diff --git a/src/lib.rs b/src/lib.rs
index 7997e11ca08f406195a3fedced0422954be4c489..84d89adcf232c1e4f11dd24aae78a2ea348eb3d0 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -10,7 +10,7 @@
 
 //! Crate docs
 
-#![allow(bad_style, raw_pointer_derive)]
+#![allow(bad_style, raw_pointer_derive, improper_ctypes)]
 #![cfg_attr(dox, feature(no_core, lang_items))]
 #![cfg_attr(dox, no_core)]
 #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
@@ -77,6 +77,25 @@ pub type uint16_t = u16;
 pub type uint32_t = u32;
 pub type uint64_t = u64;
 
+pub type c_schar = i8;
+pub type c_uchar = u8;
+pub type c_short = i16;
+pub type c_ushort = u16;
+pub type c_int = i32;
+pub type c_uint = u32;
+pub type c_float = f32;
+pub type c_double = f64;
+pub type c_longlong = i64;
+pub type c_ulonglong = u64;
+pub type intmax_t = i64;
+pub type uintmax_t = u64;
+
+pub type size_t = usize;
+pub type ptrdiff_t = isize;
+pub type intptr_t = isize;
+pub type uintptr_t = usize;
+pub type ssize_t = isize;
+
 pub enum FILE {}
 pub enum fpos_t {}
 pub enum DIR {}
diff --git a/src/unix/bsd/apple/b32.rs b/src/unix/bsd/apple/b32.rs
index 293822e721f3311573503146dc38f8ca71c05ca0..9a46ed05598eab24debfb1740edc6727b44cbbba 100644
--- a/src/unix/bsd/apple/b32.rs
+++ b/src/unix/bsd/apple/b32.rs
@@ -2,10 +2,6 @@
 
 pub type c_long = i32;
 pub type c_ulong = u32;
-pub type size_t = u32;
-pub type ptrdiff_t = i32;
-pub type intptr_t = i32;
-pub type uintptr_t = u32;
 
 pub const __PTHREAD_MUTEX_SIZE__: usize = 40;
 pub const __PTHREAD_COND_SIZE__: usize = 24;
diff --git a/src/unix/bsd/apple/b64.rs b/src/unix/bsd/apple/b64.rs
index fb9f58ccd244e1338aec4487e523395a30b15008..344582e35474fdd9e7b9d0a4cc248f544cd89d9b 100644
--- a/src/unix/bsd/apple/b64.rs
+++ b/src/unix/bsd/apple/b64.rs
@@ -2,10 +2,6 @@
 
 pub type c_long = i64;
 pub type c_ulong = u64;
-pub type size_t = u64;
-pub type ptrdiff_t = i64;
-pub type intptr_t = i64;
-pub type uintptr_t = u64;
 
 pub const __PTHREAD_MUTEX_SIZE__: usize = 56;
 pub const __PTHREAD_COND_SIZE__: usize = 40;
diff --git a/src/unix/bsd/apple/mod.rs b/src/unix/bsd/apple/mod.rs
index a9697cedc63ff13bd37ee16704ebd08ea90b6fe2..74435c43ebd584f1a79ef5c018321c312669fcba 100644
--- a/src/unix/bsd/apple/mod.rs
+++ b/src/unix/bsd/apple/mod.rs
@@ -8,7 +8,6 @@ pub type suseconds_t = i32;
 pub type dev_t = i32;
 pub type ino_t = u64;
 pub type mode_t = u16;
-pub type ssize_t = c_long;
 pub type nlink_t = u16;
 pub type blksize_t = i32;
 pub type rlim_t = u64;
diff --git a/src/unix/bsd/freebsdlike/x86.rs b/src/unix/bsd/freebsdlike/x86.rs
index 3be08eee33cc856ae18345858d36a3d8356e4a83..8a5e5f9fb8d28fb9b624e02af35b244b95a4f7c0 100644
--- a/src/unix/bsd/freebsdlike/x86.rs
+++ b/src/unix/bsd/freebsdlike/x86.rs
@@ -1,12 +1,7 @@
 pub type c_long = i32;
 pub type c_ulong = u32;
-pub type size_t = u32;
-pub type ptrdiff_t = i32;
 pub type time_t = i32;
 pub type suseconds_t = i32;
-pub type intptr_t = i32;
-pub type uintptr_t = u32;
-pub type ssize_t = i32;
 
 s! {
     pub struct stat {
diff --git a/src/unix/bsd/freebsdlike/x86_64.rs b/src/unix/bsd/freebsdlike/x86_64.rs
index c45374423b56ad1d82917dc22d6262b0fe821073..a2da8452c4d341f0d43736c244226fd723b6f55d 100644
--- a/src/unix/bsd/freebsdlike/x86_64.rs
+++ b/src/unix/bsd/freebsdlike/x86_64.rs
@@ -1,12 +1,7 @@
 pub type c_long = i64;
 pub type c_ulong = u64;
-pub type size_t = u64;
-pub type ptrdiff_t = i64;
 pub type time_t = i64;
 pub type suseconds_t = i64;
-pub type intptr_t = i64;
-pub type uintptr_t = u64;
-pub type ssize_t = i64;
 
 s! {
     pub struct stat {
diff --git a/src/unix/bsd/openbsdlike/mod.rs b/src/unix/bsd/openbsdlike/mod.rs
index 239eff2c7edc1a4a10d3e5c33824c57e0795a145..ecd1579e0c211ad66de0aac4907916ec4e9c27d9 100644
--- a/src/unix/bsd/openbsdlike/mod.rs
+++ b/src/unix/bsd/openbsdlike/mod.rs
@@ -1,15 +1,10 @@
 pub type c_long = i64;
 pub type c_ulong = u64;
-pub type size_t = u64;
-pub type ptrdiff_t = i64;
 pub type clock_t = i64;
 pub type time_t = i64;
 pub type suseconds_t = i64;
-pub type intptr_t = i64;
-pub type uintptr_t = u64;
 pub type dev_t = i32;
 pub type mode_t = u32;
-pub type ssize_t = c_long;
 pub type nlink_t = uint32_t;
 pub type blksize_t = uint32_t;
 pub type ino_t = uint64_t;
diff --git a/src/unix/mod.rs b/src/unix/mod.rs
index c7c7d4acffa4601dfcf68d72f521780bcd7359f9..c78058674d1b6de29b7b1b844ede0cca19839f6d 100644
--- a/src/unix/mod.rs
+++ b/src/unix/mod.rs
@@ -3,24 +3,12 @@
 //! More functions and definitions can be found in the more specific modules
 //! according to the platform in question.
 
