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1# Copyright 2017 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(gRPC_GFLAGS_PROVIDER STREQUAL "module")
16  if(NOT GFLAGS_ROOT_DIR)
17    set(GFLAGS_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/third_party/gflags)
18  endif()
19  if(EXISTS "${GFLAGS_ROOT_DIR}/CMakeLists.txt")
20    add_subdirectory(${GFLAGS_ROOT_DIR} third_party/gflags)
21    set(_gRPC_GFLAGS_LIBRARIES gflags::gflags)
22  else()
23    message(WARNING "gRPC_GFLAGS_PROVIDER is \"module\" but GFLAGS_ROOT_DIR is wrong")
24  endif()
25elseif(gRPC_GFLAGS_PROVIDER STREQUAL "package")
26  # Use "CONFIG" as there is no built-in cmake module for gflags.
27  find_package(gflags REQUIRED CONFIG)
28  if(TARGET gflags::gflags)
29    set(_gRPC_GFLAGS_LIBRARIES gflags::gflags)
30  endif()
31  set(_gRPC_FIND_GFLAGS "if(NOT gflags_FOUND)\n  find_package(gflags CONFIG)\nendif()")
32elseif(gRPC_GFLAGS_PROVIDER STREQUAL "none")
33  # gflags is a test-only dependency and can be avoided if we're not building tests.
34endif()
35