optinterpreter: Add a log argument to is_invalid_name

Since we're adding arguments that use the cross_ prefix but are valid
we don't want to print "warning invalid argument name!", as that will
confuse people by virtue of being wrong.

mesonbuild/optinterpreter.py

@@ -24,15 +24,16 @@ forbidden_option_names = set(coredata.builtin_options.keys())
 forbidden_prefixes = [lang + '_' for lang in compilers.all_languages] + ['b_', 'backend_']
 reserved_prefixes = ['cross_']
 
-def is_invalid_name(name: str) -> bool:
+def is_invalid_name(name: str, *, log: bool = True) -> bool:
     if name in forbidden_option_names:
         return True
     pref = name.split('_')[0] + '_'
     if pref in forbidden_prefixes:
         return True
     if pref in reserved_prefixes:
-        from . import mlog
+        if log:
-        mlog.deprecation('Option uses prefix "%s", which is reserved for Meson. This will become an error in the future.' % pref)
+            from . import mlog
+            mlog.deprecation('Option uses prefix "%s", which is reserved for Meson. This will become an error in the future.' % pref)
     return False
 
 class OptionException(mesonlib.MesonException):