Implement errorlogs builtin option.

mesonbuild/backend/ninjabackend.py

@@ -586,6 +586,8 @@ int dummy;
         cmd = [ sys.executable, self.environment.get_build_command(), '--internal', 'test' ]
         if not self.environment.coredata.get_builtin_option('stdsplit'):
             cmd += ['--no-stdsplit']
+        if self.environment.coredata.get_builtin_option('errorlogs'):
+            cmd += ['--print-errorlogs']
         cmd += [ test_data ]
         elem = NinjaBuildElement(self.all_outputs, 'test', 'CUSTOM_COMMAND', ['all', 'PHONY'])
         elem.add_item('COMMAND', cmd)

mesonbuild/coredata.py

@@ -211,6 +211,7 @@ builtin_options = {
         'default_library'   : [ UserComboOption, 'Default library type.', [ 'shared', 'static' ], 'shared' ],
         'backend'           : [ UserComboOption, 'Backend to use.', [ 'ninja', 'vs2010', 'xcode' ], 'ninja' ],
         'stdsplit'          : [ UserBooleanOption, 'Split stdout and stderr in test logs.', True ],
+        'errorlogs'         : [ UserBooleanOption, "Whether to print the logs from failing tests.", False ],
         }
 
 forbidden_target_names = {'clean': None,