Support for C++11 Mapping in the CMake Module

Fix for OpenDDS#1714

Support for the C++11 mapping in the CMake module. `-Lc++11` can now be
passed with `OPENDDS_IDL_OPTIONS` in `OPENDDS_TARGET_SOURCES`.

Also added a property to the target of `OPENDDS_TARGET_SOURCES` called
`OPENDDS_LANGUAGE_MAPPING` that states what mapping was used. This will
be exported if supported by CMake. Fix for
OpenDDS/pyopendds#9.

cmake/dds_idl_sources.cmake

@@ -62,25 +62,50 @@ function(opendds_target_idl_sources target)
   set(multiValueArgs TAO_IDL_FLAGS DDS_IDL_FLAGS IDL_FILES)
   cmake_parse_arguments(_arg "" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
 
+  # Language mapping usage are designated on an IDL file by IDL file basis,
+  # then at combined (or mixed together) on a target by target basis. If this
+  # target has any existing mappings set, combine those with any mappings on
+  # the IDL files. If we need to generate rules for a IDL file, then add those
+  # to the IDL file and the target.
+  get_property(language_mappings TARGET ${target}
+    PROPERTY "OPENDDS_LANGUAGE_MAPPINGS")
+  # Make sure OPENDDS_LANGUAGE_MAPPINGS is exported if supported
+  if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.12.0")
+    get_property(target_export_properties TARGET ${target}
+      PROPERTY "EXPORT_PROPERTIES")
+    if(NOT ("OPENDDS_LANGUAGE_MAPPINGS" IN_LIST target_export_properties))
+      list(APPEND target_export_properties "OPENDDS_LANGUAGE_MAPPINGS")
+      set_property(TARGET ${target} PROPERTY "EXPORT_PROPERTIES"
+        "${target_export_properties}")
+    endif()
+  endif()
+
   foreach(idl_file ${_arg_IDL_FILES})
     if (NOT IS_ABSOLUTE ${idl_file})
       set(idl_file ${CMAKE_CURRENT_LIST_DIR}/${idl_file})
     endif()
 
+    get_property(file_language_mappings SOURCE ${idl_file}
+      PROPERTY "OPENDDS_LANGUAGE_MAPPINGS")
+
     get_property(_generated_dependencies SOURCE ${idl_file}
       PROPERTY OPENDDS_IDL_GENERATED_DEPENDENCIES SET)
 
     if (_generated_dependencies)
       # If an IDL-Generation command was already created this file can safely be
       # skipped; however, the dependencies still need to be added to the target.
       opendds_target_generated_dependencies(${target} ${idl_file} ${_arg_SCOPE})
+      list(APPEND language_mappings ${file_language_mappings})
 
     else()
       list(APPEND non_generated_idl_files ${idl_file})
     endif()
   endforeach()
 
   if (NOT non_generated_idl_files)
+    list(REMOVE_DUPLICATES language_mappings)
+    set_property(TARGET ${target}
+      PROPERTY "OPENDDS_LANGUAGE_MAPPINGS" ${language_mappings})
     return()
   endif()
 
@@ -135,8 +160,11 @@ function(opendds_target_idl_sources target)
     unset(_ddsidl_cmd_arg_-GfaceTS)
     unset(_ddsidl_cmd_arg_-o)
     unset(_ddsidl_cmd_arg_-Wb,java)
+    unset(_ddsidl_cmd_arg_-Lc++11)
+    unset(file_language_mappings)
 
-    cmake_parse_arguments(_ddsidl_cmd_arg "-SI;-GfaceTS;-Wb,java" "-o" "" ${_ddsidl_flags})
+    cmake_parse_arguments(_ddsidl_cmd_arg
+      "-SI;-GfaceTS;-Wb,java;-Lc++11" "-o" "" ${_ddsidl_flags})
 