-pub type c_schar = i8;
-pub type c_uchar = u8;
-pub type c_short = i16;
-pub type c_ushort = u16;
-pub type c_int = i32;
-pub type c_uint = u32;
-pub type c_float = f32;
-pub type c_double = f64;
-pub type c_longlong = i64;
-pub type c_ulonglong = u64;
-pub type intmax_t = i64;
-pub type uintmax_t = u64;
 pub type pid_t = i32;
 pub type uid_t = u32;
 pub type gid_t = u32;
 pub type in_addr_t = u32;
 pub type in_port_t = u16;
-pub type sighandler_t = size_t;
+pub type sighandler_t = ::size_t;
 
 s! {
     pub struct utimbuf {
@@ -82,13 +70,13 @@ s! {
     pub struct ipv6_mreq {
         pub ipv6mr_multiaddr: in6_addr,
         #[cfg(target_os = "android")]
-        pub ipv6mr_interface: c_int,
+        pub ipv6mr_interface: ::c_int,
         #[cfg(not(target_os = "android"))]
-        pub ipv6mr_interface: c_uint,
+        pub ipv6mr_interface: ::c_uint,
     }
 }
 
-pub const WNOHANG: c_int = 1;
+pub const WNOHANG: ::c_int = 1;
 pub const SIG_DFL: sighandler_t = 0 as sighandler_t;
 pub const SIG_IGN: sighandler_t = 1 as sighandler_t;
 pub const SIG_ERR: sighandler_t = !0 as sighandler_t;
@@ -108,74 +96,74 @@ cfg_if! {
 }
 
 extern {
-    pub fn socket(domain: c_int, ty: c_int, protocol: c_int) -> c_int;
+    pub fn socket(domain: ::c_int, ty: ::c_int, protocol: ::c_int) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "connect$UNIX2003")]
-    pub fn connect(socket: c_int, address: *const sockaddr,
-                   len: socklen_t) -> c_int;
+    pub fn connect(socket: ::c_int, address: *const sockaddr,
+                   len: socklen_t) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "bind$UNIX2003")]
-    pub fn bind(socket: c_int, address: *const sockaddr,
-                address_len: socklen_t) -> c_int;
+    pub fn bind(socket: ::c_int, address: *const sockaddr,
+                address_len: socklen_t) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "listen$UNIX2003")]
-    pub fn listen(socket: c_int, backlog: c_int) -> c_int;
+    pub fn listen(socket: ::c_int, backlog: ::c_int) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "accept$UNIX2003")]
-    pub fn accept(socket: c_int, address: *mut sockaddr,
-                  address_len: *mut socklen_t) -> c_int;
+    pub fn accept(socket: ::c_int, address: *mut sockaddr,
+                  address_len: *mut socklen_t) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "getpeername$UNIX2003")]
-    pub fn getpeername(socket: c_int, address: *mut sockaddr,
-                       address_len: *mut socklen_t) -> c_int;
+    pub fn getpeername(socket: ::c_int, address: *mut sockaddr,
+                       address_len: *mut socklen_t) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "getsockname$UNIX2003")]
-    pub fn getsockname(socket: c_int, address: *mut sockaddr,
-                       address_len: *mut socklen_t) -> c_int;
-    pub fn setsockopt(socket: c_int, level: c_int, name: c_int,
+    pub fn getsockname(socket: ::c_int, address: *mut sockaddr,
+                       address_len: *mut socklen_t) -> ::c_int;
+    pub fn setsockopt(socket: ::c_int, level: ::c_int, name: ::c_int,
                       value: *const ::c_void,
-                      option_len: socklen_t) -> c_int;
+                      option_len: socklen_t) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "sendto$UNIX2003")]
-    pub fn sendto(socket: c_int, buf: *const ::c_void, len: size_t,
-                  flags: c_int, addr: *const sockaddr,
-                  addrlen: socklen_t) -> ssize_t;
-    pub fn shutdown(socket: c_int, how: c_int) -> c_int;
+    pub fn sendto(socket: ::c_int, buf: *const ::c_void, len: ::size_t,
+                  flags: ::c_int, addr: *const sockaddr,
+                  addrlen: socklen_t) -> ::ssize_t;
+    pub fn shutdown(socket: ::c_int, how: ::c_int) -> ::c_int;
 
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "chmod$UNIX2003")]
-    pub fn chmod(path: *const c_char, mode: mode_t) -> c_int;
+    pub fn chmod(path: *const c_char, mode: mode_t) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "fchmod$UNIX2003")]
-    pub fn fchmod(fd: c_int, mode: mode_t) -> c_int;
+    pub fn fchmod(fd: ::c_int, mode: mode_t) -> ::c_int;
 
     #[cfg_attr(target_os = "macos", link_name = "fstat$INODE64")]
-    pub fn fstat(fildes: c_int, buf: *mut stat) -> c_int;
+    pub fn fstat(fildes: ::c_int, buf: *mut stat) -> ::c_int;
 
-    pub fn mkdir(path: *const c_char, mode: mode_t) -> c_int;
+    pub fn mkdir(path: *const c_char, mode: mode_t) -> ::c_int;
 
     #[cfg_attr(target_os = "macos", link_name = "stat$INODE64")]
-    pub fn stat(path: *const c_char, buf: *mut stat) -> c_int;
+    pub fn stat(path: *const c_char, buf: *mut stat) -> ::c_int;
 
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "popen$UNIX2003")]
     pub fn popen(command: *const c_char,
                  mode: *const c_char) -> *mut ::FILE;
-    pub fn pclose(stream: *mut ::FILE) -> c_int;
+    pub fn pclose(stream: *mut ::FILE) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "fdopen$UNIX2003")]
-    pub fn fdopen(fd: c_int, mode: *const c_char) -> *mut ::FILE;
-    pub fn fileno(stream: *mut ::FILE) -> c_int;
+    pub fn fdopen(fd: ::c_int, mode: *const c_char) -> *mut ::FILE;
+    pub fn fileno(stream: *mut ::FILE) -> ::c_int;
 
