CLANG_CONFIG_FILE_SYSTEM_DIR respectively. The first file found is used. It is
an error if the required file cannot be found.
+If no explicit configuration file is specified, Clang searches for a default
+configuration file following the rules described in the next paragraphs.
+To disable this behavior, `--no-default-config` flag can be used.
+
Another way to specify a configuration file is to encode it in executable name.
For example, if the Clang executable is named `armv7l-clang` (it may be a
symbolic link to `clang`), then Clang will search for file `armv7l.cfg` in the
def compatibility__version : JoinedOrSeparate<["-"], "compatibility_version">;
def config : Separate<["--"], "config">, Flags<[NoXarchOption]>,
HelpText<"Specifies configuration file">;
+def no_default_config : Flag<["--"], "no-default-config">, Flags<[NoXarchOption]>,
+ HelpText<"Disable loading default configuration files">;
def config_system_dir_EQ : Joined<["--"], "config-system-dir=">, Flags<[NoXarchOption, HelpHidden]>,
HelpText<"System directory for configuration files">;
def config_user_dir_EQ : Joined<["--"], "config-user-dir=">, Flags<[NoXarchOption, HelpHidden]>,
}
}
- // If config file is not specified explicitly, try to deduce configuration
- // from executable name. For instance, an executable 'armv7l-clang' will
- // search for config file 'armv7l-clang.cfg'.
- if (CfgFileName.empty() && !ClangNameParts.TargetPrefix.empty())
- CfgFileName = ClangNameParts.TargetPrefix + '-' + ClangNameParts.ModeSuffix;
+ if (!(CLOptions && CLOptions->hasArg(options::OPT_no_default_config))) {
+ // If config file is not specified explicitly, try to deduce configuration
+ // from executable name. For instance, an executable 'armv7l-clang' will
+ // search for config file 'armv7l-clang.cfg'.
+ if (CfgFileName.empty() && !ClangNameParts.TargetPrefix.empty())
+ CfgFileName =
+ ClangNameParts.TargetPrefix + '-' + ClangNameParts.ModeSuffix;
+ }
if (CfgFileName.empty())
return false;
// RUN: %t/testdmode/qqq-clang-g++ --config-system-dir=%S/Inputs/config --config-user-dir= --config i386-qqq -c -no-canonical-prefixes -### %s 2>&1 | FileCheck %s -check-prefix CHECK-EXPLICIT
//
// CHECK-EXPLICIT: Configuration file: {{.*}}/Inputs/config/i386-qqq.cfg
+
+//--- --no-default-config disables config search.
+//
+// RUN: %t/testdmode/qqq-clang-g++ --config-system-dir= --config-user-dir=%t/testdmode --no-default-config -c -### %s 2>&1 | FileCheck %s -check-prefix NO-DEFAULT-CONFIG
//
+// NO-DEFAULT-CONFIG-NOT: Configuration file:
+
//--- Invocation qqq-clang-g++ tries to find config file qqq.cfg if qqq-clang-g++.cfg is not found.
//
// RUN: rm %t/testdmode/qqq-clang-g++.cfg