auto merge of #20980 : richo/rust/final-power, r=alexcrichton

Originally, this was going to be discussed and revisted, however I've been working on this for months, and a rebase on top of master was about 1 flight's worth of work so I just went ahead and did it.

This gets you as far as being able to target powerpc with, eg:

    LD_LIBRARY_PATH=./x86_64-unknown-linux-gnu/stage2/lib/ x86_64-unknown-linux-gnu/stage2/bin/rustc -C linker=powerpc-linux-gnu-gcc --target powerpc-unknown-linux-gnu hello.rs

Would really love to get this out before 1.0. r? @alexcrichton 

7 files changed, 46 insertions, 10 deletions

diff --git a/src/libstd/os.rs b/src/libstd/os.rs
index 588f729d800..fc0c838a3f1 100644
--- a/src/libstd/os.rs
+++ b/src/libstd/os.rs
@@ -1422,6 +1422,11 @@ mod arch_consts {
     pub const ARCH: &'static str = "mipsel";
 }
 
+#[cfg(target_arch = "powerpc")]
+mod arch_consts {
+    pub const ARCH: &'static str = "powerpc";
+}
+
 #[cfg(test)]
 mod tests {
     use prelude::v1::*;
diff --git a/src/libstd/rand/os.rs b/src/libstd/rand/os.rs
index 18d40ecd3eb..68ba7e1dd29 100644
--- a/src/libstd/rand/os.rs
+++ b/src/libstd/rand/os.rs
@@ -32,7 +32,8 @@ mod imp {
               any(target_arch = "x86_64",
                   target_arch = "x86",
                   target_arch = "arm",
-                  target_arch = "aarch64")))]
+                  target_arch = "aarch64",
+                  target_arch = "powerpc")))]
     fn getrandom(buf: &mut [u8]) -> libc::c_long {
         extern "C" {
             fn syscall(number: libc::c_long, ...) -> libc::c_long;
@@ -44,6 +45,8 @@ mod imp {
         const NR_GETRANDOM: libc::c_long = 355;
         #[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
         const NR_GETRANDOM: libc::c_long = 384;
+        #[cfg(target_arch = "powerpc")]
+        const NR_GETRANDOM: libc::c_long = 384;
 
         unsafe {
             syscall(NR_GETRANDOM, buf.as_mut_ptr(), buf.len(), 0u)
@@ -54,7 +57,8 @@ mod imp {
                   any(target_arch = "x86_64",
                       target_arch = "x86",
                       target_arch = "arm",
-                      target_arch = "aarch64"))))]
+                      target_arch = "aarch64",
+                      target_arch = "powerpc"))))]
     fn getrandom(_buf: &mut [u8]) -> libc::c_long { -1 }
 
     fn getrandom_fill_bytes(v: &mut [u8]) {
@@ -91,7 +95,8 @@ mod imp {
               any(target_arch = "x86_64",
                   target_arch = "x86",
                   target_arch = "arm",
-                  target_arch = "aarch64")))]
+                  target_arch = "aarch64",
+                  target_arch = "powerpc")))]
     fn is_getrandom_available() -> bool {
         use sync::atomic::{AtomicBool, ATOMIC_BOOL_INIT, Ordering};
 
@@ -119,7 +124,8 @@ mod imp {
                   any(target_arch = "x86_64",
                       target_arch = "x86",
                       target_arch = "arm",
-                      target_arch = "aarch64"))))]
+                      target_arch = "aarch64",
+                      target_arch = "powerpc"))))]
     fn is_getrandom_available() -> bool { false }
 
     /// A random number generator that retrieves randomness straight from
diff --git a/src/libstd/rt/libunwind.rs b/src/libstd/rt/libunwind.rs
index 7cc39d7d972..dd9923307d6 100644
--- a/src/libstd/rt/libunwind.rs
+++ b/src/libstd/rt/libunwind.rs
@@ -81,6 +81,9 @@ pub const unwinder_private_data_size: uint = 2;
 #[cfg(any(target_arch = "mips", target_arch = "mipsel"))]
 pub const unwinder_private_data_size: uint = 2;
 
+#[cfg(target_arch = "powerpc")]
+pub const unwinder_private_data_size: uint = 2;
+
 #[repr(C)]
 pub struct _Unwind_Exception {
     pub exception_class: _Unwind_Exception_Class,
diff --git a/src/libstd/sys/common/stack.rs b/src/libstd/sys/common/stack.rs
index ce5ab67ae61..88bb9395cf1 100644
--- a/src/libstd/sys/common/stack.rs
+++ b/src/libstd/sys/common/stack.rs
@@ -231,6 +231,12 @@ pub unsafe fn record_sp_limit(limit: uint) {
     unsafe fn target_record_sp_limit(_: uint) {
     }
 
