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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 
     15 if("${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(${GFLAGS_ROOT_DIR} third_party/gflags)
     21     if(TARGET gflags_static)
     22       set(_gRPC_GFLAGS_LIBRARIES gflags_static)
     23       set(_gRPC_GFLAGS_INCLUDE_DIR "${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include")
     24     endif()
     25   else()
     26     message(WARNING "gRPC_GFLAGS_PROVIDER is \"module\" but GFLAGS_ROOT_DIR is wrong")
     27   endif()
     28 elseif("${gRPC_GFLAGS_PROVIDER}" STREQUAL "package")
     29   # Use "CONFIG" as there is no built-in cmake module for gflags.
     30   find_package(gflags REQUIRED CONFIG)
     31   if(TARGET gflags)
     32     set(_gRPC_GFLAGS_LIBRARIES gflags)
     33     set(_gRPC_GFLAGS_INCLUDE_DIR ${GFLAGS_INCLUDE_DIR})
     34   endif()
     35   set(_gRPC_FIND_GFLAGS "if(NOT gflags_FOUND)\n  find_package(gflags CONFIG)\nendif()")
     36 endif()
     37