Auto merge of #782 - tjkirch:master, r=alexcrichton

Add support for aarch64-unknown-linux-musl

This adds support for aarch64-unknown-linux-musl as requested in rust-lang/rust#44779 by @alexcrichton

The new file `ci/docker/aarch64-unknown-linux-musl/Dockerfile` essentially merges the aarch64-unknown-linux-gnu and x86_64-unknown-linux-musl Dockerfiles.

The bigger changes are under `src/unix/notbsd/linux/`, though they're fairly superficial:

Previously, some constants could be shared between all 64-bit musl triples, but aarch64 differs, so a number of things were moved from `musl/b64/mod.rs` to specific arches: `musl/b64/powerpc64.rs` and `musl/b64/x86_64.rs`, with the aarch64-specific differences being added to `musl/b64/aarch64.rs`.

Similarly, some constants moved from `musl/mod.rs` to lower levels: `musl/b32/mod.rs`, `musl/b64/powerpc64.rs`, and `musl/b64/x86_64.rs`, with the aarch64-specific differences added to `musl/b64/aarch64.rs`.

Finally, some things that were true of all Linux builds moved from `mod.rs` into lower levels: `mips/mod.rs`, `other/mod.rs`, `musl/b32/mod.rs`, `musl/b64/powerpc64.rs`, and `musl/b64/x86_64.rs`, with the aarch64-specific differences added to `musl/b64/aarch64.rs`.

Testing:

All linux-based triples under `ci/docker` were run through `ci/run-docker.sh` successfully, which checks that the size and alignment of definitions match for each triple, among other tests.  (The local build of rust from rust-lang/rust#44779 was set for the aarch64-unknown-linux-musl build.)

I also confirmed that it has "good style!" according to `ci/style.rs`.

12 files changed, 282 insertions, 70 deletions

diff --git a/README.md b/README.md
index 7b2d778ea1..c3333da147 100644
--- a/README.md
+++ b/README.md
@@ -138,6 +138,9 @@ Tested:
   * [`x86_64-unknown-linux-musl`](https://doc.rust-lang.org/libc/x86_64-unknown-linux-musl/libc/)
     (Linux MUSL)
   * [`aarch64-unknown-linux-gnu`](https://doc.rust-lang.org/libc/aarch64-unknown-linux-gnu/libc/)
+    (Linux)
+  * [`aarch64-unknown-linux-musl`](https://doc.rust-lang.org/libc/aarch64-unknown-linux-musl/libc/)
+    (Linux MUSL)
   * [`mips-unknown-linux-gnu`](https://doc.rust-lang.org/libc/mips-unknown-linux-gnu/libc/)
   * [`arm-unknown-linux-gnueabihf`](https://doc.rust-lang.org/libc/arm-unknown-linux-gnueabihf/libc/)
   * [`arm-linux-androideabi`](https://doc.rust-lang.org/libc/arm-linux-androideabi/libc/)
diff --git a/ci/README.md b/ci/README.md
index 13c7c8da52..aef6ef1db1 100644
--- a/ci/README.md
+++ b/ci/README.md
@@ -39,7 +39,7 @@ running tests. The triples tested are:
   * `{i686,x86_64}-pc-windows-{msvc,gnu}`
 * Travis
   * `{i686,x86_64,mips,aarch64}-unknown-linux-gnu`
-  * `x86_64-unknown-linux-musl`
+  * `{x86_64,aarch64}-unknown-linux-musl`
   * `arm-unknown-linux-gnueabihf`
   * `arm-linux-androideabi`
   * `{i686,x86_64}-apple-{darwin,ios}`
diff --git a/ci/docker/aarch64-unknown-linux-musl/Dockerfile b/ci/docker/aarch64-unknown-linux-musl/Dockerfile
new file mode 100644
index 0000000000..6aca3b8bee
--- /dev/null
+++ b/ci/docker/aarch64-unknown-linux-musl/Dockerfile
@@ -0,0 +1,24 @@
+FROM ubuntu:17.10
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+  gcc make libc6-dev git curl ca-certificates \
+  gcc-aarch64-linux-gnu qemu-user
+RUN curl https://www.musl-libc.org/releases/musl-1.1.16.tar.gz | \
+    tar xzf - && \
+    cd musl-1.1.16 && \
+    CC=aarch64-linux-gnu-gcc \
+    ./configure --prefix=/musl-aarch64 --enable-wrapper=yes && \
+    make install -j4 && \
+    cd .. && \
+    rm -rf musl-1.1.16 && \
+# Install linux kernel headers sanitized for use with musl
+    curl -L  https://github.com/sabotage-linux/kernel-headers/archive/v3.12.6-5.tar.gz | \
+    tar xzf - && \
+    cd kernel-headers-3.12.6-5 && \
+    make ARCH=arm64 prefix=/musl-aarch64 install -j4 && \
+    cd .. && \
+    rm -rf kernel-headers-3.12.6-5
+ENV PATH=$PATH:/musl-aarch64/bin:/rust/bin \
+    CC_aarch64_unknown_linux_musl=musl-gcc \
+    CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_LINKER=musl-gcc \
+    CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_RUNNER="qemu-aarch64 -L /musl-aarch64"
diff --git a/src/unix/notbsd/linux/mips/mod.rs b/src/unix/notbsd/linux/mips/mod.rs
index a58c7e0d6e..7681999cc1 100644
--- a/src/unix/notbsd/linux/mips/mod.rs
+++ b/src/unix/notbsd/linux/mips/mod.rs
@@ -646,6 +646,11 @@ pub const EHWPOISON: ::c_int = 168;
 pub const SIGEV_THREAD_ID: ::c_int = 4;
 pub const EPOLLWAKEUP: ::c_int = 0x20000000;
 
