diff options
Diffstat (limited to 'cmake/Modules/FindGRPC.cmake')
| -rw-r--r-- | cmake/Modules/FindGRPC.cmake | 76 |
1 files changed, 21 insertions, 55 deletions
diff --git a/cmake/Modules/FindGRPC.cmake b/cmake/Modules/FindGRPC.cmake index a559da4..2eec35b 100644 --- a/cmake/Modules/FindGRPC.cmake +++ b/cmake/Modules/FindGRPC.cmake @@ -3,21 +3,23 @@ option(ENABLE_GRPC_REFLECTION "Link to gRPC Reflection library" OFF) # FIXME(kirillbobyrev): Check if gRPC and Protobuf headers can be included at # configure time. find_package(Threads REQUIRED) -if (GRPC_INSTALL_PATH) - # This setup requires gRPC to be built from sources using CMake and installed - # to ${GRPC_INSTALL_PATH} via -DCMAKE_INSTALL_PREFIX=${GRPC_INSTALL_PATH}. - # Libraries will be linked according to gRPC build policy which generates - # static libraries when BUILD_SHARED_LIBS is Off and dynamic libraries when - # it's On (NOTE: This is a variable passed to gRPC CMake build invocation, - # LLVM's BUILD_SHARED_LIBS has no effect). - set(protobuf_MODULE_COMPATIBLE TRUE) - find_package(Protobuf CONFIG REQUIRED HINTS ${GRPC_INSTALL_PATH}) - message(STATUS "Using protobuf ${Protobuf_VERSION}") - find_package(gRPC CONFIG REQUIRED HINTS ${GRPC_INSTALL_PATH}) - message(STATUS "Using gRPC ${gRPC_VERSION}") - include_directories(${Protobuf_INCLUDE_DIRS}) +# Prefer finding gPRC through CMakeConfig and a hint can be provided via +# GRPC_INSTALL_PATH. This requires gRPC to be built and installed +# to ${GRPC_INSTALL_PATH} via -DCMAKE_INSTALL_PREFIX=${GRPC_INSTALL_PATH}. +# Libraries will be linked according to gRPC build policy which generates +# static libraries when BUILD_SHARED_LIBS is Off and dynamic libraries when +# it's On (NOTE: This is a variable passed to gRPC CMake build invocation, +# LLVM's BUILD_SHARED_LIBS has no effect). +# Package managers like Homebrew will also install Config.cmake and user can +# specify GRPC_INSTALL_PATH or CMAKE_PREFIX_PATH to locate installed package. +set(protobuf_MODULE_COMPATIBLE TRUE) +find_package(Protobuf CONFIG HINTS ${GRPC_INSTALL_PATH}) +message(STATUS "Using protobuf ${Protobuf_VERSION}") +find_package(gRPC CONFIG HINTS ${GRPC_INSTALL_PATH}) +message(STATUS "Using gRPC ${gRPC_VERSION}") +if (Protobuf_FOUND AND gRPC_FOUND) # gRPC CMake CONFIG gives the libraries slightly odd names, make them match # the conventional system-installed names. set_target_properties(protobuf::libprotobuf PROPERTIES IMPORTED_GLOBAL TRUE) @@ -32,10 +34,12 @@ if (GRPC_INSTALL_PATH) set(GRPC_CPP_PLUGIN $<TARGET_FILE:gRPC::grpc_cpp_plugin>) set(PROTOC ${Protobuf_PROTOC_EXECUTABLE}) else() - # This setup requires system-installed gRPC and Protobuf. + # Now fallback to system-installed gRPC and ProtoBuf. # We always link dynamically in this mode. While the static libraries are # usually installed, the CMake files telling us *which* static libraries to # link are not. + # FIXME: this path should not work