diff --git a/.cirrus.yml b/.cirrus.yml
index e3f777b5..4fb29f51 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -1,3 +1,17 @@
+task:
+  name: nightly x86_64-unknown-freebsd-10
+  freebsd_instance:
+    image: freebsd-10-4-release-amd64 
+  setup_script:
+    - pkg install -y curl
+    - curl https://sh.rustup.rs -sSf --output rustup.sh
+    - sh rustup.sh --default-toolchain nightly -y
+    - . $HOME/.cargo/env
+    - rustup default nightly
+  test_script:
+    - . $HOME/.cargo/env
+    - LIBC_CI=1 sh ci/run.sh x86_64-unknown-freebsd
+ 
 task:
   name: stable x86_64-unknown-freebsd-11
   freebsd_instance:
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 7c22c086..052777f4 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -21,7 +21,7 @@ Consequently, this indicates where an API should be added! Adding an API at a
 particular level in the hierarchy means that it is supported on all the child
 platforms of that level. For example, when adding a Unix API it should be added
 to `src/unix/mod.rs`, but when adding a Linux-only API it should be added to
-`src/unix/notbsd/linux/mod.rs`.
+`src/unix/linux_like/linux/mod.rs`.
 
 If you're not 100% sure at what level of the hierarchy an API should be added
 at, fear not! This crate has CI support which tests any binding against all
diff --git a/build.rs b/build.rs
index d9d23ca2..d5bcb525 100644
--- a/build.rs
+++ b/build.rs
@@ -16,11 +16,15 @@ fn main() {
         );
     }
 
-    // The ABI of libc is backward compatible with FreeBSD 11.
+    // The ABI of libc used by libstd is backward compatible with FreeBSD 10.
+    // The ABI of libc from crates.io is backward compatible with FreeBSD 11.
     //
     // On CI, we detect the actual FreeBSD version and match its ABI exactly,
     // running tests to ensure that the ABI is correct.
     match which_freebsd() {
+        Some(10) if libc_ci || rustc_dep_of_std => {
+            println!("cargo:rustc-cfg=freebsd10")
+        }
         Some(11) if libc_ci => println!("cargo:rustc-cfg=freebsd11"),
         Some(12) if libc_ci => println!("cargo:rustc-cfg=freebsd12"),
         Some(13) if libc_ci => println!("cargo:rustc-cfg=freebsd13"),
@@ -109,6 +113,7 @@ fn which_freebsd() -> Option<i32> {
     let stdout = stdout.unwrap();
 
     match &stdout {
+        s if s.starts_with("10") => Some(10),
         s if s.starts_with("11") => Some(11),
         s if s.starts_with("12") => Some(12),
         s if s.starts_with("13") => Some(13),
diff --git a/ci/azure.yml b/ci/azure.yml
index 456ac7f7..97f13c9d 100644
--- a/ci/azure.yml
+++ b/ci/azure.yml
@@ -25,7 +25,7 @@ jobs:
           TARGET: x86_64-unknown-linux-gnu
 
   - job: DockerLinuxTier2
-    dependsOn: DockerLinuxTier1
+    #dependsOn: DockerLinuxTier1
     pool:
       vmImage: ubuntu-16.04
     steps:
diff --git a/ci/build.sh b/ci/build.sh
index 3ce10deb..64ff06d7 100644
--- a/ci/build.sh
+++ b/ci/build.sh
@@ -2,6 +2,8 @@
 
 # Checks that libc builds properly for all supported targets on a particular
 # Rust version:
+# The FILTER environment variable can be used to select which target(s) to build.
+# For example: set FILTER to vxworks to select the targets that has vxworks in name
 
 set -ex
 
@@ -176,7 +178,9 @@ case "${OS}" in
 esac
 
 for TARGET in $TARGETS; do
-    test_target build "$TARGET"
+    if echo "$TARGET"|grep -q "$FILTER";then
+        test_target build "$TARGET"
+    fi
 done
 
 # FIXME: https://github.com/rust-lang/rust/issues/58564
@@ -237,7 +241,9 @@ powerpc64-wrs-vxworks \
 
 if [ "${RUST}" = "nightly" ] && [ "${OS}" = "linux" ]; then
     for TARGET in $RUST_LINUX_NO_CORE_TARGETS; do
-        test_target xbuild "$TARGET" 1
+        if echo "$TARGET"|grep -q "$FILTER";then
+            test_target xbuild "$TARGET" 1
+        fi
     done
 
     # Nintendo switch
diff --git a/libc-test/build.rs b/libc-test/build.rs
index 9eb83e85..d6982fc9 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -31,6 +31,23 @@ fn do_ctest() {
     }
 }
 
+fn ctest_cfg() -> ctest::TestGenerator {
+    let mut cfg = ctest::TestGenerator::new();
+    let libc_cfgs = [
+        "libc_priv_mod_use",
+        "libc_union",
+        "libc_const_size_of",
+        "libc_align",
+        "libc_core_cvoid",
+        "libc_packedN",
+        "libc_thread_local",
+    ];
+    for f in &libc_cfgs {
+        cfg.cfg(f, None);
+    }
+    cfg
+}
+
 fn main() {
     do_cc();
     do_ctest();
@@ -59,8 +76,9 @@ macro_rules! headers {
 fn test_apple(target: &str) {
     assert!(target.contains("apple"));
     let x86_64 = target.contains("x86_64");
+    let i686 = target.contains("i686");
 
-    let mut cfg = ctest::TestGenerator::new();
+    let mut cfg = ctest_cfg();
     cfg.flag("-Wno-deprecated-declarations");
     cfg.define("__APPLE_USE_RFC_3542", None);
 
@@ -225,13 +243,18 @@ fn test_apple(target: &str) {
         }
     });
 
+    cfg.skip_roundtrip(move |s| match s {
+        // FIXME: this type has the wrong ABI
+        "max_align_t" if i686 => true,
+        _ => false,
+    });
     cfg.generate("../src/lib.rs", "main.rs");
 }
 
 fn test_openbsd(target: &str) {
     assert!(target.contains("openbsd"));
 
-    let mut cfg = ctest::TestGenerator::new();
+    let mut cfg = ctest_cfg();
     cfg.flag("-Wno-deprecated-declarations");
 
     headers! { cfg:
@@ -371,7 +394,7 @@ fn test_windows(target: &str) {
     assert!(target.contains("windows"));
     let gnu = target.contains("gnu");
 
-    let mut cfg = ctest::TestGenerator::new();
+    let mut cfg = ctest_cfg();
     cfg.define("_WIN32_WINNT", Some("0x8000"));
 
     headers! { cfg:
@@ -474,7 +497,7 @@ fn test_windows(target: &str) {
 fn test_redox(target: &str) {
     assert!(target.contains("redox"));
 
