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Fix baud rate constants for glibc 2.42 and up.
In glibc 2.42, baud rate constants changed. Their value is now simply the baud rate as integer. Additionally, the `tcset{i,o,}speed` function accepts any arbitrary baud rate, and the `tcget{i,o,}speed` can return any arbitrary baud rate. On MIPS and SPARC, the termios struct from glibc now also has the `c_ispeed` and `c_ospeed` fields.
1 parent 61b722e commit 4c92494

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18 files changed

+708
-558
lines changed

18 files changed

+708
-558
lines changed

‎build.rs‎

Lines changed: 30 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -24,6 +24,7 @@ const ALLOWED_CFGS: &[&str] = &[
2424
// Corresponds to `__USE_TIME_BITS64` in UAPI
2525
"linux_time_bits64",
2626
"musl_v1_2_3",
27+
"gnu_simple_baud_rates",
2728
];
2829

2930
// Extra values to allow for check-cfg.
@@ -139,6 +140,11 @@ fn main() {
139140
}
140141
}
141142

143+
#[cfg(target_env = "gnu")]
144+
if have_symbol("GLIBC_2.42") {
145+
set_cfg("gnu_simple_baud_rates");
146+
}
147+
142148
// On CI: deny all warnings
143149
if libc_ci {
144150
set_cfg("libc_deny_warnings");
@@ -288,6 +294,30 @@ fn emcc_version_code() -> Option<u64> {
288294
Some(major * 10000 + minor * 100 + patch)
289295
}
290296

297+
298+
/// Check if a symbol is available in the current process.
299+
///
300+
/// This can be used to detect properties of the system libc at build time.
301+
#[cfg(target_env = "gnu")]
302+
fn have_symbol(symbol: &str) -> bool {
303+
use std::ffi::CString;
304+
use std::os::raw::{c_char, c_void};
305+
extern "C" {
306+
fn dlerror() -> *const c_void;
307+
fn dlsym(handle: *const c_void, symbol: *const c_char) -> *const c_void;
308+
}
309+
let symbol = CString::new(symbol).unwrap();
310+
unsafe {
311+
// Clear any error from previous dlopen/dlsym calls.
312+
dlerror();
313+
// Try to load the symbol.
314+
// The symbol could be present but null, so ignore the return value.
315+
dlsym(std::ptr::null(), symbol.as_ptr());
316+
// Check that there is no new error.
317+
dlerror().is_null()
318+
}
319+
}
320+
291321
fn set_cfg(cfg: &str) {
292322
assert!(
293323
ALLOWED_CFGS.contains(&cfg),

‎src/unix/linux_like/linux/gnu/b32/arm/mod.rs‎

Lines changed: 37 additions & 33 deletions
Original file line numberDiff line numberDiff line change
@@ -496,39 +496,43 @@ pub const FFDLY: crate::tcflag_t = 0o100000;
496496
pub const VTDLY: crate::tcflag_t = 0o040000;
497497
pub const XTABS: crate::tcflag_t = 0o014000;
498498

