Add musl definitions for x86, arm and asmjs

I've tested x86 against C locally, but not arm or asmjs.
I added the arm definitions because asmjs's C is derived from arms.

Mysteriously, my locally-built musl does not contain a
definition for _SC_2_C_VERSION, so I just removed it.

Author: brson

libc-test/build.rs

@@ -402,7 +402,9 @@ fn main() {
         // just insert some padding.
         (struct_ == "siginfo_t" && field == "_pad") ||
         // musl names this __dummy1 but it's still there
-        (musl && struct_ == "glob_t" && field == "gl_flags")
+        (musl && struct_ == "glob_t" && field == "gl_flags") ||
+        // musl seems to define this as an *anonymous* bitfield
+        (musl && struct_ == "statvfs" && field == "__f_unused")
     });
 
     cfg.fn_cname(move |name, cname| {

src/unix/notbsd/android/mod.rs

@@ -23,6 +23,7 @@ pub type time64_t = i64;
 pub type fsfilcnt_t = ::c_ulong;
 pub type fsblkcnt_t = ::c_ulong;
 pub type nfds_t = ::c_uint;
+pub type rlim_t = c_ulong;
 
 s! {
     pub struct stat {
@@ -468,6 +469,8 @@ pub const EFD_NONBLOCK: ::c_int = 0x800;
 pub const F_GETLK: ::c_int = 5;
 pub const F_GETOWN: ::c_int = 9;
 pub const F_SETOWN: ::c_int = 8;
+pub const F_SETLK: ::c_int = 6;
+pub const F_SETLKW: ::c_int = 7;
 
 pub const TCGETS: ::c_int = 0x5401;
 pub const TCSETS: ::c_int = 0x5402;

src/unix/notbsd/linux/mips.rs

@@ -10,6 +10,9 @@ pub type ino_t = u32;
 pub type blkcnt_t = i32;
 pub type blksize_t = i32;
 pub type nlink_t = u32;
+pub type fsblkcnt_t = ::c_ulong;
+pub type fsfilcnt_t = ::c_ulong;
+pub type rlim_t = c_ulong;
 
 s! {
     pub struct stat {
@@ -428,6 +431,8 @@ pub const EFD_NONBLOCK: ::c_int = 0x80;
 pub const F_GETLK: ::c_int = 14;
 pub const F_GETOWN: ::c_int = 23;
 pub const F_SETOWN: ::c_int = 24;
+pub const F_SETLK: ::c_int = 6;
+pub const F_SETLKW: ::c_int = 7;
 
 pub const SFD_NONBLOCK: ::c_int = 0x80;
 

src/unix/notbsd/linux/mod.rs

@@ -9,8 +9,6 @@ pub type ino64_t = u64;
 pub type off64_t = i64;
 pub type blkcnt64_t = i64;
 pub type rlim64_t = u64;
-pub type fsblkcnt_t = ::c_ulong;
-pub type fsfilcnt_t = ::c_ulong;
 pub type key_t = ::c_int;
 pub type shmatt_t = ::c_ulong;
 pub type mqd_t = ::c_int;

src/unix/notbsd/linux/musl/b32/arm.rs

@@ -0,0 +1,2 @@
+pub type c_char = u8;
+pub type wchar_t = u32;

src/unix/notbsd/linux/musl/b32/asmjs.rs

@@ -0,0 +1,2 @@
+pub type c_char = u8;
+pub type wchar_t = u32;