-    let mut cfg = ctest::TestGenerator::new();
+    let mut cfg = ctest_cfg();
     cfg.flag("-Wno-deprecated-declarations");
 
     headers! {
@@ -540,7 +563,7 @@ fn test_redox(target: &str) {
 fn test_cloudabi(target: &str) {
     assert!(target.contains("cloudabi"));
 
-    let mut cfg = ctest::TestGenerator::new();
+    let mut cfg = ctest_cfg();
     cfg.flag("-Wno-deprecated-declarations");
 
     headers! {
@@ -611,7 +634,7 @@ fn test_cloudabi(target: &str) {
 fn test_solaris(target: &str) {
     assert!(target.contains("solaris"));
 
-    let mut cfg = ctest::TestGenerator::new();
+    let mut cfg = ctest_cfg();
     cfg.flag("-Wno-deprecated-declarations");
 
     cfg.define("_XOPEN_SOURCE", Some("700"));
@@ -722,7 +745,7 @@ fn test_solaris(target: &str) {
 fn test_netbsd(target: &str) {
     assert!(target.contains("netbsd"));
     let rumprun = target.contains("rumprun");
-    let mut cfg = ctest::TestGenerator::new();
+    let mut cfg = ctest_cfg();
 
     cfg.flag("-Wno-deprecated-declarations");
     cfg.define("_NETBSD_SOURCE", Some("1"));
@@ -922,7 +945,7 @@ fn test_netbsd(target: &str) {
 
 fn test_dragonflybsd(target: &str) {
     assert!(target.contains("dragonfly"));
-    let mut cfg = ctest::TestGenerator::new();
+    let mut cfg = ctest_cfg();
     cfg.flag("-Wno-deprecated-declarations");
 
     headers! {
@@ -1127,7 +1150,7 @@ fn test_dragonflybsd(target: &str) {
 fn test_wasi(target: &str) {
     assert!(target.contains("wasi"));
 
-    let mut cfg = ctest::TestGenerator::new();
+    let mut cfg = ctest_cfg();
     cfg.define("_GNU_SOURCE", None);
 
     headers! { cfg:
@@ -1204,7 +1227,7 @@ fn test_android(target: &str) {
     };
     let x86 = target.contains("i686") || target.contains("x86_64");
 
-    let mut cfg = ctest::TestGenerator::new();
+    let mut cfg = ctest_cfg();
     cfg.define("_GNU_SOURCE", None);
 
     headers! { cfg:
@@ -1429,11 +1452,12 @@ fn test_android(target: &str) {
 
 fn test_freebsd(target: &str) {
     assert!(target.contains("freebsd"));
-    let mut cfg = ctest::TestGenerator::new();
+    let mut cfg = ctest_cfg();
 
     let freebsd_ver = which_freebsd();
 
     match freebsd_ver {
+        Some(10) => cfg.cfg("freebsd10", None),
         Some(11) => cfg.cfg("freebsd11", None),
         Some(12) => cfg.cfg("freebsd12", None),
         Some(13) => cfg.cfg("freebsd13", None),
@@ -1443,7 +1467,10 @@ fn test_freebsd(target: &str) {
     // Required for `getline`:
     cfg.define("_WITH_GETLINE", None);
     // Required for making freebsd11_stat available in the headers
-    cfg.define("_WANT_FREEBSD11_STAT", None);
+    match freebsd_ver {
+        Some(10) => &mut cfg,
+        _ => cfg.define("_WANT_FREEBSD11_STAT", None),
+    };
 
     headers! { cfg:
                 "aio.h",
@@ -1571,6 +1598,34 @@ fn test_freebsd(target: &str) {
                 true
             }
 
+            // These constants were introduced in FreeBSD 11:
+            "SF_USER_READAHEAD"
+            | "SF_NOCACHE"
+            | "RLIMIT_KQUEUES"
+            | "RLIMIT_UMTXP"
+            | "EVFILT_PROCDESC"
+            | "EVFILT_SENDFILE"
+            | "EVFILT_EMPTY"
+            | "SO_REUSEPORT_LB"
+            | "TCP_CCALGOOPT"
+            | "TCP_PCAP_OUT"
+            | "TCP_PCAP_IN"
+            | "IP_BINDMULTI"
+            | "IP_ORIGDSTADDR"
+            | "IP_RECVORIGDSTADDR"
+            | "IPV6_ORIGDSTADDR"
+            | "IPV6_RECVORIGDSTADDR"
+            | "PD_CLOEXEC"
+            | "PD_ALLOWED_AT_FORK"
+            | "IP_RSS_LISTEN_BUCKET"
+                if Some(10) == freebsd_ver =>
+            {
+                true
+            }
+
+            // FIXME: This constant has a different value in FreeBSD 10:
+            "RLIM_NLIMITS" if Some(10) == freebsd_ver => true,
+
             // FIXME: There are deprecated - remove in a couple of releases.
             // These constants were removed in FreeBSD 11 (svn r273250) but will
             // still be accepted and ignored at runtime.
@@ -1586,12 +1641,35 @@ fn test_freebsd(target: &str) {
         }
     });
 
+    cfg.skip_struct(move |ty| {
+        match ty {
+            // `mmsghdr` is not available in FreeBSD 10
+            "mmsghdr" if Some(10) == freebsd_ver => true,
+
+            // `max_align_t` is not available in FreeBSD 10
+            "max_align_t" if Some(10) == freebsd_ver => true,
+
+            _ => false,
+        }
+    });
+
     cfg.skip_fn(move |name| {
         // skip those that are manually verified
         match name {
             // FIXME: https://github.com/rust-lang/libc/issues/1272
             "execv" | "execve" | "execvp" | "execvpe" | "fexecve" => true,
 
+            // These functions were added in FreeBSD 11:
+            "fdatasync" | "mq_getfd_np" | "sendmmsg" | "recvmmsg"
+                if Some(10) == freebsd_ver =>
+            {
+                true
+            }
+
+            // This function changed its return type from `int` in FreeBSD10 to
+            // `ssize_t` in FreeBSD11:
+            "aio_waitcomplete" if Some(10) == freebsd_ver => true,
+
             // The `uname` function in the `utsname.h` FreeBSD header is a C
             // inline function (has no symbol) that calls the `__xuname` symbol.
             // Therefore the function pointer comparison does not make sense for it.
@@ -1607,6 +1685,14 @@ fn test_freebsd(target: &str) {
         }
     });
 
