The add_dependencies command currently accepts ALIAS targets for
<target-dependencies> which resolve to the referenced target. This further
relaxes the command to accept an ALIAS <target> where the command will
add the dependencies to the target which the alias references.
Now that set_property and set_target_properties support ALIAS targets,
we need to extend support to all the target_* type commands that modify
target properties.
Relaxes target_compile_definitions, target_compile_features,
target_compile_options, target_include_directories,
target_link_directories, target_link_libraries, target_link_options,
target_precompile_headers, and target_sources to now accept ALIAS
targets. These commands set properties on the target which the alias
references.
The ALIAS_GLOBAL property is read-only, so ALIASED_TARGET should be as
well. Even when set, there is no way to read the property value, so this
change gives an explicit error for users.
Currently, getting properties from an ALIAS target retrieves the property
from the target which the alias references while setting properties results
in an error. This relaxes set_property and set_target_properties to
accept ALIAS targets and act on the referenced target, mirroring the get
behavior.
An error is raised when setting ALIAS_GLOBAL or ALIASED_TARGET on an ALIAS
target.
Closes: #19445
Arha Gatram