packed type cannot transitively contain a #[repr(align)] type #2179
Description
Input C/C++ Header
#include <stdint.h> #pragma pack(push, 2) typedef struct _UART_SETTINGS { uint16_t Baudrate; uint16_t spbrg; uint16_t brgh; uint16_t parity; uint16_t stop_bits; uint8_t flow_control; /* 0- off, 1 - Simple CTS RTS */ uint8_t reserved_1; union { uint32_t bOptions; struct { unsigned invert_tx : 1; unsigned invert_rx : 1; unsigned half_duplex : 1; unsigned reserved_bits : 13; unsigned reserved_bits2 : 16; } opts; } options; } UART_SETTINGS; #pragma pack(pop) Bindgen Invocation
$ bindgen test.h >> test.rs Actual Results
error[E0588]: packed type cannot transitively contain a `#[repr(align)]` type --> src\main.rs:149:1 | 149 | / pub union _UART_SETTINGS__bindgen_ty_1 { 150 | | pub bOptions: u32, 151 | | pub opts: _UART_SETTINGS__bindgen_ty_1__bindgen_ty_1, 152 | | } | |_^ | note: `_UART_SETTINGS__bindgen_ty_1__bindgen_ty_1` has a `#[repr(align)]` attribute --> src\main.rs:156:1 | 156 | / pub struct _UART_SETTINGS__bindgen_ty_1__bindgen_ty_1 { 157 | | pub _bitfield_align_1: [u8; 0], 158 | | pub _bitfield_1: __BindgenBitfieldUnit<[u8; 4usize]>, 159 | | } | |_^ Expected Results
compile successfully. If bitfields are removed and or packed is removed this work.