+    cfg.skip_signededness(move |c| {
+        match c {
+            // FIXME: has a different sign in FreeBSD10
+            "blksize_t" if Some(10) == freebsd_ver => true,
+            _ => false,
+        }
+    });
+
     cfg.volatile_item(|i| {
         use ctest::VolatileItemKind::*;
         match i {
@@ -1620,9 +1706,17 @@ fn test_freebsd(target: &str) {
     });
 
     cfg.skip_field(move |struct_, field| {
-        // FIXME: `sa_sigaction` has type `sighandler_t` but that type is
-        // incorrect, see: https://github.com/rust-lang/libc/issues/1359
-        (struct_ == "sigaction" && field == "sa_sigaction")
+        match (struct_, field) {
+            // FIXME: `sa_sigaction` has type `sighandler_t` but that type is
+            // incorrect, see: https://github.com/rust-lang/libc/issues/1359
+            ("sigaction", "sa_sigaction") => true,
+
+            // FIXME: in FreeBSD10 this field has type `char*` instead of
+            // `void*`:
+            ("stack_t", "ss_sp") if Some(10) == freebsd_ver => true,
+
+            _ => false,
+        }
     });
 
     cfg.generate("../src/lib.rs", "main.rs");
@@ -1631,7 +1725,7 @@ fn test_freebsd(target: &str) {
 fn test_emscripten(target: &str) {
     assert!(target.contains("emscripten"));
 
-    let mut cfg = ctest::TestGenerator::new();
+    let mut cfg = ctest_cfg();
     cfg.define("_GNU_SOURCE", None); // FIXME: ??
 
     headers! { cfg:
@@ -1852,17 +1946,19 @@ fn test_linux(target: &str) {
     }
 
     let arm = target.contains("arm");
-    let x86_64 = target.contains("x86_64");
-    let x86_32 = target.contains("i686");
-    let x32 = target.contains("x32");
+    let i686 = target.contains("i686");
     let mips = target.contains("mips");
     let mips32 = mips && !target.contains("64");
-    let mips64 = mips && target.contains("64");
     let mips32_musl = mips32 && musl;
-    let sparc64 = target.contains("sparc64");
+    let mips64 = mips && target.contains("64");
+    let ppc64 = target.contains("powerpc64");
     let s390x = target.contains("s390x");
+    let sparc64 = target.contains("sparc64");
+    let x32 = target.contains("x32");
+    let x86_32 = target.contains("i686");
+    let x86_64 = target.contains("x86_64");
 
-    let mut cfg = ctest::TestGenerator::new();
+    let mut cfg = ctest_cfg();
     cfg.define("_GNU_SOURCE", None);
     // This macro re-deifnes fscanf,scanf,sscanf to link to the symbols that are
     // deprecated since glibc >= 2.29. This allows Rust binaries to link against
@@ -2286,6 +2382,9 @@ fn test_linux(target: &str) {
             true
         }
 
+        // FIXME: the call ABI of max_align_t is incorrect on these platforms:
+        "max_align_t" if i686 || mips64 || ppc64 => true,
+
         _ => false,
     });
 
@@ -2305,7 +2404,7 @@ fn test_linux_like_apis(target: &str) {
 
     if linux || android || emscripten {
         // test strerror_r from the `string.h` header
-        let mut cfg = ctest::TestGenerator::new();
+        let mut cfg = ctest_cfg();
         cfg.skip_type(|_| true).skip_static(|_| true);
 
         headers! { cfg: "string.h" }
@@ -2321,7 +2420,7 @@ fn test_linux_like_apis(target: &str) {
     if linux || android || emscripten {
         // test fcntl - see:
         // http://man7.org/linux/man-pages/man2/fcntl.2.html
-        let mut cfg = ctest::TestGenerator::new();
+        let mut cfg = ctest_cfg();
 
         if musl {
             cfg.header("fcntl.h");
@@ -2351,7 +2450,7 @@ fn test_linux_like_apis(target: &str) {
 
     if linux || android {
         // test termios
-        let mut cfg = ctest::TestGenerator::new();
+        let mut cfg = ctest_cfg();
         cfg.header("asm/termbits.h");
         cfg.skip_type(|_| true)
             .skip_static(|_| true)
@@ -2368,7 +2467,7 @@ fn test_linux_like_apis(target: &str) {
 
     if linux || android {
         // test IPV6_ constants:
-        let mut cfg = ctest::TestGenerator::new();
+        let mut cfg = ctest_cfg();
         headers! {
             cfg:
             "linux/in6.h"
@@ -2399,7 +2498,7 @@ fn test_linux_like_apis(target: &str) {
         // These types have a field called `p_type`, but including
         // "resolve.h" defines a `p_type` macro that expands to `__p_type`
         // making the tests for these fails when both are included.
-        let mut cfg = ctest::TestGenerator::new();
+        let mut cfg = ctest_cfg();
         cfg.header("elf.h");
         cfg.skip_fn(|_| true)
             .skip_static(|_| true)
@@ -2429,6 +2528,7 @@ fn which_freebsd() -> Option<i32> {
     let stdout = String::from_utf8(output.stdout).ok()?;
 
