diff --git a/src/unix/haiku/mod.rs b/src/unix/haiku/mod.rs
index e7b0f34dd371a..0e60a1c6e267b 100644
--- a/src/unix/haiku/mod.rs
+++ b/src/unix/haiku/mod.rs
@@ -706,7 +706,7 @@ pub const F_RDLCK: ::c_int = 0x0040;
 pub const F_UNLCK: ::c_int = 0x0200;
 pub const F_WRLCK: ::c_int = 0x0400;
 
-pub const AT_FDCWD: ::c_int = -1;
+pub const AT_FDCWD: ::c_int = -100;
 pub const AT_SYMLINK_NOFOLLOW: ::c_int = 0x01;
 pub const AT_SYMLINK_FOLLOW: ::c_int = 0x02;
 pub const AT_REMOVEDIR: ::c_int = 0x04;
@@ -1192,6 +1192,80 @@ pub const _SC_REGEXP: ::c_int = 62;
 pub const _SC_SYMLOOP_MAX: ::c_int = 63;
 pub const _SC_SHELL: ::c_int = 64;
 pub const _SC_TTY_NAME_MAX: ::c_int = 65;
+pub const _SC_ADVISORY_INFO: ::c_int = 66;
+pub const _SC_BARRIERS: ::c_int = 67;
+pub const _SC_CLOCK_SELECTION: ::c_int = 68;
+pub const _SC_FSYNC: ::c_int = 69;
+pub const _SC_IPV6: ::c_int = 70;
+pub const _SC_MEMLOCK: ::c_int = 71;
+pub const _SC_MEMLOCK_RANGE: ::c_int = 72;
+pub const _SC_MESSAGE_PASSING: ::c_int = 73;
+pub const _SC_PRIORITIZED_IO: ::c_int = 74;
+pub const _SC_PRIORITY_SCHEDULING: ::c_int = 75;
+pub const _SC_READER_WRITER_LOCKS: ::c_int = 76;
+pub const _SC_SHARED_MEMORY_OBJECTS: ::c_int = 77;
+pub const _SC_SPAWN: ::c_int = 78;
+pub const _SC_SPIN_LOCKS: ::c_int = 79;
+pub const _SC_SPORADIC_SERVER: ::c_int = 80;
+pub const _SC_SYNCHRONIZED_IO: ::c_int = 81;
+pub const _SC_THREAD_PRIO_INHERIT: ::c_int = 82;
+pub const _SC_THREAD_PRIO_PROTECT: ::c_int = 83;
+pub const _SC_THREAD_ROBUST_PRIO_INHERIT: ::c_int = 84;
+pub const _SC_THREAD_ROBUST_PRIO_PROTECT: ::c_int = 85;
+pub const _SC_THREAD_SAFE_FUNCTIONS: ::c_int = 86;
+pub const _SC_THREAD_SPORADIC_SERVER: ::c_int = 87;
+pub const _SC_TIMEOUTS: ::c_int = 88;
+pub const _SC_TRACE: ::c_int = 89;
+pub const _SC_TRACE_EVENT_FILTER: ::c_int = 90;
+pub const _SC_TRACE_INHERIT: ::c_int = 91;
+pub const _SC_TRACE_LOG: ::c_int = 92;
+pub const _SC_TYPED_MEMORY_OBJECTS: ::c_int = 93;
+pub const _SC_V6_ILP32_OFF32: ::c_int = 94;
+pub const _SC_V6_ILP32_OFFBIG: ::c_int = 95;
+pub const _SC_V6_LP64_OFF64: ::c_int = 96;
+pub const _SC_V6_LPBIG_OFFBIG: ::c_int = 97;
+pub const _SC_V7_ILP32_OFF32: ::c_int = 98;
+pub const _SC_V7_ILP32_OFFBIG: ::c_int = 99;
+pub const _SC_V7_LP64_OFF64: ::c_int = 100;
+pub const _SC_V7_LPBIG_OFFBIG: ::c_int = 101;
+pub const _SC_2_C_BIND: ::c_int = 102;
+pub const _SC_2_C_DEV: ::c_int = 103;
+pub const _SC_2_CHAR_TERM: ::c_int = 104;
+pub const _SC_2_FORT_DEV: ::c_int = 105;
+pub const _SC_2_FORT_RUN: ::c_int = 106;
+pub const _SC_2_LOCALEDEF: ::c_int = 107;
+pub const _SC_2_PBS: ::c_int = 108;
+pub const _SC_2_PBS_ACCOUNTING: ::c_int = 109;
+pub const _SC_2_PBS_CHECKPOINT: ::c_int = 110;
+pub const _SC_2_PBS_LOCATE: ::c_int = 111;
+pub const _SC_2_PBS_MESSAGE: ::c_int = 112;
+pub const _SC_2_PBS_TRACK: ::c_int = 113;
+pub const _SC_2_SW_DEV: ::c_int = 114;
+pub const _SC_2_UPE: ::c_int = 115;
+pub const _SC_2_VERSION: ::c_int = 116;
+pub const _SC_XOPEN_CRYPT: ::c_int = 117;
+pub const _SC_XOPEN_ENH_I18N: ::c_int = 118;
+pub const _SC_XOPEN_REALTIME: ::c_int = 119;
+pub const _SC_XOPEN_REALTIME_THREADS: ::c_int = 120;
+pub const _SC_XOPEN_SHM: ::c_int = 121;
+pub const _SC_XOPEN_STREAMS: ::c_int = 122;
+pub const _SC_XOPEN_UNIX: ::c_int = 123;
+pub const _SC_XOPEN_UUCP: ::c_int = 124;
+pub const _SC_XOPEN_VERSION: ::c_int = 125;
+pub const _SC_BC_BASE_MAX: ::c_int = 129;
+pub const _SC_BC_DIM_MAX: ::c_int = 130;
+pub const _SC_BC_SCALE_MAX: ::c_int = 131;
+pub const _SC_BC_STRING_MAX: ::c_int = 132;
+pub const _SC_COLL_WEIGHTS_MAX: ::c_int = 133;
+pub const _SC_EXPR_NEST_MAX: ::c_int = 134;
+pub const _SC_LINE_MAX: ::c_int = 135;
+pub const _SC_LOGIN_NAME_MAX: ::c_int = 136;
+pub const _SC_MQ_OPEN_MAX: ::c_int = 137;
+pub const _SC_MQ_PRIO_MAX: ::c_int = 138;
+pub const _SC_THREAD_DESTRUCTOR_ITERATIONS: ::c_int = 139;
+pub const _SC_THREAD_KEYS_MAX: ::c_int = 140;
+pub const _SC_THREAD_THREADS_MAX: ::c_int = 141;
+pub const _SC_RE_DUP_MAX: ::c_int = 142;
 