on newer grpc versions and should be + # removed in favor of `find_package` implementation. if (NOT BUILD_SHARED_LIBS) message(NOTICE "gRPC and Protobuf will be linked dynamically. If you want static linking, build gRPC from sources with -DBUILD_SHARED_LIBS=Off.") endif() @@ -44,55 +48,17 @@ else() if (NOT GRPC_CPP_PLUGIN OR NOT PROTOC) message(FATAL_ERROR "gRPC C++ Plugin and Protoc must be on $PATH for gRPC-enabled build.") endif() - # On macOS the libraries are typically installed via Homebrew and are not on - # the system path. - set(GRPC_OPTS "") - set(PROTOBUF_OPTS "") - set(GRPC_INCLUDE_PATHS "") - if (${APPLE}) - find_program(HOMEBREW brew) - # If Homebrew is not found, the user might have installed libraries - # manually. Fall back to the system path. - if (HOMEBREW) - execute_process(COMMAND ${HOMEBREW} --prefix grpc - OUTPUT_VARIABLE GRPC_HOMEBREW_PATH - RESULT_VARIABLE GRPC_HOMEBREW_RETURN_CODE - OUTPUT_STRIP_TRAILING_WHITESPACE) - execute_process(COMMAND ${HOMEBREW} --prefix protobuf - OUTPUT_VARIABLE PROTOBUF_HOMEBREW_PATH - RESULT_VARIABLE PROTOBUF_HOMEBREW_RETURN_CODE - OUTPUT_STRIP_TRAILING_WHITESPACE) - execute_process(COMMAND ${HOMEBREW} --prefix abseil - OUTPUT_VARIABLE ABSL_HOMEBREW_PATH - RESULT_VARIABLE ABSL_HOMEBREW_RETURN_CODE - OUTPUT_STRIP_TRAILING_WHITESPACE) - # If either library is not installed via Homebrew, fall back to the - # system path. - if (GRPC_HOMEBREW_RETURN_CODE EQUAL "0") - list(APPEND GRPC_INCLUDE_PATHS ${GRPC_HOMEBREW_PATH}/include) - list(APPEND GRPC_OPTS PATHS ${GRPC_HOMEBREW_PATH}/lib NO_DEFAULT_PATH) - endif() - if (PROTOBUF_HOMEBREW_RETURN_CODE EQUAL "0") - list(APPEND GRPC_INCLUDE_PATHS ${PROTOBUF_HOMEBREW_PATH}/include) - list(APPEND PROTOBUF_OPTS PATHS ${PROTOBUF_HOMEBREW_PATH}/lib NO_DEFAULT_PATH) - endif() - if (ABSL_HOMEBREW_RETURN_CODE EQUAL "0") - list(APPEND GRPC_INCLUDE_PATHS ${ABSL_HOMEBREW_PATH}/include) - endif() - endif() - endif() if(NOT TARGET grpc++) - find_library(GRPC_LIBRARY grpc++ ${GRPC_OPTS} REQUIRED) + find_library(GRPC_LIBRARY grpc++ REQUIRED) add_library(grpc++ UNKNOWN IMPORTED GLOBAL) message(STATUS "Using grpc++: " ${GRPC_LIBRARY}) set_target_properties(grpc++ PROPERTIES IMPORTED_LOCATION ${GRPC_LIBRARY}) - target_include_directories(grpc++ INTERFACE ${GRPC_INCLUDE_PATHS}) if (ENABLE_GRPC_REFLECTION) - find_library(GRPC_REFLECTION_LIBRARY grpc++_reflection ${GRPC_OPTS} REQUIRED) + find_library(GRPC_REFLECTION_LIBRARY grpc++_reflection REQUIRED) add_library(grpc++_reflection UNKNOWN IMPORTED GLOBAL) set_target_properties(grpc++_reflection PROPERTIES IMPORTED_LOCATION ${GRPC_REFLECTION_LIBRARY}) endif() - find_library(PROTOBUF_LIBRARY protobuf ${PROTOBUF_OPTS} REQUIRED) + find_library(PROTOBUF_LIBRARY protobuf REQUIRED) message(STATUS "Using protobuf: " ${PROTOBUF_LIBRARY}) add_library(protobuf UNKNOWN IMPORTED GLOBAL) set_target_properties(protobuf PROPERTIES IMPORTED_LOCATION ${PROTOBUF_LIBRARY}) |