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "open$UNIX2003")]
-    pub fn open(path: *const c_char, oflag: c_int, ...) -> c_int;
+    pub fn open(path: *const c_char, oflag: ::c_int, ...) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "creat$UNIX2003")]
-    pub fn creat(path: *const c_char, mode: mode_t) -> c_int;
+    pub fn creat(path: *const c_char, mode: mode_t) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "fcntl$UNIX2003")]
-    pub fn fcntl(fd: c_int, cmd: c_int, ...) -> c_int;
+    pub fn fcntl(fd: ::c_int, cmd: ::c_int, ...) -> ::c_int;
 
     #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
                link_name = "opendir$INODE64")]
@@ -184,161 +172,161 @@ extern {
     pub fn opendir(dirname: *const c_char) -> *mut ::DIR;
     #[cfg_attr(target_os = "macos", link_name = "readdir_r$INODE64")]
     pub fn readdir_r(dirp: *mut ::DIR, entry: *mut ::dirent,
-                      result: *mut *mut ::dirent) -> c_int;
+                      result: *mut *mut ::dirent) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "closedir$UNIX2003")]
-    pub fn closedir(dirp: *mut ::DIR) -> c_int;
+    pub fn closedir(dirp: *mut ::DIR) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
                link_name = "rewinddir$INODE64")]
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "rewinddir$INODE64$UNIX2003")]
     pub fn rewinddir(dirp: *mut ::DIR);
 
-    pub fn access(path: *const c_char, amode: c_int) -> c_int;
-    pub fn alarm(seconds: c_uint) -> c_uint;
-    pub fn chdir(dir: *const c_char) -> c_int;
+    pub fn access(path: *const c_char, amode: ::c_int) -> ::c_int;
+    pub fn alarm(seconds: ::c_uint) -> ::c_uint;
+    pub fn chdir(dir: *const c_char) -> ::c_int;
     pub fn chown(path: *const c_char, uid: uid_t,
-                 gid: gid_t) -> c_int;
+                 gid: gid_t) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "close$UNIX2003")]
-    pub fn close(fd: c_int) -> c_int;
-    pub fn dup(fd: c_int) -> c_int;
-    pub fn dup2(src: c_int, dst: c_int) -> c_int;
+    pub fn close(fd: ::c_int) -> ::c_int;
+    pub fn dup(fd: ::c_int) -> ::c_int;
+    pub fn dup2(src: ::c_int, dst: ::c_int) -> ::c_int;
     pub fn execv(prog: *const c_char,
-                 argv: *const *const c_char) -> c_int;
+                 argv: *const *const c_char) -> ::c_int;
     pub fn execve(prog: *const c_char, argv: *const *const c_char,
                   envp: *const *const c_char)
-                  -> c_int;
+                  -> ::c_int;
     pub fn execvp(c: *const c_char,
-                  argv: *const *const c_char) -> c_int;
+                  argv: *const *const c_char) -> ::c_int;
     pub fn fork() -> pid_t;
-    pub fn fpathconf(filedes: c_int, name: c_int) -> c_long;
-    pub fn getcwd(buf: *mut c_char, size: size_t) -> *mut c_char;
+    pub fn fpathconf(filedes: ::c_int, name: ::c_int) -> c_long;
+    pub fn getcwd(buf: *mut c_char, size: ::size_t) -> *mut c_char;
     pub fn getegid() -> gid_t;
     pub fn geteuid() -> uid_t;
     pub fn getgid() -> gid_t;
-    pub fn getgroups(ngroups_max: c_int, groups: *mut gid_t)
-                     -> c_int;
+    pub fn getgroups(ngroups_max: ::c_int, groups: *mut gid_t)
+                     -> ::c_int;
     pub fn getlogin() -> *mut c_char;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "getopt$UNIX2003")]
-    pub fn getopt(argc: c_int, argv: *const *mut c_char,
-                  optstr: *const c_char) -> c_int;
+    pub fn getopt(argc: ::c_int, argv: *const *mut c_char,
+                  optstr: *const c_char) -> ::c_int;
     pub fn getpgrp() -> pid_t;
     pub fn getpid() -> pid_t;
     pub fn getppid() -> pid_t;
     pub fn getuid() -> uid_t;
-    pub fn isatty(fd: c_int) -> c_int;
-    pub fn link(src: *const c_char, dst: *const c_char) -> c_int;
-    pub fn lseek(fd: c_int, offset: off_t, whence: c_int)
+    pub fn isatty(fd: ::c_int) -> ::c_int;
+    pub fn link(src: *const c_char, dst: *const c_char) -> ::c_int;
+    pub fn lseek(fd: ::c_int, offset: off_t, whence: ::c_int)
                  -> off_t;
-    pub fn pathconf(path: *const c_char, name: c_int) -> c_long;
+    pub fn pathconf(path: *const c_char, name: ::c_int) -> c_long;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "pause$UNIX2003")]
-    pub fn pause() -> c_int;
-    pub fn pipe(fds: *mut c_int) -> c_int;
+    pub fn pause() -> ::c_int;
+    pub fn pipe(fds: *mut ::c_int) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "read$UNIX2003")]
-    pub fn read(fd: c_int, buf: *mut ::c_void, count: size_t)
-                -> ssize_t;
-    pub fn rmdir(path: *const c_char) -> c_int;
-    pub fn setgid(gid: gid_t) -> c_int;
-    pub fn setpgid(pid: pid_t, pgid: pid_t) -> c_int;
+    pub fn read(fd: ::c_int, buf: *mut ::c_void, count: ::size_t)
+                -> ::ssize_t;
+    pub fn rmdir(path: *const c_char) -> ::c_int;
+    pub fn setgid(gid: gid_t) -> ::c_int;
+    pub fn setpgid(pid: pid_t, pgid: pid_t) -> ::c_int;
     pub fn setsid() -> pid_t;
-    pub fn setuid(uid: uid_t) -> c_int;
+    pub fn setuid(uid: uid_t) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "sleep$UNIX2003")]
-    pub fn sleep(secs: c_uint) -> c_uint;
+    pub fn sleep(secs: ::c_uint) -> ::c_uint;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "nanosleep$UNIX2003")]
     pub fn nanosleep(rqtp: *const timespec,
-                     rmtp: *mut timespec) -> c_int;
-    pub fn tcgetpgrp(fd: c_int) -> pid_t;
-    pub fn ttyname(fd: c_int) -> *mut c_char;
-    pub fn unlink(c: *const c_char) -> c_int;
+                     rmtp: *mut timespec) -> ::c_int;
+    pub fn tcgetpgrp(fd: ::c_int) -> pid_t;
+    pub fn ttyname(fd: ::c_int) -> *mut c_char;
+    pub fn unlink(c: *const c_char) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "wait$UNIX2003")]
-    pub fn wait(status: *mut c_int) -> pid_t;
+    pub fn wait(status: *mut ::c_int) -> pid_t;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "waitpid$UNIX2003")]
-    pub fn waitpid(pid: pid_t, status: *mut c_int, options: c_int)
+    pub fn waitpid(pid: pid_t, status: *mut ::c_int, options: ::c_int)
                    -> pid_t;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "write$UNIX2003")]
-    pub fn write(fd: c_int, buf: *const ::c_void, count: size_t)
-                 -> ssize_t;
+    pub fn write(fd: ::c_int, buf: *const ::c_void, count: ::size_t)
+                 -> ::ssize_t;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "pread$UNIX2003")]
-    pub fn pread(fd: c_int, buf: *mut ::c_void, count: size_t,
-                 offset: off_t) -> ssize_t;
+    pub fn pread(fd: ::c_int, buf: *mut ::c_void, count: ::size_t,
+                 offset: off_t) -> ::ssize_t;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "pwrite$UNIX2003")]
-    pub fn pwrite(fd: c_int, buf: *const ::c_void, count: size_t,
-                  offset: off_t) -> ssize_t;
-    pub fn utime(file: *const c_char, buf: *const utimbuf) -> c_int;
+    pub fn pwrite(fd: ::c_int, buf: *const ::c_void, count: ::size_t,
+                  offset: off_t) -> ::ssize_t;
+    pub fn utime(file: *const c_char, buf: *const utimbuf) -> ::c_int;
 
