## System Header Configuration

| Properties |
|---|
| **`SB_HAS_SYS_TYPES_H`** Whether the current platform provides the standard header sys/types.h. The default value in the Stub implementation is `0` |
| **`SB_IS_WCHAR_T_UTF32`** Type detection for wchar_t. The default value in the Stub implementation is `1` |
| **`SB_IS_WCHAR_T_UTF16`** The default value in the Stub implementation is `1` |
| **`SB_IS_WCHAR_T_UNSIGNED`** Chrome only defines this for ARMEL. Chrome has an exclusion for iOS here, we should too when we support iOS. The default value in the Stub implementation is `1` |