1 files changed, 15 insertions, 0 deletions
diff --git a/mesonbuild/mconf.py b/mesonbuild/mconf.py
index cadd306..9a11332 100644
--- a/mesonbuild/mconf.py
+++ b/mesonbuild/mconf.py
@@ -19,6 +19,7 @@ from . import (coredata, mesonlib, build)
 
 def buildparser():
     parser = argparse.ArgumentParser(prog='meson configure')
+    coredata.register_builtin_arguments(parser)
 
     parser.add_argument('-D', action='append', default=[], dest='sets',
                         help='Set an option to the given value.')
@@ -28,6 +29,19 @@ def buildparser():
     return parser
 
 
+def filter_builtin_options(args, original_args):
+    """Filter out any args passed with -- instead of -D."""
+    for arg in original_args:
+        if not arg.startswith('--') or arg == '--clearcache':
+            continue
+        name = arg.lstrip('--').split('=', 1)[0]
+        if any([a.startswith(name + '=') for a in args.sets]):
+            raise mesonlib.MesonException(
+                'Got argument {0} as both -D{0} and --{0}. Pick one.'.format(name))
+        args.sets.append('{}={}'.format(name, getattr(args, name)))
+        delattr(args, name)
+
+
 class ConfException(mesonlib.MesonException):
     pass
 
@@ -229,6 +243,7 @@ def run(args):
     if not args:
         args = [os.getcwd()]
     options = buildparser().parse_args(args)
+    filter_builtin_options(options, args)
     if len(options.directory) > 1:
         print('%s <build directory>' % args[0])
         print('If you omit the build directory, the current directory is substituted.')