Initial set of files.

The make install target is not working for .proto files, but otherwise
it seems to work.

1 files changed, 343 insertions, 0 deletions

diff --git a/cmake/FindgRPC.cmake b/cmake/FindgRPC.cmake
new file mode 100644
index 000000000000..5895cf067cc1
--- /dev/null
+++ b/cmake/FindgRPC.cmake
@@ -0,0 +1,343 @@
+# ~~~
+# 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 = ${_gRPC_INCLUDE_DIR}")
+endif ()
+
+if (_gRPC_grpc_LIBRARY)
+    if (NOT TARGET gRPC::grpc)
+        add_library(gRPC::grpc UNKNOWN IMPORTED)
+        set_target_properties(gRPC::grpc
+                              PROPERTIES INTERFACE_INCLUDE_DIRECTORIES
+                                         "${_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++ UNKNOWN IMPORTED)
+        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)