Add namespaced ALIAS target to easily consume generated libraries via add_subdirectory (#605)

Signed-off-by: Silvio Traversaro <[email protected]>

Co-authored-by: Shane Loretz <[email protected]>

Author: traversaro

rosidl_generator_c/cmake/rosidl_generator_c_generate_interfaces.cmake

@@ -109,6 +109,8 @@ set(_target_suffix "__rosidl_generator_c")
 
 add_library(${rosidl_generate_interfaces_TARGET}${_target_suffix} ${rosidl_generator_c_LIBRARY_TYPE}
   ${_generated_headers} ${_generated_sources})
+add_library(${PROJECT_NAME}::${rosidl_generate_interfaces_TARGET}${_target_suffix} ALIAS
+  ${rosidl_generate_interfaces_TARGET}${_target_suffix})
 if(rosidl_generate_interfaces_LIBRARY_NAME)
   set_target_properties(${rosidl_generate_interfaces_TARGET}${_target_suffix}
     PROPERTIES OUTPUT_NAME "${rosidl_generate_interfaces_LIBRARY_NAME}${_target_suffix}")

rosidl_generator_cpp/cmake/rosidl_generator_cpp_generate_interfaces.cmake

@@ -102,6 +102,8 @@ add_custom_target(
 
 set(_target_suffix "__rosidl_generator_cpp")
 add_library(${rosidl_generate_interfaces_TARGET}${_target_suffix} INTERFACE)
+add_library(${PROJECT_NAME}::${rosidl_generate_interfaces_TARGET}${_target_suffix} ALIAS
+  ${rosidl_generate_interfaces_TARGET}${_target_suffix})
 target_include_directories(${rosidl_generate_interfaces_TARGET}${_target_suffix}
   INTERFACE
   "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/rosidl_generator_cpp>"

rosidl_typesupport_introspection_c/cmake/rosidl_typesupport_introspection_c_generate_interfaces.cmake

@@ -99,6 +99,8 @@ set(_target_suffix "__rosidl_typesupport_introspection_c")
 
 add_library(${rosidl_generate_interfaces_TARGET}${_target_suffix} ${rosidl_typesupport_introspection_c_LIBRARY_TYPE}
   ${_generated_header_files} ${_generated_source_files})
+add_library(${PROJECT_NAME}::${rosidl_generate_interfaces_TARGET}${_target_suffix} ALIAS
+  ${rosidl_generate_interfaces_TARGET}${_target_suffix})
 if(rosidl_generate_interfaces_LIBRARY_NAME)
   set_target_properties(${rosidl_generate_interfaces_TARGET}${_target_suffix}
     PROPERTIES OUTPUT_NAME "${rosidl_generate_interfaces_LIBRARY_NAME}${_target_suffix}")

rosidl_typesupport_introspection_cpp/cmake/rosidl_typesupport_introspection_cpp_generate_interfaces.cmake

@@ -92,6 +92,8 @@ set(_target_suffix "__rosidl_typesupport_introspection_cpp")
 
 add_library(${rosidl_generate_interfaces_TARGET}${_target_suffix} ${rosidl_typesupport_introspection_cpp_LIBRARY_TYPE}
   ${_generated_header_files} ${_generated_source_files})
+add_library(${PROJECT_NAME}::${rosidl_generate_interfaces_TARGET}${_target_suffix} ALIAS
+  ${rosidl_generate_interfaces_TARGET}${_target_suffix})
 if(rosidl_generate_interfaces_LIBRARY_NAME)
   set_target_properties(${rosidl_generate_interfaces_TARGET}${_target_suffix}
     PROPERTIES OUTPUT_NAME "${rosidl_generate_interfaces_LIBRARY_NAME}${_target_suffix}")