+#[doc(hidden)]
+pub const AF_MAX: ::c_int = 42;
+#[doc(hidden)]
+pub const PF_MAX: ::c_int = AF_MAX;
+
 #[link(name = "util")]
 extern {
     pub fn sysctl(name: *mut ::c_int,
diff --git a/src/unix/notbsd/linux/mod.rs b/src/unix/notbsd/linux/mod.rs
index 1e0856b0b1..c656e1dcb1 100644
--- a/src/unix/notbsd/linux/mod.rs
+++ b/src/unix/notbsd/linux/mod.rs
@@ -100,8 +100,12 @@ s! {
         __align: [::c_int; 0],
         #[cfg(not(any(target_arch = "x86_64", target_arch = "powerpc64",
                       target_arch = "mips64", target_arch = "s390x",
-                      target_arch = "sparc64")))]
+                      target_arch = "sparc64", target_arch = "aarch64")))]
         __align: [::c_long; 0],
+        #[cfg(all(target_arch = "aarch64", target_env = "gnu"))]
+        __align: [::c_long; 0],
+        #[cfg(all(target_arch = "aarch64", target_env = "musl"))]
+        __align: [::c_int; 0],
         size: [u8; __SIZEOF_PTHREAD_MUTEXATTR_T],
     }
 
@@ -737,14 +741,10 @@ pub const AF_IB: ::c_int = 27;
 pub const AF_MPLS: ::c_int = 28;
 pub const AF_NFC: ::c_int = 39;
 pub const AF_VSOCK: ::c_int = 40;
-#[doc(hidden)]
-pub const AF_MAX: ::c_int = 42;
 pub const PF_IB: ::c_int = AF_IB;
 pub const PF_MPLS: ::c_int = AF_MPLS;
 pub const PF_NFC: ::c_int = AF_NFC;
 pub const PF_VSOCK: ::c_int = AF_VSOCK;
-#[doc(hidden)]
-pub const PF_MAX: ::c_int = AF_MAX;
 
 // System V IPC
 pub const IPC_PRIVATE: ::key_t = 0;
diff --git a/src/unix/notbsd/linux/musl/b32/mod.rs b/src/unix/notbsd/linux/musl/b32/mod.rs
index 58c971b043..f8a62deab6 100644
--- a/src/unix/notbsd/linux/musl/b32/mod.rs
+++ b/src/unix/notbsd/linux/musl/b32/mod.rs
@@ -1,6 +1,7 @@
 pub type c_long = i32;
 pub type c_ulong = u32;
 pub type nlink_t = u32;
+pub type blksize_t = ::c_long;
 pub type __u64 = ::c_ulonglong;
 
 s! {
@@ -31,11 +32,31 @@ s! {
     pub struct sem_t {
         __val: [::c_int; 4],
     }
+
+    pub struct ipc_perm {
+        pub __ipc_perm_key: ::key_t,
+        pub uid: ::uid_t,
+        pub gid: ::gid_t,
+        pub cuid: ::uid_t,
+        pub cgid: ::gid_t,
+        pub mode: ::mode_t,
+        pub __seq: ::c_int,
+        __unused1: ::c_long,
+        __unused2: ::c_long
+    }
 }
 