     match &stdout {
+        s if s.starts_with("10") => Some(10),
         s if s.starts_with("11") => Some(11),
         s if s.starts_with("12") => Some(12),
         s if s.starts_with("13") => Some(13),
diff --git a/src/fuchsia/mod.rs b/src/fuchsia/mod.rs
index 5d302aaf..7d23e671 100644
--- a/src/fuchsia/mod.rs
+++ b/src/fuchsia/mod.rs
@@ -3732,7 +3732,7 @@ extern "C" {
         native: ::pthread_t,
         value: *mut *mut ::c_void,
     ) -> ::c_int;
-    pub fn pthread_exit(value: *mut ::c_void);
+    pub fn pthread_exit(value: *mut ::c_void) -> !;
     pub fn pthread_attr_init(attr: *mut ::pthread_attr_t) -> ::c_int;
     pub fn pthread_attr_destroy(attr: *mut ::pthread_attr_t) -> ::c_int;
     pub fn pthread_attr_setstacksize(
diff --git a/src/unix/bsd/apple/b32/align.rs b/src/unix/bsd/apple/b32/align.rs
new file mode 100644
index 00000000..ba9bc3ab
--- /dev/null
+++ b/src/unix/bsd/apple/b32/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(16))]
+pub struct max_align_t([f64; 2]);
diff --git a/src/unix/bsd/apple/b32.rs b/src/unix/bsd/apple/b32/mod.rs
similarity index 96%
rename from src/unix/bsd/apple/b32.rs
rename to src/unix/bsd/apple/b32/mod.rs
index eacb0307..9248e3ad 100644
--- a/src/unix/bsd/apple/b32.rs
+++ b/src/unix/bsd/apple/b32/mod.rs
@@ -106,3 +106,10 @@ extern "C" {
         options: ::c_ulong,
     ) -> ::c_int;
 }
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/bsd/apple/b64/align.rs b/src/unix/bsd/apple/b64/align.rs
new file mode 100644
index 00000000..ba9bc3ab
--- /dev/null
+++ b/src/unix/bsd/apple/b64/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(16))]
+pub struct max_align_t([f64; 2]);
diff --git a/src/unix/bsd/apple/b64.rs b/src/unix/bsd/apple/b64/mod.rs
similarity index 97%
rename from src/unix/bsd/apple/b64.rs
rename to src/unix/bsd/apple/b64/mod.rs
index 9019babc..7f700838 100644
--- a/src/unix/bsd/apple/b64.rs
+++ b/src/unix/bsd/apple/b64/mod.rs
@@ -111,3 +111,10 @@ extern "C" {
         options: ::c_uint,
     ) -> ::c_int;
 }
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/bsd/freebsdlike/freebsd/mod.rs b/src/unix/bsd/freebsdlike/freebsd/mod.rs
index 9acc3fcc..980caf22 100644
--- a/src/unix/bsd/freebsdlike/freebsd/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/mod.rs
@@ -1456,7 +1456,7 @@ cfg_if! {
     } else if #[cfg(freebsd13)] {
         mod freebsd12;
         pub use self::freebsd12::*;
-    } else if #[cfg(freebsd11)] {
+    } else if #[cfg(any(freebsd10, freebsd11))] {
         mod freebsd11;
         pub use self::freebsd11::*;
     } else {
diff --git a/src/unix/bsd/freebsdlike/freebsd/x86_64/align.rs b/src/unix/bsd/freebsdlike/freebsd/x86_64/align.rs
new file mode 100644
index 00000000..7fffedbf
--- /dev/null
+++ b/src/unix/bsd/freebsdlike/freebsd/x86_64/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(16))]
+pub struct max_align_t([f64; 4]);
diff --git a/src/unix/bsd/freebsdlike/freebsd/x86_64.rs b/src/unix/bsd/freebsdlike/freebsd/x86_64/mod.rs
similarity index 82%
rename from src/unix/bsd/freebsdlike/freebsd/x86_64.rs
rename to src/unix/bsd/freebsdlike/freebsd/x86_64/mod.rs
index 5220cde9..0769a22f 100644
--- a/src/unix/bsd/freebsdlike/freebsd/x86_64.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/x86_64/mod.rs
@@ -15,3 +15,10 @@ cfg_if! {
     }
 }
 pub const MAP_32BIT: ::c_int = 0x00080000;
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/bsd/freebsdlike/mod.rs b/src/unix/bsd/freebsdlike/mod.rs
index c1128952..cfb8a4e1 100644
--- a/src/unix/bsd/freebsdlike/mod.rs
+++ b/src/unix/bsd/freebsdlike/mod.rs
@@ -1193,7 +1193,7 @@ extern "C" {
     pub fn getutxline(ut: *const utmpx) -> *mut utmpx;
     pub fn initgroups(name: *const ::c_char, basegid: ::gid_t) -> ::c_int;
     #[cfg_attr(
-        all(target_os = "freebsd", freebsd11),
+        all(target_os = "freebsd", any(freebsd11, freebsd10)),
         link_name = "kevent@FBSD_1.0"
     )]
     pub fn kevent(
@@ -1223,7 +1223,7 @@ extern "C" {
         mode: ::mode_t,
     ) -> ::c_int;
     #[cfg_attr(
-        all(target_os = "freebsd", freebsd11),
+        all(target_os = "freebsd", any(freebsd11, freebsd10)),
         link_name = "mknodat@FBSD_1.1"
     )]
     pub fn mknodat(
@@ -1241,13 +1241,13 @@ extern "C" {
         mqd: ::mqd_t,
         msg_ptr: *mut ::c_char,
         msg_len: ::size_t,
-        msq_prio: *mut ::c_uint,
+        msg_prio: *mut ::c_uint,
     ) -> ::ssize_t;
     pub fn mq_send(
         mqd: ::mqd_t,
         msg_ptr: *const ::c_char,
         msg_len: ::size_t,
-        msq_prio: ::c_uint,
+        msg_prio: ::c_uint,
     ) -> ::c_int;
     pub fn mq_setattr(
         mqd: ::mqd_t,
@@ -1258,14 +1258,14 @@ extern "C" {
         mqd: ::mqd_t,
         msg_ptr: *mut ::c_char,
         msg_len: ::size_t,
-        msq_prio: *mut ::c_uint,
+        msg_prio: *mut ::c_uint,
         abs_timeout: *const ::timespec,
     ) -> ::ssize_t;
     pub fn mq_timedsend(
         mqd: ::mqd_t,
         msg_ptr: *const ::c_char,
         msg_len: ::size_t,
-        msq_prio: ::c_uint,
+        msg_prio: ::c_uint,
         abs_timeout: *const ::timespec,
     ) -> ::c_int;
     pub fn mq_unlink(name: *const ::c_char) -> ::c_int;
diff --git a/src/unix/bsd/mod.rs b/src/unix/bsd/mod.rs
index 6cb40a0d..cf9f59e9 100644
--- a/src/unix/bsd/mod.rs
+++ b/src/unix/bsd/mod.rs
@@ -558,7 +558,7 @@ extern "C" {
     #[cfg_attr(target_os = "macos", link_name = "glob$INODE64")]
     #[cfg_attr(target_os = "netbsd", link_name = "__glob30")]
     #[cfg_attr(
-        all(target_os = "freebsd", freebsd11),
+        all(target_os = "freebsd", any(freebsd11, freebsd10)),
         link_name = "glob@FBSD_1.0"
     )]
     pub fn glob(
@@ -571,7 +571,7 @@ extern "C" {
     ) -> ::c_int;
     #[cfg_attr(target_os = "netbsd", link_name = "__globfree30")]
     #[cfg_attr(
-        all(target_os = "freebsd", freebsd11),
+        all(target_os = "freebsd", any(freebsd11, freebsd10)),
         link_name = "globfree@FBSD_1.0"
     )]
     pub fn globfree(pglob: *mut ::glob_t);
diff --git a/src/unix/bsd/netbsdlike/netbsd/mod.rs b/src/unix/bsd/netbsdlike/netbsd/mod.rs
index 5e3f0467..ba28bce1 100644
--- a/src/unix/bsd/netbsdlike/netbsd/mod.rs
+++ b/src/unix/bsd/netbsdlike/netbsd/mod.rs
@@ -1627,13 +1627,13 @@ extern "C" {
         mqd: ::mqd_t,
         msg_ptr: *mut ::c_char,
         msg_len: ::size_t,
-        msq_prio: *mut ::c_uint,
+        msg_prio: *mut ::c_uint,
     ) -> ::ssize_t;
     pub fn mq_send(
         mqd: ::mqd_t,
         msg_ptr: *const ::c_char,
         msg_len: ::size_t,
-        msq_prio: ::c_uint,
+        msg_prio: ::c_uint,
     ) -> ::c_int;
     pub fn mq_setattr(
         mqd: ::mqd_t,
@@ -1645,7 +1645,7 @@ extern "C" {
         mqd: ::mqd_t,
         msg_ptr: *mut ::c_char,
         msg_len: ::size_t,
-        msq_prio: *mut ::c_uint,
+        msg_prio: *mut ::c_uint,
         abs_timeout: *const ::timespec,
     ) -> ::ssize_t;
     #[link_name = "__mq_timedsend50"]
@@ -1653,7 +1653,7 @@ extern "C" {
         mqd: ::mqd_t,
         msg_ptr: *const ::c_char,
         msg_len: ::size_t,
-        msq_prio: ::c_uint,
+        msg_prio: ::c_uint,
         abs_timeout: *const ::timespec,
     ) -> ::c_int;
     pub fn mq_unlink(name: *const ::c_char) -> ::c_int;
diff --git a/src/unix/linux_like/android/b32/x86/align.rs b/src/unix/linux_like/android/b32/x86/align.rs
new file mode 100644
index 00000000..ca208549
--- /dev/null
+++ b/src/unix/linux_like/android/b32/x86/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(8))]
+pub struct max_align_t([f64; 2]);
diff --git a/src/unix/linux_like/android/b32/x86.rs b/src/unix/linux_like/android/b32/x86/mod.rs
similarity index 99%
rename from src/unix/linux_like/android/b32/x86.rs
rename to src/unix/linux_like/android/b32/x86/mod.rs
index a56fa004..101bf2d5 100644
--- a/src/unix/linux_like/android/b32/x86.rs
+++ b/src/unix/linux_like/android/b32/x86/mod.rs
@@ -413,3 +413,10 @@ pub const CS: ::c_int = 13;
 pub const EFL: ::c_int = 14;
 pub const UESP: ::c_int = 15;
 pub const SS: ::c_int = 16;
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/linux_like/android/b64/aarch64/align.rs b/src/unix/linux_like/android/b64/aarch64/align.rs
new file mode 100644
index 00000000..a71235ab
--- /dev/null
+++ b/src/unix/linux_like/android/b64/aarch64/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(16))]
+pub struct max_align_t([f32; 8]);
diff --git a/src/unix/linux_like/android/b64/aarch64.rs b/src/unix/linux_like/android/b64/aarch64/mod.rs
similarity index 99%
rename from src/unix/linux_like/android/b64/aarch64.rs
rename to src/unix/linux_like/android/b64/aarch64/mod.rs
index cb1c81b2..b2b91889 100644
--- a/src/unix/linux_like/android/b64/aarch64.rs
+++ b/src/unix/linux_like/android/b64/aarch64/mod.rs
@@ -323,3 +323,10 @@ pub const SYS_pkey_mprotect: ::c_long = 288;
 pub const SYS_pkey_alloc: ::c_long = 289;
 pub const SYS_pkey_free: ::c_long = 290;
 pub const SYS_syscalls: ::c_long = 292;
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/linux_like/android/b64/x86_64/align.rs b/src/unix/linux_like/android/b64/x86_64/align.rs
new file mode 100644
index 00000000..7fffedbf
--- /dev/null
+++ b/src/unix/linux_like/android/b64/x86_64/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(16))]
+pub struct max_align_t([f64; 4]);
diff --git a/src/unix/linux_like/android/b64/x86_64.rs b/src/unix/linux_like/android/b64/x86_64/mod.rs
similarity index 99%
rename from src/unix/linux_like/android/b64/x86_64.rs
rename to src/unix/linux_like/android/b64/x86_64/mod.rs
index 2ab6080a..f5b8b16e 100644
--- a/src/unix/linux_like/android/b64/x86_64.rs
+++ b/src/unix/linux_like/android/b64/x86_64/mod.rs
@@ -418,3 +418,10 @@ pub const DS: ::c_int = 23;
 pub const ES: ::c_int = 24;
 pub const FS: ::c_int = 25;
 pub const GS: ::c_int = 26;
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/linux_like/emscripten/align.rs b/src/unix/linux_like/emscripten/align.rs
index 8019b7c3..8fa2186f 100644
--- a/src/unix/linux_like/emscripten/align.rs
+++ b/src/unix/linux_like/emscripten/align.rs
@@ -1,5 +1,9 @@
 macro_rules! expand_align {
     () => {
+        #[derive(Copy, Clone, Debug, PartialEq)]
+        #[repr(C, align(8))]
+        pub struct max_align_t([f64; 2]);
+
         s! {
             #[repr(align(4))]
             pub struct pthread_mutex_t {
diff --git a/src/unix/linux_like/linux/gnu/b32/arm/align.rs b/src/unix/linux_like/linux/gnu/b32/arm/align.rs
new file mode 100644
index 00000000..cd887aca
--- /dev/null
+++ b/src/unix/linux_like/linux/gnu/b32/arm/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(8))]
+pub struct max_align_t([i64; 2]);
diff --git a/src/unix/linux_like/linux/gnu/b32/arm.rs b/src/unix/linux_like/linux/gnu/b32/arm/mod.rs
similarity index 99%
rename from src/unix/linux_like/linux/gnu/b32/arm.rs
rename to src/unix/linux_like/linux/gnu/b32/arm/mod.rs
index 73af4b81..f74b41e3 100644
--- a/src/unix/linux_like/linux/gnu/b32/arm.rs
+++ b/src/unix/linux_like/linux/gnu/b32/arm/mod.rs
@@ -859,3 +859,10 @@ pub const SYS_pkey_mprotect: ::c_long = 394;
 pub const SYS_pkey_alloc: ::c_long = 395;
 pub const SYS_pkey_free: ::c_long = 396;
 pub const SYS_statx: ::c_long = 397;
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/linux_like/linux/gnu/b32/mips/align.rs b/src/unix/linux_like/linux/gnu/b32/mips/align.rs
new file mode 100644
index 00000000..a6e238d7
--- /dev/null
+++ b/src/unix/linux_like/linux/gnu/b32/mips/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(8))]
+pub struct max_align_t([f32; 4]);
diff --git a/src/unix/linux_like/linux/gnu/b32/mips.rs b/src/unix/linux_like/linux/gnu/b32/mips/mod.rs
similarity index 99%
rename from src/unix/linux_like/linux/gnu/b32/mips.rs
rename to src/unix/linux_like/linux/gnu/b32/mips/mod.rs
index cfe8ef69..23b0160b 100644
--- a/src/unix/linux_like/linux/gnu/b32/mips.rs
+++ b/src/unix/linux_like/linux/gnu/b32/mips/mod.rs
@@ -891,3 +891,10 @@ pub const TIOCM_RNG: ::c_int = 0x200;
 pub const TIOCM_DSR: ::c_int = 0x400;
 