src/unix/notbsd/linux/musl/b32/mod.rs

@@ -0,0 +1,97 @@
+pub type c_long = i32;
+pub type c_ulong = u32;
+
+pub const __SIZEOF_PTHREAD_RWLOCK_T: usize = 32;
+pub const __SIZEOF_PTHREAD_MUTEX_T: usize = 24;
+
+pub const F_GETLK: ::c_int = 12;
+pub const F_SETLK: ::c_int = 13;
+pub const F_SETLKW: ::c_int = 14;
+
+
+s! {
+    pub struct stat {
+        pub st_dev: ::dev_t,
+        __st_dev_padding: ::c_int,
+        __st_ino_truncated: ::c_long,
+        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,
+        __st_rdev_padding: ::c_int,
+        pub st_size: ::off_t,
+        pub st_blksize: ::blksize_t,
+        pub st_blocks: ::blkcnt_t,
+        pub st_atim: ::timespec,
+        pub st_mtim: ::timespec,
+        pub st_ctim: ::timespec,
+        pub st_ino: ::ino_t,
+    }
+
+    pub struct stat64 {
+        pub st_dev: ::dev_t,
+        __st_dev_padding: ::c_int,
+        __st_ino_truncated: ::c_long,
+        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,
+        __st_rdev_padding: ::c_int,
+        pub st_size: ::off_t,
+        pub st_blksize: ::blksize_t,
+        pub st_blocks: ::blkcnt_t,
+        pub st_atim: ::timespec,
+        pub st_mtim: ::timespec,
+        pub st_ctim: ::timespec,
+        pub st_ino: ::ino_t,
+    }
+
+    pub struct pthread_attr_t {
+        __size: [u32; 9]
+    }
+
+    pub struct sigset_t {
+        __val: [::c_ulong; 32],
+    }
+
+    pub struct shmid_ds {
+        pub shm_perm: ::ipc_perm,
+        pub shm_segsz: ::size_t,
+        pub shm_atime: ::time_t,
+        __unused1: ::c_int,
+        pub shm_dtime: ::time_t,
+        __unused2: ::c_int,
+        pub shm_ctime: ::time_t,
+        __unused3: ::c_int,
+        pub shm_cpid: ::pid_t,
+        pub shm_lpid: ::pid_t,
+        pub shm_nattch: ::c_ulong,
+        __pad1: ::c_ulong,
+        __pad2: ::c_ulong,
+    }
+
+    pub struct msghdr {
+        pub msg_name: *mut ::c_void,
+        pub msg_namelen: ::socklen_t,
+        pub msg_iov: *mut ::iovec,
+        pub msg_iovlen: ::c_int,
+        pub msg_control: *mut ::c_void,
+        pub msg_controllen: ::socklen_t,
+        pub msg_flags: ::c_int,
+    }
+}
+
+cfg_if! {
+    if #[cfg(any(target_arch = "x86"))] {
+        mod x86;
+        pub use self::x86::*;
+    } else if #[cfg(any(target_arch = "arm"))] {
+        mod arm;
+        pub use self::arm::*;
+    } else if #[cfg(any(target_arch = "asmjs"))] {
+        mod asmjs;
+        pub use self::asmjs::*;
+    } else { }
+}

src/unix/notbsd/linux/musl/b32/x86.rs

@@ -0,0 +1,2 @@
+pub type c_char = i8;
+pub type wchar_t = i32;

src/unix/notbsd/linux/musl/b64/mod.rs

@@ -0,0 +1,88 @@
+pub type c_char = i8;
+pub type wchar_t = i32;
+pub type c_long = i64;
+pub type c_ulong = u64;
+
+pub const __SIZEOF_PTHREAD_RWLOCK_T: usize = 56;
+pub const __SIZEOF_PTHREAD_MUTEX_T: usize = 40;
+
+pub const F_GETLK: ::c_int = 5;
+pub const F_SETLK: ::c_int = 6;
+pub const F_SETLKW: ::c_int = 7;
+
+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 pthread_attr_t {
+        __size: [u64; 7]
+    }
+
+    pub struct sigset_t {
+        __val: [::c_ulong; 16],
+    }
+
+    pub struct shmid_ds {
+        pub shm_perm: ::ipc_perm,
+        pub shm_segsz: ::size_t,
+        pub shm_atime: ::time_t,
+        pub shm_dtime: ::time_t,
+        pub shm_ctime: ::time_t,
+        pub shm_cpid: ::pid_t,
+        pub shm_lpid: ::pid_t,
+        pub shm_nattch: ::c_ulong,
+        __pad1: ::c_ulong,
+        __pad2: ::c_ulong,
+    }
+
+    pub struct msghdr {
+        pub msg_name: *mut ::c_void,
+        pub msg_namelen: ::socklen_t,
+        pub msg_iov: *mut ::iovec,
+        pub msg_iovlen: ::c_int,
+        __pad1: ::c_int,
+        pub msg_control: *mut ::c_void,
+        pub msg_controllen: ::socklen_t,
+        __pad2: ::socklen_t,
+        pub msg_flags: ::c_int,
+    }
+}