Commit 1ee20192 authored by André Apitzsch's avatar André Apitzsch Committed by Brad King

FindProtobuf: add optional export declaration macro to generated cpp files

parent 56f87f17
FindProtobuf-export-macro
-------------------------
* The :module:`FindProtobuf` module :command:`protobuf_generate_cpp`
command gained an ``EXPORT_MACRO`` option to specify the name of
a DLL export markup macro.
......@@ -76,6 +76,7 @@
# include_directories(${Protobuf_INCLUDE_DIRS})
# include_directories(${CMAKE_CURRENT_BINARY_DIR})
# protobuf_generate_cpp(PROTO_SRCS PROTO_HDRS foo.proto)
# protobuf_generate_cpp(PROTO_SRCS PROTO_HDRS EXPORT_MACRO DLL_EXPORT foo.proto)
# protobuf_generate_python(PROTO_PY foo.proto)
# add_executable(bar bar.cc ${PROTO_SRCS} ${PROTO_HDRS})
# target_link_libraries(bar ${Protobuf_LIBRARIES})
......@@ -89,12 +90,15 @@
#
# Add custom commands to process ``.proto`` files to C++::
#
# protobuf_generate_cpp (<SRCS> <HDRS> [<ARGN>...])
# protobuf_generate_cpp (<SRCS> <HDRS> [EXPORT_MACRO <MACRO>] [<ARGN>...])
#
# ``SRCS``
# Variable to define with autogenerated source files
# ``HDRS``
# Variable to define with autogenerated header files
# ``EXPORT_MACRO``
# is a macro which should expand to ``__declspec(dllexport)`` or
# ``__declspec(dllimport)`` depending on what is being compiled.
# ``ARGN``
# ``.proto`` files
#
......@@ -110,14 +114,21 @@
# ``.proto`` filess
function(PROTOBUF_GENERATE_CPP SRCS HDRS)
if(NOT ARGN)
cmake_parse_arguments(protobuf "" "EXPORT_MACRO" "" ${ARGN})
set(PROTO_FILES "${protobuf_UNPARSED_ARGUMENTS}")
if(NOT PROTO_FILES)
message(SEND_ERROR "Error: PROTOBUF_GENERATE_CPP() called without any proto files")
return()
endif()
if(protobuf_EXPORT_MACRO)
set(DLL_EXPORT_DECL "dllexport_decl=${protobuf_EXPORT_MACRO}:")
endif()
if(PROTOBUF_GENERATE_CPP_APPEND_PATH)
# Create an include path for each file specified
foreach(FIL ${ARGN})
foreach(FIL ${PROTO_FILES})
get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
get_filename_component(ABS_PATH ${ABS_FIL} PATH)
list(FIND _protobuf_include_path ${ABS_PATH} _contains_already)
......@@ -145,7 +156,7 @@ function(PROTOBUF_GENERATE_CPP SRCS HDRS)
set(${SRCS})
set(${HDRS})
foreach(FIL ${ARGN})
foreach(FIL ${PROTO_FILES})
get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
get_filename_component(FIL_WE ${FIL} NAME_WE)
if(NOT PROTOBUF_GENERATE_CPP_APPEND_PATH)
......@@ -162,7 +173,7 @@ function(PROTOBUF_GENERATE_CPP SRCS HDRS)
OUTPUT "${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} ${_protobuf_include_path} ${ABS_FIL}
ARGS "--cpp_out=${DLL_EXPORT_DECL}${CMAKE_CURRENT_BINARY_DIR}" ${_protobuf_include_path} ${ABS_FIL}
DEPENDS ${ABS_FIL} ${Protobuf_PROTOC_EXECUTABLE}
COMMENT "Running C++ protocol buffer compiler on ${FIL}"
VERBATIM )
......
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