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Diffstat (limited to 'third_party/cpp/googleapis/cmake/FindgRPC.cmake')
| -rw-r--r-- | third_party/cpp/googleapis/cmake/FindgRPC.cmake | 333 |
1 files changed, 333 insertions, 0 deletions
diff --git a/third_party/cpp/googleapis/cmake/FindgRPC.cmake b/third_party/cpp/googleapis/cmake/FindgRPC.cmake new file mode 100644 index 000000000000..358285b6200a --- /dev/null +++ b/third_party/cpp/googleapis/cmake/FindgRPC.cmake @@ -0,0 +1,333 @@ +# ~~~ +# Copyright 2019 Google LLC +# +# 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. +# ~~~ + +#[=======================================================================[.rst: +FindgRPC +-------- + +Locate and configure the gRPC library. + +The following variables can be set and are optional: + +``gRPC_DEBUG`` + Show debug messages. +``gRPC_USE_STATIC_LIBS`` + Set to ON to force the use of the static libraries. + Default is OFF. + +Defines the following variables: + +``gRPC_FOUND`` + Found the gRPC library +``gRPC_VERSION`` + Version of package found. + +The following :prop_tgt:`IMPORTED` targets are also defined: + +``gRPC::grpc++`` + The gRPC C++ library. +``gRPC::grpc`` + The gRPC C core library. +``gRPC::cpp_plugin`` + The C++ plugin for the Protobuf protoc compiler. + +The following cache variables are also available to set or use: + +Example: + +.. code-block:: cmake + + find_package(gRPC REQUIRED) + add_executable(bar bar.cc) + target_link_libraries(bar PRIVATE gRPC::grpc++) + +#]=======================================================================] + +if (gRPC_DEBUG) + message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] " + "gRPC_USE_STATIC_LIBS = ${gRPC_USE_STATIC_LIBS}" + " gRPC_FOUND = ${gRPC_FOUND}") +endif () + +# gRPC always requires Thread support. +find_package(Threads REQUIRED) + +# Load the module to find protobuf with proper targets. Do not use +# `find_package()` because we (have to) install this module in non-standard +# locations. +include(${CMAKE_CURRENT_LIST_DIR}/FindProtobufTargets.cmake) + +# The gRPC::grpc_cpp_plugin target is sometimes defined, but without a +# IMPORTED_LOCATION +function (_grpc_fix_grpc_cpp_plugin_target) + # The target may already exist, do not create it again if it does. + if (NOT TARGET gRPC::grpc_cpp_plugin) + add_executable(gRPC::grpc_cpp_plugin IMPORTED) + endif () + get_target_property(_gRPC_CPP_PLUGIN_EXECUTABLE gRPC::grpc_cpp_plugin + IMPORTED_LOCATION) + if (gRPC_DEBUG) + message( + STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] " + "LOCATION=${_gRPC_CPP_PLUGIN_EXECUTABLE}") + endif () + # Even if the target exists, gRPC CMake support files do not define the + # executable for the imported target (at least they do not in v1.19.1), so + # we need to define it ourselves. + if (NOT _gRPC_CPP_PLUGIN_EXECUTABLE) + find_program(_gRPC_CPP_PLUGIN_EXECUTABLE grpc_cpp_plugin + DOC "The gRPC C++ plugin for protoc") + mark_as_advanced(_gRPC_CPP_PLUGIN_EXECUTABLE) + if (_gRPC_CPP_PLUGIN_EXECUTABLE) + set_property( + TARGET gRPC::grpc_cpp_plugin + PROPERTY IMPORTED_LOCATION ${_gRPC_CPP_PLUGIN_EXECUTABLE}) + else () + set(gRPC_FOUND "grpc_cpp_plugin-NOTFOUND") + endif () + endif () +endfunction () + +# The gRPC::* targets sometimes lack the right definitions to compile cleanly on +# WIN32 +function (_grpc_fix_grpc_target_definitions) + # Including gRPC headers without this definition results in a build error. + if (WIN32) + set_property(TARGET