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                    link_name = "kill$UNIX2003")]
-    pub fn kill(pid: pid_t, sig: c_int) -> c_int;
+    pub fn kill(pid: pid_t, sig: ::c_int) -> ::c_int;
 
-    pub fn mlock(addr: *const ::c_void, len: size_t) -> c_int;
-    pub fn munlock(addr: *const ::c_void, len: size_t) -> c_int;
-    pub fn mlockall(flags: c_int) -> c_int;
-    pub fn munlockall() -> c_int;
+    pub fn mlock(addr: *const ::c_void, len: ::size_t) -> ::c_int;
+    pub fn munlock(addr: *const ::c_void, len: ::size_t) -> ::c_int;
+    pub fn mlockall(flags: ::c_int) -> ::c_int;
+    pub fn munlockall() -> ::c_int;
 
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "mmap$UNIX2003")]
     pub fn mmap(addr: *mut ::c_void,
-                len: size_t,
-                prot: c_int,
-                flags: c_int,
-                fd: c_int,
+                len: ::size_t,
+                prot: ::c_int,
+                flags: ::c_int,
+                fd: ::c_int,
                 offset: off_t)
                 -> *mut ::c_void;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "munmap$UNIX2003")]
-    pub fn munmap(addr: *mut ::c_void, len: size_t) -> c_int;
+    pub fn munmap(addr: *mut ::c_void, len: ::size_t) -> ::c_int;
 
-    pub fn if_nametoindex(ifname: *const c_char) -> c_uint;
+    pub fn if_nametoindex(ifname: *const c_char) -> ::c_uint;
 
     #[cfg_attr(target_os = "macos", link_name = "lstat$INODE64")]
-    pub fn lstat(path: *const c_char, buf: *mut stat) -> c_int;
+    pub fn lstat(path: *const c_char, buf: *mut stat) -> ::c_int;
 
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "fsync$UNIX2003")]
-    pub fn fsync(fd: c_int) -> c_int;
+    pub fn fsync(fd: ::c_int) -> ::c_int;
 
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "setenv$UNIX2003")]
     pub fn setenv(name: *const c_char, val: *const c_char,
-                  overwrite: c_int) -> c_int;
+                  overwrite: ::c_int) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "unsetenv$UNIX2003")]
-    pub fn unsetenv(name: *const c_char) -> c_int;
+    pub fn unsetenv(name: *const c_char) -> ::c_int;
 
     pub fn symlink(path1: *const c_char,
-                   path2: *const c_char) -> c_int;
+                   path2: *const c_char) -> ::c_int;
 
-    pub fn ftruncate(fd: c_int, length: off_t) -> c_int;
+    pub fn ftruncate(fd: ::c_int, length: off_t) -> ::c_int;
 
     #[cfg_attr(target_os = "android", link_name = "bsd_signal")]
-    pub fn signal(signum: c_int, handler: sighandler_t) -> sighandler_t;
+    pub fn signal(signum: ::c_int, handler: sighandler_t) -> sighandler_t;
 
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "getrlimit$UNIX2003")]
-    pub fn getrlimit(resource: c_int, rlim: *mut rlimit) -> c_int;
+    pub fn getrlimit(resource: ::c_int, rlim: *mut rlimit) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "setrlimit$UNIX2003")]
-    pub fn setrlimit(resource: c_int, rlim: *const rlimit) -> c_int;
-    pub fn getrusage(resource: c_int, usage: *mut rusage) -> c_int;
+    pub fn setrlimit(resource: ::c_int, rlim: *const rlimit) -> ::c_int;
+    pub fn getrusage(resource: ::c_int, usage: *mut rusage) -> ::c_int;
 
-    pub fn getdtablesize() -> c_int;
+    pub fn getdtablesize() -> ::c_int;
     #[cfg_attr(any(target_os = "macos", target_os = "ios"),
                link_name = "realpath$DARWIN_EXTSN")]
     pub fn realpath(pathname: *const ::c_char, resolved: *mut ::c_char)
                     -> *mut ::c_char;
 