 pub const EHWPOISON: ::c_int = 168;
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/linux_like/linux/gnu/b32/x86/align.rs b/src/unix/linux_like/linux/gnu/b32/x86/align.rs
new file mode 100644
index 00000000..c9ab8b97
--- /dev/null
+++ b/src/unix/linux_like/linux/gnu/b32/x86/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(16))]
+pub struct max_align_t([f64; 6]);
diff --git a/src/unix/linux_like/linux/gnu/b32/x86.rs b/src/unix/linux_like/linux/gnu/b32/x86/mod.rs
similarity index 99%
rename from src/unix/linux_like/linux/gnu/b32/x86.rs
rename to src/unix/linux_like/linux/gnu/b32/x86/mod.rs
index 67b80b28..05e87606 100644
--- a/src/unix/linux_like/linux/gnu/b32/x86.rs
+++ b/src/unix/linux_like/linux/gnu/b32/x86/mod.rs
@@ -1147,3 +1147,10 @@ extern "C" {
         ucp: *const ucontext_t,
     ) -> ::c_int;
 }
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/linux_like/linux/gnu/b64/aarch64/align.rs b/src/unix/linux_like/linux/gnu/b64/aarch64/align.rs
new file mode 100644
index 00000000..a71235ab
--- /dev/null
+++ b/src/unix/linux_like/linux/gnu/b64/aarch64/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(16))]
+pub struct max_align_t([f32; 8]);
diff --git a/src/unix/linux_like/linux/gnu/b64/aarch64.rs b/src/unix/linux_like/linux/gnu/b64/aarch64/mod.rs
similarity index 99%
rename from src/unix/linux_like/linux/gnu/b64/aarch64.rs
rename to src/unix/linux_like/linux/gnu/b64/aarch64/mod.rs
index 4769e74e..b980a11b 100644
--- a/src/unix/linux_like/linux/gnu/b64/aarch64.rs
+++ b/src/unix/linux_like/linux/gnu/b64/aarch64/mod.rs
@@ -936,3 +936,10 @@ extern "C" {
         newlen: ::size_t,
     ) -> ::c_int;
 }
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/linux_like/linux/gnu/b64/mips64/align.rs b/src/unix/linux_like/linux/gnu/b64/mips64/align.rs
new file mode 100644
index 00000000..7fffedbf
--- /dev/null
+++ b/src/unix/linux_like/linux/gnu/b64/mips64/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(16))]
+pub struct max_align_t([f64; 4]);
diff --git a/src/unix/linux_like/linux/gnu/b64/mips64.rs b/src/unix/linux_like/linux/gnu/b64/mips64/mod.rs
similarity index 99%
rename from src/unix/linux_like/linux/gnu/b64/mips64.rs
rename to src/unix/linux_like/linux/gnu/b64/mips64/mod.rs
index a9b49f3c..5b3da3cb 100644
--- a/src/unix/linux_like/linux/gnu/b64/mips64.rs
+++ b/src/unix/linux_like/linux/gnu/b64/mips64/mod.rs
@@ -999,3 +999,10 @@ extern "C" {
         newlen: ::size_t,
     ) -> ::c_int;
 }
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/linux_like/linux/gnu/b64/powerpc64/align.rs b/src/unix/linux_like/linux/gnu/b64/powerpc64/align.rs
new file mode 100644
index 00000000..86a5f28f
--- /dev/null
+++ b/src/unix/linux_like/linux/gnu/b64/powerpc64/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(16))]
+pub struct max_align_t([i64; 4]);
diff --git a/src/unix/linux_like/linux/gnu/b64/powerpc64.rs b/src/unix/linux_like/linux/gnu/b64/powerpc64/mod.rs
similarity index 99%
rename from src/unix/linux_like/linux/gnu/b64/powerpc64.rs
rename to src/unix/linux_like/linux/gnu/b64/powerpc64/mod.rs
index 212062b3..bd908954 100644
--- a/src/unix/linux_like/linux/gnu/b64/powerpc64.rs
+++ b/src/unix/linux_like/linux/gnu/b64/powerpc64/mod.rs
@@ -1035,3 +1035,10 @@ extern "C" {
         newlen: ::size_t,
     ) -> ::c_int;
 }
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/linux_like/linux/gnu/b64/sparc64/align.rs b/src/unix/linux_like/linux/gnu/b64/sparc64/align.rs
new file mode 100644
index 00000000..86a5f28f
--- /dev/null
+++ b/src/unix/linux_like/linux/gnu/b64/sparc64/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(16))]
+pub struct max_align_t([i64; 4]);
diff --git a/src/unix/linux_like/linux/gnu/b64/sparc64.rs b/src/unix/linux_like/linux/gnu/b64/sparc64/mod.rs
similarity index 99%
rename from src/unix/linux_like/linux/gnu/b64/sparc64.rs
rename to src/unix/linux_like/linux/gnu/b64/sparc64/mod.rs
index 32489bc3..93b1fa53 100644
--- a/src/unix/linux_like/linux/gnu/b64/sparc64.rs
+++ b/src/unix/linux_like/linux/gnu/b64/sparc64/mod.rs
@@ -970,3 +970,10 @@ extern "C" {
         newlen: ::size_t,
     ) -> ::c_int;
 }
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/linux_like/linux/gnu/b64/x86_64/align.rs b/src/unix/linux_like/linux/gnu/b64/x86_64/align.rs
new file mode 100644
index 00000000..7fffedbf
--- /dev/null
+++ b/src/unix/linux_like/linux/gnu/b64/x86_64/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(16))]
+pub struct max_align_t([f64; 4]);
diff --git a/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs b/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs
index 2ff0969b..d1a22943 100644
--- a/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs
@@ -906,3 +906,10 @@ cfg_if! {
         pub use self::not_x32::*;
     }
 }
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/linux_like/linux/mod.rs b/src/unix/linux_like/linux/mod.rs
index 87730a56..8e8223cd 100644
--- a/src/unix/linux_like/linux/mod.rs
+++ b/src/unix/linux_like/linux/mod.rs
@@ -2535,26 +2535,26 @@ extern "C" {
         mqd: ::mqd_t,
         msg_ptr: *mut ::c_char,
         msg_len: ::size_t,
-        msq_prio: *mut ::c_uint,
+        msg_prio: *mut ::c_uint,
     ) -> ::ssize_t;
     pub fn mq_timedreceive(
         mqd: ::mqd_t,
         msg_ptr: *mut ::c_char,
         msg_len: ::size_t,
-        msq_prio: *mut ::c_uint,
+        msg_prio: *mut ::c_uint,
         abs_timeout: *const ::timespec,
     ) -> ::ssize_t;
     pub fn mq_send(
         mqd: ::mqd_t,
         msg_ptr: *const ::c_char,
         msg_len: ::size_t,
-        msq_prio: ::c_uint,
+        msg_prio: ::c_uint,
     ) -> ::c_int;
     pub fn mq_timedsend(
         mqd: ::mqd_t,
         msg_ptr: *const ::c_char,
         msg_len: ::size_t,
-        msq_prio: ::c_uint,
+        msg_prio: ::c_uint,
         abs_timeout: *const ::timespec,
     ) -> ::c_int;
     pub fn mq_getattr(mqd: ::mqd_t, attr: *mut ::mq_attr) -> ::c_int;
diff --git a/src/unix/linux_like/linux/musl/b32/arm/align.rs b/src/unix/linux_like/linux/musl/b32/arm/align.rs
new file mode 100644
index 00000000..6b5d1182
--- /dev/null
+++ b/src/unix/linux_like/linux/musl/b32/arm/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(8))]
+pub struct max_align_t(i64, i64);
diff --git a/src/unix/linux_like/linux/musl/b32/arm.rs b/src/unix/linux_like/linux/musl/b32/arm/mod.rs
similarity index 99%