+pub const SIGSTKSZ: ::size_t = 8192;
+pub const MINSIGSTKSZ: ::size_t = 2048;
+
 pub const __SIZEOF_PTHREAD_RWLOCK_T: usize = 32;
 pub const __SIZEOF_PTHREAD_MUTEX_T: usize = 24;
 
+#[doc(hidden)]
+pub const AF_MAX: ::c_int = 42;
+#[doc(hidden)]
+pub const PF_MAX: ::c_int = AF_MAX;
+
 cfg_if! {
     if #[cfg(any(target_arch = "x86"))] {
         mod x86;
diff --git a/src/unix/notbsd/linux/musl/b64/aarch64.rs b/src/unix/notbsd/linux/musl/b64/aarch64.rs
index fa103aacaa..fc5863d35c 100644
--- a/src/unix/notbsd/linux/musl/b64/aarch64.rs
+++ b/src/unix/notbsd/linux/musl/b64/aarch64.rs
@@ -1,7 +1,81 @@
 pub type c_char = u8;
 pub type __u64 = ::c_ulonglong;
+pub type wchar_t = u32;
+pub type nlink_t = u32;
+pub type blksize_t = ::c_int;
+
+s! {
+    pub struct stat {
+        pub st_dev: ::dev_t,
+        pub st_ino: ::ino_t,
+        pub st_mode: ::mode_t,
+        pub st_nlink: ::nlink_t,
+        pub st_uid: ::uid_t,
+        pub st_gid: ::gid_t,
+        pub st_rdev: ::dev_t,
+        __pad0: ::c_ulong,
+        pub st_size: ::off_t,
+        pub st_blksize: ::blksize_t,
+        __pad1: ::c_int,
+        pub st_blocks: ::blkcnt_t,
+        pub st_atime: ::time_t,
+        pub st_atime_nsec: ::c_long,
+        pub st_mtime: ::time_t,
+        pub st_mtime_nsec: ::c_long,
+        pub st_ctime: ::time_t,
+        pub st_ctime_nsec: ::c_long,
+        __unused: [::c_uint; 2],
+    }
+
+    pub struct stat64 {
+        pub st_dev: ::dev_t,
+        pub st_ino: ::ino_t,
+        pub st_mode: ::mode_t,
+        pub st_nlink: ::nlink_t,
+        pub st_uid: ::uid_t,
+        pub st_gid: ::gid_t,
+        pub st_rdev: ::dev_t,
+        __pad0: ::c_ulong,
+        pub st_size: ::off_t,
+        pub st_blksize: ::blksize_t,
+        __pad1: ::c_int,
+        pub st_blocks: ::blkcnt_t,
+        pub st_atime: ::time_t,
+        pub st_atime_nsec: ::c_long,
+        pub st_mtime: ::time_t,
+        pub st_mtime_nsec: ::c_long,
+        pub st_ctime: ::time_t,
+        pub st_ctime_nsec: ::c_long,
+        __unused: [::c_uint; 2],
+    }
+
+    pub struct ipc_perm {
+        pub __ipc_perm_key: ::key_t,
+        pub uid: ::uid_t,
+        pub gid: ::gid_t,
+        pub cuid: ::uid_t,
+        pub cgid: ::gid_t,
+        pub mode: ::mode_t,
+        pub __seq: ::c_ushort,
+        __unused1: ::c_ulong,
+        __unused2: ::c_ulong,
+    }
+}
 
 pub const SYS_pivot_root: ::c_long = 41;
 pub const SYS_gettid: ::c_long = 178;
 pub const SYS_perf_event_open: ::c_long = 241;
 pub const SYS_memfd_create: ::c_long = 279;
+
+pub const O_DIRECT: ::c_int = 0x10000;
+pub const O_DIRECTORY: ::c_int = 0x4000;
+pub const O_LARGEFILE: ::c_int = 0x20000;
+pub const O_NOFOLLOW: ::c_int = 0x8000;
+
+pub const MINSIGSTKSZ: ::size_t = 6144;
+pub const SIGSTKSZ: ::size_t = 12288;
+
+#[doc(hidden)]
+pub const PF_MAX: ::c_int = 43;
+#[doc(hidden)]
+pub const AF_MAX: ::c_int = PF_MAX;
diff --git a/src/unix/notbsd/linux/musl/b64/mod.rs b/src/unix/notbsd/linux/musl/b64/mod.rs
index cdce288b3b..9a1243a171 100644
--- a/src/unix/notbsd/linux/musl/b64/mod.rs
+++ b/src/unix/notbsd/linux/musl/b64/mod.rs
@@ -1,51 +1,7 @@
-pub type wchar_t = i32;
 pub type c_long = i64;
 pub type c_ulong = u64;
-pub type nlink_t = u64;
 