     get_filename_component(noext_name ${input} NAME_WE)
     get_filename_component(abs_filename ${input} ABSOLUTE)
@@ -162,13 +190,19 @@ function(opendds_target_idl_sources target)
       list(APPEND _cur_idl_headers ${output_prefix}C.h ${output_prefix}_TS.hpp)
       list(APPEND _cur_idl_cpp_files ${output_prefix}_TS.cpp)
       ## if this is FACE IDL, do not reprocess the original idl file throught tao_idl
+      list(APPEND file_language_mappings "FACE")
+    elseif (_ddsidl_cmd_arg_-Lc++11)
+      list(APPEND _cur_idl_headers "${output_prefix}C.h")
+      list(APPEND file_language_mappings "C++11")
     else()
       set(_cur_idl_file ${input})
+      list(APPEND file_language_mappings "C++03")
     endif()
 
     if (_ddsidl_cmd_arg_-Wb,java)
       set(_cur_java_list "${output_prefix}${file_ext}.TypeSupportImpl.java.list")
       list(APPEND file_dds_idl_flags -j)
+      list(APPEND file_language_mappings "Java")
     else()
       unset(_cur_java_list)
     endif()
@@ -200,6 +234,9 @@ function(opendds_target_idl_sources target)
     set_property(SOURCE ${abs_filename} APPEND PROPERTY
       OPENDDS_JAVA_OUTPUTS "@${_cur_java_list}")
 
+    set_property(SOURCE ${abs_filename} APPEND PROPERTY
+      OPENDDS_LANGUAGE_MAPPINGS ${file_language_mappings})
+
     if (NOT _arg_SKIP_TAO_IDL)
       tao_idl_command(${target}
         IDL_FLAGS
@@ -213,5 +250,11 @@ function(opendds_target_idl_sources target)
       OPENDDS_IDL_GENERATED_DEPENDENCIES TRUE)
 
     opendds_target_generated_dependencies(${target} ${abs_filename} ${_arg_SCOPE})
+
+    list(APPEND language_mappings ${file_language_mappings})
+    list(REMOVE_DUPLICATES language_mappings)
   endforeach()
+
+  set_property(TARGET ${target}
+    PROPERTY "OPENDDS_LANGUAGE_MAPPINGS" ${language_mappings})
 endfunction()

docs/cmake.md

@@ -29,6 +29,7 @@ which simplifies IDL compilation.
     * [Optional OpenDDS Features](#optional-opendds-features)
     * [Build-Related Options](#build-related-options)
   * [`OPENDDS_DEFAULT_NESTED`](#opendds_default_nested)
+  * [`OPENDDS_LANGUAGE_MAPPINGS`](#opendds_language_mappings)
 
 ## Requirements
 
@@ -197,6 +198,7 @@ built-in [`target_sources`](https://cmake.org/cmake/help/latest/command/target_s
   - Command-line options can be supplied to the TAO/OpenDDS IDL compilers
     using `TAO_IDL_OPTIONS` and/or `OPENDDS_IDL_OPTIONS` (if the default
     behavior is not suitable).
+    - Add `OPENDDS_IDL_OPTIONS -Lc++11` to use the C++11 IDL Mapping.
 