 pub const PTHREAD_STACK_MIN: ::size_t = 8192;
 
@@ -1386,8 +1460,9 @@ pub const TCGB_RI: ::c_int = 0x04;
 pub const TCGB_DCD: ::c_int = 0x08;
 pub const TIOCM_CTS: ::c_int = TCGB_CTS;
 pub const TIOCM_CD: ::c_int = TCGB_DCD;
-pub const TIOCM_CAR: ::c_int = TIOCM_CD;
+pub const TIOCM_CAR: ::c_int = TCGB_DCD;
 pub const TIOCM_RI: ::c_int = TCGB_RI;
+pub const TIOCM_RNG: ::c_int = TCGB_RI;
 pub const TIOCM_DSR: ::c_int = TCGB_DSR;
 pub const TIOCM_DTR: ::c_int = 0x10;
 pub const TIOCM_RTS: ::c_int = 0x20;
@@ -1430,17 +1505,14 @@ pub const TCGETA: ::c_ulong = 0x8000;
 pub const TCSETA: ::c_ulong = TCGETA + 1;
 pub const TCSETAF: ::c_ulong = TCGETA + 2;
 pub const TCSETAW: ::c_ulong = TCGETA + 3;
-pub const TCWAITEVENT: ::c_ulong = TCGETA + 4;
 pub const TCSBRK: ::c_ulong = TCGETA + 5;
 pub const TCFLSH: ::c_ulong = TCGETA + 6;
 pub const TCXONC: ::c_ulong = TCGETA + 7;
-pub const TCQUERYCONNECTED: ::c_ulong = TCGETA + 8;
 pub const TCGETBITS: ::c_ulong = TCGETA + 9;
 pub const TCSETDTR: ::c_ulong = TCGETA + 10;
 pub const TCSETRTS: ::c_ulong = TCGETA + 11;
 pub const TIOCGWINSZ: ::c_ulong = TCGETA + 12;
 pub const TIOCSWINSZ: ::c_ulong = TCGETA + 13;
-pub const TCVTIME: ::c_ulong = TCGETA + 14;
 pub const TIOCGPGRP: ::c_ulong = TCGETA + 15;
 pub const TIOCSPGRP: ::c_ulong = TCGETA + 16;
 pub const TIOCSCTTY: ::c_ulong = TCGETA + 17;
@@ -1450,6 +1522,10 @@ pub const TIOCSBRK: ::c_ulong = TCGETA + 20;
 pub const TIOCCBRK: ::c_ulong = TCGETA + 21;
 pub const TIOCMBIS: ::c_ulong = TCGETA + 22;
 pub const TIOCMBIC: ::c_ulong = TCGETA + 23;
+pub const TIOCGSID: ::c_ulong = TCGETA + 24;
+pub const TIOCOUTQ: ::c_ulong = TCGETA + 25;
+pub const TIOCEXCL: ::c_ulong = TCGETA + 26;
+pub const TIOCNXCL: ::c_ulong = TCGETA + 27;
 
 pub const PRIO_PROCESS: ::c_int = 0;
 pub const PRIO_PGRP: ::c_int = 1;
diff --git a/src/unix/mod.rs b/src/unix/mod.rs
index 816bcae86ff3e..49984d3f00c65 100644
--- a/src/unix/mod.rs
+++ b/src/unix/mod.rs
@@ -1409,6 +1409,15 @@ cfg_if! {
                      target_os = "nto")))] {
         extern "C" {
             pub fn adjtime(delta: *const timeval, olddelta: *mut timeval) -> ::c_int;
+        }
+    }
+}
+
+cfg_if! {
+    if #[cfg(not(any(target_os = "emscripten",
+                     target_os = "android",
+                     target_os = "nto")))] {
+        extern "C" {
             pub fn stpncpy(dst: *mut c_char, src: *const c_char, n: size_t) -> *mut c_char;
         }
     }