-    pub fn flock(fd: c_int, operation: c_int) -> c_int;
+    pub fn flock(fd: ::c_int, operation: ::c_int) -> ::c_int;
 
     pub fn gettimeofday(tp: *mut ::timeval,
                         tz: *mut ::c_void) -> ::c_int;
@@ -362,11 +350,11 @@ extern {
     pub fn sched_yield() -> ::c_int;
     pub fn pthread_key_create(key: *mut pthread_key_t,
                               dtor: ::dox::Option<unsafe extern fn(*mut ::c_void)>)
-                              -> c_int;
-    pub fn pthread_key_delete(key: pthread_key_t) -> c_int;
+                              -> ::c_int;
+    pub fn pthread_key_delete(key: pthread_key_t) -> ::c_int;
     pub fn pthread_getspecific(key: pthread_key_t) -> *mut ::c_void;
     pub fn pthread_setspecific(key: pthread_key_t, value: *const ::c_void)
-                               -> c_int;
+                               -> ::c_int;
     pub fn pthread_mutex_init(lock: *mut pthread_mutex_t,
                               attr: *const pthread_mutexattr_t) -> ::c_int;
     pub fn pthread_mutex_destroy(lock: *mut pthread_mutex_t) -> ::c_int;
@@ -417,8 +405,8 @@ extern {
                            oldset: *mut sigset_t) -> ::c_int;
 
     // #[cfg_attr(target_os = "linux", link_name = "__xpg_strerror_r")]
-    pub fn strerror_r(errnum: c_int, buf: *mut c_char,
-                      buflen: size_t) -> c_int;
+    pub fn strerror_r(errnum: ::c_int, buf: *mut c_char,
+                      buflen: ::size_t) -> ::c_int;
 
     pub fn getsockopt(sockfd: ::c_int,
                       level: ::c_int,
@@ -448,20 +436,20 @@ extern {
 // TODO: get rid of this #[cfg(not(...))]
 #[cfg(not(target_os = "android"))]
 extern {
-    pub fn getifaddrs(ifap: *mut *mut ifaddrs) -> c_int;
+    pub fn getifaddrs(ifap: *mut *mut ifaddrs) -> ::c_int;
     pub fn freeifaddrs(ifa: *mut ifaddrs);
     #[cfg_attr(target_os = "macos", link_name = "glob$INODE64")]
     pub fn glob(pattern: *const c_char,
-                flags: c_int,
+                flags: ::c_int,
                 errfunc: ::dox::Option<extern "C" fn(epath: *const c_char,
-                                                     errno: c_int) -> c_int>,
-                pglob: *mut glob_t) -> c_int;
+                                                     errno: ::c_int) -> ::c_int>,
+                pglob: *mut glob_t) -> ::c_int;
     pub fn globfree(pglob: *mut glob_t);
 
-    pub fn posix_madvise(addr: *mut ::c_void, len: size_t, advice: c_int)
-                         -> c_int;
+    pub fn posix_madvise(addr: *mut ::c_void, len: ::size_t, advice: ::c_int)
+                         -> ::c_int;
 
-    pub fn shm_unlink(name: *const c_char) -> c_int;
+    pub fn shm_unlink(name: *const c_char) -> ::c_int;
 
     #[cfg_attr(all(target_os = "macos", target_arch = "x86_64"),
                link_name = "seekdir$INODE64")]
@@ -476,37 +464,37 @@ extern {
     pub fn telldir(dirp: *mut ::DIR) -> c_long;
 
     pub fn getsid(pid: pid_t) -> pid_t;
-    pub fn madvise(addr: *mut ::c_void, len: size_t, advice: c_int)
-                   -> c_int;
+    pub fn madvise(addr: *mut ::c_void, len: ::size_t, advice: ::c_int)
+                   -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "putenv$UNIX2003")]
-    pub fn putenv(string: *mut c_char) -> c_int;
+    pub fn putenv(string: *mut c_char) -> ::c_int;
     pub fn readlink(path: *const c_char,
                     buf: *mut c_char,
-                    bufsz: size_t)
-                    -> ssize_t;
+                    bufsz: ::size_t)
+                    -> ::ssize_t;
 
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "msync$UNIX2003")]
-    pub fn msync(addr: *mut ::c_void, len: size_t, flags: c_int) -> c_int;
-    pub fn sysconf(name: c_int) -> c_long;
+    pub fn msync(addr: *mut ::c_void, len: ::size_t, flags: ::c_int) -> ::c_int;
+    pub fn sysconf(name: ::c_int) -> c_long;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "usleep$UNIX2003")]
-    pub fn usleep(secs: c_uint) -> c_int;
+    pub fn usleep(secs: ::c_uint) -> ::c_int;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "recvfrom$UNIX2003")]
-    pub fn recvfrom(socket: c_int, buf: *mut ::c_void, len: size_t,
-                    flags: c_int, addr: *mut sockaddr,
-                    addrlen: *mut socklen_t) -> ssize_t;
+    pub fn recvfrom(socket: ::c_int, buf: *mut ::c_void, len: ::size_t,
+                    flags: ::c_int, addr: *mut sockaddr,
+                    addrlen: *mut socklen_t) -> ::ssize_t;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "send$UNIX2003")]
-    pub fn send(socket: c_int, buf: *const ::c_void, len: size_t,
-                flags: c_int) -> ssize_t;
+    pub fn send(socket: ::c_int, buf: *const ::c_void, len: ::size_t,
+                flags: ::c_int) -> ::ssize_t;
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                link_name = "recv$UNIX2003")]
-    pub fn recv(socket: c_int, buf: *mut ::c_void, len: size_t,
-                flags: c_int) -> ssize_t;
-    pub fn mkfifo(path: *const c_char, mode: mode_t) -> c_int;
+    pub fn recv(socket: ::c_int, buf: *mut ::c_void, len: ::size_t,
+                flags: ::c_int) -> ::ssize_t;
+    pub fn mkfifo(path: *const c_char, mode: mode_t) -> ::c_int;
 