+    // powerpc - FIXME(POWERPC): missing...
+    #[cfg(target_arch = "powerpc")]
+    unsafe fn target_record_sp_limit(_: uint) {
+    }
+
+
     // iOS segmented stack is disabled for now, see related notes
     #[cfg(all(target_arch = "arm", target_os = "ios"))] #[inline(always)]
     unsafe fn target_record_sp_limit(_: uint) {
@@ -326,6 +332,12 @@ pub unsafe fn get_sp_limit() -> uint {
         1024
     }
 
+    // powepc - FIXME(POWERPC): missing...
+    #[cfg(target_arch = "powerpc")]
+    unsafe fn target_get_sp_limit() -> uint {
+        1024
+    }
+
     // iOS doesn't support segmented stacks yet. This function might
     // be called by runtime though so it is unsafe to mark it as
     // unreachable, let's return a fixed constant.
diff --git a/src/libstd/sys/unix/c.rs b/src/libstd/sys/unix/c.rs
index 1d523ed6edd..fed700cc9d5 100644
--- a/src/libstd/sys/unix/c.rs
+++ b/src/libstd/sys/unix/c.rs
@@ -33,7 +33,9 @@ pub const FIONBIO: libc::c_ulong = 0x8004667e;
           target_os = "android"))]
 pub const FIONBIO: libc::c_ulong = 0x5421;
 #[cfg(all(target_os = "linux",
-          any(target_arch = "mips", target_arch = "mipsel")))]
+          any(target_arch = "mips",
+              target_arch = "mipsel",
+              target_arch = "powerpc")))]
 pub const FIONBIO: libc::c_ulong = 0x667e;
 
 #[cfg(any(target_os = "macos",
@@ -49,7 +51,9 @@ pub const FIOCLEX: libc::c_ulong = 0x20006601;
           target_os = "android"))]
 pub const FIOCLEX: libc::c_ulong = 0x5451;
 #[cfg(all(target_os = "linux",
-          any(target_arch = "mips", target_arch = "mipsel")))]
+          any(target_arch = "mips",
+              target_arch = "mipsel",
+              target_arch = "powerpc")))]
 pub const FIOCLEX: libc::c_ulong = 0x6601;
 
 #[cfg(any(target_os = "macos",
@@ -182,7 +186,9 @@ mod signal {
 }
 
 #[cfg(all(target_os = "linux",
-          any(target_arch = "mips", target_arch = "mipsel")))]
+          any(target_arch = "mips",
+              target_arch = "mipsel",
+              target_arch = "powerpc")))]
 mod signal {
     use libc;
 
diff --git a/src/libstd/sys/unix/stack_overflow.rs b/src/libstd/sys/unix/stack_overflow.rs
index 48a51813ba4..45680f52e73 100644
--- a/src/libstd/sys/unix/stack_overflow.rs
+++ b/src/libstd/sys/unix/stack_overflow.rs
@@ -150,6 +150,7 @@ mod imp {
               all(target_os = "linux", target_arch = "aarch64"),
               all(target_os = "linux", target_arch = "mips"), // may not match
               all(target_os = "linux", target_arch = "mipsel"), // may not match
+              all(target_os = "linux", target_arch = "powerpc"), // may not match
               target_os = "android"))] // may not match
     mod signal {
         use libc;
diff --git a/src/libstd/sys/unix/sync.rs b/src/libstd/sys/unix/sync.rs
index fbbdee1009d..c1e3fc88794 100644
--- a/src/libstd/sys/unix/sync.rs
+++ b/src/libstd/sys/unix/sync.rs
@@ -126,7 +126,8 @@ mod os {
     #[cfg(any(target_arch = "x86",
               target_arch = "arm",
               target_arch = "mips",
-              target_arch = "mipsel"))]
+              target_arch = "mipsel",
+              target_arch = "powerpc"))]
     const __SIZEOF_PTHREAD_MUTEX_T: uint = 24 - 8;
     #[cfg(target_arch = "aarch64")]
     const __SIZEOF_PTHREAD_MUTEX_T: uint = 48 - 8;
@@ -136,7 +137,8 @@ mod os {
               target_arch = "arm",
               target_arch = "aarch64",
               target_arch = "mips",
-              target_arch = "mipsel"))]
+              target_arch = "mipsel",
+              target_arch = "powerpc"))]
     const __SIZEOF_PTHREAD_COND_T: uint = 48 - 8;
 
     #[cfg(any(target_arch = "x86_64",
@@ -146,7 +148,8 @@ mod os {
     #[cfg(any(target_arch = "x86",
               target_arch = "arm",
               target_arch = "mips",
-              target_arch = "mipsel"))]
+              target_arch = "mipsel",
+              target_arch = "powerpc"))]
     const __SIZEOF_PTHREAD_RWLOCK_T: uint = 32 - 8;
 
     #[repr(C)]