 s! {
-    pub struct stat {
-        pub st_dev: ::dev_t,
-        pub st_ino: ::ino_t,
-        pub st_nlink: ::nlink_t,
-        pub st_mode: ::mode_t,
-        pub st_uid: ::uid_t,
-        pub st_gid: ::gid_t,
-        __pad0: ::c_int,
-        pub st_rdev: ::dev_t,
-        pub st_size: ::off_t,
-        pub st_blksize: ::blksize_t,
-        pub st_blocks: ::blkcnt_t,
-        pub st_atime: ::time_t,
-        pub st_atime_nsec: ::c_long,
-        pub st_mtime: ::time_t,
-        pub st_mtime_nsec: ::c_long,
-        pub st_ctime: ::time_t,
-        pub st_ctime_nsec: ::c_long,
-        __unused: [::c_long; 3],
-    }
-
-    pub struct stat64 {
-        pub st_dev: ::dev_t,
-        pub st_ino: ::ino64_t,
-        pub st_nlink: ::nlink_t,
-        pub st_mode: ::mode_t,
-        pub st_uid: ::uid_t,
-        pub st_gid: ::gid_t,
-        __pad0: ::c_int,
-        pub st_rdev: ::dev_t,
-        pub st_size: ::off_t,
-        pub st_blksize: ::blksize_t,
-        pub st_blocks: ::blkcnt64_t,
-        pub st_atime: ::time_t,
-        pub st_atime_nsec: ::c_long,
-        pub st_mtime: ::time_t,
-        pub st_mtime_nsec: ::c_long,
-        pub st_ctime: ::time_t,
-        pub st_ctime_nsec: ::c_long,
-        __reserved: [::c_long; 3],
-    }
-
     pub struct statfs64 {
         pub f_type: ::c_ulong,
         pub f_bsize: ::c_ulong,
@@ -167,11 +123,7 @@ s! {
 pub const __SIZEOF_PTHREAD_RWLOCK_T: usize = 56;
 pub const __SIZEOF_PTHREAD_MUTEX_T: usize = 40;
 
-pub const O_DIRECT: ::c_int = 0x4000;
-pub const O_DIRECTORY: ::c_int = 0x10000;
-pub const O_NOFOLLOW: ::c_int = 0x20000;
 pub const O_ASYNC: ::c_int = 0x2000;
-pub const O_LARGEFILE: ::c_int = 0;
 
 pub const FIOCLEX: ::c_int = 0x5451;
 pub const FIONBIO: ::c_int = 0x5421;
@@ -202,7 +154,6 @@ pub const MAP_NORESERVE: ::c_int = 0x04000;
 pub const MAP_POPULATE: ::c_int = 0x08000;
 pub const MAP_NONBLOCK: ::c_int = 0x010000;
 pub const MAP_STACK: ::c_int = 0x020000;
-pub const MAP_32BIT: ::c_int = 0x0040;
 
