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