Make vxworks functions public and add Risc-V targets

(backport <rust-lang#3935>)
(cherry picked from commit dd20281)

Cargo.toml

@@ -85,12 +85,14 @@ targets = [
     "riscv32i-unknown-none-elf",
     "riscv32imac-unknown-none-elf",
     "riscv32imc-unknown-none-elf",
+    "riscv32-wrs-vxworks",
     "riscv64gc-unknown-freebsd",
     "riscv64gc-unknown-hermit",
     "riscv64gc-unknown-linux-gnu",
     "riscv64gc-unknown-linux-musl",
     "riscv64gc-unknown-none-elf",
     "riscv64imac-unknown-none-elf",
+    "riscv64-wrs-vxworks",
     "s390x-unknown-linux-gnu",
     "s390x-unknown-linux-musl",
     "sparc-unknown-linux-gnu",

ci/build.sh

@@ -252,11 +252,13 @@ riscv32i-unknown-none-elf \
 riscv32imac-unknown-none-elf \
 riscv32imc-unknown-none-elf \
 riscv32gc-unknown-linux-gnu \
+riscv32-wrs-vxworks \
 riscv64gc-unknown-freebsd \
 riscv64gc-unknown-hermit \
 riscv64gc-unknown-linux-musl \
 riscv64gc-unknown-none-elf \
 riscv64imac-unknown-none-elf \
+riscv64-wrs-vxworks \
 s390x-unknown-linux-musl \
 sparc-unknown-linux-gnu \
 sparc64-unknown-netbsd \

src/vxworks/mod.rs

@@ -1878,8 +1878,8 @@ extern "C" {
     pub fn mq_setattr(mqd: ::mqd_t, newattr: *const ::mq_attr, oldattr: *mut ::mq_attr) -> ::c_int;
 
     // vxCpuLib.h
-    fn vxCpuEnabledGet() -> ::cpuset_t; // Get set of running CPU's in the system
-    fn vxCpuConfiguredGet() -> ::cpuset_t; // Get set of Configured CPU's in the system
+    pub fn vxCpuEnabledGet() -> ::cpuset_t; // Get set of running CPU's in the system
+    pub fn vxCpuConfiguredGet() -> ::cpuset_t; // Get set of Configured CPU's in the system
 }
 
 //Dummy functions, these don't really exist in VxWorks.
@@ -1980,6 +1980,12 @@ cfg_if! {
     } else if #[cfg(target_arch = "powerpc64")] {
         mod powerpc64;
         pub use self::powerpc64::*;
+    } else if #[cfg(target_arch = "riscv32")] {
+        mod riscv32;
+        pub use self::riscv32::*;
+    } else if #[cfg(target_arch = "riscv64")] {
+        mod riscv64;
+        pub use self::riscv64::*;
     } else {
         // Unknown target_arch
     }

src/vxworks/riscv32.rs

@@ -0,0 +1,4 @@
+pub type c_char = i8;
+pub type wchar_t = i32;
+pub type c_long = i32;
+pub type c_ulong = u32;

src/vxworks/riscv64.rs

@@ -0,0 +1,4 @@
+pub type c_char = i8;
+pub type wchar_t = i32;
+pub type c_long = i64;
+pub type c_ulong = u64;