enable LLVM's SPARC backend

Author: Jorge Aparicio

src/bootstrap/native.rs

@@ -81,7 +81,7 @@ pub fn llvm(build: &Build, target: &str) {
        .profile(profile)
        .define("LLVM_ENABLE_ASSERTIONS", assertions)
        .define("LLVM_TARGETS_TO_BUILD",
-               "X86;ARM;AArch64;Mips;PowerPC;SystemZ;JSBackend;MSP430")
+               "X86;ARM;AArch64;Mips;PowerPC;SystemZ;JSBackend;MSP430;Sparc")
        .define("LLVM_INCLUDE_EXAMPLES", "OFF")
        .define("LLVM_INCLUDE_TESTS", "OFF")
        .define("LLVM_INCLUDE_DOCS", "OFF")

src/librustc_llvm/build.rs

@@ -95,7 +95,7 @@ fn main() {
     let is_crossed = target != host;
 
     let optional_components =
-        ["x86", "arm", "aarch64", "mips", "powerpc", "pnacl", "systemz", "jsbackend", "msp430"];
+        ["x86", "arm", "aarch64", "mips", "powerpc", "pnacl", "systemz", "jsbackend", "msp430", "sparc"];
 
     // FIXME: surely we don't need all these components, right? Stuff like mcjit
     //        or interpreter the compiler itself never uses.

src/librustc_llvm/lib.rs

@@ -370,6 +370,12 @@ pub fn initialize_available_targets() {
                  LLVMInitializeMSP430Target,
                  LLVMInitializeMSP430TargetMC,
                  LLVMInitializeMSP430AsmPrinter);
+    init_target!(llvm_component = "sparc",
+                 LLVMInitializeSparcTargetInfo,
+                 LLVMInitializeSparcTarget,
+                 LLVMInitializeSparcTargetMC,
+                 LLVMInitializeSparcAsmPrinter,
+                 LLVMInitializeSparcAsmParser);
 }
 
 pub fn last_error() -> Option<String> {