     pub fn getpwuid_r(uid: ::uid_t,
                       pwd: *mut passwd,
diff --git a/src/unix/notbsd/android/mod.rs b/src/unix/notbsd/android/mod.rs
index fe296bdfc5ebc00063e72b972d907d409cd8ac60..3b3c9eb451c31d07150d9ec60fff05312be29417 100644
--- a/src/unix/notbsd/android/mod.rs
+++ b/src/unix/notbsd/android/mod.rs
@@ -3,17 +3,12 @@
 pub type c_char = u8;
 pub type c_long = i32;
 pub type c_ulong = u32;
-pub type size_t = u32;
-pub type ptrdiff_t = i32;
 pub type clock_t = i32;
 pub type time_t = i32;
 pub type suseconds_t = i32;
 pub type wchar_t = u32;
-pub type intptr_t = i32;
-pub type uintptr_t = u32;
 pub type off_t = i32;
 pub type ino_t = u32;
-pub type ssize_t = i32;
 pub type blkcnt_t = u32;
 pub type blksize_t = u32;
 pub type dev_t = u32;
diff --git a/src/unix/notbsd/linux/mips.rs b/src/unix/notbsd/linux/mips.rs
index 53cd2db13255a825e573a708582dbe311aeb03ac..2f2eabec114f698f753ea0a723a458e28d66aa10 100644
--- a/src/unix/notbsd/linux/mips.rs
+++ b/src/unix/notbsd/linux/mips.rs
@@ -1,17 +1,12 @@
 pub type c_char = i8;
 pub type c_long = i32;
 pub type c_ulong = u32;
-pub type size_t = u32;
-pub type ptrdiff_t = i32;
 pub type clock_t = i32;
 pub type time_t = i32;
 pub type suseconds_t = i32;
 pub type wchar_t = i32;
-pub type intptr_t = i32;
-pub type uintptr_t = u32;
 pub type off_t = i32;
 pub type ino_t = u32;
-pub type ssize_t = i32;
 pub type blkcnt_t = i32;
 pub type blksize_t = i32;
 pub type nlink_t = u32;
diff --git a/src/unix/notbsd/linux/mod.rs b/src/unix/notbsd/linux/mod.rs
index d45cb4eb85ad481724fbcc5d5126ebf9f3756c3b..6606b41c9c6e0f2489fe2e8e83e7df7b4b0a6def 100644
--- a/src/unix/notbsd/linux/mod.rs
+++ b/src/unix/notbsd/linux/mod.rs
@@ -8,9 +8,9 @@ pub type mode_t = u32;
 
 s! {
     pub struct glob_t {
-        pub gl_pathc: size_t,
+        pub gl_pathc: ::size_t,
         pub gl_pathv: *mut *mut c_char,
-        pub gl_offs:  size_t,
+        pub gl_offs: ::size_t,
         pub gl_flags: ::c_int,
 
         __unused1: *mut ::c_void,
@@ -223,9 +223,9 @@ extern {
 cfg_if! {
     if #[cfg(any(target_arch = "arm", target_arch = "x86",
                  target_arch = "x86_64"))] {
-        pub const PTHREAD_STACK_MIN: size_t = 16384;
+        pub const PTHREAD_STACK_MIN: ::size_t = 16384;
     } else {
-        pub const PTHREAD_STACK_MIN: size_t = 131072;
+        pub const PTHREAD_STACK_MIN: ::size_t = 131072;
     }
 }
 
@@ -255,9 +255,9 @@ cfg_if! {
             pub fn sysctl(name: *mut ::c_int,
                           namelen: ::c_int,
                           oldp: *mut ::c_void,
-                          oldlenp: *mut size_t,
+                          oldlenp: *mut ::size_t,
                           newp: *mut ::c_void,
-                          newlen: size_t)
+                          newlen: ::size_t)
                           -> ::c_int;
             pub fn ioctl(fd: ::c_int, request: ::c_ulong, ...) -> ::c_int;
             pub fn backtrace(buf: *mut *mut ::c_void,
diff --git a/src/unix/notbsd/linux/notmips/b32/mod.rs b/src/unix/notbsd/linux/notmips/b32/mod.rs
index b437d76d95ef0c8c75cfa8a07271dfeb49fddc4a..4e6024fa6d04f05e39fae8d3539a137932a31cfb 100644
--- a/src/unix/notbsd/linux/notmips/b32/mod.rs
+++ b/src/unix/notbsd/linux/notmips/b32/mod.rs
@@ -2,16 +2,11 @@
 
 pub type c_long = i32;
 pub type c_ulong = u32;
-pub type size_t = u32;
-pub type ptrdiff_t = i32;
 pub type clock_t = i32;
 pub type time_t = i32;
 pub type suseconds_t = i32;
-pub type intptr_t = i32;
-pub type uintptr_t = u32;
 pub type ino_t = u32;
 pub type off_t = i32;
-pub type ssize_t = i32;
 pub type blkcnt_t = i32;
 
 pub type blksize_t = i32;
diff --git a/src/unix/notbsd/linux/notmips/b64/mod.rs b/src/unix/notbsd/linux/notmips/b64/mod.rs
index 1916dc43aac95b3b4c484623b1b32482fe7ec81d..ce3f3381c070f46b4f8fb58ecafa5ab4a0b7e27b 100644
--- a/src/unix/notbsd/linux/notmips/b64/mod.rs
+++ b/src/unix/notbsd/linux/notmips/b64/mod.rs
@@ -2,16 +2,11 @@
 
 pub type c_long = i64;
 pub type c_ulong = u64;
-pub type size_t = u64;
-pub type ptrdiff_t = i64;
 pub type clock_t = i64;
 pub type time_t = i64;
 pub type suseconds_t = i64;
-pub type intptr_t = i64;
-pub type uintptr_t = u64;
 pub type ino_t = u64;
 pub type off_t = i64;
-pub type ssize_t = i64;
 pub type blkcnt_t = i64;
 
 s! {
diff --git a/src/windows.rs b/src/windows.rs
index e69d682d407a09b9e71a02e1dacebf9774933de1..a4783cb0810a7f36b13853df6567d7e570a0d222 100644
--- a/src/windows.rs
+++ b/src/windows.rs
@@ -1,39 +1,9 @@
 //! Windows CRT definitions
 
 pub type c_char = i8;
-pub type c_schar = i8;
-pub type c_uchar = u8;
-pub type c_short = i16;
-pub type c_ushort = u16;
-pub type c_int = i32;
-pub type c_uint = u32;
 pub type c_long = i32;
 pub type c_ulong = u32;
-pub type c_float = f32;
-pub type c_double = f64;
 pub type wchar_t = u16;
-pub type c_longlong = i64;
-pub type c_ulonglong = u64;
-pub type intmax_t = i64;
-pub type uintmax_t = u64;
-
-cfg_if! {
-    if #[cfg(target_arch = "x86")] {
-        pub type intptr_t = i32;
-        pub type ptrdiff_t = i32;
-        pub type size_t = u32;
-        pub type ssize_t = i32;
-        pub type uintptr_t = u32;
-    } else if #[cfg(target_arch = "x86_64")] {
-        pub type intptr_t = i64;
-        pub type ptrdiff_t = i64;
-        pub type size_t = u64;
-        pub type ssize_t = i64;
-        pub type uintptr_t = u64;
-    } else {
-        // unknown arch
-    }
-}
 
 pub type clock_t = i32;
 