499-
pub const B0: crate::speed_t = 0o000000;
500-
pub const B50: crate::speed_t = 0o000001;
501-
pub const B75: crate::speed_t = 0o000002;
502-
pub const B110: crate::speed_t = 0o000003;
503-
pub const B134: crate::speed_t = 0o000004;
504-
pub const B150: crate::speed_t = 0o000005;
505-
pub const B200: crate::speed_t = 0o000006;
506-
pub const B300: crate::speed_t = 0o000007;
507-
pub const B600: crate::speed_t = 0o000010;
508-
pub const B1200: crate::speed_t = 0o000011;
509-
pub const B1800: crate::speed_t = 0o000012;
510-
pub const B2400: crate::speed_t = 0o000013;
511-
pub const B4800: crate::speed_t = 0o000014;
512-
pub const B9600: crate::speed_t = 0o000015;
513-
pub const B19200: crate::speed_t = 0o000016;
514-
pub const B38400: crate::speed_t = 0o000017;
515-
pub const EXTA: crate::speed_t = B19200;
516-
pub const EXTB: crate::speed_t = B38400;
517-
pub const B57600: crate::speed_t = 0o010001;
518-
pub const B115200: crate::speed_t = 0o010002;
519-
pub const B230400: crate::speed_t = 0o010003;
520-
pub const B460800: crate::speed_t = 0o010004;
521-
pub const B500000: crate::speed_t = 0o010005;
522-
pub const B576000: crate::speed_t = 0o010006;
523-
pub const B921600: crate::speed_t = 0o010007;
524-
pub const B1000000: crate::speed_t = 0o010010;
525-
pub const B1152000: crate::speed_t = 0o010011;
526-
pub const B1500000: crate::speed_t = 0o010012;
527-
pub const B2000000: crate::speed_t = 0o010013;
528-
pub const B2500000: crate::speed_t = 0o010014;
529-
pub const B3000000: crate::speed_t = 0o010015;
530-
pub const B3500000: crate::speed_t = 0o010016;
531-
pub const B4000000: crate::speed_t = 0o010017;
499+
cfg_if! {
500+
if #[cfg(not(gnu_simple_baud_rates))] {
501+
pub const B0: crate::speed_t = 0o000000;
502+
pub const B50: crate::speed_t = 0o000001;
503+
pub const B75: crate::speed_t = 0o000002;
504+
pub const B110: crate::speed_t = 0o000003;
505+
pub const B134: crate::speed_t = 0o000004;
506+
pub const B150: crate::speed_t = 0o000005;
507+
pub const B200: crate::speed_t = 0o000006;
508+
pub const B300: crate::speed_t = 0o000007;
509+
pub const B600: crate::speed_t = 0o000010;
510+
pub const B1200: crate::speed_t = 0o000011;
511+
pub const B1800: crate::speed_t = 0o000012;
512+
pub const B2400: crate::speed_t = 0o000013;
513+
pub const B4800: crate::speed_t = 0o000014;
514+
pub const B9600: crate::speed_t = 0o000015;
515+
pub const B19200: crate::speed_t = 0o000016;
516+
pub const B38400: crate::speed_t = 0o000017;
517+
pub const EXTA: crate::speed_t = B19200;
518+
pub const EXTB: crate::speed_t = B38400;
519+
pub const B57600: crate::speed_t = 0o010001;
520+
pub const B115200: crate::speed_t = 0o010002;
521+
pub const B230400: crate::speed_t = 0o010003;
522+
pub const B460800: crate::speed_t = 0o010004;
523+
pub const B500000: crate::speed_t = 0o010005;
524+
pub const B576000: crate::speed_t = 0o010006;
525+
pub const B921600: crate::speed_t = 0o010007;
526+
pub const B1000000: crate::speed_t = 0o010010;
527+
pub const B1152000: crate::speed_t = 0o010011;
528+
pub const B1500000: crate::speed_t = 0o010012;
529+
pub const B2000000: crate::speed_t = 0o010013;
530+
pub const B2500000: crate::speed_t = 0o010014;
531+
pub const B3000000: crate::speed_t = 0o010015;
532+
pub const B3500000: crate::speed_t = 0o010016;
533+
pub const B4000000: crate::speed_t = 0o010017;
534+
}
535+
};
532536

533537
pub const VEOL: usize = 11;
534538
pub const VEOL2: usize = 16;

‎src/unix/linux_like/linux/gnu/b32/csky/mod.rs‎

Lines changed: 37 additions & 33 deletions
Original file line numberDiff line numberDiff line change
@@ -392,39 +392,43 @@ pub const FFDLY: crate::tcflag_t = 0o100000;
392392
pub const VTDLY: crate::tcflag_t = 0o040000;
393393
pub const XTABS: crate::tcflag_t = 0o014000;
394394