gRPC::grpc APPEND + PROPERTY INTERFACE_COMPILE_DEFINITIONS _WIN32_WINNT=0x600) + set_property(TARGET gRPC::grpc++ APPEND + PROPERTY INTERFACE_COMPILE_DEFINITIONS _WIN32_WINNT=0x600) + endif () +endfunction () + +# First try to use the `gRPCConfig.cmake` or `grpc-config.cmake` file if it was +# installed. This is common on systems (or package managers) where gRPC was +# compiled and installed with `CMake`. +find_package(gRPC NO_MODULE QUIET) + +if (gRPC_DEBUG) + message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] " + "NO_MODULE result gRPC_FOUND = ${gRPC_FOUND}") +endif () + +if (gRPC_FOUND) + _grpc_fix_grpc_cpp_plugin_target() + _grpc_fix_grpc_target_definitions() + return() +endif () + +include(SelectLibraryConfigurations) + +# Internal function: search for normal library as well as a debug one if the +# debug one is specified also include debug/optimized keywords in *_LIBRARIES +# variable +function (_gRPC_find_library name filename) + if (${name}_LIBRARY) + # Use result recorded by a previous call. + return() + else () + find_library(${name}_LIBRARY_RELEASE NAMES ${filename}) + mark_as_advanced(${name}_LIBRARY_RELEASE) + + find_library(${name}_LIBRARY_DEBUG NAMES ${filename}d ${filename}) + mark_as_advanced(${name}_LIBRARY_DEBUG) + + select_library_configurations(${name}) + + if (gRPC_DEBUG) + message( + STATUS + "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] " + "${name} ${filename} RELEASE=${${name}_LIBRARY}" + " DEBUG=${${name}_LIBRARY_DEBUG} DEFAULT=${${name}_LIBRARY}" + ) + endif () + + set(${name}_LIBRARY + "${${name}_LIBRARY}" + PARENT_SCOPE) + endif () +endfunction () + +# +# Main +# + +# Support preference of static libs by adjusting CMAKE_FIND_LIBRARY_SUFFIXES +if (_gRPC_USE_STATIC_LIBS) + set(_gRPC_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES}) + if (WIN32) + set(CMAKE_FIND_LIBRARY_SUFFIXES .lib .a ${CMAKE_FIND_LIBRARY_SUFFIXES}) + else () + set(CMAKE_FIND_LIBRARY_SUFFIXES .a) + endif () +endif () + +_grpc_find_library(_gRPC_grpc grpc) +_grpc_find_library(_gRPC_grpc++ grpc++) + +if (NOT _gRPC_INCLUDE_DIR) + find_path(_gRPC_INCLUDE_DIR grpcpp/grpcpp.h) + mark_as_advanced(_gRPC_INCLUDE_DIR) +endif () + +if (gRPC_DEBUG) + message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] " + " _gRPC_grpc_LIBRARY = ${_gRPC_grpc_LIBRARY}") + message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] " + " _gRPC_grpc++_LIBRARY = ${_gRPC_grpc++_LIBRARY}") + message(STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] " + " _gRPC_INCLUDE_DIR = ${_gRPC_INCLUDE_DIR}") +endif () + +if (_gRPC_grpc_LIBRARY) + if (NOT TARGET gRPC::grpc) + add_library(gRPC::grpc IMPORTED UNKNOWN) + set_target_properties( + gRPC::grpc PROPERTIES INTERFACE_INCLUDE_DIRECTORIES + "${_gRPC_INCLUDE_DIR}") + if (EXISTS "${_gRPC_grpc_LIBRARY}") + set_target_properties(gRPC::grpc PROPERTIES IMPORTED_LOCATION + "${_gRPC_grpc_LIBRARY}") + endif () + if (EXISTS "${_gRPC_grpc_LIBRARY_RELEASE}") + set_property(TARGET gRPC::grpc APPEND + PROPERTY IMPORTED_CONFIGURATIONS RELEASE) + set_target_properties( + gRPC::grpc PROPERTIES IMPORTED_LOCATION_RELEASE + "${_gRPC_grpc_LIBRARY_RELEASE}") + endif () + if (EXISTS "${_gRPC_grpc_LIBRARY_DEBUG}") + set_property(TARGET gRPC::grpc APPEND + PROPERTY IMPORTED_CONFIGURATIONS DEBUG) + set_target_properties( + gRPC::grpc PROPERTIES IMPORTED_LOCATION_DEBUG + "${_gRPC_grpc_LIBRARY_DEBUG}") + endif () + set_property( + TARGET gRPC::grpc APPEND + PROPERTY INTERFACE_LINK_LIBRARIES protobuf::libprotobuf + Threads::Threads) + endif () +endif () + +if (_gRPC_grpc++_LIBRARY) + if (NOT TARGET gRPC::grpc++) + add_library(gRPC::grpc++ IMPORTED UNKNOWN) + set_target_properties( + gRPC::grpc++ PROPERTIES INTERFACE_INCLUDE_DIRECTORIES + "${_gRPC++_INCLUDE_DIR}") + if (EXISTS "${_gRPC_grpc++_LIBRARY}") + set_target_properties( + gRPC::grpc++ PROPERTIES IMPORTED_LOCATION + "${_gRPC_grpc++_LIBRARY}") + endif () + if (EXISTS "${_gRPC_grpc++_LIBRARY_RELEASE}") + set_property(TARGET gRPC::grpc++ APPEND + PROPERTY IMPORTED_CONFIGURATIONS RELEASE) + set_target_properties( + gRPC::grpc++ PROPERTIES IMPORTED_LOCATION_RELEASE + "${_gRPC_grpc++_LIBRARY_RELEASE}") + endif () + if (EXISTS "${_gRPC_grpc++_LIBRARY_DEBUG}") + set_property(TARGET gRPC::grpc++ APPEND + PROPERTY IMPORTED_CONFIGURATIONS DEBUG) + set_target_properties( + gRPC::grpc++ PROPERTIES IMPORTED_LOCATION_DEBUG + "${_gRPC_grpc++_LIBRARY_DEBUG}") + endif () + set_property( + TARGET gRPC::grpc++ APPEND + PROPERTY INTERFACE_LINK_LIBRARIES gRPC::grpc protobuf::libprotobuf + Threads::Threads) + if (CMAKE_VERSION VERSION_GREATER 3.8) + # gRPC++ requires C++11, but only CMake-3.8 introduced a target + # compiler feature to meet that requirement. + set_property(TARGET gRPC::grpc++ APPEND + PROPERTY INTERFACE_COMPILE_FEATURES cxx_std_11) + elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU") + # CMake 3.5 is still alive and kicking in some older distros, use + # the compiler-specific versions in these cases. + set_property(TARGET gRPC::grpc++ APPEND + PROPERTY INTERFACE_COMPILE_OPTIONS "-std=c++11") + elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang") + set_property(TARGET gRPC::grpc++ APPEND + PROPERTY INTERFACE_COMPILE_OPTIONS "-std=c++11") + else () + message( + WARNING + "gRPC::grpc++ requires C++11, but this module" + " (${CMAKE_CURRENT_LIST_FILE})" + " cannot enable it for the library target in your CMake and" + " compiler versions. You need to enable C++11 in the" + " CMakeLists.txt for your project. Consider filing a bug" + " so we can fix this problem.") + endif () + endif () +endif () + +# Restore original find library prefixes +if (_gRPC_USE_STATIC_LIBS) + set(CMAKE_FIND_LIBRARY_PREFIXES "${_gRPC_ORIG_FIND_LIBRARY_PREFIXES}") +endif () + +file( + WRITE "${CMAKE_BINARY_DIR}/get_gRPC_version.cc" + [====[ +#include <grpcpp/grpcpp.h> +#include <iostream> +int main() { + std::cout << grpc::Version(); // no newline to simplify CMake module + return 0; +} + ]====]) + +try_run( + _gRPC_GET_VERSION_STATUS + _gRPC_GET_VERSION_COMPILE_STATUS + "${CMAKE_BINARY_DIR}" + "${CMAKE_BINARY_DIR}/get_gRPC_version.cc" + LINK_LIBRARIES + gRPC::grpc++ + gRPC::grpc + COMPILE_OUTPUT_VARIABLE _gRPC_GET_VERSION_COMPILE_OUTPUT + RUN_OUTPUT_VARIABLE gRPC_VERSION) + +file(REMOVE "${CMAKE_BINARY_DIR}/get_gRPC_version.cc") + +_grpc_fix_grpc_cpp_plugin_target() + +if (gRPC_DEBUG) + foreach ( + _var + _gRPC_CPP_PLUGIN_EXECUTABLE + _gRPC_VERSION_RAW + _gRPC_GET_VERSION_STATUS + _gRPC_GET_VERSION_COMPILE_STATUS + _gRPC_GET_VERSION_COMPILE_OUTPUT + _gRPC_grpc_LIBRARY + _gRPC_grpc++_LIBRARY + _gRPC_INCLUDE_DIR) + message( + STATUS "[ ${CMAKE_CURRENT_LIST_FILE}:${CMAKE_CURRENT_LIST_LINE} ] " + "${_var} = ${${_var}}") + endforeach () + unset(_var) +endif () + +include(FindPackageHandleStandardArgs) +find_package_handle_standard_args(gRPC REQUIRED_VARS _gRPC_grpc_LIBRARY + _gRPC_INCLUDE_DIR VERSION_VAR gRPC_VERSION) |