@@ -57,9 +27,9 @@ s! {
         pub st_dev: dev_t,
         pub st_ino: ino_t,
         pub st_mode: u16,
-        pub st_nlink: c_short,
-        pub st_uid: c_short,
-        pub st_gid: c_short,
+        pub st_nlink: ::c_short,
+        pub st_uid: ::c_short,
+        pub st_gid: ::c_short,
         pub st_rdev: dev_t,
         pub st_size: i64,
         pub st_atime: time64_t,
@@ -84,47 +54,47 @@ s! {
     }
 }
 
-pub const EXIT_FAILURE: c_int = 1;
-pub const EXIT_SUCCESS: c_int = 0;
-pub const RAND_MAX: c_int = 32767;
-pub const EOF: c_int = -1;
-pub const SEEK_SET: c_int = 0;
-pub const SEEK_CUR: c_int = 1;
-pub const SEEK_END: c_int = 2;
-pub const _IOFBF: c_int = 0;
-pub const _IONBF: c_int = 4;
-pub const _IOLBF: c_int = 64;
-pub const BUFSIZ: c_uint = 512;
-pub const FOPEN_MAX: c_uint = 20;
-pub const FILENAME_MAX: c_uint = 260;
+pub const EXIT_FAILURE: ::c_int = 1;
+pub const EXIT_SUCCESS: ::c_int = 0;
+pub const RAND_MAX: ::c_int = 32767;
+pub const EOF: ::c_int = -1;
+pub const SEEK_SET: ::c_int = 0;
+pub const SEEK_CUR: ::c_int = 1;
+pub const SEEK_END: ::c_int = 2;
+pub const _IOFBF: ::c_int = 0;
+pub const _IONBF: ::c_int = 4;
+pub const _IOLBF: ::c_int = 64;
+pub const BUFSIZ: ::c_uint = 512;
+pub const FOPEN_MAX: ::c_uint = 20;
+pub const FILENAME_MAX: ::c_uint = 260;
 
 cfg_if! {
     if #[cfg(all(target_env = "gnu"))] {
-        pub const L_tmpnam: c_uint = 14;
-        pub const TMP_MAX: c_uint = 0x7fff;
+        pub const L_tmpnam: ::c_uint = 14;
+        pub const TMP_MAX: ::c_uint = 0x7fff;
     } else {
-        pub const L_tmpnam: c_uint = 260;
-        pub const TMP_MAX: c_uint = 0x7fff_ffff;
+        pub const L_tmpnam: ::c_uint = 260;
+        pub const TMP_MAX: ::c_uint = 0x7fff_ffff;
     }
 }
 
-pub const O_RDONLY: c_int = 0;
-pub const O_WRONLY: c_int = 1;
-pub const O_RDWR: c_int = 2;
-pub const O_APPEND: c_int = 8;
-pub const O_CREAT: c_int = 256;
-pub const O_EXCL: c_int = 1024;
-pub const O_TEXT: c_int = 16384;
-pub const O_BINARY: c_int = 32768;
-pub const O_NOINHERIT: c_int = 128;
-pub const O_TRUNC: c_int = 512;
-pub const S_IFCHR: c_int = 8192;
-pub const S_IFDIR: c_int = 16384;
-pub const S_IFREG: c_int = 32768;
-pub const S_IFMT: c_int = 61440;
-pub const S_IEXEC: c_int = 64;
-pub const S_IWRITE: c_int = 128;
-pub const S_IREAD: c_int = 256;
+pub const O_RDONLY: ::c_int = 0;
+pub const O_WRONLY: ::c_int = 1;
+pub const O_RDWR: ::c_int = 2;
+pub const O_APPEND: ::c_int = 8;
+pub const O_CREAT: ::c_int = 256;
+pub const O_EXCL: ::c_int = 1024;
+pub const O_TEXT: ::c_int = 16384;
+pub const O_BINARY: ::c_int = 32768;
+pub const O_NOINHERIT: ::c_int = 128;
+pub const O_TRUNC: ::c_int = 512;
+pub const S_IFCHR: ::c_int = 8192;
+pub const S_IFDIR: ::c_int = 16384;
+pub const S_IFREG: ::c_int = 32768;
+pub const S_IFMT: ::c_int = 61440;
+pub const S_IEXEC: ::c_int = 64;
+pub const S_IWRITE: ::c_int = 128;
+pub const S_IREAD: ::c_int = 256;
 
 #[cfg(target_env = "msvc")]
 #[link(name = "msvcrt")]
@@ -132,77 +102,77 @@ extern {}
 