395-
pub const B0: crate::speed_t = 0o000000;
396-
pub const B50: crate::speed_t = 0o000001;
397-
pub const B75: crate::speed_t = 0o000002;
398-
pub const B110: crate::speed_t = 0o000003;
399-
pub const B134: crate::speed_t = 0o000004;
400-
pub const B150: crate::speed_t = 0o000005;
401-
pub const B200: crate::speed_t = 0o000006;
402-
pub const B300: crate::speed_t = 0o000007;
403-
pub const B600: crate::speed_t = 0o000010;
404-
pub const B1200: crate::speed_t = 0o000011;
405-
pub const B1800: crate::speed_t = 0o000012;
406-
pub const B2400: crate::speed_t = 0o000013;
407-
pub const B4800: crate::speed_t = 0o000014;
408-
pub const B9600: crate::speed_t = 0o000015;
409-
pub const B19200: crate::speed_t = 0o000016;
410-
pub const B38400: crate::speed_t = 0o000017;
411-
pub const EXTA: crate::speed_t = B19200;
412-
pub const EXTB: crate::speed_t = B38400;
413-
pub const B57600: crate::speed_t = 0o010001;
414-
pub const B115200: crate::speed_t = 0o010002;
415-
pub const B230400: crate::speed_t = 0o010003;
416-
pub const B460800: crate::speed_t = 0o010004;
417-
pub const B500000: crate::speed_t = 0o010005;
418-
pub const B576000: crate::speed_t = 0o010006;
419-
pub const B921600: crate::speed_t = 0o010007;
420-
pub const B1000000: crate::speed_t = 0o010010;
421-
pub const B1152000: crate::speed_t = 0o010011;
422-
pub const B1500000: crate::speed_t = 0o010012;
423-
pub const B2000000: crate::speed_t = 0o010013;
424-
pub const B2500000: crate::speed_t = 0o010014;
425-
pub const B3000000: crate::speed_t = 0o010015;
426-
pub const B3500000: crate::speed_t = 0o010016;
427-
pub const B4000000: crate::speed_t = 0o010017;
395+
cfg_if! {
396+
if #[cfg(not(gnu_simple_baud_rates))] {
397+
pub const B0: crate::speed_t = 0o000000;
398+
pub const B50: crate::speed_t = 0o000001;
399+
pub const B75: crate::speed_t = 0o000002;
400+
pub const B110: crate::speed_t = 0o000003;
401+
pub const B134: crate::speed_t = 0o000004;
402+
pub const B150: crate::speed_t = 0o000005;
403+
pub const B200: crate::speed_t = 0o000006;
404+
pub const B300: crate::speed_t = 0o000007;
405+
pub const B600: crate::speed_t = 0o000010;
406+
pub const B1200: crate::speed_t = 0o000011;
407+
pub const B1800: crate::speed_t = 0o000012;
408+
pub const B2400: crate::speed_t = 0o000013;
409+
pub const B4800: crate::speed_t = 0o000014;
410+
pub const B9600: crate::speed_t = 0o000015;
411+
pub const B19200: crate::speed_t = 0o000016;
412+
pub const B38400: crate::speed_t = 0o000017;
413+
pub const EXTA: crate::speed_t = B19200;
414+
pub const EXTB: crate::speed_t = B38400;
415+
pub const B57600: crate::speed_t = 0o010001;
416+
pub const B115200: crate::speed_t = 0o010002;
417+
pub const B230400: crate::speed_t = 0o010003;
418+
pub const B460800: crate::speed_t = 0o010004;
419+
pub const B500000: crate::speed_t = 0o010005;
420+
pub const B576000: crate::speed_t = 0o010006;
421+
pub const B921600: crate::speed_t = 0o010007;
422+
pub const B1000000: crate::speed_t = 0o010010;
423+
pub const B1152000: crate::speed_t = 0o010011;
424+
pub const B1500000: crate::speed_t = 0o010012;
425+
pub const B2000000: crate::speed_t = 0o010013;
426+
pub const B2500000: crate::speed_t = 0o010014;
427+
pub const B3000000: crate::speed_t = 0o010015;
428+
pub const B3500000: crate::speed_t = 0o010016;
429+
pub const B4000000: crate::speed_t = 0o010017;
430+
}
431+
}
428432

429433
pub const VEOL: usize = 11;
430434
pub const VEOL2: usize = 16;

‎src/unix/linux_like/linux/gnu/b32/m68k/mod.rs‎

Lines changed: 37 additions & 33 deletions
Original file line numberDiff line numberDiff line change
@@ -390,39 +390,43 @@ pub const FFDLY: crate::tcflag_t = 0o100000;
390390
pub const VTDLY: crate::tcflag_t = 0o040000;
391391
pub const XTABS: crate::tcflag_t = 0o014000;
392392