 pub const SOCK_STREAM: ::c_int = 1;
 pub const SOCK_DGRAM: ::c_int = 2;
diff --git a/src/unix/notbsd/linux/musl/b64/powerpc64.rs b/src/unix/notbsd/linux/musl/b64/powerpc64.rs
index 4e8b9adbf7..5f31ab8962 100644
--- a/src/unix/notbsd/linux/musl/b64/powerpc64.rs
+++ b/src/unix/notbsd/linux/musl/b64/powerpc64.rs
@@ -1,7 +1,80 @@
 pub type c_char = u8;
+pub type wchar_t = i32;
 pub type __u64 = ::c_ulong;
+pub type nlink_t = u64;
+pub type blksize_t = ::c_long;
+
+s! {
+    pub struct stat {
+        pub st_dev: ::dev_t,
+        pub st_ino: ::ino_t,
+        pub st_nlink: ::nlink_t,
+        pub st_mode: ::mode_t,
+        pub st_uid: ::uid_t,
+        pub st_gid: ::gid_t,
+        __pad0: ::c_int,
+        pub st_rdev: ::dev_t,
+        pub st_size: ::off_t,
+        pub st_blksize: ::blksize_t,
+        pub st_blocks: ::blkcnt_t,
+        pub st_atime: ::time_t,
+        pub st_atime_nsec: ::c_long,
+        pub st_mtime: ::time_t,
+        pub st_mtime_nsec: ::c_long,
+        pub st_ctime: ::time_t,
+        pub st_ctime_nsec: ::c_long,
+        __unused: [::c_long; 3],
+    }
+
+    pub struct stat64 {
+        pub st_dev: ::dev_t,
+        pub st_ino: ::ino64_t,
+        pub st_nlink: ::nlink_t,
+        pub st_mode: ::mode_t,
+        pub st_uid: ::uid_t,
+        pub st_gid: ::gid_t,
+        __pad0: ::c_int,
+        pub st_rdev: ::dev_t,
+        pub st_size: ::off_t,
+        pub st_blksize: ::blksize_t,
+        pub st_blocks: ::blkcnt64_t,
+        pub st_atime: ::time_t,
+        pub st_atime_nsec: ::c_long,
+        pub st_mtime: ::time_t,
+        pub st_mtime_nsec: ::c_long,
+        pub st_ctime: ::time_t,
+        pub st_ctime_nsec: ::c_long,
+        __reserved: [::c_long; 3],
+    }
+
+    pub struct ipc_perm {
+        pub __ipc_perm_key: ::key_t,
+        pub uid: ::uid_t,
+        pub gid: ::gid_t,
+        pub cuid: ::uid_t,
+        pub cgid: ::gid_t,
+        pub mode: ::mode_t,
+        pub __seq: ::c_int,
+        __unused1: ::c_long,
+        __unused2: ::c_long
+    }
+}
 
 pub const SYS_pivot_root: ::c_long = 203;
 pub const SYS_gettid: ::c_long = 207;
 pub const SYS_perf_event_open: ::c_long = 319;
 pub const SYS_memfd_create: ::c_long = 360;
+
+pub const MAP_32BIT: ::c_int = 0x0040;
+pub const O_DIRECT: ::c_int = 0x4000;
+pub const O_DIRECTORY: ::c_int = 0x10000;
+pub const O_LARGEFILE: ::c_int = 0;
+pub const O_NOFOLLOW: ::c_int = 0x20000;
+
+pub const SIGSTKSZ: ::size_t = 8192;
+pub const MINSIGSTKSZ: ::size_t = 2048;
+
+#[doc(hidden)]
+pub const AF_MAX: ::c_int = 42;
+#[doc(hidden)]
+pub const PF_MAX: ::c_int = AF_MAX;
diff --git a/src/unix/notbsd/linux/musl/b64/x86_64.rs b/src/unix/notbsd/linux/musl/b64/x86_64.rs
index f81efdc6d1..78d38e49e8 100644
--- a/src/unix/notbsd/linux/musl/b64/x86_64.rs
+++ b/src/unix/notbsd/linux/musl/b64/x86_64.rs
@@ -1,7 +1,52 @@
 pub type c_char = i8;
+pub type wchar_t = i32;
+pub type nlink_t = u64;
+pub type blksize_t = ::c_long;
 pub type __u64 = ::c_ulonglong;
 
 s! {
+    pub struct stat {
+        pub st_dev: ::dev_t,
+        pub st_ino: ::ino_t,
+        pub st_nlink: ::nlink_t,
+        pub st_mode: ::mode_t,
+        pub st_uid: ::uid_t,
+        pub st_gid: ::gid_t,
+        __pad0: ::c_int,
+        pub st_rdev: ::dev_t,
+        pub st_size: ::off_t,
+        pub st_blksize: ::blksize_t,
+        pub st_blocks: ::blkcnt_t,
+        pub st_atime: ::time_t,
+        pub st_atime_nsec: ::c_long,
+        pub st_mtime: ::time_t,
+        pub st_mtime_nsec: ::c_long,
+        pub st_ctime: ::time_t,
+        pub st_ctime_nsec: ::c_long,
+        __unused: [::c_long; 3],
+    }
+
+    pub struct stat64 {
+        pub st_dev: ::dev_t,
+        pub st_ino: ::ino64_t,
+        pub st_nlink: ::nlink_t,
+        pub st_mode: ::mode_t,
+        pub st_uid: ::uid_t,
+        pub st_gid: ::gid_t,
+        __pad0: ::c_int,
+        pub st_rdev: ::dev_t,
+        pub st_size: ::off_t,
+        pub st_blksize: ::blksize_t,
+        pub st_blocks: ::blkcnt64_t,
+        pub st_atime: ::time_t,
+        pub st_atime_nsec: ::c_long,
+        pub st_mtime: ::time_t,
+        pub st_mtime_nsec: ::c_long,
+        pub st_ctime: ::time_t,
+        pub st_ctime_nsec: ::c_long,
+        __reserved: [::c_long; 3],
+    }
+
     pub struct mcontext_t {
         __private: [u64; 32],
     }
@@ -14,6 +59,18 @@ s! {
         pub uc_sigmask: ::sigset_t,
         __private: [u8; 512],
     }
+
+    pub struct ipc_perm {
+        pub __ipc_perm_key: ::key_t,
+        pub uid: ::uid_t,
+        pub gid: ::gid_t,
+        pub cuid: ::uid_t,
+        pub cgid: ::gid_t,
+        pub mode: ::mode_t,
+        pub __seq: ::c_int,
+        __unused1: ::c_long,
+        __unused2: ::c_long
+    }
 }
 