 extern {
     #[link_name = "_chmod"]
-    pub fn chmod(path: *const c_char, mode: c_int) -> c_int;
+    pub fn chmod(path: *const c_char, mode: ::c_int) -> ::c_int;
     #[link_name = "_wchmod"]
-    pub fn wchmod(path: *const wchar_t, mode: c_int) -> c_int;
+    pub fn wchmod(path: *const wchar_t, mode: ::c_int) -> ::c_int;
     #[link_name = "_mkdir"]
-    pub fn mkdir(path: *const c_char) -> c_int;
+    pub fn mkdir(path: *const c_char) -> ::c_int;
     #[link_name = "_wrmdir"]
-    pub fn wrmdir(path: *const wchar_t) -> c_int;
+    pub fn wrmdir(path: *const wchar_t) -> ::c_int;
     #[link_name = "_fstat64"]
-    pub fn fstat(fildes: c_int, buf: *mut stat) -> c_int;
+    pub fn fstat(fildes: ::c_int, buf: *mut stat) -> ::c_int;
     #[link_name = "_stat64"]
-    pub fn stat(path: *const c_char, buf: *mut stat) -> c_int;
+    pub fn stat(path: *const c_char, buf: *mut stat) -> ::c_int;
     #[link_name = "_wstat64"]
-    pub fn wstat(path: *const wchar_t, buf: *mut stat) -> c_int;
+    pub fn wstat(path: *const wchar_t, buf: *mut stat) -> ::c_int;
     #[link_name = "_wutime64"]
-    pub fn wutime(file: *const wchar_t, buf: *mut utimbuf) -> c_int;
+    pub fn wutime(file: *const wchar_t, buf: *mut utimbuf) -> ::c_int;
     #[link_name = "_popen"]
     pub fn popen(command: *const c_char, mode: *const c_char) -> *mut ::FILE;
     #[link_name = "_pclose"]
-    pub fn pclose(stream: *mut ::FILE) -> c_int;
+    pub fn pclose(stream: *mut ::FILE) -> ::c_int;
     #[link_name = "_fdopen"]
-    pub fn fdopen(fd: c_int, mode: *const c_char) -> *mut ::FILE;
+    pub fn fdopen(fd: ::c_int, mode: *const c_char) -> *mut ::FILE;
     #[link_name = "_fileno"]
-    pub fn fileno(stream: *mut ::FILE) -> c_int;
+    pub fn fileno(stream: *mut ::FILE) -> ::c_int;
     #[link_name = "_open"]
-    pub fn open(path: *const c_char, oflag: c_int, ...) -> c_int;
+    pub fn open(path: *const c_char, oflag: ::c_int, ...) -> ::c_int;
     #[link_name = "_wopen"]
-    pub fn wopen(path: *const wchar_t, oflag: c_int, ...) -> c_int;
+    pub fn wopen(path: *const wchar_t, oflag: ::c_int, ...) -> ::c_int;
     #[link_name = "_creat"]
-    pub fn creat(path: *const c_char, mode: c_int) -> c_int;
+    pub fn creat(path: *const c_char, mode: ::c_int) -> ::c_int;
     #[link_name = "_access"]
-    pub fn access(path: *const c_char, amode: c_int) -> c_int;
+    pub fn access(path: *const c_char, amode: ::c_int) -> ::c_int;
     #[link_name = "_chdir"]
-    pub fn chdir(dir: *const c_char) -> c_int;
+    pub fn chdir(dir: *const c_char) -> ::c_int;
     #[link_name = "_close"]
-    pub fn close(fd: c_int) -> c_int;
+    pub fn close(fd: ::c_int) -> ::c_int;
     #[link_name = "_dup"]
-    pub fn dup(fd: c_int) -> c_int;
+    pub fn dup(fd: ::c_int) -> ::c_int;
     #[link_name = "_dup2"]
-    pub fn dup2(src: c_int, dst: c_int) -> c_int;
+    pub fn dup2(src: ::c_int, dst: ::c_int) -> ::c_int;
     #[link_name = "_execv"]
-    pub fn execv(prog: *const c_char, argv: *const *const c_char) -> intptr_t;
+    pub fn execv(prog: *const c_char, argv: *const *const c_char) -> ::intptr_t;
     #[link_name = "_execve"]
     pub fn execve(prog: *const c_char, argv: *const *const c_char,
-                  envp: *const *const c_char) -> c_int;
+                  envp: *const *const c_char) -> ::c_int;
     #[link_name = "_execvp"]
-    pub fn execvp(c: *const c_char, argv: *const *const c_char) -> c_int;
+    pub fn execvp(c: *const c_char, argv: *const *const c_char) -> ::c_int;
     #[link_name = "_execvpe"]
     pub fn execvpe(c: *const c_char, argv: *const *const c_char,
-                   envp: *const *const c_char) -> c_int;
+                   envp: *const *const c_char) -> ::c_int;
     #[link_name = "_getcwd"]
-    pub fn getcwd(buf: *mut c_char, size: c_int) -> *mut c_char;
+    pub fn getcwd(buf: *mut c_char, size: ::c_int) -> *mut c_char;
     #[link_name = "_getpid"]
-    pub fn getpid() -> c_int;
+    pub fn getpid() -> ::c_int;
     #[link_name = "_isatty"]
-    pub fn isatty(fd: c_int) -> c_int;
+    pub fn isatty(fd: ::c_int) -> ::c_int;
     #[link_name = "_lseek"]
-    pub fn lseek(fd: c_int, offset: c_long, origin: c_int) -> c_long;
+    pub fn lseek(fd: ::c_int, offset: c_long, origin: ::c_int) -> c_long;
     #[link_name = "_pipe"]
-    pub fn pipe(fds: *mut c_int, psize: c_uint, textmode: c_int) -> c_int;
+    pub fn pipe(fds: *mut ::c_int, psize: ::c_uint, textmode: ::c_int) -> ::c_int;
     #[link_name = "_read"]
-    pub fn read(fd: c_int, buf: *mut ::c_void, count: c_uint) -> c_int;
+    pub fn read(fd: ::c_int, buf: *mut ::c_void, count: ::c_uint) -> ::c_int;
     #[link_name = "_rmdir"]
-    pub fn rmdir(path: *const c_char) -> c_int;
+    pub fn rmdir(path: *const c_char) -> ::c_int;
     #[link_name = "_unlink"]
-    pub fn unlink(c: *const c_char) -> c_int;
+    pub fn unlink(c: *const c_char) -> ::c_int;
     #[link_name = "_write"]
-    pub fn write(fd: c_int, buf: *const ::c_void, count: c_uint) -> c_int;
+    pub fn write(fd: ::c_int, buf: *const ::c_void, count: ::c_uint) -> ::c_int;
     #[link_name = "_commit"]
-    pub fn commit(fd: c_int) -> c_int;
+    pub fn commit(fd: ::c_int) -> ::c_int;
     #[link_name = "_get_osfhandle"]
-    pub fn get_osfhandle(fd: c_int) -> intptr_t;
+    pub fn get_osfhandle(fd: ::c_int) -> ::intptr_t;
     #[link_name = "_open_osfhandle"]
-    pub fn open_osfhandle(osfhandle: intptr_t, flags: c_int) -> c_int;
+    pub fn open_osfhandle(osfhandle: ::intptr_t, flags: ::c_int) -> ::c_int;
 }