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# - Find protobuf-c
# Find protobuf c implementation libraries, includes and the protoc-c compiler
# FindProtobufC was loosely based on FindProtobuf that is shipped with cmake
#
# Module defines:
# PROTOBUFC_FOUND - library, includes and compiler where found
# PROTOBUFC_INCLUDE_DIRS - include directories
# PROTOBUFC_LIBRARIES - protobuf-c libraries
# PROTOBUFC_EXECUTEABLE - protobuf-c compiler
#
# Environment variables:
# PROTOBUFC_ROOTDIR - optional - rootdir of protobuf-c installation
#
# Cache entries:
# PROTOBUFC_LIBRARY - detected protobuf-c library
# PROTOBUF_INCLUDE_DIR - detected protobuf-c include dir(s)
# PROTOBUF_COMPILER - detected protobuf-c compiler
#
####
#
# ====================================================================
# Example:
#
# find_package(ProtobufC REQUIRED)
# include_directories(${PROTOBUFC_INCLUDE_DIRS})
# include_directories(${CMAKE_CURRENT_BINARY_DIR})
# PROTOBUFC_GENERATE_C(PROTO_SOURCES PROTO_HEADERS protobuf.proto)
# add_executable(bar bar.c ${PROTO_SRCn} ${PROTO_HDRS})
# target_link_libraries(bar ${PROTOBUF_LIBRARIES})
#
# NOTE: You may need to link against pthreads, depending
# on the platform.
#
# NOTE: The PROTOBUF_GENERATE_CPP macro & add_executable() or add_library()
# calls only work properly within the same directory.
#
# ====================================================================
#=============================================================================
# Copyright 2013 Thinstuff Technologies GmbH
# Copyright 2013 Bernhard Miklautz <bmiklautz@thinstuff.at>
#
# 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.
#=============================================================================
set(PROTBUFC_SOURCE_EXTENSION "pb-c.c")
set(PROTBUFC_HEADER_EXTENSION "pb-c.h")
function(PROTOBUFC_GENERATE_C SOURCES HEADERS)
if(NOT ARGN)
message(SEND_ERROR "Error: PROTOBUFC_GENERATE_C() called without any proto files")
return()
endif(NOT ARGN)
foreach(FIL ${ARGN})
get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
get_filename_component(FIL_WE ${FIL} NAME_WE)
get_filename_component(FIL_PATH ${ABS_FIL} PATH)
list(APPEND ${SOURCES} "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.${PROTBUFC_SOURCE_EXTENSION}")
list(APPEND ${HEADERS} "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.${PROTBUFC_HEADER_EXTENSION}")
add_custom_command(
OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.${PROTBUFC_SOURCE_EXTENSION}"
"${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.${PROTBUFC_HEADER_EXTENSION}"
COMMAND ${PROTOBUFC_COMPILER}
ARGS --c_out ${CMAKE_CURRENT_BINARY_DIR} -I ${CMAKE_CURRENT_SOURCE_DIR} -I ${FIL_PATH} ${ABS_FIL}
DEPENDS ${ABS_FIL}
COMMENT "Running protobuf-c compiler on ${FIL}"
VERBATIM )
endforeach()
set_source_files_properties(${${SOURCES}} ${${HEADERS}} PROPERTIES GENERATED TRUE)
set(${SOURCES} ${${SOURCES}} PARENT_SCOPE)
set(${HEADERS} ${${HEADERS}} PARENT_SCOPE)
endfunction()
find_library(PROTOBUFC_LIBRARY
NAMES "protobuf-c"
PATHS "/usr" "/usr/local" "/opt" ENV PROTOBUFC_ROOTDIR
PATH_SUFFIXES "lib")
mark_as_advanced(PROTOBUFC_LIBRARY)
find_path(PROTOBUFC_INCLUDE_DIR
NAMES "protobuf-c.h" "google/protobuf-c/protobuf-c.h"
PATHS "/usr" "/usr/local" "/opt" ENV PROTOBUFC_ROOTDIR
PATH_SUFFIXES "include")
mark_as_advanced(PROTOBUFC_INCLUDE_DIR)
find_program(PROTOBUFC_COMPILER
NAMES "protoc" "protoc-c"
PATHS "/usr" "/usr/local" "/opt" ENV PROTOBUFC_ROOTDIR
PATH_SUFFIXES "bin")
mark_as_advanced(PROTOBUFC_COMPILER)
IF (DEFINED PROTOBUF_PROTOC_EXECUTABLE)
SET(PROTOBUFC_COMPILER "${PROTOBUF_PROTOC_EXECUTABLE}")
ENDIF (DEFINED PROTOBUF_PROTOC_EXECUTABLE)
include(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(ProtobufC DEFAULT_MSG PROTOBUFC_LIBRARY PROTOBUFC_COMPILER PROTOBUFC_INCLUDE_DIR )
if (PROTOBUFC_FOUND)
set(PROTOBUFC_LIBRARIES ${PROTOBUFC_LIBRARY})
set(PROTOBUFC_INCLUDE_DIRS ${PROTOBUFC_INCLUDE_DIR})
set(PROTOBUFC_EXECUTEABLE ${PROTOBUFC_COMPILER})
endif(PROTOBUFC_FOUND)
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