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

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.

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;
 

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;

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)]