393-
pub const B0: crate::speed_t = 0o000000;
394-
pub const B50: crate::speed_t = 0o000001;
395-
pub const B75: crate::speed_t = 0o000002;
396-
pub const B110: crate::speed_t = 0o000003;
397-
pub const B134: crate::speed_t = 0o000004;
398-
pub const B150: crate::speed_t = 0o000005;
399-
pub const B200: crate::speed_t = 0o000006;
400-
pub const B300: crate::speed_t = 0o000007;
401-
pub const B600: crate::speed_t = 0o000010;
402-
pub const B1200: crate::speed_t = 0o000011;
403-
pub const B1800: crate::speed_t = 0o000012;
404-
pub const B2400: crate::speed_t = 0o000013;
405-
pub const B4800: crate::speed_t = 0o000014;
406-
pub const B9600: crate::speed_t = 0o000015;
407-
pub const B19200: crate::speed_t = 0o000016;
408-
pub const B38400: crate::speed_t = 0o000017;
409-
pub const EXTA: crate::speed_t = B19200;
410-
pub const EXTB: crate::speed_t = B38400;
411-
pub const B57600: crate::speed_t = 0o010001;
412-
pub const B115200: crate::speed_t = 0o010002;
413-
pub const B230400: crate::speed_t = 0o010003;
414-
pub const B460800: crate::speed_t = 0o010004;
415-
pub const B500000: crate::speed_t = 0o010005;
416-
pub const B576000: crate::speed_t = 0o010006;
417-
pub const B921600: crate::speed_t = 0o010007;
418-
pub const B1000000: crate::speed_t = 0o010010;
419-
pub const B1152000: crate::speed_t = 0o010011;
420-
pub const B1500000: crate::speed_t = 0o010012;
421-
pub const B2000000: crate::speed_t = 0o010013;
422-
pub const B2500000: crate::speed_t = 0o010014;
423-
pub const B3000000: crate::speed_t = 0o010015;
424-
pub const B3500000: crate::speed_t = 0o010016;
425-
pub const B4000000: crate::speed_t = 0o010017;
393+
cfg_if! {
394+
if #[cfg(not(gnu_simple_baud_rates))] {
395+
pub const B0: crate::speed_t = 0o000000;
396+
pub const B50: crate::speed_t = 0o000001;
397+
pub const B75: crate::speed_t = 0o000002;
398+
pub const B110: crate::speed_t = 0o000003;
399+
pub const B134: crate::speed_t = 0o000004;
400+
pub const B150: crate::speed_t = 0o000005;
401+
pub const B200: crate::speed_t = 0o000006;
402+
pub const B300: crate::speed_t = 0o000007;
403+
pub const B600: crate::speed_t = 0o000010;
404+
pub const B1200: crate::speed_t = 0o000011;
405+
pub const B1800: crate::speed_t = 0o000012;
406+
pub const B2400: crate::speed_t = 0o000013;
407+
pub const B4800: crate::speed_t = 0o000014;
408+
pub const B9600: crate::speed_t = 0o000015;
409+
pub const B19200: crate::speed_t = 0o000016;
410+
pub const B38400: crate::speed_t = 0o000017;
411+
pub const EXTA: crate::speed_t = B19200;
412+
pub const EXTB: crate::speed_t = B38400;
413+
pub const B57600: crate::speed_t = 0o010001;
414+
pub const B115200: crate::speed_t = 0o010002;
415+
pub const B230400: crate::speed_t = 0o010003;
416+
pub const B460800: crate::speed_t = 0o010004;
417+
pub const B500000: crate::speed_t = 0o010005;
418+
pub const B576000: crate::speed_t = 0o010006;
419+
pub const B921600: crate::speed_t = 0o010007;
420+
pub const B1000000: crate::speed_t = 0o010010;
421+
pub const B1152000: crate::speed_t = 0o010011;
422+
pub const B1500000: crate::speed_t = 0o010012;
423+
pub const B2000000: crate::speed_t = 0o010013;
424+
pub const B2500000: crate::speed_t = 0o010014;
425+
pub const B3000000: crate::speed_t = 0o010015;
426+
pub const B3500000: crate::speed_t = 0o010016;
427+
pub const B4000000: crate::speed_t = 0o010017;
428+
}
429+
}
426430

427431
pub const VEOL: usize = 11;
428432
pub const VEOL2: usize = 16;

‎src/unix/linux_like/linux/gnu/b32/mips/mod.rs‎

Lines changed: 37 additions & 33 deletions
Original file line numberDiff line numberDiff line change
@@ -887,38 +887,42 @@ pub const FFDLY: crate::tcflag_t = 0o100000;
887887
pub const VTDLY: crate::tcflag_t = 0o040000;
888888
pub const XTABS: crate::tcflag_t = 0o014000;
889889

