Add DEPENDS_EXPLICIT_ONLY to remove implicit dependencies

Signed-off-by: Anthony Welte <[email protected]>

Author: TonyWelte

rosidl_typesupport_fastrtps_c/cmake/rosidl_typesupport_fastrtps_c_generate_interfaces.cmake

@@ -88,7 +88,7 @@ rosidl_write_generator_arguments(
 # the search will prefer /usr/bin/python3 over /usr/bin/python3.11.  And that
 # latter functionality is only available in CMake 3.20 or later, so we need
 # at least that version.
-cmake_minimum_required(VERSION 3.20)
+cmake_minimum_required(VERSION 3.27) # Required by option DEPENDS_EXPLICIT_ONLY of add_custom_command
 cmake_policy(SET CMP0094 NEW)
 set(Python3_FIND_UNVERSIONED_NAMES FIRST)
 
@@ -102,6 +102,7 @@ add_custom_command(
   DEPENDS ${target_dependencies}
   COMMENT "Generating C type support for eProsima Fast-RTPS"
   VERBATIM
+  DEPENDS_EXPLICIT_ONLY
 )
 
 # generate header to switch between export and import for a specific package

rosidl_typesupport_fastrtps_cpp/cmake/rosidl_typesupport_fastrtps_cpp_generate_interfaces.cmake

@@ -98,7 +98,7 @@ rosidl_write_generator_arguments(
 # the search will prefer /usr/bin/python3 over /usr/bin/python3.11.  And that
 # latter functionality is only available in CMake 3.20 or later, so we need
 # at least that version.
-cmake_minimum_required(VERSION 3.20)
+cmake_minimum_required(VERSION 3.27) # Required by option DEPENDS_EXPLICIT_ONLY of add_custom_command
 cmake_policy(SET CMP0094 NEW)
 set(Python3_FIND_UNVERSIONED_NAMES FIRST)
 
@@ -113,6 +113,7 @@ add_custom_command(
   DEPENDS ${target_dependencies}
   COMMENT "Generating C++ type support for eProsima Fast-RTPS"
   VERBATIM
+  DEPENDS_EXPLICIT_ONLY
 )
 
 # generate header to switch between export and import for a specific package