[NEW Module] Find and use Google's Protocol Buffers library & compiler

Modules/FindProtobuf.cmake

@@ -0,0 +1,106 @@
+# Locate and configure the Google Protocol Buffers library.
+# Defines the following variables:
+#
+#   PROTOBUF_FOUND - Found the Google Protocol Buffers library
+#   PROTOBUF_INCLUDE_DIRS - Include directories for Google Protocol Buffers
+#   PROTOBUF_LIBRARIES - The protobuf library
+#
+# The following cache variables are also defined:
+#   PROTOBUF_LIBRARY - The protobuf library
+#   PROTOBUF_PROTOC_LIBRARY   - The protoc library
+#   PROTOBUF_INCLUDE_DIR - The include directory for protocol buffers
+#   PROTOBUF_PROTOC_EXECUTABLE - The protoc compiler
+#
+# Esben Mose Hansen <[EMAIL PROTECTED]>, (c) Ange Optimization ApS 2008
+# Adapted by Philip Lowman <[email protected]> (c) 2009
+#
+# Redistribution and use is allowed according to the terms of the BSD license.
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+#
+#====================================================================
+# Example:
+#
+# find_package(Protobuf REQUIRED)
+# include_directories(${PROTOBUF_INCLUDE_DIRS})
+#
+# include_directories(${CMAKE_CURRENT_BINARY_DIR})
+# PROTOBUF_GENERATE_CPP(PROTO_SRCS PROTO_HDRS foo.proto)
+# add_executable(bar bar.cc ${PROTO_SRCS} ${PROTO_HDRS})
+# target_link_libraries(bar ${PROTOBUF_LIBRARY})
+#
+# NOTE: You may need to link against pthreads as well depending
+# on the platform.
+#====================================================================
+
+
+#==================================================
+# PROTOBUF_GENERATE_CPP (public function)
+#   SRCS = Variable to define with autogenerated
+#          source files
+#   HDRS = Variable to define with autogenerated
+#          header files
+#   ARGN = proto files
+#==================================================
+function(PROTOBUF_GENERATE_CPP SRCS HDRS)
+  if(NOT ARGN)
+    message(SEND_ERROR "Error: PROTOBUF_GENERATE_CPP() called without any proto files")
+    return()
+  endif(NOT ARGN)
+
+  set(${SRCS})
+  set(${HDRS})
+  foreach(FIL ${ARGN})
+    get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
+    get_filename_component(FIL_WE ${FIL} NAME_WE)
+    
+    list(APPEND ${SRCS} "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.cc")
+    list(APPEND ${HDRS} "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.h")
+
+    add_custom_command(
+      OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.cc"
+             "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.h"
+      COMMAND  ${PROTOBUF_PROTOC_EXECUTABLE}
+      ARGS --cpp_out  ${CMAKE_CURRENT_BINARY_DIR} --proto_path ${CMAKE_CURRENT_SOURCE_DIR} ${ABS_FIL}
+      DEPENDS ${ABS_FIL}
+      COMMENT "Running C++ protocol buffer compiler on ${FIL}"
+      VERBATIM )
+  endforeach()
+
+  set_source_files_properties(${${SRCS}} ${${HDRS}} PROPERTIES GENERATED TRUE)
+  set(${SRCS} ${${SRCS}} PARENT_SCOPE)
+  set(${HDRS} ${${HDRS}} PARENT_SCOPE)
+endfunction()
+
+
+find_path(PROTOBUF_INCLUDE_DIR google/protobuf/service.h)
+
+# Google's provided vcproj files generate libraries with a "lib"
+# prefix on Windows
+if(WIN32)
+    set(PROTOBUF_ORIG_FIND_LIBRARY_PREFIXES "${CMAKE_FIND_LIBRARY_PREFIXES}")
+    set(CMAKE_FIND_LIBRARY_PREFIXES "lib" "")
+endif()
+
+find_library(PROTOBUF_LIBRARY NAMES protobuf
+             DOC "The Google Protocol Buffers Library"
+)
+find_library(PROTOBUF_PROTOC_LIBRARY NAMES protoc
+             DOC "The Google Protocol Buffers Compiler Library"
+)
+find_program(PROTOBUF_PROTOC_EXECUTABLE NAMES protoc
+             DOC "The Google Protocol Buffers Compiler"
+)
+
+# Restore original find library prefixes
+if(WIN32)
+    set(CMAKE_FIND_LIBRARY_PREFIXES ${PROTOBUF_ORIG_FIND_LIBRARY_PREFIXES})
+endif()
+
+include(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(PROTOBUF DEFAULT_MSG
+    PROTOBUF_LIBRARY PROTOBUF_INCLUDE_DIR)
+
+if(PROTOBUF_FOUND)
+    set(PROTOBUF_INCLUDE_DIRS ${PROTOBUF_INCLUDE_DIR})
+    set(PROTOBUF_LIBRARIES    ${PROTOBUF_LIBRARY})
+endif()