Wrong values generated of constants defined by #define for a linux header file.

[AnirbanHalder654322]

Taken from this https://github.com/torvalds/linux/blob/master/include/uapi/linux/posix_acl.h .

Input C/C++ Header

#define ACL_UNDEFINED_ID	(-1)

/* a_type field in acl_user_posix_entry_t */
#define ACL_TYPE_ACCESS		(0x8000)
#define ACL_TYPE_DEFAULT	(0x4000)

/* e_tag entry in struct posix_acl_entry */
#define ACL_USER_OBJ		(0x01)
#define ACL_USER		(0x02)
#define ACL_GROUP_OBJ		(0x04)
#define ACL_GROUP		(0x08)
#define ACL_MASK		(0x10)
#define ACL_OTHER		(0x20)

/* permissions in the e_perm field */
#define ACL_READ		(0x04)
#define ACL_WRITE		(0x02)
#define ACL_EXECUTE	(0x01)

Bindgen Invocation

$ bindgen input.h -o output.rs

Actual Results

pub const ACL_UNDEFINED_ID: i32 = -1;
pub const ACL_TYPE_ACCESS: u32 = 32768;
pub const ACL_TYPE_DEFAULT: u32 = 16384;
pub const ACL_USER_OBJ: u32 = 1;
pub const ACL_USER: u32 = 2;
pub const ACL_GROUP_OBJ: u32 = 4;
pub const ACL_GROUP: u32 = 8;
pub const ACL_MASK: u32 = 16;
pub const ACL_OTHER: u32 = 32;
pub const ACL_READ: u32 = 4;
pub const ACL_WRITE: u32 = 2;
pub const ACL_EXECUTE: u32 = 1;

Expected Results

The correct parsing and generation of the u32 value, this is plaguing few rust libc functions.

[pvdrz]

duplicate of #1594