rename from src/unix/linux_like/linux/musl/b32/arm.rs
rename to src/unix/linux_like/linux/musl/b32/arm/mod.rs
index 12e977a6..fd1e259f 100644
--- a/src/unix/linux_like/linux/musl/b32/arm.rs
+++ b/src/unix/linux_like/linux/musl/b32/arm/mod.rs
@@ -835,3 +835,10 @@ extern "C" {
         flags: ::c_uint,
     ) -> ::ssize_t;
 }
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/linux_like/linux/musl/b32/mips/align.rs b/src/unix/linux_like/linux/musl/b32/mips/align.rs
new file mode 100644
index 00000000..a6e238d7
--- /dev/null
+++ b/src/unix/linux_like/linux/musl/b32/mips/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(8))]
+pub struct max_align_t([f32; 4]);
diff --git a/src/unix/linux_like/linux/musl/b32/mips.rs b/src/unix/linux_like/linux/musl/b32/mips/mod.rs
similarity index 99%
rename from src/unix/linux_like/linux/musl/b32/mips.rs
rename to src/unix/linux_like/linux/musl/b32/mips/mod.rs
index f574223f..7fdd121a 100644
--- a/src/unix/linux_like/linux/musl/b32/mips.rs
+++ b/src/unix/linux_like/linux/musl/b32/mips/mod.rs
@@ -836,3 +836,10 @@ pub const SYS_mlock2: ::c_long = 4000 + 359;
 pub const SYS_copy_file_range: ::c_long = 4000 + 360;
 pub const SYS_preadv2: ::c_long = 4000 + 361;
 pub const SYS_pwritev2: ::c_long = 4000 + 362;
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/linux_like/linux/musl/b32/x86/align.rs b/src/unix/linux_like/linux/musl/b32/x86/align.rs
new file mode 100644
index 00000000..b203d7e8
--- /dev/null
+++ b/src/unix/linux_like/linux/musl/b32/x86/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(8))]
+pub struct max_align_t([f64; 3]);
diff --git a/src/unix/linux_like/linux/musl/b32/x86.rs b/src/unix/linux_like/linux/musl/b32/x86/mod.rs
similarity index 99%
rename from src/unix/linux_like/linux/musl/b32/x86.rs
rename to src/unix/linux_like/linux/musl/b32/x86/mod.rs
index de73b3eb..fb556920 100644
--- a/src/unix/linux_like/linux/musl/b32/x86.rs
+++ b/src/unix/linux_like/linux/musl/b32/x86/mod.rs
@@ -943,3 +943,10 @@ extern "C" {
         flags: ::c_uint,
     ) -> ::ssize_t;
 }
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/linux_like/linux/musl/b64/aarch64/align.rs b/src/unix/linux_like/linux/musl/b64/aarch64/align.rs
new file mode 100644
index 00000000..a71235ab
--- /dev/null
+++ b/src/unix/linux_like/linux/musl/b64/aarch64/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(16))]
+pub struct max_align_t([f32; 8]);
diff --git a/src/unix/linux_like/linux/musl/b64/aarch64.rs b/src/unix/linux_like/linux/musl/b64/aarch64/mod.rs
similarity index 99%
rename from src/unix/linux_like/linux/musl/b64/aarch64.rs
rename to src/unix/linux_like/linux/musl/b64/aarch64/mod.rs
index caf49ff4..8c286d83 100644
--- a/src/unix/linux_like/linux/musl/b64/aarch64.rs
+++ b/src/unix/linux_like/linux/musl/b64/aarch64/mod.rs
@@ -645,3 +645,10 @@ pub const TIOCM_RI: ::c_int = TIOCM_RNG;
 extern "C" {
     pub fn ioctl(fd: ::c_int, request: ::c_int, ...) -> ::c_int;
 }
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/linux_like/linux/musl/b64/x86_64/align.rs b/src/unix/linux_like/linux/musl/b64/x86_64/align.rs
new file mode 100644
index 00000000..7fffedbf
--- /dev/null
+++ b/src/unix/linux_like/linux/musl/b64/x86_64/align.rs
@@ -0,0 +1,3 @@
+#[derive(Copy, Clone, Debug, PartialEq)]
+#[repr(C, align(16))]
+pub struct max_align_t([f64; 4]);
diff --git a/src/unix/linux_like/linux/musl/b64/x86_64.rs b/src/unix/linux_like/linux/musl/b64/x86_64/mod.rs
similarity index 99%
rename from src/unix/linux_like/linux/musl/b64/x86_64.rs
rename to src/unix/linux_like/linux/musl/b64/x86_64/mod.rs
index 9e5a8bf1..e4741a3a 100644
--- a/src/unix/linux_like/linux/musl/b64/x86_64.rs
+++ b/src/unix/linux_like/linux/musl/b64/x86_64/mod.rs
@@ -917,3 +917,10 @@ pub const TIOCM_RI: ::c_int = TIOCM_RNG;
 extern "C" {
     pub fn ioctl(fd: ::c_int, request: ::c_int, ...) -> ::c_int;
 }
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}
diff --git a/src/unix/mod.rs b/src/unix/mod.rs
index 8d78cea7..238da24b 100644
--- a/src/unix/mod.rs
+++ b/src/unix/mod.rs
@@ -669,7 +669,7 @@ extern "C" {
     #[cfg_attr(target_os = "macos", link_name = "fstat$INODE64")]
     #[cfg_attr(target_os = "netbsd", link_name = "__fstat50")]
     #[cfg_attr(
-        all(target_os = "freebsd", freebsd11),
+        all(target_os = "freebsd", any(freebsd11, freebsd10)),
         link_name = "fstat@FBSD_1.0"
     )]
     pub fn fstat(fildes: ::c_int, buf: *mut stat) -> ::c_int;
@@ -679,7 +679,7 @@ extern "C" {
     #[cfg_attr(target_os = "macos", link_name = "stat$INODE64")]
     #[cfg_attr(target_os = "netbsd", link_name = "__stat50")]
     #[cfg_attr(
-        all(target_os = "freebsd", freebsd11),
+        all(target_os = "freebsd", any(freebsd11, freebsd10)),
         link_name = "stat@FBSD_1.0"
     )]
     pub fn stat(path: *const c_char, buf: *mut stat) -> ::c_int;
@@ -722,7 +722,7 @@ extern "C" {
     #[cfg_attr(target_os = "macos", link_name = "readdir$INODE64")]
     #[cfg_attr(target_os = "netbsd", link_name = "__readdir30")]
     #[cfg_attr(
-        all(target_os = "freebsd", freebsd11),
+        all(target_os = "freebsd", any(freebsd11, freebsd10)),
         link_name = "readdir@FBSD_1.0"
     )]
     pub fn readdir(dirp: *mut ::DIR) -> *mut ::dirent;
@@ -757,7 +757,7 @@ extern "C" {
     ) -> ::c_int;
     #[cfg_attr(target_os = "macos", link_name = "fstatat$INODE64")]
     #[cfg_attr(
-        all(target_os = "freebsd", freebsd11),
+        all(target_os = "freebsd", any(freebsd11, freebsd10)),
         link_name = "fstatat@FBSD_1.1"
     )]
     pub fn fstatat(
@@ -989,7 +989,7 @@ extern "C" {
     #[cfg_attr(target_os = "macos", link_name = "lstat$INODE64")]
     #[cfg_attr(target_os = "netbsd", link_name = "__lstat50")]
     #[cfg_attr(
-        all(target_os = "freebsd", freebsd11),
+        all(target_os = "freebsd", any(freebsd11, freebsd10)),
         link_name = "lstat@FBSD_1.0"
     )]
     pub fn lstat(path: *const c_char, buf: *mut stat) -> ::c_int;
@@ -1048,7 +1048,7 @@ extern "C" {
         native: ::pthread_t,
         value: *mut *mut ::c_void,
     ) -> ::c_int;
-    pub fn pthread_exit(value: *mut ::c_void);
+    pub fn pthread_exit(value: *mut ::c_void) -> !;
     pub fn pthread_attr_init(attr: *mut ::pthread_attr_t) -> ::c_int;
     pub fn pthread_attr_destroy(attr: *mut ::pthread_attr_t) -> ::c_int;
     pub fn pthread_attr_setstacksize(
@@ -1242,7 +1242,7 @@ extern "C" {
 
