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# Copyright 2018 Google
#
# 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.
include(ExternalProject)
include(external/c-ares)
include(external/protobuf)
include(external/zlib)
if(TARGET grpc)
return()
endif()
if(GRPC_ROOT)
# If the user has supplied a GRPC_ROOT then just use it. Add an empty custom
# target so that the superbuild dependencies still work.
add_custom_target(grpc)
return()
endif()
set(
CMAKE_ARGS
-DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
-DBUILD_SHARED_LIBS:BOOL=OFF
-DgRPC_INSTALL:BOOL=OFF
-DgRPC_BUILD_TESTS:BOOL=OFF
# TODO(rsgowman): We're currently building nanopb twice; once via grpc, and
# once via nanopb. The version from grpc is the one that actually ends up
# being used. We need to fix this such that either:
# a) we instruct grpc to use our nanopb
# b) we rely on grpc's nanopb instead of using our own.
# For now, we'll pass in the necessary nanopb cflags into grpc. (We require
# 16 bit fields. Without explicitly requesting this, nanopb uses 8 bit
# fields.)
-DCMAKE_C_FLAGS=-DPB_FIELD_16BIT
-DCMAKE_CXX_FLAGS=-DPB_FIELD_16BIT
)
## c-ares
if(NOT c-ares_DIR)
set(c-ares_DIR ${FIREBASE_INSTALL_DIR}/lib/cmake/c-ares)
endif()
list(
APPEND CMAKE_ARGS
-DgRPC_CARES_PROVIDER:STRING=package
-Dc-ares_DIR:PATH=${c-ares_DIR}
)
## protobuf
# Unlike other dependencies of gRPC, we control the protobuf version because we
# have checked-in protoc outputs that must match the runtime.
# The location where protobuf-config.cmake will be installed varies by platform
if(NOT Protobuf_DIR)
if(WIN32)
set(Protobuf_DIR "${FIREBASE_INSTALL_DIR}/cmake")
else()
set(Protobuf_DIR "${FIREBASE_INSTALL_DIR}/lib/cmake/protobuf")
endif()
endif()
list(
APPEND CMAKE_ARGS
-DgRPC_PROTOBUF_PROVIDER:STRING=package
-DgRPC_PROTOBUF_PACKAGE_TYPE:STRING=CONFIG
-DProtobuf_DIR:PATH=${Protobuf_DIR}
)
## zlib
# cmake/external/zlib.cmake figures out whether or not to build zlib. Either
# way, from the gRPC build's point of view it's a package.
list(
APPEND CMAKE_ARGS
-DgRPC_ZLIB_PROVIDER:STRING=package
)
if(ZLIB_FOUND)
# Propagate possible user configuration to FindZLIB.cmake in the sub-build.
list(
APPEND CMAKE_ARGS
-DZLIB_INCLUDE_DIR=${ZLIB_INCLUDE_DIR}
-DZLIB_LIBRARY=${ZLIB_LIBRARY}
)
endif()
ExternalProject_Add(
grpc-download
DEPENDS
c-ares
protobuf
zlib
DOWNLOAD_DIR ${FIREBASE_DOWNLOAD_DIR}
DOWNLOAD_NAME grpc-1.8.3.tar.gz
URL https://github.com/grpc/grpc/archive/v1.8.3.tar.gz
URL_HASH SHA256=c14bceddc6475a09927a815811a8161cdfa7acb445262835da6bc24da9842c92
PREFIX ${PROJECT_BINARY_DIR}
SOURCE_DIR ${PROJECT_BINARY_DIR}/src/grpc
CONFIGURE_COMMAND ""
BUILD_COMMAND ""
TEST_COMMAND ""
INSTALL_COMMAND ""
)
# gRPC depends upon these projects, so from an IWYU point of view should
# include these files. Unfortunately gRPC's build requires these to be
# subdirectories in its own source tree and CMake's ExternalProject download
# step clears the source tree so these must be declared to depend upon the grpc
# target. ExternalProject dependencies must already exist when declared so
# these must come after the ExternalProject_Add block above.
include(external/boringssl)
ExternalProject_Add(
grpc
DEPENDS
boringssl
grpc-download
PREFIX ${PROJECT_BINARY_DIR}
SOURCE_DIR ${PROJECT_BINARY_DIR}/src/grpc
CMAKE_ARGS
${CMAKE_ARGS}
BUILD_COMMAND
${CMAKE_COMMAND} --build . --target grpc
UPDATE_COMMAND ""
TEST_COMMAND ""
INSTALL_COMMAND ""
)
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