Add support for loongarch64

Author: zhangwenlong8911

README.md

@@ -62,6 +62,7 @@ Tier 1:
   * x86_64-unknown-freebsd
   * x86_64-unknown-linux-gnu
   * x86_64-unknown-linux-musl
+  * loongarch64-unknown-linux-gnu
 
 Tier 2:
   * aarch64-apple-darwin

src/sys/ioctl/linux.rs

@@ -35,7 +35,8 @@ mod consts {
           target_arch = "x86_64",
           target_arch = "aarch64",
           target_arch = "riscv32",
-          target_arch = "riscv64"))]
+          target_arch = "riscv64",
+          target_arch = "loongarch64"))]
 mod consts {
     #[doc(hidden)]
     pub const NONE: u8 = 0;

src/sys/signal.rs

@@ -62,7 +62,8 @@ libc_enum!{
         #[cfg(all(any(target_os = "android", target_os = "emscripten",
                       target_os = "fuchsia", target_os = "linux"),
                   not(any(target_arch = "mips", target_arch = "mips64",
-                          target_arch = "sparc64"))))]
+                          target_arch = "sparc64",
+                          target_arch = "loongarch64"))))]
         SIGSTKFLT,
         /// To parent on child stop or exit
         SIGCHLD,
@@ -138,7 +139,8 @@ impl FromStr for Signal {
             #[cfg(all(any(target_os = "android", target_os = "emscripten",
                           target_os = "fuchsia", target_os = "linux"),
                       not(any(target_arch = "mips", target_arch = "mips64",
-                              target_arch = "sparc64"))))]
+                              target_arch = "sparc64",
+                              target_arch = "loongarch64"))))]
             "SIGSTKFLT" => Signal::SIGSTKFLT,
             "SIGCHLD" => Signal::SIGCHLD,
             "SIGCONT" => Signal::SIGCONT,
@@ -197,7 +199,9 @@ impl Signal {
             Signal::SIGTERM => "SIGTERM",
             #[cfg(all(any(target_os = "android", target_os = "emscripten",
                           target_os = "fuchsia", target_os = "linux"),
-                      not(any(target_arch = "mips", target_arch = "mips64", target_arch = "sparc64"))))]
+                      not(any(target_arch = "mips", target_arch = "mips64",
+                              target_arch = "sparc64",
+                              target_arch = "loongarch64"))))]
             Signal::SIGSTKFLT => "SIGSTKFLT",
             Signal::SIGCHLD => "SIGCHLD",
             Signal::SIGCONT => "SIGCONT",
@@ -312,7 +316,8 @@ const SIGNALS: [Signal; 28] = [
 #[cfg(all(any(target_os = "linux", target_os = "android",
               target_os = "emscripten", target_os = "fuchsia"),
           not(any(target_arch = "mips", target_arch = "mips64",
-                  target_arch = "sparc64"))))]
+                  target_arch = "sparc64",
+                  target_arch = "loongarch64"))))]
 #[cfg(feature = "signal")]
 const SIGNALS: [Signal; 31] = [
     SIGHUP,