     #[cfg_attr(target_os = "netbsd", link_name = "__mknod50")]
     #[cfg_attr(
-        all(target_os = "freebsd", freebsd11),
+        all(target_os = "freebsd", any(freebsd11, freebsd10)),
         link_name = "mknod@FBSD_1.0"
     )]
     pub fn mknod(
@@ -1458,7 +1458,7 @@ cfg_if! {
             #[cfg_attr(target_os = "macos", link_name = "readdir_r$INODE64")]
             #[cfg_attr(target_os = "netbsd", link_name = "__readdir_r30")]
             #[cfg_attr(
-                all(target_os = "freebsd", freebsd11),
+                all(target_os = "freebsd", any(freebsd11, freebsd10)),
                 link_name = "readdir_r@FBSD_1.0"
             )]
             /// The 64-bit libc on Solaris and illumos only has readdir_r.  If a
diff --git a/src/unix/solarish/mod.rs b/src/unix/solarish/mod.rs
index 353f1c6a..eaa43fe9 100644
--- a/src/unix/solarish/mod.rs
+++ b/src/unix/solarish/mod.rs
@@ -2094,26 +2094,26 @@ extern "C" {
         mqd: ::mqd_t,
         msg_ptr: *mut ::c_char,
         msg_len: ::size_t,
-        msq_prio: *mut ::c_uint,
+        msg_prio: *mut ::c_uint,
     ) -> ::ssize_t;
     pub fn mq_timedreceive(
         mqd: ::mqd_t,
         msg_ptr: *mut ::c_char,
         msg_len: ::size_t,
-        msq_prio: *mut ::c_uint,
+        msg_prio: *mut ::c_uint,
         abs_timeout: *const ::timespec,
     ) -> ::ssize_t;
     pub fn mq_send(
         mqd: ::mqd_t,
         msg_ptr: *const ::c_char,
         msg_len: ::size_t,
-        msq_prio: ::c_uint,
+        msg_prio: ::c_uint,
     ) -> ::c_int;
     pub fn mq_timedsend(
         mqd: ::mqd_t,
         msg_ptr: *const ::c_char,
         msg_len: ::size_t,
-        msq_prio: ::c_uint,
+        msg_prio: ::c_uint,
         abs_timeout: *const ::timespec,
     ) -> ::c_int;
     pub fn mq_getattr(mqd: ::mqd_t, attr: *mut ::mq_attr) -> ::c_int;
diff --git a/src/unix/uclibc/mod.rs b/src/unix/uclibc/mod.rs
index bf4d9772..986b05ca 100644
--- a/src/unix/uclibc/mod.rs
+++ b/src/unix/uclibc/mod.rs
@@ -2024,13 +2024,13 @@ extern "C" {
         mqd: ::mqd_t,
         msg_ptr: *mut ::c_char,
         msg_len: ::size_t,
-        msq_prio: *mut ::c_uint,
+        msg_prio: *mut ::c_uint,
     ) -> ::ssize_t;
     pub fn mq_send(
         mqd: ::mqd_t,
         msg_ptr: *const ::c_char,
         msg_len: ::size_t,
-        msq_prio: ::c_uint,
+        msg_prio: ::c_uint,
     ) -> ::c_int;
     pub fn mq_getattr(mqd: ::mqd_t, attr: *mut ::mq_attr) -> ::c_int;
     pub fn mq_setattr(
diff --git a/src/vxworks/mod.rs b/src/vxworks/mod.rs
index f1aff9d4..8745cd16 100755
--- a/src/vxworks/mod.rs
+++ b/src/vxworks/mod.rs
@@ -1361,7 +1361,7 @@ extern "C" {
     pub fn flock(fd: ::c_int, operation: ::c_int) -> ::c_int;
 