 // Syscall table
@@ -378,3 +435,17 @@ pub const DS: ::c_int = 23;
 pub const ES: ::c_int = 24;
 pub const FS: ::c_int = 25;
 pub const GS: ::c_int = 26;
+
+pub const MAP_32BIT: ::c_int = 0x0040;
+pub const O_DIRECT: ::c_int = 0x4000;
+pub const O_DIRECTORY: ::c_int = 0x10000;
+pub const O_LARGEFILE: ::c_int = 0;
+pub const O_NOFOLLOW: ::c_int = 0x20000;
+
+pub const SIGSTKSZ: ::size_t = 8192;
+pub const MINSIGSTKSZ: ::size_t = 2048;
+
+#[doc(hidden)]
+pub const AF_MAX: ::c_int = 42;
+#[doc(hidden)]
+pub const PF_MAX: ::c_int = AF_MAX;
diff --git a/src/unix/notbsd/linux/musl/mod.rs b/src/unix/notbsd/linux/musl/mod.rs
index 9b5a41d4ad..ab20d4c749 100644
--- a/src/unix/notbsd/linux/musl/mod.rs
+++ b/src/unix/notbsd/linux/musl/mod.rs
@@ -5,7 +5,6 @@ pub type ino_t = u64;
 pub type off_t = i64;
 pub type blkcnt_t = i64;
 
-pub type blksize_t = c_long;
 pub type fsblkcnt_t = ::c_ulonglong;
 pub type fsfilcnt_t = ::c_ulonglong;
 pub type rlim_t = ::c_ulonglong;
@@ -38,18 +37,6 @@ s! {
         pub sa_restorer: ::dox::Option<extern fn()>,
     }
 
-    pub struct ipc_perm {
-        pub __ipc_perm_key: ::key_t,
-        pub uid: ::uid_t,
-        pub gid: ::gid_t,
-        pub cuid: ::uid_t,
-        pub cgid: ::gid_t,
-        pub mode: ::mode_t,
-        pub __seq: ::c_int,
-        __unused1: ::c_long,
-        __unused2: ::c_long
-    }
-
     pub struct termios {
         pub c_iflag: ::tcflag_t,
         pub c_oflag: ::tcflag_t,
@@ -215,8 +202,6 @@ pub const CLOCK_TAI: ::clockid_t = 11;
 pub const MCL_CURRENT: ::c_int = 0x0001;
 pub const MCL_FUTURE: ::c_int = 0x0002;
 
-pub const SIGSTKSZ: ::size_t = 8192;
-pub const MINSIGSTKSZ: ::size_t = 2048;
 pub const CBAUD: ::tcflag_t = 0o0010017;
 pub const TAB1: ::c_int = 0x00000800;
 pub const TAB2: ::c_int = 0x00001000;
diff --git a/src/unix/notbsd/linux/other/mod.rs b/src/unix/notbsd/linux/other/mod.rs
index a645d91103..7a58c181b1 100644
--- a/src/unix/notbsd/linux/other/mod.rs
+++ b/src/unix/notbsd/linux/other/mod.rs
@@ -539,6 +539,11 @@ pub const TIOCM_DSR: ::c_int = 0x100;
 pub const TIOCM_CD: ::c_int = TIOCM_CAR;
 pub const TIOCM_RI: ::c_int = TIOCM_RNG;
 
+#[doc(hidden)]
+pub const AF_MAX: ::c_int = 42;
+#[doc(hidden)]
+pub const PF_MAX: ::c_int = AF_MAX;
+
 cfg_if! {
     if #[cfg(any(target_arch = "arm", target_arch = "x86",
                  target_arch = "x86_64"))] {