# Copyright 2017 gRPC authors. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. find_package(re2 QUIET CONFIG) if(re2_FOUND) message(STATUS "Found RE2 via CMake.") return() endif() # As per https://github.com/grpc/grpc/issues/25434, idempotence is necessary # because CMake fails when another target with the same name already exists. if(TARGET re2::re2) message(STATUS "Found RE2 via pkg-config already?") return() endif() find_package(PkgConfig REQUIRED) # TODO(junyer): Use the IMPORTED_TARGET option whenever CMake 3.6 (or newer) # becomes the minimum required: that will take care of the add_library() and # set_property() calls; then we can simply alias PkgConfig::RE2 as re2::re2. # For now, we can only set INTERFACE_* properties that existed in CMake 3.5. pkg_check_modules(RE2 QUIET re2) if(RE2_FOUND) set(re2_FOUND "${RE2_FOUND}") add_library(re2::re2 INTERFACE IMPORTED) if(RE2_INCLUDE_DIRS) set_property(TARGET re2::re2 PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${RE2_INCLUDE_DIRS}") endif() if(RE2_CFLAGS_OTHER) # Filter out the -std flag, which is handled by CMAKE_CXX_STANDARD. # TODO(junyer): Use the FILTER option whenever CMake 3.6 (or newer) # becomes the minimum required: that will allow this to be concise. foreach(flag IN LISTS RE2_CFLAGS_OTHER) if("${flag}" MATCHES "^-std=") list(REMOVE_ITEM RE2_CFLAGS_OTHER "${flag}") endif() endforeach() set_property(TARGET re2::re2 PROPERTY INTERFACE_COMPILE_OPTIONS "${RE2_CFLAGS_OTHER}") endif() if(RE2_LDFLAGS) set_property(TARGET re2::re2 PROPERTY INTERFACE_LINK_LIBRARIES "${RE2_LDFLAGS}") endif() message(STATUS "Found RE2 via pkg-config.") return() endif() if(re2_FIND_REQUIRED) message(FATAL_ERROR "Failed to find RE2.") elseif(NOT re2_FIND_QUIETLY) message(WARNING "Failed to find RE2.") endif()