     pub fn gettimeofday(tp: *mut ::timeval, tz: *mut ::c_void) -> ::c_int;
-    pub fn pthread_exit(value: *mut ::c_void);
+    pub fn pthread_exit(value: *mut ::c_void) -> !;
     pub fn pthread_attr_setdetachstate(
         attr: *mut ::pthread_attr_t,
         state: ::c_int,
diff --git a/src/windows/gnu/align.rs b/src/windows/gnu/align.rs
new file mode 100644
index 00000000..dd3a3f72
--- /dev/null
+++ b/src/windows/gnu/align.rs
@@ -0,0 +1,9 @@
+cfg_if! {
+    if #[cfg(target_pointer_width = "64")] {
+        #[derive(Copy, Clone, Debug, PartialEq)]
+        #[repr(C, align(16))] pub struct max_align_t([f64; 4]);
+    } else if #[cfg(target_pointer_width = "32")] {
+        #[derive(Copy, Clone, Debug, PartialEq)]
+        #[repr(C, align(16))] pub struct max_align_t([i64; 6]);
+    }
+}
diff --git a/src/windows/gnu.rs b/src/windows/gnu/mod.rs
similarity index 81%
rename from src/windows/gnu.rs
rename to src/windows/gnu/mod.rs
index d6736d87..e74628b9 100644
--- a/src/windows/gnu.rs
+++ b/src/windows/gnu/mod.rs
@@ -14,3 +14,10 @@ extern "C" {
         n: ::size_t,
     ) -> ::c_int;
 }
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    }
+}