 When IDL sources are supplied, custom commands are generated which will
 be invoked to compile the IDL sources into their component cpp/h files.
@@ -341,3 +343,24 @@ OPENDDS_TARGET_SOURCES(messenger
   OPENDDS_IDL_OPTIONS --no-default-nested
 )
 ```
+
+### `OPENDDS_LANGUAGE_MAPPINGS`
+
+After `OPENDDS_TARGET_SOURCES` is used on a target, it will have the
+`OPENDDS_LANGUAGE_MAPPINGS` target property set. This signifies the IDL
+language mappings available in the IDL bindings generated into the target based
+on what is passed to `OPENDDS_IDL_OPTIONS`. It will be a list that can contain
+one or more of the following:
+
+ - `"C++03"`
+   - Default IDL-to-C++ mapping generated by default.
+ - `"C++11"`
+   - IDL-to-C++11 mapping available when passing `-Lc++11`.
+ - `"FACE"`
+   - Will appear if `-GfaceTS` is passed.
+ - `"Java"`
+   - Currently unsupported in the CMake module, but this will appear in the
+     list if `-Wb,java` is passed.
+
+If the CMake version is at least 3.12 then this property will exported with the
+target.

tests/DCPS/C++11/Messenger/Publisher/DDS_Cxx11_Messenger_Publisher.mpc

@@ -5,6 +5,7 @@ project: dcpsexe, dcps_test, dcps_transports_for_test{
   after    += DDS_Cxx11_Messenger_Idl
   libs     += DDS_Cxx11_Messenger_Idl
   libpaths += ../Idl
+  includes += ../Idl
 
   Source_Files {
     publisher.cpp

tests/DCPS/C++11/Messenger/Publisher/publisher.cpp

@@ -3,15 +3,15 @@
  * See: http://www.opendds.org/license.html
  */
 
-#include "../Idl/MessengerTypeSupportImpl.h"
+#include <MessengerTypeSupportImpl.h>
 
-#include "dds/DCPS/Marked_Default_Qos.h"
-#include "dds/DCPS/PublisherImpl.h"
-#include "dds/DCPS/Service_Participant.h"
-#include "dds/DCPS/StaticIncludes.h"
-#include "dds/DCPS/WaitSet.h"
+#include <dds/DCPS/Marked_Default_Qos.h>
+#include <dds/DCPS/PublisherImpl.h>
+#include <dds/DCPS/Service_Participant.h>
+#include <dds/DCPS/StaticIncludes.h>
+#include <dds/DCPS/WaitSet.h>
 
-#include "ace/Log_Msg.h"
+#include <ace/Log_Msg.h>
 
 #include <iostream>
 #include <cstdlib>

tests/DCPS/C++11/Messenger/Subscriber/DDS_Cxx11_Messenger_Subscriber.mpc

@@ -5,6 +5,7 @@ project: dcpsexe, dcps_test, dcps_transports_for_test{
   after    += DDS_Cxx11_Messenger_Idl
   libs     += DDS_Cxx11_Messenger_Idl
   libpaths += ../Idl
+  includes += ../Idl
 
   Source_Files {
     subscriber.cpp

tests/DCPS/C++11/Messenger/Subscriber/subscriber.cpp

@@ -3,15 +3,15 @@
  * See: http://www.opendds.org/license.html
  */
 
-#include "../Idl/MessengerTypeSupportImpl.h"
+#include <MessengerTypeSupportImpl.h>
 
-#include "dds/DCPS/Marked_Default_Qos.h"
-#include "dds/DCPS/PublisherImpl.h"
-#include "dds/DCPS/Service_Participant.h"
-#include "dds/DCPS/StaticIncludes.h"
-#include "dds/DCPS/WaitSet.h"
+#include <dds/DCPS/Marked_Default_Qos.h>
+#include <dds/DCPS/PublisherImpl.h>
+#include <dds/DCPS/Service_Participant.h>
+#include <dds/DCPS/StaticIncludes.h>
+#include <dds/DCPS/WaitSet.h>
 
-#include "ace/Log_Msg.h"
+#include <ace/Log_Msg.h>
 
 #include <iostream>
 #include <cstdlib>

tests/cmake_integration/Messenger/C++11_Messenger/.gitignore

@@ -0,0 +1 @@
+/build

tests/cmake_integration/Messenger/CMakeLists.txt

@@ -4,3 +4,4 @@ project(opendds_cmake_messenger_tests)
 
 add_subdirectory(Messenger_1)
 add_subdirectory(Messenger_2)
+add_subdirectory(C++11_Messenger)

tests/cmake_integration/Messenger/Messenger_1/CMakeLists.txt

@@ -56,6 +56,12 @@ foreach(t ${all_targets})
   # https://github.com/objectcomputing/OpenDDS/issues/1336
   # See https://cmake.org/cmake/help/latest/policy/CMP0023.html
   target_link_libraries(${t} PUBLIC OpenDDS::OpenDDS)
+
+  # Assert the mapping used was C++03
+  get_property(mappings TARGET ${t} PROPERTY OPENDDS_LANGUAGE_MAPPINGS)
+  if(NOT "C++03" IN_LIST mappings)
+    message(FATAL_ERROR "${t}: C++03 NOT in mapping list: ${mappings}")
+  endif()
 endforeach()
 
 # Copy configs/scripts into build-output directory