common: add --configure to make configure optional on build

build-qemu

@@ -8,6 +8,7 @@ from shell_helpers import LF
 class Main(common.BuildCliFunction):
     def __init__(self):
         super().__init__()
+        self._add_argument('--configure')
         self.add_argument(
             'extra_config_args',
             default=[],
@@ -31,6 +32,7 @@ class Main(common.BuildCliFunction):
             build_type_cmd = ['--enable-debug', LF]
         else:
             build_type_cmd = []
+        if self.env['configure']:
             self.sh.run_cmd(
                 [
                     os.path.join(self.env['qemu_source_dir'], 'configure'), LF,

common.py

@@ -1588,6 +1588,12 @@ Pass the given compiler flags to all languages (C, C++, Fortran, etc.)
                 'default': False,
                 "help": '''\
 Force rebuild even if sources didn't change.
+''',
+            },
+            '--configure': {
+                'default': True,
+                "help": '''\
+Also run the configuration step during build.
 ''',
             },
             '--optimization-level': {