890-
pub const B0: crate::speed_t = 0o000000;
891-
pub const B50: crate::speed_t = 0o000001;
892-
pub const B75: crate::speed_t = 0o000002;
893-
pub const B110: crate::speed_t = 0o000003;
894-
pub const B134: crate::speed_t = 0o000004;
895-
pub const B150: crate::speed_t = 0o000005;
896-
pub const B200: crate::speed_t = 0o000006;
897-
pub const B300: crate::speed_t = 0o000007;
898-
pub const B600: crate::speed_t = 0o000010;
899-
pub const B1200: crate::speed_t = 0o000011;
900-
pub const B1800: crate::speed_t = 0o000012;
901-
pub const B2400: crate::speed_t = 0o000013;
902-
pub const B4800: crate::speed_t = 0o000014;
903-
pub const B9600: crate::speed_t = 0o000015;
904-
pub const B19200: crate::speed_t = 0o000016;
905-
pub const B38400: crate::speed_t = 0o000017;
906-
pub const EXTA: crate::speed_t = B19200;
907-
pub const EXTB: crate::speed_t = B38400;
908-
pub const B57600: crate::speed_t = 0o010001;
909-
pub const B115200: crate::speed_t = 0o010002;
910-
pub const B230400: crate::speed_t = 0o010003;
911-
pub const B460800: crate::speed_t = 0o010004;
912-
pub const B500000: crate::speed_t = 0o010005;
913-
pub const B576000: crate::speed_t = 0o010006;
914-
pub const B921600: crate::speed_t = 0o010007;
915-
pub const B1000000: crate::speed_t = 0o010010;
916-
pub const B1152000: crate::speed_t = 0o010011;
917-
pub const B1500000: crate::speed_t = 0o010012;
918-
pub const B2000000: crate::speed_t = 0o010013;
919-
pub const B2500000: crate::speed_t = 0o010014;
920-
pub const B3000000: crate::speed_t = 0o010015;
921-
pub const B3500000: crate::speed_t = 0o010016;
922-
pub const B4000000: crate::speed_t = 0o010017;
890+
cfg_if! {
891+
if #[cfg(not(gnu_simple_baud_rates))] {
892+
pub const B0: crate::speed_t = 0o000000;
893+
pub const B50: crate::speed_t = 0o000001;
894+
pub const B75: crate::speed_t = 0o000002;
895+
pub const B110: crate::speed_t = 0o000003;
896+
pub const B134: crate::speed_t = 0o000004;
897+
pub const B150: crate::speed_t = 0o000005;
898+
pub const B200: crate::speed_t = 0o000006;
899+
pub const B300: crate::speed_t = 0o000007;
900+
pub const B600: crate::speed_t = 0o000010;
901+
pub const B1200: crate::speed_t = 0o000011;
902+
pub const B1800: crate::speed_t = 0o000012;
903+
pub const B2400: crate::speed_t = 0o000013;
904+
pub const B4800: crate::speed_t = 0o000014;
905+
pub const B9600: crate::speed_t = 0o000015;
906+
pub const B19200: crate::speed_t = 0o000016;
907+
pub const B38400: crate::speed_t = 0o000017;
908+
pub const EXTA: crate::speed_t = B19200;
909+
pub const EXTB: crate::speed_t = B38400;
910+
pub const B57600: crate::speed_t = 0o010001;
911+
pub const B115200: crate::speed_t = 0o010002;
912+
pub const B230400: crate::speed_t = 0o010003;
913+
pub const B460800: crate::speed_t = 0o010004;
914+
pub const B500000: crate::speed_t = 0o010005;
915+
pub const B576000: crate::speed_t = 0o010006;
916+
pub const B921600: crate::speed_t = 0o010007;
917+
pub const B1000000: crate::speed_t = 0o010010;
918+
pub const B1152000: crate::speed_t = 0o010011;
919+
pub const B1500000: crate::speed_t = 0o010012;
920+
pub const B2000000: crate::speed_t = 0o010013;
921+
pub const B2500000: crate::speed_t = 0o010014;
922+
pub const B3000000: crate::speed_t = 0o010015;
923+
pub const B3500000: crate::speed_t = 0o010016;
924+
pub const B4000000: crate::speed_t = 0o010017;
925+
}
926+
}
923927

924928
pub const EHWPOISON: c_int = 168;

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