FALSE) 35 endif() 36elseif(gRPC_ABSL_PROVIDER STREQUAL "package") 37 # Use "CONFIG" as there is no built-in cmake module for absl. 38 find_package(absl REQUIRED CONFIG) 39endif() 40set(_gRPC_FIND_ABSL "if(NOT TARGET absl::strings)\n find_package(absl CONFIG)\nendif()") 41